LENNOX MWPD High Efficiency Mini Split Installation Guide

Before starting the installation process, please read and understand all safety information provided in the manual. It is crucial to follow safety guidelines to prevent personal injury or property damage.

Installation

Preparation
Ensure you have all the necessary tools and materials ready before starting the installation process. Verify the model numbers of both indoor and outdoor units.

Indoor Unit Installation

Attach the mounting bracket securely to the wall.

Drill the wall for pipe penetration.
Connect refrigerant pipes, power cables, communication cables, and drain hose.

Tape the pipes, cables, and drain hose securely.

Outdoor Unit Installation

Mount the outdoor unit in a suitable location.

Connect cables and pipes to the outdoor unit.

Installation Inspection and Testing

Perform a drain leak test, pressure tests using nitrogen, evacuate the system, add refrigerant if needed, and prepare the system for commissioning.

Maintenance Procedures

Refer to the maintenance procedures outlined in the manual for regular upkeep of the system. Sub PCB installation is an optional accessory.

Setting the Installation Options

Follow the instructions to configure the installation options based on your requirements.

FAQs

Q: What should I do if I encounter a warning symbol during installation?
A: If you encounter any warning symbols during installation, refer to the manual for detailed instructions on how to proceed safely.

Q: How often should I perform maintenance on the system?
A: Regular maintenance is essential for optimal performance. Follow the maintenance procedures outlined in the manual and schedule periodic checks as recommended.

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Mini-Split Installation manual
MWHD/MWLD/MWPD Outoor and MWHD/MWMD Indoor
· Thank you for purchasing this Lennox Mini-Split. · Before installing this unit, please read this installation manual carefully and retain it for future reference.
DB68-12967A-00 December 2024

Safety Information

WARNING: Read This Manual
· Read and follow all safety information and instructions before installation, use, or maintenance of this appliance. Incorrect installation, use, or maintenance of this appliance can result in death, serious injury, or property damage. Keep these instructions with this appliance. This manual is subject to change. For the latest version, visit www.lennox.com for homeowners, www.lennoxpros.com for dealer/contractor.
This manual explains how to install a split-system, ductless unit using matched indoor and outdoor units. The manufacturer shall not be responsible for damages arising from the use of non-compatible units. For information on compatible units and unit specifications, refer to the submittal document for the applicable model, available at www.lennox.com for homeowners, www.lennoxpros.com for dealer/contractor. Because the instructions in this manual cover various models, the characteristics of your Mini-Split may differ slightly from those described. If you have any questions, please contact your dealer or visit www.lennox.com for homeowners, www.lennoxpros.com for dealer/contractor. This device complies with Industry Canada license exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation. This Class B digital apparatus complies with Canadian ICES-003. This equipment complies with FCC and IC RSS- 102 radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 23.62 inch (600mm) between the radiator & your body. Any changes or modifications not expressly approved by the manufacturer could void manufacturer’s warranty.

ENERGY STAR qualified systems only Proper sizing and installation of equipment is critical to achieve optimal performance. Mini-Split and heat pumps (excluding ductless systems) must be matched with appropriate coil components to meet ENERGY STAR criteria. Ask your contractor for details or visit www.energystar.gov.

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Safety Information

Notices and notes

FOR GENERAL

To make you aware of safety messages and highlighted information, we use the following notices and notes throughout this manual:

WARNING
Hazards or unsafe practices that may result in severe personal injury or death.

CAUTION
Hazards or unsafe practices that may result in minor personal injury or property damage.

IMPORTANT Information of special interest

NOTE Supplementary information that may be useful

Symbol

Meaning

Flammable gas

Refrigerant Safety Group
A2L

Warnning: flammable materials
Refrigerant safety group
Read installation manual

Refer to installation manual

Read service manual

4 English

California Proposition 65 Warning (US)
WARNING: Cancer and Reproductive Harm
– www.P65Warnings.ca.gov.
This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge unless they have been given supervision or instruction concerning the use of the appliance by a person responsible for their safety.

WARNING
The installation and testing of this appliance must be performed by a qualified technician. · The instructions in this manual are not intended as a
substitute for proper training or adequate experience in the safe installation of the appliance. Work shall be undertaken under a controlled procedure to minimize the risk of flammable gas or vapor being present while the work is being performed. This unit is a PARTIAL UNIT MINI-SPLIT, complying with PARTIAL UNIT requirements of this Standard. It must only be connected to other units that have been confirmed as complying with corresponding PARTIAL UNIT requirements of this Standard, UL 60335-2-40/CSA C22.2 No. 60335-2-40, or UL 1995/CSA C22.2 No 236.

General information

· All pipe work including piping material, pipe routing, and installation shall include protection from physical damage in operation and service and comply with national and local codes and standards, such as ASHRAE 15, ASHRAE 15.2, IAPMO Uniform Mechanical Code, ICC International Mechanical Code, or CSA B52. Any field joints shall be accessible for inspection before being covered or enclosed.
· The Mini-Split should be used only for the applications for which it has been designed: the indoor unit is not suitable to be installed in areas used for laundry.
· Wear protective equipment (such as safety gloves, goggles, and headgear) during installation and maintenance work. Installation/repair technicians may be injured if improper protective equipment is worn.
· Do not use means to accelerate the defrost operation or to clean, other than those recommended by Lennox.
· Do not pierce or burn. · Be aware that refrigerants may not contain an odor.

Installation of the product
· The units must be installed in compliance with the clearances indicated in the installation manual to ensure either accessibility from both sides or ability to perform routine maintenance and repairs. The units’ components must be accessible and serviceable in conditions of complete safety. For this reason, where it is not observed as indicated into the Installation Manual, the cost necessary to reach and repair the unit (safely as required by local regulations) with slings, trucks, scaffolding or any other means of elevation won’t be considered in-warranty during any applicable labor warranty period.
· The outdoor unit shall be installed in an open space that is always ventilated.

· Please adhere to the local gas regulations.
· To handle, purge, and dispose the refrigerant, or to break into the refrigerant circuit, the technician should have a certificate from an industry-accredited authority.
· The installed refrigerant pipes should be kept to a minimum (do not install additional, unnecessary refrigerant pipe).
· Do not install the indoor unit in the following areas:
– Area filled with minerals, splashed oil, or steam. It will deteriorate plastic parts, causing failure or leakage.
– Area that is close to heat sources.
– Area that produces substances such as sulfuric gas, chlorine gas, acid, and alkali. It may cause corrosion of the piping and brazed joints.
– Area that can cause leakage of combustible gas and suspension of carbon fibers, flammable dust, or volatile flammables.
– Area where refrigerant leaks and settles.
– Area where animals may urinate on the product. Ammonia may be generated.
· Do not use the indoor unit for the preservation of food items, plants, equipment, and art works. This may cause deterioration of their quality.
· Non-duct connected appliances containing A2L refrigerants with the supply and return air openings in the conditioned space may be installed in open areas such as false ceilings not being used as return air plenums, if the conditioned air does not directly communicate with the air within the false ceiling.
· Do not install the indoor unit if it has any drainage problem.

· Because your Mini-Split contains R-32 refrigerant, make sure that it is installed, operated, and stored it in a room whose floor area is larger than the minimum required floor area specified in the following table:

Minimum Room Area (ft2)

m (lb)

Reference Height h0 (ft.)

4.05

– no room area restrictions –

4.01

4.51

5.01

5.51

6.01

107

6.51

115

– m : Total refrigerant charge in the system
– Calculated in accordance with UL 60335-2-40 Annex GG
· IMPORTANT: It’s mandatory to either follow the table above or follow the federal, state, and/or local regulations regarding the minimum room area allowed for the total refrigerant charge in the system.
· The actual refrigerant charge shall be per room size within which the refrigerant-containing parts are installed.
· Ventilation machinery and outlets shall be operational and not obstructed.
· Markings to the equipment shall continue to be visible and legible. Markings and signs that are illegible shall be corrected.
· Refrigerating pipe or components shall be installed in a position where they are unlikely to be exposed to any substance that may corrode refrigerant containing components, unless the components are constructed of materials that are inherently resistant to being corroded or are suitably protected against being so corroded.

Installation of the outdoor unit
· While in installation or relocation of the product, do not mix the refrigerant with other gases including air or unspecified refrigerant. Failure to do so may cause pressure increase and result in rupture or injury.
· Do not cut or burn the refrigerant container or piping.
· Use clean parts such as manifold gauge, vacuum pump, and charging hose for the refrigerant.
· Installation must be carried out by qualified personnel for handling the refrigerant. Additionally, reference local and national regulations and laws.
· Be careful not to let foreign substances (lubricating oil, refrigerant, water, etc.) enter the piping. The application of oil or refrigerant deteriorates the piping which can result in English 5

Safety Information

drain leakage. For storage, securely seal their openings.
· When mechanical ventilation is required, ventilation openings shall be kept clear of obstruction.
· For disposal of the product, follow the local laws and regulations.
· Do not work in a confined place.
· The work area shall be secured to only allow access by the technician(s).
· The refrigerant piping shall be installed in a position where there are no substances that may result in corrosion.
· The following checks shall be performed for installation:
– The charging amount depends on the room size. – The ventilation devices and outlets are operating
normally and are not obstructed.
– Markings and signs on the equipment shall be visible and legible.
· Upon leakage of the refrigerant, ventilate the room. When the leaked refrigerant is exposed to flame, it may cause the generation of toxic gases.
· Make sure that the work area is safe from flammable substances.
· To purge air in the refrigerant pipes, be sure to use a vacuum pump.
· Note that the refrigerant has no odor. · The units are not explosion proof so they must be installed
with no risk of explosion.
· This product contains fluorinated gases that contribute to the global greenhouse effect. Accordingly, do not vent gases into the atmosphere.
· Models that use R-32 refrigerant have a different thread diameter for the charging port to prevent charging failure. Therefore, check its diameter (0.5 inch) in advance.
· Servicing shall be performed as recommended by the manufacturer. In case other skilled persons are joined for servicing, it shall be carried out under the supervision of the person who is competent in handling flammable refrigerants.
· For servicing the units containing flammable refrigerants, safety checks are required to minimize the risk of ignition.
· Servicing shall be performed following the controlled procedure to minimize the risk of flammable refrigerants or gases.
· Do not install where there is a risk of combustible gas leakage.
· Do not place near heat sources. · Be cautious not to generate a spark as follows:
– Do not remove fuses with power on. · If the indoor unit is not R-32 compatible, an error signal
appears and the unit will not operate.

· After installation, check for leakage. Toxic gas may be generated if it comes into contact with an ignition source such as a fan heater, stove, or propane cylinders. Make sure that only refrigerant recovery cylinders are used.
Preparation of fire extinguisher
· If hot work is to be done, appropriate fire extinguishing equipment should be available.
· A dry powder or CO fire extinguisher shall be equipped near the charging area.
Ignition sources free
· Make sure to store the units in a place without continuously operating ignition sources (for example, open flames, an operating gas appliance or an operating electric heater).
· The service technicians shall not use any ignition sources with the risk of fire or explosion.
· Potential ignition sources shall be kept away from the work area where the flammable refrigerant can be released into the surroundings.
· The work area should be checked to ensure that there are no flammable hazards or ignition risks. The “No Smoking” sign shall be attached.
· Under no circumstances shall potential sources of ignitionbe used while detecting refrigerant leaks.
· Make sure that the seals or sealing materials have not degraded.
· Safe parts are the ones with which the worker can work in a flammable atmosphere. Other parts may result in ignition due to leakage.
· Replace components only with parts specified by Lennox. Other parts may result in the ignition of refrigerant in the atmosphere from a leak.
· Ducts connected to the product shall not contain a potential ignition source.
Area ventilation
· Make sure that the work area is well ventilated before performing hot work.
· Ventilation shall be made even during the work. · The ventilation should safely disperse any released gases
and preferably expel them into the atmosphere. · Keep any required ventilation openings clear of
obstruction.

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Safety Information

Leakage detection methods

Recovery

· Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may not be adequate or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.)
· Make sure that the detector is not a potential source of ignition.
· Leak detection equipment shall be set at a percentage of the LFL (Lower flammable limit) of the refrigerant and shall be calibrated to the refrigerant employed and the appropriate percentage of gas (25 % maximum) is confirmed.
· The use of detergents containing chlorine shall be avoided for cleaning because the chlorine may react with the refrigerant and corrode the piping.
· If leakage is suspected, naked flames shall be removed. · If a leakage is found while brazing, the entire refrigerant
charge shall be recovered from the product or isolated (e.g. using shut-off valves). It shall not be directly released into the environment. Oxygen free nitrogen (OFN) shall be used for purging the system before and during the brazing process. · The work area shall be checked with an appropriate refrigerant detector before and during work. · Ensure that the leakage detector is appropriate for use with flammable refrigerants.
Labeling
· The parts shall be labeled to ensure that they have been decommissioned and emptied of refrigerant.
· The labels shall note the date of application. · Make sure that the labels are affixed to the system to
notify it contains flammable refrigerant.
Refrigerant-related works
· Before performingrefrigerant-related work, make sure the following: – Capacitors are discharged. Discharging capacitors must be done safely to avoid the possibility of sparking. – No live electrical components and wiring are exposed while charging, recovering, or purging refrigerant from the system. – There is continuity of earth bonding.

· When removing refrigerant from the system for servicing or decommissioning, it is recommended to remove the entire refrigerant charge.
· When transferring refrigerant into cylinders, make sure that only refrigerant recovery cylinders are used.
· All cylinders used for the recovered refrigerant shall be labeled.
· Cylinders shall be equipped with pressure relief valves and shut-off valves in a proper order.
· Empty recovery cylinders shall be evacuated and cooled before recovery.
· The recovery system shall operate normally according to the specified instructions and shall be suitable for refrigerant recovery.
· In addition, the calibration scales shall operate normally. · Hoses shall be equipped with leak-free disconnect
couplings.
· Before starting the recovery, check for the status of the recovery system and sealing state. Consult with the manufacturer if suspected.
· The recovered refrigerant shall be returned to the supplier in the correct recovery cylinders with the Waste Transfer Note attached.
· Do not mix refrigerants in the recovery units or cylinders. · If compressors or compressor oils are to be removed, make
sure that they have been evacuated to an acceptable level to ensure that flammable refrigerant does not remain in the lubricant.
· The evacuation process shall be performed before sending the compressor to the suppliers.
· Only the electrical heating of the compressor body is allowed to accelerate the process.
· Oil shall be drained safely from the system. · Never install motor-driven equipment to prevent ignition.
Power supply line, fuse, or circuit breaker
· Be sure not to perform power cable modification, extension wiring, and multiple wire connection.
– It may cause electric shock or fire due to poor connection, poor insulation, or current limit override.
· All power wiring and communication cables must comply with applicable local and national codes.

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Preparation

Step 1-1 Typical installation overview

Evaporator/ fancoil (indoor)

Maximum pipe height Maximum pipe length

Refrigerant lines, electric, and drain

Make at least one round to reduce noise and vibration.

Compressor/ condenser (outdoor)

The actual units may look different from the images depicted here.

Model ****009/012****** ****015/018/024******

Minimum 9.8 (3) 9.8 (3)

Pipe length

Maximum

Standard for factory charge

65.6 (20)

24.6 (7.5)

98.4 (30)

24.6 (7.5)

Unit : ft (m) Pipe height Maximum
49.2 (15)
65.6 (20)

Outdoor Unit Outer wall

CCAAUUTTIIOON

Make a U-trap (A) on the pipe (which is connected to the indoor unit) at outer wall and cut the bottom part of the insulation (about 1/2 inch) to allow rainwater to drain from within the insulation.

Indoor Unit
(A) Cut insulation to allow
rainwater to drain

CAUTION
· For the product that uses the R-32 refrigerant, Install the indoor unit on the wall 5.9 feet or higher from the floor.

Installation

8 English

Step 1-2 Verifying model numbers
Check the model numbers on the boxes to make sure that the indoor and outdoor units are compatible with each other.

Nominal capacity (Btu/hour) 9,000 12,000 15,000 18,500 22,000 9,000 12,000 15,000 18,500 22,000 9,000 12,000 15,000 18,500 22,000

Indoor unit model number MWMD009S6-1P MWMD012S6-1P MWMD015S6-1P MWMD018S6-1P MWMD024S6-1P MWMD009S6-1P MWMD012S6-1P MWMD015S6-1P MWMD018S6-1P MWMD024S6-1P MWHD009S6-1P MWHD012S6-1P MWHD015S6-1P MWHD018S6-1P MWHD024S6-1P

Outdoor unit model number MWLD009S6S-1P MWLD012S6S-1P MWLD015S6S-1P MWLD018S6S-1P MWLD024S6S-1P MWPD009S6S-1P MWPD012S6S-1P MWPD015S6S-1P MWPD018S6S-1P MWPD024S6S-1P MWHD009S6S-1P MWHD012S6S-1P MWHD015S6S-1P MWHD018S6S-1P MWHD024S6S-1P

Installation

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Preparation

Step 1-3 Choosing the installation location
If installing a Multi-Zone Heat Pump, install as described in the installation manual supplied with the Multi-Zone Heat Pump outdoor unit.
WARNING
· Verify that a dedicated circuit breaker and a disconnect switch of the appropriate sizes for the Mini-Split are preinstalled and available for use.
· Verify that the voltage and frequency of the power supply comply with the rated voltage as defined on the unit name plate.
· Verify that a suitable grounding connection is available. · Do not install this appliance in an environment
containing hazardous substances or close to equipment that releases open flames. · Do not install this appliance near a heater or flammable material.
CAUTION
· The manufacturer shall not be responsible for damage occurring as a result of the wrong voltage being applied to this Mini-Split.
· The indoor and outdoor units must be installed in compliance with minimum clearances to ensure that both units are accessible from both sides and can be maintained or repaired. Insufficient clearance may reduce product performance, generate excessive noise, and reduce the life of some unit components.

Indoor unit location requirements
WARNING
· Do not install the unit in a humid, oily, or dusty location or in a location exposed to direct sunlight, water, or rain.
· Make sure that the wall can support the unit weight.
Examine the area that the customer wants to be air conditioned. Consider the following: · What wall location will meet minimum clearances and
provide optimal product performance? · Will the wall provide adequate support for the unit
weight (wall with stud construction or concrete)? If applicable, where are the studs? · Where will you place the wall penetration for routing the piping bundle (consisting of power and communication cables, refrigerant pipes, and the drain hose) through the wall to the outdoor unit? Will the hole intersect any plumbing or wires in the wall? · Is the location as close as possible to where the outdoor unit will be installed, to minimize the length of piping and cables? · Will the condensate drain inside the room, through the wall penetration to the outdoor unit, or be connected to a condensate pump?
NOTE
· This manual covers a typical gravity-drain installation where the drain hose is routed to the outdoor unit through a hole in the wall.

IMPORTANT
· Any changes or modifications to the installation described in this manual that are not expressly approved by the manufacturer could void the manufacturer’s warranty.

To determine where to locate the indoor and outdoor units, you must survey the entire site and consider many variables. The goal is to select locations that comply with all safety precautions while also minimizing the total effort involved.

Installation

10 English

Minimum clearances for the indoor unit
Ceiling

CAUTION
· Do not connect the drain hose to existing waste pipes as odors may arise.

5 inch (125 mm)

4 inch (100 mm)

Wall
5 inch (125 mm)

Outdoor unit location requirements
Examine the area where the outdoor unit could be located. Consider the following:
· What location will meet minimum clearances and provide optimal product performance?
· Is there an existing level and hard foundation, such as a concrete pad, that will support the unit weight and produce minimal vibration? Installation on uneven ground may result in abnormal vibrations, noise, or problems with the unit.
· Does the unit need to be mounted on the wall? · Where are the dedicated circuit breaker and disconnect
switch located? How will you connect them to the unit?
· How will you route the piping bundle from the indoor unit? Is the location as close as possible to where the indoor unit will be installed, to minimize the length of piping and cables?
· Will the unit be sheltered from the wind? In a high-wind area, you may need to build a protective fence around the unit.
· Where will the condensate drain?
WARNING
· The drain location must allow condensate to drain properly and prevent ice from forming on the unit in winter. If a block of ice falls from the unit, it may result in death, serious injury, or property damage. Improper or inadequate draining may result in water overflowing and property damage.

Installation on an exterior wall
If the outdoor unit must be installed on an exterior wall, you will need an L-bracket to support the unit. This bracket is not included with the unit.
WARNING
· The wall must be capable of supporting the weight of both the L-bracket and the outdoor unit. If the unit falls, it may result in crushing, electric shock, fire, or explosion that could cause death, severe personal injury, or property damage.
Installation Guide at the seashore
Make sure to follow below guides when installing at the seashore. 1 Do not install the product in a place where it is directly
exposed to sea water and sea breeze.
– Make sure to install the product behind a structure (such as building) that can block see breeze.
– Even when it is inevitable to install the product in seashore, make sure that product is not directly exposed to sea breeze by installing a protection wall.
2 Consider that the salinity particles clinging to the external panels should be sufficiently washed out.
3 Because the residual water at the bottom of the outdoor unit significantly promotes corrosion, make sure that the slope does not disturb drainage.
– Keep the floor level so that rain does not accumulate. – Be careful not to block the drain hole due to foreign
substance. 4 When product is installed in seashore, periodically clean it
with water to remove attached salinity. 5 Make sure to install the product in a place that provides
smooth water drainage. Especially, ensure that the base part has good drainage. 6 If the product is damaged during the installation or maintenance, make sure to repair it.

Installation

English 11

Preparation

7 Check the condition of the product periodically.
– Check the installation site every 3 months and perform anti-corrosion treatment such as commercial water repellent grease and wax, etc., based on the product condition.
– When the product is to be shut down for a long period of time, such as off-peak hours, take appropriate measures like covering the product.
8 If the product installed within 1640.4 ft (500 m) of seashore, special anti-corrosion treatment is required.
Please contact your local LENNOX representative for further details.

Sea breeze

Outdoor unit

Sea Sea breeze

Outdoor unit

Sea

Minimum clearances for the outdoor unit If there is an obstacle in front of the air outlet, keep the outdoor unit at a distance of at least 27.5 in. (700 mm) from the obstacle. Legends:
Wall
Minimum clearance in inch (mm)

11.8 (300)

23.6 (600)
Air flow direction

Top view

Side view

Examples for installing one outdoor unit: Unit: inch (mm)

5 9 (1500)

11.8 (300)
11.8 (300)

5 9 (1500)

Protection wall Sea breeze

Outdoor unit

Outdoor unit Sea
· Protection wall should be constructed with a solid material that can block the sea breeze and the height and width of the wall should be 1.5 times larger than the size of the outdoor unit. (You must secure more than 2 ft (600 mm) of space between the protection wall and the outdoor unit for air circulation.)

5.9 (150)

23.6 (600)

11.8 (300)

78.74 (2000)

11.8

Installation

(1500) (300)

19.6 (500)

5 9

12 English

Examples for installing multiple outdoor units: Unit: inch (mm)

23.6 118.11

(1500) (600) (3000)

118.11 (3000)

7.87 (200)

(1500) (300)

11.8

5 9

23.6 (600)

5 9 (1500)

11.8 (300)

Step 1-4 Unpacking
Upon receipt, inspect the product to verify that it has not been damaged during transport. If the product appears damaged, do not install it and immediately report the damage to your local Lennox distributor. Packing material must be disposed of in accordance with local regulations.
Unpacking the indoor unit
At the selected indoor unit location: 1 Open the indoor unit package. 2 Remove the left and right cushions. 3 Carefully remove the unit from the package. 4 Place the unit on a flat surface where it will be protected
from possible damage.
Unpacking the outdoor unit
At the selected outdoor unit location: 1 Remove the package. 2 Remove the top cushion. 3 Carefully remove the unit from the bottom cushion. 4 Place the unit on a flat surface where it will be protected
from possible damage.

11.8 (300)

23.6 (600)

19.6 (500)

11.8 (300)

19.6 (500)

11.8 (300)

Installation

English 13

Preparation

Step 1-5 Preparing materials and tools

Materials in the indoor unit package

Make sure that the indoor unit package contains the following materials:

Mounting bracket (1) ****007/009/012*****
**MD015M****

Mounting bracket (1) **MD015S**** **HD015S****
****018/024*****

Remote control (1)

User manual (1)

Installation manual (1)

Materials in the outdoor unit package
Make sure that the outdoor unit package contains the following materials:

Rubber foot (4)

Drain plug (1) ****009/012/015******
**LD018/024****** **HD018******

If installing a Multi-Zone Heat Pump, install as described in the installation manual supplied with the Multi-Zone Heat Pump outdoor unit.
Optional accessories
For information on the accessories that are available for each model, refer to the submittal documents available at www. lennox.com for homeowners, www.lennoxpros.com for dealer/contractor.
Materials supplied by the installer
Make sure you have all other materials required for the selected installation method and location.
IMPORTANT
· No mounting hardware, tubing, cables, and other materials listed below are included with the appliance.
The required materials will vary, but may include the following: · 6-ft electrical whip for connecting the power from the
installed disconnect switch to the outdoor unit · UV-resistant vinyl line set tape for the exposed line set · Lines-set cover and fittings, if used · Miscellaneous pipe hangers · Miscellaneous screws and anchors for hanging pipe
hangers, the line-set cover, the indoor unit mounting plate, and so on. · Electrical ring connectors for connecting all power and communication wiring · Electrical tape · Refrigerant R-32 if additional refrigerant is required due to line-set length · Closed cell foam tape insulation (roll) · Outdoor unit risers or L-brackets for wall installation · Silicone caulking for sealing the wall penetration · Rags

Drain plug (2) **PD018/024******
**HD024******
14 English

Piping and cables
Connecting the indoor and outdoor units requires a premanufactured refrigeration line set (recommended) or a line set assembled by the installer that includes.
· Soft-copper line set insulated with closed-cell foam insulation
· 16/2 cable, for communication (F1/ F2) wiring · 14/3 flexible metallic underground cable with green grounding
wire, for power wiring from the outdoor unit to the indoor unit
· 5/8-inch ID drain hose with adapter fitting, for gravity drain applications that require an extension
· Make sure that the line set is longer than needed to reach from the indoor to the outdoor unit, to allow for bends and

Installation

final connections. For more on pipe lengths, see Step 1-1 Typical installation overview on page 8.
· If not using a premanufactured line set:
– Only use insulated seamless refrigeration-grade copper pipe (Cu DHP-type according to ISO1337), degreased and deoxidized, suitable for operating pressures of at least 609 psig (4200 kPa) and for a burst pressure of at least 3002 psig (20700 kPa).
– Do not use sanitary-type copper pipe under any circumstances.
– Use standard cables.

Cable
Power cable
Communication cable

Terminal L1, L2, ground
F1, F2

Wire Specification
14/3 AWG
16/2 AWG Stranded cable

NOTE · This manual does not include instructions for extending
cables. If you need to extend the cables, follow local codes.
Tools
Make sure you have the required tools available.

Safety tools
· Service disconnect lock and tag · Circuit breaker lock and tag · Safety glasses · Cut-proof gloves · Hearing protection · Hard hat, for use in appropriate areas · Safety vest, for visibility as required
General tools
· 36-inch spirit level · 8-inch to 9-inch torpedo level · Cordless drill

· #2 Phillips-bit driver for cordless drill · Phillips screw driver · Slotted screw driver · Corded hammer drill, for masonry anchors if used · Masonry drill bit, for masonry anchors if used · Compact bandsaw, for cutting all thread and/or unistrut
channel as required · Stud finder, for stud-wall construction as required · 2-5-inch hole saw, standard, or diamond core for
concrete or cinder block construction · Metric hex-key set · Razor knife · 25-ft tape measure
Electrical tools
· Clamp-on multimeter, for measuring volt AC, resistance, and amperage
· Non-contact thermometer (may be incorporated into multimeter)
· Wire strippers · Wire connector crimping tool · Cutting pliers
Piping tools
· Flaring tool · Deburring tool · Piping bender, spring type · Tubing cutter, imp style · Tubing cutter, standard style · Open-end torque wrench (ft.-lbs.) · Crescent wrench
Refrigeration tools
· Manifold set for R-32 · 5/16-inch to ¼-inch flare adapter · Shrader core removal tool · 2-stage vacuum pump with oil · Electronic refrigerant scale (lbs/oz), if additional
refrigerant is required due to line length · Recovery machine with tank, if required · Micron vacuum gauge · ¼-inch vacuum gauge hose tee · Nitrogen regulator · Nitrogen cylinder, charged

Installation

English 15

Indoor Unit Installation

Step 2-1 Attaching the mounting bracket to the wall
1 Hold the mounting bracket against the wall at the selected installation position (Step 1-3 on page 10), making sure that the screw holes align with the center of the studs in the wall. If the screw locations do not align with the studs, use wall anchors.
CAUTION
· The recommended best practice is to attach the mounting bracket directly to the studs in the wall. If you did not find a suitable location with studs (in Step 1-3 on page 10), or if the wall is concrete, you must use wall anchors of a suitable type and weight capacity, and install them according to the manufacturer’s instructions. Failure to do so may cause the material surrounding the joints to crumble over time and the screws to be loosened and stripped. This may result in the unit falling from the wall, which could cause physical injury or equipment damage.
2 Using a level, make sure that the mounting bracket is level, then mark the location of the screw holes on the wall.
3 If using wall anchors, install them at the screw hole positions, following the manufacturer’s instructions.
4 Using six field-supplied mounting screws and anchors (if applicable), attach the bracket to the wall.
Level

Step 2-2 Drilling the wall penetration
1 Determine the position of the hole through which the piping bundle (consisting of power and communication cables, refrigerant pipes, and the drain hose) will pass. Consider the following: – The hole inner diameter must be 2.5 inches (65 mm). – The recommended hole location is behind the unit so that the hole and the piping bundle will not be visible in the room. The minimum distances between the hole and the mounting bracket are:
Center of indoor unit (B) Center of indoor unit (A)

Possible positions for hole behind unit

Model

Unit: inch(mm)

**HD007/009/012***** A 6.49(165) 12.00(305) 16.37(416)

**MD007/009/012***** B
**MD015M****

**MD015S****

**HD015S****

****018/024*****

6.49(165) 12.00(305) 19.13(486) 6.49(165) 13.66(347) 23.95(608.5)

Screw Location x 4ea

– If the hole cannot be positioned behind the unit, find a position as close to the unit as possible. The piping bundle that exits the unit and extends to the hole will need to be attached to the wall and will be visible inside the room.
– In relation to the bracket shown above, the unit is shipped with the drain hose connection on the right, the drain hose exits the unit on the left, and the refrigerant pipes are bent to exit on the left. Thus, positioning the hole to the left requires the least effort. If you position the hole to the right or below the unit, you will need to move the drain hose connection to the left and bend the pipes so that the hose and pipes exit to the right or bottom. See the figure in step 3 on page 17.

Installation

16 English

2 Use a standard 2.5-inch (65-mm) hole saw to drill one hole at the selected location, at a 15° downward angle so that the drain hose will drain properly.

Wall

Indoor unit

Drain hose

3 Based on the hole location, determine where the piping bundle (drain hose, refrigerant pipes, and cables) will exit the unit.

IMPORTANT
· When installing the unit, always connect the refrigerant pipes first, followed by the electrical cables. For disassembly, always disassemble the electric cables before the refrigerant pipes.
Two short refrigerant pipes are already attached to the MiniSplit:
· The smaller-diameter pipe is for the high-pressure, two-phase refrigerant.
· The larger-diameter pipe is for the low-pressure refrigerant vapor.

Left Right
<Front view>
Rear right or left <Side view>
NOTE · The left or right exit will only be used if the hole is not
positioned behind the unit.
Step 2-3 Connecting the refrigerant pipes
Connect indoor and outdoor units with field-supplied copper pipes by means of flare connections. Use insulated seamless refrigeration grade pipe only, (Cu DHP type according to ISO1337), degreased and deoxidized, suitable for operating pressures of at least 609psi and for burst pressure of at least 3000psi. Under no circumstances must sanitary type copper pipe be used.

Drain hose Refrigerant Connection hose pipes
(assembly pipe)
In Step 2-3, step 3 you determined the exit position for the piping bundle. The unit has three knockouts available for the left, right, and bottom exits. When the bundle exits directly from the rear, none of the knockouts are used.
1 If the pipes will exit directly from the rear, skip to step 3. Otherwise, cut out the appropriate knockout piece (left, right, or bottom).
2 Use a razor knife to clean the cut edges (flashing).
3 The left exit is the only position that does not require bending the pipes. For other positions, bend the pipes so that they will exit in the selected exit position.
– The bending radius should be greater than 4 inch (100 mm).
– Bend the smaller pipe gradually to prevent kinking. The larger pipe has a preinstalled spring bender to prevent kinking.
– Make sure that the pipes do not protrude from the back of the unit in a way that will make it difficult to attach the unit to the mounting bracket.
– For right and bottom exits, pull the pipes out through the selected knockout opening. For left exits, the piping connections will be made in the service space behind the indoor unit (under the cover panel).

Installation

English 17

Indoor Unit Installation

NOTE
· If you are using the right rear exit, the pipes should be long enough to extend through the wall without needing to connect the line set first. It may be easier to connect the line set outside of the building, after you have bundled the pipes and cables and passed the bundle through the wall. In this case, do not connect the line set now. Instead, complete Step 2-4 through Step 2-6, then go outside and connect the line set as described below.
4 Slowly remove the protective caps on the refrigerant pipe connections to relieve the nitrogen holding charge.
5 Connect the line set to each pipe.
Flare nut

Indoor outlet pipe

Connecting pipe

6 Hand-tighten the flare nuts to make sure that they do not become stripped.

Liquid service port <High pressure>

Gas service port <Low pressure>

7 Torque the flare connections to the following values:

Outer diameter 1/4 inch (6.35 mm) 3/8 inch (9.52 mm) 1/2 inch (12-70 mm) 5/8 inch (15.88 mm)

Torque ft·lb (N·m) 10.113.0 (1418) 25.331-1 (3442) 36.244.8 (4961) 49.960.0 (6882)

Step 2-4 Connecting the power and communication cables
If installing a Multi-Zone Heat Pump, install as described in the installation manual supplied with the Multi-Zone Heat Pump outdoor unit.

WARNING
· Do not modify the power cable in any way. Doing so may cause electric shock or fire due to poor connection, poor insulation, or current limit override. Make sure to comply with the technical standards of electrical installations and the wiring regulations in the local area.
· This appliance must be properly grounded. Do not ground the appliance to a gas pipe, plastic water pipe, or telephone line. Failure to comply may result in electric shock, fire, and explosion.
· If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
· Make sure that cabling is not subject to wear, corrosion, excessive pressure, vibration, sharp edges, or adverse environmental effects. Take into account the effects of aging or continual vibration from sources such as compressors or fans.

1 Connect each wire to its corresponding terminal number.

Cable Power cable Communication cable

Terminals L1, L2, ground
F1, F2

CAUTION
· Tighten the flare nuts only to the specified torque. If a flare nut is overtightened, the flare face may crack, causing refrigerant leakage.
8 Do not box in or cover the pipe connections. Make sure that the connections are accessible for testing later in the installation process and for future servicing.
9 Tape over the end of the pipes so that debris will not enter the piping when it is passed through the wall. The pipes will be insulated later in the installation process.

18 English

Installation

Control box

2 Tighten the terminal block screw.
L1 L2 F1 F2

Before connecting

Correct

Upside down

Damaged

Noncircular

3 In Step 2-3, step 3 you determined the exit position for the piping bundle. If using the left, right, or bottom exits, pass the cables through the selected knockout.

After connecting

Correct (Front view)

Correct (Side view)

Upside down

Non-fitted

CAUTION
· Connect the wires firmly so that wires cannot be pulled out. Loose wires can cause the connection to overheat. Each circular terminal must match the size of its corresponding screw in the terminal block.

CAUTION
· For the terminal block wiring, use a wire with a ring terminal socket only. Regular wires without a ring terminal socket may become a hazard as the connections may loosen during operation.
· For the product that uses the R-32 refrigerant, be cautious not to generate a spark by keeping the following requirements:
– Do not remove the fuses with power on.
– Do not disconnect the power plug from the wall outlet with power on.
– It is recommended to locate the outlet in a high position. Place the cords so that they are not tangled.

NOTE · Powersupply cords of parts of appliances foroutdooruse shall
not be lighter than polychloroprene sheathed flexible cord. · Power& Communication cable shall not exceed 98.42ft(30 m).
Step 2-5 Connecting the drain hose
1 In Step 2-3, step 3 you determined the exit position for the piping bundle. If using the right, bottom, or right rear exit, change the drain hose connection from the right to the left so that the drain hose will lie along the inside of the unit and exit to the right.
Drain pan outlet Rubber cap

Installation

English 19

Indoor Unit Installation

CAUTION
· Be careful not to puncture the plug with the screwdriver when installing it.
2 If using the left, right, or bottom exit, pass the drain hose through the selected knockout.

Drain hose Refrigerant pipes Connection hose (assembly pipe)
3 Connect a 5/8-inch ID extension drain hose to the main drain hose.

CAUTION
· If the diameter of the connection hose is smaller than the product’s drain hose, leakage may occur.

Drain hose (A)

Extension drain hose (B)

4 Do not box in or cover the drain hose connection. It must be accessible for testing later in the installation process and for future servicing.
5 If the drain hose is routed inside the room, insulate the hose so that dripping condensation does not damage the furniture or floors.
Step 2-6 Taping the pipes, cables, and drain hose
1 Wrap foam insulation around the refrigerant pipes, up to the connection points. The connections must remain accessible for testing later in the installation process. Either leave slits in the insulation or do not cover the connections.
Insulation
Refrigerant pipes

1.57~1.77inch (44~45mm)

Test parts for the indoor unit

Drain hose

(A)

(B)

Extension drain hose

2 Make a piping bundle by using vinyl tape to wrap together the refrigerant pipes, power cable, communication cable, and drain hose, up to the connection points. Connection points must remain accessible for testing later in the installation process.

Vinyl tape

0.79 inch (20 mm) or more Foam insulation

Installation plate
Vinyl tape
Power and communication cables (assembly cable) Drain hose

Refrigerant pipes (assembly pipe)

20 English

Installation

Outdoor Unit Installation

If installing a Multi-Zone Heat Pump, install as described in the installation manual supplied with the Multi-Zone Heat Pump outdoor unit.

Step 3-1 Mounting the outdoor unit
To promote proper condensate draining, the recommended installation of the outdoor unit is elevated above the ground on a mounting bracket attached to a concrete pad.
In areas where snowfall occurs, the unit must be mounted above the snow line to allow for proper heating. Snow cannot be allowed to collect on top of the unit. For promoting natural drainage in a heavy snow fall area:
· Make space more 3.14 inch(80 mm) between the bottom of the outdoor unit and the ground for installation. (Ensure that the drained water runs off correctly and safely.)
· Allow enough separation distance between the product and the ground.

Snow-proof hood

3.14 inch (80 mm)

Estimated snow fall
Ground

On the ground

1 Place the outdoor unit in the selected installation location (Step 1-1 on page 8), ensuring proper clearances and with the arrow on top of the unit pointing away from the wall.
2 Clip the rubber feet to the tabs to minimize sound and vibration to the structure.

Rubber leg

Model ****009/012******
****015****** **HD018****** **PD018****** **LD018****** ****024******

X 1.98(602) 2.17(660)
2.03(620)

Unit : ft(mm) Y
1.02(310) 1.12(340)
1.18(360)

3 Level the unit, then use anchor bolts to secure it at the four mounting points.
4 For installations in locations that require seismic or hurricane tie downs, comply with local codes.
5 If the selected location is exposed to strong winds, install a protective fence around the unit so that the fan can operate correctly.
On a wall
WARNING
· The unit must be properly secured to the wall. If the unit falls, it may result in crushing, electric shock, fire, or explosion that could cause death, severe personal injury, or property damage.
1 At the selected installation location (Step 1-1 on page 8), attach the L-bracket to the wall as follows: – Install the bracket as close to the wall as possible. – Insert rubber isolators between the bracket and the wall to minimize sound and vibration to the structure. Do not fully compress the isolators.
Soft rubber designed to cut off residual vibration from outdoor unit to rack (not supplied with product) Soft rubber designed to cut off vibration from rack to wall (not supplied with product)
– Make sure that the bracket is level. – Use suitable bolts/washers and lock washers. 2 Place the outdoor unit on the bracket, ensuring proper clearances and with the arrow on top of the unit pointing away from the wall. 3 Clip the rubber feet to the tabs to minimize sound and vibration to the structure. 4 Level the unit, then use anchor bolts to secure it at the four mounting points. 5 For installations in locations that require seismic or hurricane tie downs, comply with local codes.
English 21

Installation

Outdoor Unit Installation

Step 3-2 Connecting the cables and the pipes
1 Route the piping bundle to the outdoor unit. 2 Use piping clamps to fasten the piping bundle to the
foundation or wall. 3 Cut the refrigerant pipes to the length needed to reach
the pipe connections (located behind the cover panel; see the figure in step 7).
Pipe cutter

Pipe

90°

Oblique

Rough

Burr

CAUTION
· Keep the piping length at a minimum to minimize the additional refrigerant charge due to piping extension. (Maximum allowable piping length: 65.62ft.(for ****009/012******) and 98.42ft. (****015/018/024******))
· When connecting the pipes, make sure that surrounding objects do not interfere with or contact them to prevent refrigerant leakage due to physical damage.
· Make sure that the spaces where the refrigerant pipes are installed comply with all national, state, and local codes and regulations.
· Be sure that the area where pipe brazing and adding additional refrigerant is well ventilated.
· Be sure that when performing brazing and mechanical connections that the refrigerant does not circulate.
· When reconnecting the pipes, make sure to perform flared-jointing newly to prevent refrigerant leakage.
· When working on the refrigerant pipes and the flexible refrigerant connectors, be careful that they are not damaged physically by surrounding objects.
6 Remove the cover panel on the unit.

4 Remove any burrs, positioning the pipe face down to make sure that the burrs do not get into the pipe.
5 Assemble the flare connections on the cut pipe ends.

D A

90°±2°
45°±2° L

Pipe

Flare

Outer diameter (D)
1/4 inch (0.35 mm)
3/8 inch (9.52 mm)
1/2 inch (12.70 mm)
5/8 inch (15.88 mm)

Depth (A)
0.051 inch (1.3 mm)
0.071 inch (1.8 mm)
0.079 inch (2.0 mm)
0.087 inch (2.2 mm)

R 0.4 to 0.8
D
Flare dimension (L)
0.34250.3583 inch (8.79.1 mm)
0.50390.5197 inch (12.813.2 mm)
0.63780.6535 inch (16.216.6 mm)
0.75980.7756 inch (19.319.7 mm)

7 Remove the service valve caps.
8 Connect the pipes to the service valve with the flare nuts. Hand-tighten the nuts to prevent stripping.

Installation

22 English

9 Torque the flare connections to the values in Step 2-3, step 7 on page 18.
10 Connect the power cables and secure with a cable clamp.

L1 L2

F1 F2

Outdoor-to-indoor power cable (three wires)

Power cable Communication cable (three wires) (two wires)

11 Connect the outdoor unit power supply cable to the preinstalled disconnect switch.

12 Leave the cover panel off for testing later in the installation process.

Installation

English 23

Installation Inspection and Testing

Step 4-1 Performing a drain leak test
1 Pour water into the drain pan.
CAUTION
· Make sure that the water does not overflow onto the electrical connection.
2 Check for leaks at the drain connection under the cover panel.

Step 4-2 Performing pressure tests using nitrogen
1 Install the red high-side hose of an R-32-gauge manifold set to the larger liquid/vapor line’s service port.
2 Attach a pressure regulator to a tank of dry nitrogen. 3 Connect the common hose of the gauge manifold set to
the pressure regulator’s hose connection. 4 Open the service port to connect the line set to the gauge
manifold set. 5 Pressurize the line set and indoor unit with dry nitrogen to
200 psig (adjust at the pressure regulator). 6 Using a soap-bubble solution suitable for refrigeration
systems, check the four flare connections for leaks.
Test parts for the indoor unit

Installation

<Front view> 3 Make sure that the hose is draining properly at the
outdoor unit.

Test parts for the indoor unit
7 Wait 10 minutes to make sure that the pressure does not drop.
8 Increase the pressure to 400 psig and repeat steps 6 and 7.
9 Increase the pressure to 600 psig and repeat steps 6 and 7.
10 A drop in pressure during steps 7 through 9 indicates a system leak in the refrigeration line set or indoor unit. Perform a thorough leak check, repair the leak(s), and then repeat this procedure.
11 Close the gauge manifold, shut off the nitrogen tank, and remove the common hose to the pressure regulator.
12 Vent the nitrogen in lines to the atmosphere to prepare for system evacuation.

24 English

CAUTION
· Leak-detection fluids are also suitable for use with most refrigerants. The use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipework.
· If a leak is suspected, all naked flames shall be removed/ extinguished.
· If leakage of refrigerant is found which requires brazing, all the refrigerants shall be recovered from the system, or isolated (using shut-off valves) in a part of the system remote from the leak.
Step 4-3 Evacuating the system
The outdoor unit is loaded with sufficient R-32 refrigerant. Do not vent R-32 into atmosphere: it is a fluorinated greenhouse gas, covered by Kyoto Protocol, with a Global Warming Potential (GWP) = 675. You should evacuate the air in the indoor unit and in the pipe. If air remains in the refrigerant pipes, it affects the compressor. It may cause reduction of cooling capacity and malfunction. Use a vacuum pump.
CAUTION
· Because the system does not have filter driers, you must perform this triple evacuation procedure to remove all noncondensables and moisture from the system before charging. Failure to do so will result in reduced performance and shorter equipment life.

8 Close the gauge manifold valve, shut off the vacuum pump, and remove the common hose.
9 Connect the hose to the nitrogen pressure regulator and bleed the hose by opening the end of the common hose closest to the manifold.
10 Open the high-pressure manifold valve and slowly bring the system pressure to atmosphere (50 kPa).
11 Close the manifold and nitrogen cylinder and remove the common hose.
12 Reconnect the common hose to the vacuum pump. Repeat steps 6 through 12, alternating between breaking the vacuum with dry nitrogen and evacuating, until system evacuation has occurred three times, to the following vacuum levels:

Evacution First
Second Third

Microns 4000 2000 500

13 After evacuating to at least 500 microns for the third time, close the gauge manifold valve and wait 10 minutes, making sure that the vacuum level in the system does not decrease. If it does, a small leak is likely. Repair the leak and repeat the evacuation process.

Installation

The time required to perform each evacuation will depend on the capacity (CFM) of the vacuum pump used.

1 Install a micron vacuum gauge to the larger liquid/vapor

line’s service port on the branch of a tee.

Valve

2 Install the red high-side hose of an R-32 gauge manifold

set to the smaller liquid/vapor line’s service port on the

run of the tee.

3 Attach a vacuum pump to the common hose of the manifold set.

4 To ensure optimal performance, verify that the vacuum pump’s oil has been changed recently.

5 With the service port closed and the manifold gauge open, start the vacuum pump and make sure that the vacuum level drops below 4000 microns (as read on the micron gauge). If it is difficult to achieve a proper vacuum, a leak in the hoses is likely. Repair the leak(s) and/ or check performance of vacuum pump, then repeat this step.

6 Open the service port to connect the system to the manifold.

7 Evacuate until 4000 microns is achieved, for at least 10 minutes.

15 minutes 4
Vacuum Pump (Backward owing prevention) Gas service port <Low pressure> 5
Liquid service port <High pressure>
English 25

Installation Inspection and Testing

Step 4-4 Adding refrigerant (if needed)
The outdoor unit is charged with sufficient R-32 refrigerant to support up to a 24.6 feet line set. For lengths greater than 24.6 feet, you must add 0.16 oz of refrigerant per foot of additional length, after the lines are evacuated.
1 Calculate the additional refrigerant required: Additional ounces of R32 = (Total line set feet -24.6) × 0.16
2 Connect the common hose of the manifold gauge set to the inverted R-32 refrigerant cylinder.
3 Place the refrigerant cylinder on a scale set to measure ounces.
4 Open the valve on the tank.
5 At the manifold connection, bleed the refrigerant to remove any air that may be present in the common hose.
6 Open the gauge manifold and charge the system with the amount of refrigerant calculated in step 1.
7 Close the gauge manifold valve, close the valve on the refrigerant tank, and remove the common hose.
Precautions on adding R-32 refrigerant
In addition to the conventional charging procedure, the following requirements shall be kept. · Make sure that contamination by other refrigerants
does not occur for charging. · To minimize the amount of refrigerant, keep the hoses
and lines as short as possible. · The cylinders shall be kept upright. · Make sure that the refrigeration system is earthed
before charging. · Label the system with the final system charge with
indelible ink. · Extreme care is required not to overcharge the system. · If the system must be evacuated for any reason, before
recharging system tightness must be checked with nitrogen. · After charging, check for leakage before commissioning. · Be sure to check for leakage before leaving the work area.

CAUTION
Please fill in the following with indelible ink on the refrigerant charge label supplied with this product and on this manual.
– the factory refrigerant charge of the product, – the additional refrigerant amount charged in
the field and
– + the total refrigerant charge. on the refrigerant charge label supplied with the product.

Unit , a , b +, c

kg (oz)

NOTE
a Factory refrigerant charge of the product: see unit name plate
b Additional refrigerant amount charged in the field (Refer to the above information for the quantity of refrigerant replenishment.)
c Total refrigerant charge d Refrigerant cylinder and manifold for charging

Installation

26 English

CAUTION
· Make sure that the total refrigerant charge does not exceed (A), the maximum refrigerant charge, which is calculated in the following formula: Maximum refrigerant charge (A)= factory refrigerant charge (B) + maximum additional refrigerant charge due to piping extension (C)
· The table below shows the refrigerant charge limits for each product.

Model ****009****** ****012******
**HD015******
**LD015****** **PD015****** **HD018****** **LD018****** **PD018****** ****024******

A 2.54 (40.65) 3.28 (52.47)
4.05 (64.81)
5.15 (82.45)

B
2.13 (34.04)
2.54 (40.57)

[Unit:lb (oz)] C
0.41 (6.61)
0.74 (11.90)

3.31 (52.91)

0.74 (11.90)

4.41 (70.55)

0.74 (11.90)

Step 4-5 Preparing the system for commissioning

1 Wrap the remaining refrigerant pipe lengths and connection points with foam insulation.
2 Wrap the unwrapped portions of the piping bundle with vinyl tape.
3 With the manifold gauge set still installed, open the isolation valves on the outdoor unit to connect the outdoor unit to the line set and indoor unit.
4 Remove the manifold set and vacuum gage.

Step 4-6 Commissioning the unit
The unit is commissioned using the Smart Install feature. Smart Install can be started only with the remote control. While Smart Install is running, you cannot operate the remote control.

1 Make sure that the Mini-Split is in standby status (powered up with the controller in off mode).
2 Hold down the (Power), (Dry), and (Max) buttons on the remote control simultaneously for 5 seconds.
3 Wait until Smart Install succeeds or fails (approximately 7 to 13 minutes).
– While Smart Install is running:

Type

Display

Indoor unit indicator

The progress is displayed as a number between 0 and 99 on the indoor unit display.

– When Smart Install succeeds: Smart Install ends with a ringing sound, and the Mini-Split returns to standby status.
– When Smart Install fails: An error message is displayed on the indoor unit display, and Smart Install ends. To correct the problem, see the error table on page 28.

Installation

English 27

Installation Inspection and Testing

Error indicator Display
,
, ,

Error

Measures for the installer to take

Communication error between indoor and outdoor units Error on indoor temperature sensor Error on indoor heat exchanger
Error on indoor fan motor

· Check the cables between the indoor and outdoor units. See if the power cable or communication cable is crossed.
· Make sure that the indoor temperature sensor is properly connected.
· Make sure that the evaporator temperature sensor is properly connected.
· Make sure that the evaporator motor is properly connected to the board.
· Check for a foreign substance inside the unit that may be preventing the blower wheel from turning.

EEPROM/Option error

· Reset the option codes.

Refrigerant flow blocking error
Lack of refrigerant (for inverter models only)

· Make sure that the service valves are completely open. · Check for any blockage in the refrigerant pipe that
connects the indoor and outdoor units.
· Check for refrigerant leaks. · Check the cables between the indoor and outdoor units.
See if the power cable or communication cable is crossed.
· Make sure a sufficient amount of refrigerant has been added for a pipe that is longer than 24.60ft (7.5 m).
· Check for refrigerant leaks between the valve and pipe connection.

Step 4-7 Performing final checks and trial operation
WARNING
Stop the unit, disconnect the power, and contact Lennox technical support if any of the following occurs: · The unit produces a burning smell or smoke. · The power cable is hot or damaged. · The unit is very noisy. · Any foreign substance, such as water, has entered the
appliance. · The appliance becomes flooded.

1 Check the following:
– Strength of the installation site – Tightness of pipe connection to detect gas leak – Electric wiring connection – Heat-resistant insulation of the pipe – Drainage – Grounding conductor connection – Correct operation (Take the following steps.) 2 Press the (Power) button on the remote control to check the following:
– The indicator on the indoor unit lights up. – The airflow blade opens and the fan energizes for
operation. 3 Press the (Mode) button to select Cool or Heat mode.
Then take the following sub-steps:
– In Cool mode, use the Temperature button to set the set temperature to 61 (16 )

28 English

Installation

– In Heat mode, use the Temperature button to set the set temperature to 86 (30 )
– Check whether, approximately 3 to 5 minutes later, the outdoor unit starts, and a cool or warm air blows out.
– After 12 minutes of stationary condition, check the indoor unit air treatment.
4 Press the Fan (Fan) button to check whether the airflow blades work properly.
5 Press the (Power) button to stop the trial operation.
Pumping down for removing the product
Pump-down is an operation intended to collect all the system refrigerant in the outdoor unit. This operation must be carried out before disconnecting the refrigerant tubing in order to avoid refrigerant loss to the atmosphere.
WARNING
· After installing the product, be sure to perform leak tests on the piping connections. After pumping down refrigerant to inspect or relocate the outdoor unit, be sure to stop the compressor and then remove the connected pipes. – Do not operate the compressor while a valve is open due to refrigerant leakage from a pipe or an unconnected or incorrectly connected pipe. Failure to do so may cause air to flow into the compressor and too a high pressure to develop inside the refrigerant circuit, leading to an explosion or product malfunction.
1 Hold down the (Power) button on the indoor unit for 5 seconds. Beep sounds immediately to indicate that the product is ready for pump down procedure.
2 Let the compressor run for more than 5 minutes. 3 Release the valve caps on High and Low pressure side. 4 Use L-wrench to close the valve on the high pressure side. 5 After approximately 1 minute, close the valve on the low
pressure side. 6 Stop operation of the Mini-Split by pressing the
(Power) button on the indoor unit or remote control. 7 Disconnect the pipes.
CAUTION
· Compressor damage may occur if the compressor is run at a negative suction pressure.

1 1 minute

Liquid service port <High pressure>

Gas service port <Low pressure>

Off

Installation

English 29

Setting the installation options

Setting the installation options
This product has installation options depending on the user’s installation environment. Even after the product ships, it is possible to input option changes to the indoor unit using the transmission packet of the remote control. This chapter provides a method for setting the installation options.
STEP 1. Common steps for setting the options

1 Enter the mode for setting the options: a Connect the remote control by using the USB port (C-Type) at the bottom of the remote control.
b Press and hold the and button simultaneously for 5 seconds. (After connecting
the remote control, press the and button within 10 seconds.) c Make sure the remote control display shown as

Power button
Option button Temperature/ Fan speed button

Mode button WindFree button
Max button

NOTE · The remote control display and buttons may vary
depending on the model.

d When setting the option code, press the next button within 5 seconds so that the setting is not interrupted.
2 Set the option values

CAUTION
· The total number of available options are 24: SEG1 to SEG24.
· Because SEG1, SEG7, SEG13, and SEG19 are the page options used by the previous remote control models, the modes to set values for these options are skipped automatically.
· Set a 2-digit value for each option pair in the following order: SEG2 and SEG3 SEG4 and SEG5 SEG6 and SEG8 SEG9 and SEG10 SEG11 and SEG12 SEG14 and SEG15 SEG16 and SEG17 SEG18 and SEG20 SEG21 and SEG22 SEG23 and SEG24

SEG1 0
SEG7 1
SEG13 2
SEG19 3

SEG2 X
SEG8 X
SEG14 X
SEG20 X

SEG3 X
SEG9 X
SEG15 X
SEG21 X

SEG4 X
SEG10 X
SEG16 X
SEG22 X

SEG5 X
SEG11 X
SEG17 X
SEG23 X

SEG6 X
SEG12 X
SEG18 X
SEG24 X

Installation

30 English

Example Option code : 013FC5-10B22A-271E00-371020 13-FC-50-B2-2A-71-E0-07-10-20

Take the steps presented in the following table:

Steps
1 Setting SEG 2 Press the Temp Fan button to set the display panel to 1. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.

Remote control display

2 Setting SEG 3 Press the Temp Fan button to set the display panel to 3. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.

3 Press the button to set next options.

4 Setting SEG 4 Press the Temp Fan button to set the display panel to F. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
5 Setting SEG 5 Press the Temp Fan button to set the display panel to C. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
6 Press the button to set next options.

Installation

7 Setting SEG 6 Press the Temp Fan button to set the display panel to 5. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
8 Setting SEG 8 Press the Temp Fan button to set the display panel to 0. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.

English 31

Setting the installation options
Steps 9 Press the button to set next options.

Remote control display

10 Setting SEG 9 Press the Temp Fan button to set the display panel to B. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
11 Setting SEG 10 Press the Temp Fan button to set the display panel to 2. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
12 Press the button to set next options.

Installation

13 Setting SEG 11 Press the Temp Fan button to set the display panel to 2. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
14 Setting SEG 12 Press the Temp Fan button to set the display panel to A. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
15 Press the button to set next options.

16 Setting SEG 14 Press the Temp Fan button to set the display panel to 7.
Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
32 English

Steps 17 Setting SEG 15
Press the Temp Fan button to set the display panel to 1. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
18 Press the button to set next options.

Remote control display

19 Setting SEG 16 Press the Temp Fan button to set the display panel to E. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
20 Setting SEG 17 Press the Temp Fan button to set the display panel to 0. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
21 Press the button to set next options.

22 Setting SEG 18 Press the Temp Fan button to set the display panel to 0. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
23 Setting SEG 20 Press the Temp Fan button to set the display panel to 7. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.

Installation

English 33

Setting the installation options
Steps 24 Press the button to set next options.

Remote control display

25 Setting SEG 21 Press the Temp Fan button to set the display panel to 1. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
26 Setting SEG 22 Press the Temp Fan button to set the display panel to 0. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
27 Press the button to set next options.

28 Setting SEG 23 Press the Temp Fan button to set the display panel to 2. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.
29 Setting SEG 24 Press the Temp Fan button to set the display panel to 0. Every time you press the Temp Fan button, the display panel reads 0 1 2 3 ··· 9 A B C D E F repeatedly.

Installation

34 English

3 Upon completion of the selection, check you made right selections.

Press the button to set the display part and check the display part. The display part shows like below when each time you press the button.

[SEG2,SEG3] [SEG4,SEG5] [SEG6,SEG8] [SEG9,SEG10] [SEG11,SEG12] [SEG14,SEG15] [SEG16,SEG17] [SEG18,SEG20] [SEG21,SEG22] [SEG23,SEG24]

4 Press the button.

5 When pressing the (Power) button with the direction of the remote control for the sound `’Ding” or “Dinging” is

heard, then the input of the option is completed. (If the dinging sound isn’t heard, try pressing the again.)

(Power) button

Installation

English 35

Setting the installation options
STEP 2. Setting the installation options in a batch
Installation option no. for an indoor unit : 02XXXX-1XXXXX-2XXXXX-3XXXXX The installation option can be set at the factory differently depending on the function of each model. Various option items of each address assigned within the installation option are shown in the following table. · Among the values expressed in each address, “Reserved” cannot be changed because it means no options are
configurable, or a unique function for the model is already assigned. The options SEG4, SEG5, SEG8, SEG14, SEG15, SEG17, SEG18, and SEG20 can be changed to reflect the present installation conditions, if needed. Before changing the options, make sure that the power is supplied to the indoor unit. If the indoor unit is not
plugged in, it must include a power supply so that the remote control’s option transmission packet can be input to the indoor unit. When changing the options according to the installation environment, there are two methods: changing 24 digits in a batch and changing the options individually. To change in a batch, you must first know the entire 24-digit installation options of the model from the service manual. Set the installation options of indoor units by following the steps in STEP 1. Common steps for setting the options on page 27 after determining the specific address segment values required to change the installation options. If you do not know the entire installation options, refer to the following section STEP 3. Changing the options individually on page 35. Description of option segments with changeable values SEG4 : set for using “Indoor external temperature sensor” or “fan Thermo off control” (Fan thermo off control only: 1, external sensor only: 6, using both: 7)
CAUTION
· “Fan Thermo Off control” is only available for an indoor unit for Multi-Zone Heat Pump. When “Fan Thermo Off control” is matched with a Single Zone High-Wall system , the setting cannot be made using this option. But you can set this option by referring to the following section STEP 3. Changing the options individually on page 35.
SEG5 : To use a central controller, enter 1. SEG8 : To use an external drain pump, enter 8.
NOTE · If the SEG8 is set to ‘Use’, the SEG14-External Contact Control will be set to DISABLE automatically. SEG14 : As an External Contact Control option, check the installation site and then select the appropriate option.
NOTE · If SEG14 is not set to ‘default’, SEG8-the external drain pump will not to be available. SEG15 : Set an output option according to external control (Thermo on – 0, Operation on – 1) SEG17 : Control the received sound tone of the remote control of the indoor unit. (Buzzer use – 0, disuse -1) SEG18 : Change the filter usage time of the indoor unit (500HR – 1, 1000HR – 2) SEG20: Set this option to control an indoor unit using a specific remote control.
36 English

Installation

Option Function
Indication and details Option
Function Indication
and details Option Function
Indication and details
Option Function Indication
and details

SEG1

SEG2

Page

Mode

Indication Details Indication Details

–

Installation

–

SEG7 Page Indication Details
1
SEG13

SEG8

Use of drain pump

Indication

Details

Factory set

Disuse

Use

external

drain

pump

SEG14

Page

Use of external control

Indication Details Indication 0 1

Details
Disuse On/Off control

Factory set

Indication 0

Off control

Window

On/Off

control

Reverse

control

On/off &

Reverse

control

Off &

Reverse

control

Window

on/off &

Reverse

control

SEG19

SEG20

Page

Wireless controller address

Indication Details Indication

Details

Factory set

0 or 1

Indoor 1

Indoor 2

Indoor 3

Indoor 4

SEG3
Reserved
SEG9
Reserved
SEG15 Setting the output of external control
Details Thermo on Operation on Use (Operating heater Fan on) + Disuse Emergency Heat Use (Operating heater Fan off) + Disuse Emergency Heat Use (Operating heater Fan on/ Defrosting Fan off) + Disuse Emergency Heat Use (Operating heater Fan on) + Use Emergency Heat Use (Operating heater Fan off) + Use Emergency Heat Use (Operating heater Fan on/Defrosting Fan off) + Use Emergency Heat SEG21
Reserved

Factory set
0

SEG4

Use of external room temperature sensor /
Fan Thermo Off control

Indication

Details

Factory set

Disuse

Use/Disuse

Disuse/Use

Use/Use

SEG10

Reserved

SEG16

Reserved

SEG22 Reserved

SEG5

Use of central control

Indication

Details

Factory set

Disuse

use

SEG11

Reserved

SEG17

Buzzer control (Receiving tone of indoor unit)

Indication

Details

Factory set

Use

Disuse

–

SEG23

Reserved

SEG6

Reserved

SEG12

Reserved

SEG18

Use Time of Filter

Indication Details

Disuse

Factory set

500HR

1000HR

–

SEG24

Reserved

Installation

English 37

Setting the installation options

Installation option no. for an indoor unit : 05XXXX-100000-200000-300000

Option

SEG1

SEG2

Function

Page

Mode

Indication Details Indication Details

Indication and

details

Installation Option 2

Option Function
Indication and details
Option Function
Indication and details
Option Function Indication and details

SEG7 Page Indication Details
1 SEG13 Page Indication Details
2 SEG19 Page Indication Details
3

SEG8 Reserved SEG14 Reserved SEG20 Reserved

SEG3 (*1)

Auxiliary heater offset temp. and time delay

Indication

Details

Factory set

temperature No delay

offset

temperature

minutes

offset

temperature

minutes

offset

2.7°F(1.5°C) No delay

2.7°F(1.5°C)

minutes

2.7°F(1.5°C)

minutes

5.4°F(3°C) No delay

5.4°F(3°C)

minutes

5.4°F(3°C)

minutes

8.1°F(4.5°C) No delay

8.1°F(4.5°C)

minutes

8.1°F(4.5°C)

minutes

10.8°F(6°C) No delay

10.8°F(6°C)

minutes

10.8°F(6°C)

minutes

SEG9

SEG4 (*2)

Maximum outdoor temperature for auxiliary heater use

Indication

Details

Factory set

Disuse

65°F 1
(18.3°C)

60°F 2
(15.6°C)

55°F 3
(12.8°C)

50°F 4
(10°C)

45°F 5
(7.2°C)

40°F

(4.4°C)

35°F 7
(1.7°C)

30°F 8
(-1.1°C)

25°F 9
(-3.9°C)

20°F A
(-6.7°C)

15°F B
(-9.4°C)

10°F C
(-12.2°C)

5°F D
(-15°C)

0°F E
(-17.8°C)

SEG10

SEG5 (*3)

External heat compressor lockout temperature

Indication Details

Factory set

Disuse

45°F 1
(7.2°C)

40°F 2
(4.4°C)

35°F 3
(1.7°C)

30°F 4
(-1.1°C)

25°F 5
(-3.9°C)

20°F

(-6.7°C)

15°F 7
(-9.4°C)

10°F 8
(-12.2°C)

5°F 9
(-15°C)

0°F A
(-17.8°C)

-5°F B
(-20.6°C)

-10°F C
(-23°C)

-15°F D
(-26°C)

-20°F E
(-29°C)

SEG11

SEG6

Auto mode manual fan speed control / Motion Detect Sensor (MDS) UX

Indication

Details

Factory set

Disable

Enable/ 1
Disable

Disable 2
/Enable

Enable

–

SEG12

Reserved

SEG15

SEG16

SEG17

SEG18

Reserved

SEG21 Reserved

SEG22 Reserved

SEG23 Reserved

SEG24 Reserved

Installation

38 English

WARNING
· Ensure that the external heater connected to a Lennox indoor unit is equipped with an overheating prevention system and meets the UL 1996 standard.
· The external heater must be set so that it does not operate if the indoor unit malfunctions and appropriate airflow is impossible.
· If the indoor unit has a problem and its fan is not working, and the external heater is operating without an overheating prevention system, it may result in a fire, property damage and/or personal injury.
· Installing an external heater without following the instructions provided by the manufacturer may result in electric shock, fire, property damage and/or personal injury.
(*1) Defines the offset temperature for external heater ON/OFF controls. / Time Delay for heater operation Example 1) Selecting option 2 will set to 0 (0) offset temperature. / Time Delay for heater operation is 20 minutes. Thermo ON: Heater operates when room temperature is set temperature + T (Thermal Compensation) 0 (0) and 20 minutes have passed. Thermo off: Heater stops when room temperature is > set temperature + T (Thermal Compensation) 0 (0) + 1.8 (1). Example 2) Selecting option 4 will set to 2.7°F (1.5°C) offset temperature. / Time Delay for heater operation is 10 minutes. Thermo on: Heater operates when room temperature is set temperature + T (Thermal Compensation) 2.7°F (1.5°C) and 10 minutes have passed. Thermo off: Heater stops when room temperature is > set temperature + T (Thermal Compensation) 2.7 (1.5) + 1.8 (1).
(*2) EH Lockout, restrict heating output above the set outdoor temperature. Restriction is lifted below [set temperature 3.6 (2)] Example 1) Selecting option 3 will restrict heating operation when the outdoor temperature is is 55 (12.8) or above. Restriction is lifted when outdoor temperature falls below 51 (10.8).
(*3) HP Lockout, SET Thermo off process below the set outdoor temperature. Restriction is lifted above [set temperature +3.6 (2)] Example 1) Selecting option 3 will SET Thermo off when the outdoor temperature is is 35(1.7) or below. Restriction is lifted when outdoor temperature rises above 39(3.7). Set HP Lockout temperature is adjusted to 5.08 (20.6) if the HP Lockout temperature is equal or higher than EH Lockout.
English 39

Installation

Setting the installation options

STEP 3. Changing the options individually
When you want to change the value of a specific option, refer to the following table and follow the steps in STEP 1. Common steps for setting the options on page 29. (Enter the set address of the installation option to change in SEG4 and SEG5 in the table below, enter the change option value in SEG6. The values of SEG1, SEG2, SEG3, and SEG4 are always 0, D, 2 in the same order as in the following table. )

Option

SEG1

SEG2

SEG3

SEG4

SEG5

Function

Page

Mode

Option mode to change

Tens position of the option number

Units position of the option number

Indication and details

Indication Details 0

Indication

Details

Indication

Details

Indication
Tens position
value

Details 0 to 9

Indication
Units position
value

Example: Changing the Buzzer control (SEG17) option of the installation options to 1 (disuse).

Details 0 to 9

SEG6

New value

Indication Details

New value

0 to F

Option Function Indication

SEG1 Page
0

SEG2 Mode
D

SEG3
Option mode to change
2

SEG4
Tens position of the option number
1

SEG5
Units position of the option number
7

SEG6 New value
1

NOTE · How to set the thermo off option for a Single Zone High-Wall system is shown in the following option table:

Option Function Indication

SEG1 Page
0

SEG2 Mode
D

SEG3
Option mode to change
1

SEG4
Tens position of the option number
2

SEG5
Units position of the option number
4

SEG6 New value
F

Installation

40 English

Maintenance Procedures

Repair
Performing the gas leak tests
In case of repair of the refrigerant circuit, the following procedure must be kept to consider flammability. 1 Remove the refrigerant. 2 Flush the system with nitrogen blowing for safety 3 Repeat the previous step several times until no refrigerant is
within the system 4 Perform the repair work 5 Conduct a pressure test 6 Purge the refrigerant circuit with inert gas 7 Perform vacuuming 8 Charge with refrigerant 9 Perform a leak test 10 Perform a second leak test within one month
CAUTION
· Compressed air or oxygen shall not be used. · Flush the system with nitrogen blowing, fill the refrigerant
until the working pressure is reached, ventilate to the atmosphere, and then pull down to a vacuum state. · For the final nitrogen blowing charge, the system shall be ventilated down to the atmosphere pressure. · The procedure is vital in case of brazing on the piping. · Make sure that the outlet of the vacuum pump is not closed to any ignition sources and there is ventilation available. · Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the Mini-Split.
Component checking
· Sealed electrical equipment shall be replaced. · Particular attention shall be paid to the following to
ensure safety while working on electrical components: – The casing shall not be modified because it can
affect the level of protection. The corresponding modifications include damage to cables and seals, excessive number of connections, terminals that do not comply with original specifications, incorrect fitting of glands, etc. – Ensure that the apparatus is mounted securely. – Ensure that seals or sealing materials have not degraded to prevent the ingress of flammable atmospheres. – Replacement parts shall be following the manufacturer’s specifications. · Intrinsically safe components must be replaced.

Decommissioning
The following requirements must be fulfilled before and while taking the decommissioning procedure:
· Only qualified, licensed professionals shall perform refrigerant recovery and decommissioning. Before decommissioning, the worker shall become familiar with the product.
· The entire refrigerant shall be recovered safely. · Before starting the process, oil and refrigerant samples
shall be taken just in case analysis is required for reuse.
· Before starting the process, a power supply must be available.
1 Be familiar with the equipment details.
2 Isolate the system electrically.
3 Before starting the process, make sure that:
· Any mechanical equipment is available for handling refrigerant cylinders.
· All PPE (personal protective equipment) is available for servicing.
· The recovery process shall be supervised by a competent person.
· The recovery equipment and cylinders comply with the standards.
4 Pump down the refrigeration system, if possible.
5 If vacuuming is not possible, make a manifold so that refrigerant can be easily removed from the parts of the system.
6 Make sure that the cylinders are placed on the scales before recovery.
7 Run the recovery system following the manufacturer’s instructions.
8 Do not overcharge the cylinders. (No more than 80 %)
9 Be sure to keep the cylinder within the maximum working pressure, even temporarily.
10 After charging, make sure that the cylinders and the equipment are promptly removed from the site and all isolation valves are closed.
11 Recovered refrigerant shall not be charged into another refrigeration system unless it is cleaned and checked.
12 After decommissioning, the system shall be labeled stating that it has been decommissioned. The label shall be dated and signed.
13 Ensure that there are labels on the equipment indicating the equipment contains flammable refrigerant.

English 41

Installation

Sub PCB installation (optional accessory)

(Wired remote controller, central remote controller etc.)
1 Turn the power off and take off the cover panel of the indoor unit.

4 Find the PCB wire, and connect the wire to the Sub PCB as seen in the picture.

2 Attach the Sub PCB to the Sub PCB case. 3 Assemble the Sub PCB case to the indoor unit.

5 Connect the wire(remote controller, central remote controller etc) to the Sub PCB.
6 Assemble the PCB Cover and the front panel.
If the Sub PCB is not installed, arrange the wire for multi system (connection) as shown in the illustration.

Sub PCB case Sub PCB

Wire for multi system connection
NOTE · The Sub PCB is connected for controlling the system
using a wired remote controller, and/or a centralized remote controller.

Installation

42 English

Documents / Resources

LENNOX MWPD High Efficiency Mini Split [pdf] Installation Guide
24Y AR9500T R32, MWPD High Efficiency Mini Split, High Efficiency Mini Split, Efficiency Mini Split, Mini Split

References

User Manual

LENNOX MWPD High Efficiency Mini Split

Product Specifications

Safety Information

Installation

Indoor Unit Installation

Outdoor Unit Installation

Installation Inspection and Testing

Maintenance Procedures

Setting the Installation Options

FAQs

Documents / Resources

References

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