GREE Vireo Gen3 Single-Zone, Heat Pump System

Table of Contents

This document outlines the installation process for the GREE Vireo Gen3 Single-Zone Heat Pump System. Key sections include:

1. Explanation of Symbols
2. Safety Precautions
3. Parts Identification
4. Installation Notice and Location Selection
5. Outdoor Unit Installation Steps
6. Pipe and Wire Connections
7. Test and Operation
8. Configuration of Connection Pipe
9. Limited Warranty Statement
10. Contact Information

Explanation of Symbols and Clauses

Explanation of Symbols:

• ⚠️ WARNING: This symbol indicates the possibility of death or serious injury.
• ⚠️ CAUTION: This symbol indicates the possibility of injury or damage to property.
• ℹ️ NOTICE: Indicates important but not hazard-related information, used to indicate risk of property damage.

Exception Clauses:

The manufacturer will not be responsible for personal injury or property loss caused by:

1. Improper use or misuse of the product.
2. Altering, changing, maintaining, or using the product with other equipment without following the manufacturer's instructions.
3. Product defects directly caused by corrosive gas.
4. Defects due to improper operation or handling during transportation.
5. Operating, repairing, or maintaining the unit without following the instruction manual or related regulations.
6. Problems or disputes caused by the quality or performance of parts and components produced by other manufacturers.
7. Damage caused by natural disasters, hazardous environments, or force majeure.

If you need to install, move, or maintain this air conditioner, please use a licensed HVAC dealer to avoid serious damage or personal injury or death. Handling refrigerant leaks or discharging requires certified professionals in compliance with local laws and regulations. This equipment 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 by a responsible person. Children should be supervised to ensure they do not play with the equipment.

Safety Precautions

Installation

⚠️ WARNING:

• Installation or maintenance must be performed by qualified professionals.
• The equipment shall be installed in accordance with local and national wiring codes.
• All wiring, circuit breakers, and disconnects must comply with code.
• All wiring of indoor and outdoor units should be connected by licensed professionals.
• Disconnect the power supply before proceeding with any work related to electricity and safety.
• All power and control wiring must conform to the air conditioner's specifications and local codes. Unstable power supply or incorrect wiring may result in electrical shock, fire hazard, or unit malfunction.
• Grounding of units must comply with the National Electrical Code and local codes.
• The air conditioner should be properly grounded; incorrect grounding may cause electrical shock.
• Do not connect power before finishing installation.
• To prevent malfunctions, install a properly sized circuit breaker.
• An all-pole disconnect switch with a contact separation of at least 3mm in all poles should be installed in fixed wiring.
• Circuit breakers must be properly sized to the unit specifications and code to prevent electrical overload or short-circuit.

Installation (Continued)

⚠️ CAUTION:

• Instructions for installation and use are provided by the manufacturer.
• Select a location out of reach for children and far from animals or plants. If unavoidable, install a fence for safety.
• The indoor unit should be installed close to an outside wall.
• Wire to code (see submittals).
• Power and control wiring from the outdoor unit to the indoor unit must be continuous.
• A circuit breaker must be installed in the line.
• The yellow-green wire is the ground wire and cannot be used for any other purpose.
• This air conditioner is a first-class electric equipment and must be properly grounded to code. Improper grounding could cause electrical shock.
• The refrigerant circuit temperature will be hot; keep the interconnection cable away from copper tubing.

Operation and Maintenance

⚠️ WARNING:

• This equipment can be used by children aged 8 years and above and persons with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, if they have been given supervision or instruction concerning safe use and hazards.
• Children shall not play with the equipment.
• Cleaning and user maintenance shall not be made by children without supervision.
• If the supply wiring is damaged, it must be replaced by a licensed HVAC technician or other licensed electrical professional.
• Connect the air conditioner to a dedicated circuit breaker.
• Disconnect power supply when cleaning the air conditioner to avoid electrical shock.
• Do not wash the equipment with water to avoid electrical shock.
• Do not spray water on the indoor unit to avoid electrical shock or unit malfunction.
• Do not repair the air conditioner yourself, as this may cause electrical shock or damage. Contact a licensed HVAC contractor.
• To avoid injury, do not touch fins when removing the filter.
• Do not extend fingers or objects into the air inlet or air outlet, as this may cause personal injury or damage.

Operation and Maintenance (Continued)

⚠️ CAUTION:

• To avoid damaging the remote controller, do not spill water on it.
• To avoid damage when drying the air filter, do not use a flame or hair dryer.
• Do not block the air outlet or air inlet, as this may cause the unit to malfunction.
• Do not step on or place heavy objects on the top panel of the outdoor unit, as this may damage the unit or cause personal injury.
• If any of the following occur, turn off the air conditioner, disconnect power immediately, and contact the dealer or a qualified professional for service:
  • Wiring is overheating or damaged.
  • Abnormal sounds during operation.
  • Circuit breaker trips off frequently.
  • A burning smell coming from the air conditioner.
  • Indoor unit is leaking.

Parts Name

Outdoor Unit

Diagram of an outdoor unit showing an 'air inlet' on the left side and an 'air outlet' on the right side.

NOTE

Actual product may be different from the graphics shown; please refer to the actual product.

Installation Notice and Location Selection

Installation Notice

Safety Precautions for Installing and Relocating the Unit:

To ensure safety, please be mindful of the following precautions.

⚠️ WARNING:

• When installing or relocating the unit, ensure the refrigerant circuit is free from air or substances other than the specified refrigerant. Any foreign substance can cause system pressure rise or compressor rupture, resulting in injury.
• When installing or moving this unit, do not charge it with refrigerant not compliant with the nameplate or unqualified refrigerant. This may cause abnormal operation, malfunction, or serious accidents.
• When refrigerant needs to be recovered during relocation or repair, ensure the unit is running in cooling mode. Fully close the high-pressure (liquid) valve, wait 30-40 seconds, then fully close the low-pressure (gas) valve. Immediately stop the unit and disconnect power. Refrigerant recovery should not exceed 1 minute. If it takes too long, air may be sucked in, causing pressure rise or compressor rupture.
• During refrigerant recovery, ensure both valves are fully closed and power is disconnected before detaching the connection pipe. If the compressor starts while a stop valve is open and the connection pipe is not attached, air may be sucked in, causing pressure rise or compressor rupture.
• When installing the unit, ensure the connection pipe is securely connected before the compressor starts running. If the compressor starts while a stop valve is open and the connection pipe is not attached, air may be sucked in, causing pressure rise or compressor rupture.
• Do not install the unit where corrosive or flammable gas may leak, as this could cause an explosion or other accidents.
• Do not use extension cords for electrical connections. If the electric wire is not long enough, contact an authorized service center for a proper electric wire. Poor connections can lead to electric shock or fire.
• Use specified wire types for electrical connections between indoor and outdoor units. Firmly clamp wires to prevent external stress on terminals. Wires with insufficient capacity, wrong connections, or insecure terminals can cause electric shock or fire.

Tools for Installation

1. Level meter
2. Screw driver
3. Impact drill
4. Drill head
5. Pipe expander
6. Torque wrench
7. Open-end wrench
8. Pipe cutter
9. Leak detector
10. Vacuum pump
11. Pressure meter
12. Universal meter
13. Inner hexagon spanner
14. Measuring tape

NOTICE: Please contact the local agent for installation. Do not use unqualified power cord.

Selection of Installation Location

Basic Requirement

Installing the unit in the following places may cause malfunction. If unavoidable, consult the local dealer:

1. Places with strong heat sources, vapors, flammable or explosive gas, or volatile objects.
2. Places with high-frequency devices (e.g., welding machines, medical equipment).
3. Places near the coast.
4. Places with oil or fumes in the air.
5. Places with sulfureted gas.
6. Other places with special circumstances.
7. The equipment shall not be installed in a laundry room.
8. Not allowed on unstable or motive base structures (e.g., trucks) or in corrosive environments (e.g., chemical factories).

Outdoor Unit Location

1. Select a location where noise and outflow air from the outdoor unit will not affect neighbors.
2. The location should be well-ventilated and dry, and the outdoor unit should not be exposed directly to sunlight or strong wind.
3. The location must be able to withstand the weight of the outdoor unit.
4. Ensure installation follows the requirements of the installation dimension diagram.
5. Select a location out of reach for children and far from animals or plants. If unavoidable, add a fence for safety.

Safety Precautions for Installation

1. Follow electric safety regulations when installing the unit.
2. Use a qualified power supply circuit and air switch according to local safety regulations.
3. Ensure the power supply matches the air conditioner's requirements. Unstable power supply or incorrect wiring can cause malfunction. Install proper power supply cables before use.
4. Properly connect the live, neutral, and ground wires of the power socket.
5. Cut off the power supply before performing any work related to electricity and safety.
6. Do not turn on the power before finishing installation.
7. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent, or similarly qualified persons to avoid a hazard.

Requirements for Electric Connection

1. The refrigerant circuit temperature will be high; keep the interconnection cable away from the copper tube.
2. The equipment shall be installed in accordance with national wiring regulations.

Grounding Requirement

1. The air conditioner is a first-class electric equipment and must be properly grounded with a specialized grounding device by a professional. Ensure it is always grounded effectively to prevent electric shock.
2. The yellow-green wire in the air conditioner is the grounding wire and cannot be used for other purposes.
3. Grounding resistance should comply with national electric safety regulations.
4. The equipment must be positioned so that the disconnect is accessible.
5. An all-pole disconnection switch with a contact separation of at least 3mm in all poles should be connected in fixed wiring.

Installation of Outdoor Unit

Step 1: Fix the support of outdoor unit

(Select it according to the actual installation situation)

1. Select installation location according to the house structure.
2. Fix the support of outdoor unit on the selected location with expansion screws.

Diagram showing the outdoor unit support being fixed to a wall with expansion screws.

Step 2: Install drain joint (only for some models)

1. Connect the outdoor drain joint into the hole on the chassis, as shown in the picture.
2. Connect the drain hose into the drain vent.

Diagram showing the connection of the drain joint and drain hose to the outdoor unit chassis.

NOTICE: As for the shape of the drainage joint, please refer to the current product. Do not install the drainage joint in severe cold areas, as it may freeze and cause malfunction.

Step 3: Fix outdoor unit

1. Place the outdoor unit on the support.
2. Fix the foot holes of the outdoor unit with bolts.

Diagram illustrating the outdoor unit being placed on its support and secured with bolts through its foot holes. Shows the unit positioned at least 3cm above the floor.

NOTICE:

• Take sufficient protective measures when installing the outdoor unit.
• Make sure the support can withstand at least four times the unit's weight.
• The outdoor unit should be installed at least 1-1/4 inches above the floor to install the drain joint. For models with a heating tube, the installation height should be no less than 8 inches.
• For units with cooling capacity of 9000-12000 Btu, 6 expansion screws are needed; for 24000-30000 Btu, 8 screws are needed; for 36000+ Btu, 10 screws are needed.

Step 4: Connect indoor and outdoor pipes

1. Remove the screw on the right handle of the outdoor unit and then remove the handle.
2. Remove the screw cap of the valve and aim the pipe joint at the bellmouth of the pipe.
3. Pretighten the union nut by hand.

Diagram showing the removal of a handle on the outdoor unit, followed by removing a valve screw cap and aligning the pipe joint. Another diagram shows pretightening a union nut on the pipe joint.

Pipe and Wire Connections

Step 5: Connect outdoor electric wire

1. Remove the wire clip; connect the power connection wire and signal control wire (only for cooling and heating units) to the wiring terminal according to the color; fix them with screws.

Diagrams showing wiring terminals for 09K/12K and 18K/24K models, illustrating connections for N(1), L1, L2, and power wires, with color coding (white/blue, black/brown, red, green/yellow-green).

NOTICE: The wiring board is for reference only; please refer to the actual one.

2. Fix the power connection wire and signal control wire with a wire clip (only for cooling and heating units).

NOTICE: After tightening the screw, pull the power cord slightly to check if it is firm. Never cut the power connection wire to prolong or shorten the distance.

Step 6: Pipe Neatly

1. The pipes should be placed along the wall, bent reasonably, and hidden if possible. The minimum bending radius is 4 inches.
2. If the outdoor unit is higher than the wall hole, a U-shaped curve must be made in the pipe before it enters the room to prevent rain from getting into the room.

Diagram showing pipes routed along a wall with a U-shaped curve near the wall penetration to prevent water entry. Also shows a drain hose.

NOTICE:

• The through-wall height of the drain hose should not be higher than the outlet pipe hole of the indoor unit. [❌ The drain hose can't raise upwards.]
• The water outlet cannot be placed in water to drain smoothly. [❌ The water outlet can't be placed in water.]
• Slant the drain hose slightly downwards. The drain hose should not be curved, raised, or fluctuant. [❌ The drain hose can't be fluctuant.] [❌ The water outlet can't be fluctuant.]

Tightening Torque for Union Nut

Test and Operation

Use Vacuum Pump

1. Remove the valve caps on the liquid valve and gas valve, and the nut of the refrigerant charging vent.
2. Connect the charging hose of the gauges to the refrigerant charging vent of the gas valve, then connect the other charging hose to the vacuum pump.
3. Open the gauges completely and operate for 10-15 minutes to check if the pressure gauge remains at -15 psi.
4. Close the vacuum pump and maintain this status for 1-2 minutes to check if the pressure gauge remains at -15 psi. If the pressure decreases, there may be a leak.
5. Remove the gauges. Open the valve core of the liquid valve and gas valve completely with an inner hexagon spanner.
6. Tighten the screw caps of the valves and the refrigerant charging vent.
7. Reinstall the handle.

Diagram illustrating the connection of gauges, vacuum pump, and charging hoses to the liquid and gas valves of the air conditioner system.

Leak Detection

1. With a leak detector: Check for leaks.
2. With soap water: If a leak detector is not available, use soapy water. Apply soapy water at the suspected position and wait for more than 3 minutes. If air bubbles emerge, there is a leak.

Check after Installation

Check according to the following requirements after finishing installation:

Test Operation

1. Preparation of test operation:
   • The client approves the air conditioner.
   • Specify the important notes for the air conditioner to the client.
2. Method of test operation:
   • Connect the power, then press the ON/OFF button on the remote controller to start operation.
   • Press the MODE button to select AUTO, COOL, DRY, FAN, and HEAT to check if the operation is normal.
   • If the ambient temperature is lower than 16°C (61°F), the air conditioner cannot start cooling.

Configuration of Connection Pipe

1. Standard length of connection pipe: 5m, 7.5m, 8m.

2. Minimum length of connection pipe is 3m.

3. Maximum length of connection pipe is shown below:

4. Additional refrigerant oil and refrigerant charging required after prolonging connection pipe:

• After the connection pipe length is prolonged by 10m from the standard length, add 5ml of refrigerant oil for each additional 5m of connection pipe.
• Calculation method of additional refrigerant charging amount (on the basis of liquid pipe): Additional refrigerant charging amount = prolonged length of liquid pipe × additional refrigerant charging amount per meter.
• Based on the standard pipe length, add refrigerant according to the table. The additional refrigerant charging amount per meter varies with the diameter of the liquid pipe.

Additional refrigerant charging amount for R410A

Pipe expanding method

NOTICE: Improper pipe expanding is the main cause of refrigerant leaks. Please expand the pipe according to the following steps:

A: Cut the pipe

• Confirm the pipe length according to the distance between the indoor and outdoor units.
• Cut the required pipe with a pipe cutter.

Diagram illustrating pipe cutting with a pipe cutter, showing correct 90-degree cuts and indicating incorrect methods like leaning, uneven cuts, or burrs.

B: Remove the burrs

Remove the burrs with a shaper and prevent them from getting into the pipe.

Diagram showing pipe burr removal using a shaper.

C: Put on suitable insulating pipe

Diagram showing an insulating pipe being placed over the refrigerant pipe.

D: Put on the union nut

• Remove the union nut on the indoor connection pipe and outdoor valve; install the union nut on the pipe.

Diagram showing a union nut being placed onto the pipe.

E: Expand the port

Expand the port with an expander.

Diagram showing the use of an expander tool to flare the end of a pipe. Includes a note about 'A' varying by diameter.

NOTICE: "A" is different according to the diameter; please refer to the sheet below:

F: Inspection

Check the quality of the expanding port. If there is any blemish, expand the port again according to the steps above.

Working temperature range

NOTE: The operating temperature range (outdoor temperature) for cooling is -29°C(-20°F)~50°C(122°F); for heating is -30°C(-22°F)~30°C(86°F).

For Models 3VIR09HP115V1AO, 3VIR12HP115V1AO

NOTE: The operating temperature range (outdoor temperature) for cooling is -25°C(-13°F)~50°C(122°F); for heating is -30°C(-22°F)~30°C(86°F).

Limited Warranty Statement

FOR WARRANTY SERVICE OR REPAIR:

Contact your installing contractor. You may find the installer's name on the equipment or in your Owner's packet. Complete product registration below and keep on file for future reference. Warranty registration: Register your unit(s) on www.greecomfort.com, follow links to "Warranty Registration".

PRODUCT REGISTRATION

Model No.:

Serial No.:

Owner Name:

Address of Installation:

Installing Contractor:

Address:

Phone No. / E-mail:

Date of Installation:

GREE distributor (hereinafter "Company") warrants this product against failure due to defect in materials or workmanship under normal use and maintenance as follows. All warranty periods begin on the date of original installation. If the date cannot be verified, the warranty period begins one hundred twenty (120) days from date of manufacture. If a part fails due to defect during the applicable warranty period, Company will provide a new or remanufactured part, at Company's option, to replace the failed defective part at no charge for the part. This limited warranty is subject to all provisions, conditions, limitations and exclusions listed below.

• A warranty period of Five (5) years on all parts to the original registered end user.
• A warranty period of 90 days on the remote control provided with the original unit.
• A warranty period of 1 yr on all parts to the original registered commercial end user.
• Limited warranty applies only to systems that are properly installed by a state certified or licensed HVAC contractor, under applicable local and state law in accordance with all applicable building codes and permits; GREE installation and operation instructions and good trade practices.
• Warranty applies only to products remaining in their original installation location.
• Defective parts must be returned to the distributor through a registered servicing dealer for credit.

LIMITATIONS OF WARRANTIES: ALL IMPLIED WARRANTIES AND/OR CONDITIONS (INCLUDING IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR USE OR PURPOSE) ARE LIMITED TO THE DURATION OF THIS LIMITED WARRANTY. SOME STATES OR PROVINCES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY OR CONDITION LASTS, SO THE ABOVE MAY NOT APPLY TO YOU. THE EXPRESS WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR, DEALER, OR OTHER PERSON, WHATSOEVER.

THIS WARRANTY DOES NOT COVER:

1. Labor or other costs incurred for diagnosing, repairing, removing, installing, shipping, servicing, or handling of either defective parts, replacement parts, or new units.
2. Product cleaning required prior to warranty service and repair.
3. Normal maintenance as outlined in the installation and servicing instructions or Owner's Manual, including filter cleaning and/or replacement and lubrication.
4. Failure, damage, or repairs due to faulty installation, misapplication, abuse, improper servicing, unauthorized alteration, or improper operation.
5. Failure to start due to voltage conditions, blown fuses, open circuit breakers, or damages due to inadequacy or interruption of electrical service.
6. Failure or damage due to floods, winds, fires, lightning, accidents, corrosive environments (rust, etc.), or other conditions beyond the control of the Company.
7. Failure or damage of coils or piping due to corrosion on installations within one (1) mile of sea coast or corrosive body.
8. Parts not supplied or designated by Company, or damages resulting from their use.
9. Products installed outside the 48 contiguous United States, except the District of Columbia and Hawaii.
10. Electricity or fuel costs, or increases in electricity or fuel costs from any reason whatsoever, including additional or unusual use of supplemental electric heat.
11. Any cost to replace, refill, or dispose of refrigerant, including the cost of refrigerant.
12. Shipping damage or damage as a result of transporting the unit.
13. Accessories such as condensate pumps, line sets, and so forth are not covered.
14. Any special, indirect, or consequential property or commercial damage of any nature whatsoever. Some states or provinces do not allow the exclusion of incidental or consequential damages, so the above limitation may not apply to you.
15. Consumable components, such as air filters, are not covered under parts warranty.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. In jurisdictions where warranty benefits conditioned on registration are prohibited by law, registration is not required, and the STANDARD warranty period shown above will apply.

WS0003102021 DLSWARR-HP

66129937224

U.S. Contact Information

TRADEWINDS, LLC

E-mail: info@twclimate.com

Contractor Support: 888-850-7928 | Mon-Fri 8 AM - 5 PM EDT

Website: GREECOMFORT.COM