Before operating, servicing, or wiring the unit, carefully read
and comply with the safety information provided in the manual.
Ensure that all power sources are disconnected before servicing or
installing the unit to prevent property damage, personal injury, or
death.

2. Inspection:

Prior to installation, inspect the evaporator coils for any
visible damage or defects. Do not proceed with installation if any
issues are identified.

3. Installation Preparation:

Prepare for installation by reviewing local and national
building codes. Ensure compliance with regulations to prevent
damage to property, product, or personal injury.

4. Condensate Drain Preparation:

Set up the condensate drain system according to manufacturer
guidelines to ensure proper drainage and functioning of the
unit.

5. Coil Installation:

Follow the specific installation instructions provided for
vertical upflow/downflow or horizontal installation based on your
setup.

6. Suction Line Connection:

Connect the suction line following manufacturer specifications
to maintain proper refrigerant flow.

7. Metering Devices/Liquid Line Connection:

Install metering devices like Flowrator Coils or TXV Coils as
instructed. Connect the liquid line accurately for efficient
cooling.

8. Leak Check:

Perform a thorough leak check after installation to ensure there
are no refrigerant leaks that could impact performance.

9. System Charging:

Charge the system with refrigerant following recommended
guidelines to achieve optimal performance.

10. Coil Cleaning Instructions:

Regularly clean the coils as per the provided cleaning
instructions to maintain efficiency and prolong the lifespan of the
unit.

FAQ:

Q: Can children operate this appliance?

A: This appliance is not intended for use by persons, including
children, with reduced capabilities unless supervised by a
responsible individual knowledgeable about its operation and safety
precautions.

Q: What should I do if I detect a refrigerant leak?

A: If you suspect a refrigerant leak, immediately turn off the
unit and contact a certified technician for inspection and repairs
to prevent any safety hazards or damage.

View Fullscreen

A1
CASED & UNCASED
COILS

INSTALLATION GUIDE & OPERATION MANUAL
A1 REFRIGERANT CASED & UNCASED EVAPORATOR COILS
CONTENTS
1. Important Safety Instructions 2. Inspection 3. Codes & Regulations 4. Installation Preparation 5. Condensate Drain Preparation 6. Coil Installation
6A. Vertical Upflow/Downflow Installation 6B. Horizontal Installation 7. Suction Line Connection 8. Metering Devices/Liquid Line Connection 8A. Flowrator Coils 8B. TXV Coils 9. Leak Check 10. System Charging 11. Coil Cleaning Instructions

373 Atascocita Rd.,

Humble, TX 77396

Phone: 800.423.9007

Fax: 281.441.6510

www.aspenmfg.com

IO-A1-000-REVA | CA-CC-CE-CM-DA-DC-DE-DM

1. IMPORTANT SAFETY INSTRUCTION
Potential safety hazards are alerted using the following symbols. The symbol is used in conjunction with terms that indicate the intensity of the hazard. It is the responsibility of the owner and the installer to read and comply with the safety information and the instructions accompanying these symbols.
Read the precautions in this manual carefully before operating the unit.
Read the instructions in this manual carefully before operating the unit.
Read the instructions in this manual carefully before servicing the unit.
Read the instructions in this manual carefully before wiring the unit.
Warning or Caution

This symbol indicates a potentially hazardous

WARNING

situation, which if not avoided, could result in serious injury, property damage, product

damage or death.

This symbol indicates a potentially hazardous
CAUTION situation, which if not avoided, may result
in moderate injury or property damage.

Certified technicians or those individuals
WARNING meeting the requirements specified by NATE
may use this information. Property and product damage or personal injury hazard may occur without such background.
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 use of the appliance by a person responsible for their safety. Children must be supervised to ensure that they do not play with the appliance.
Product designed and manufactured to permit installation in accordance with local and national building codes. It is the installer’s responsibility to ensure that the product is installed in strict compliance with the aforementioned codes. Manufacturer assumes no responsibility for damage (personal, product or property) caused due to installations violating regulations.

Disconnect ALL power before servicing or
WARNING installing this unit. Multiple power sources
may be present. Failure to do so may cause
property damage, personal injury, or death.

WARNING Do not bypass safety devices.

Do not use means to accelerate the
WARNING defrosting process or to clean, other than
those recommended by the manufacturer.
The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater). Do not pierce or burn.
Be aware that refrigerants may not contain an odor.

If any hot work is to be conducted on the
WARNING refrigerating equipment or any associated
parts, appropriate fire extinguishing equipment shall be available to hand. Have a dry powder or CO2 fire extinguisher adjacent to the charging area.

This appliance is not intended for use at altitudes exceeding 2,000 meters.
2. INSPECTION
On receiving the product, visually inspect it for any major shipping related damages. Shipping damages are the carrier’s responsibility. Inspect the product labels to verify the model number and options are in accordance with your order. The manufacturer will not accept damage claims for incorrectly shipped product.
Product design for use with A1 refrigerant are marked with R410A refrigerant specified on the nameplate.
3. CODES & REGULATIONS
This product is designed and manufactured to comply with national codes. The product shall be installed in accordance with national wiring regulations. It is the responsibility of the installer to follow such codes and / or prevailing local codes / regulations. Compliance with national gas regulations shall be observed. The manufacturer assumes no responsibility for equipment installed in violation of any codes or regulations.
4. INSTALLATION PREPARATION
Read all the instructions in this guideline carefully while paying special attention to the WARNING and CAUTION alerts. If any of the instructions are unclear, clarify with a certified technician before proceeding. Gather all tools needed for successful installation of the unit prior to beginning the installation.

NOTICE

Absence of pressure/charge does not verify a leak. Check coils for leaks prior to installation.

Assure that the maximum operating pressure is considered when connecting any evaporator unit or condenser unit.
Refer to Section 10 of this manual for refrigerant charging instructions.

PARTIAL UNITS shall only be connected
WARNING to an appliance suitable for the same
refrigerant.

This product family Models DA/DC/DE/DM are PARTIAL UNIT AIR CONDITIONERS, complying with PARTIAL UNIT requirements of UL 60335-2-40 Standard, and must only be connected to other units that have been confirmed as complying to corresponding PARTIAL UNIT requirements of this Standard (UL 60335-2-40).
The appliance shall be installed in accordance with national regulations. This product was tested at an external static pressure of 0.66″ W.C. None of the components in this product family are designed or approved to be suitable for outdoor use.
Refrigerant lines must be routed to allow the minimum required clearance of 24″ for service. Consult all appropriate regulatory codes prior to determining final clearances.
5. CONDENSATE DRAIN PREPARATION
Aspen recommends an auxiliary drain pan be provided and installed by the installing contractor, which should be properly sloped, installed according to code, and terminated in an area

IO-A1-000-REVA | CA-CC-CE-CM-DA-DC-DE-DM

visible to the homeowner. The auxiliary pans provide extra protection to the area under the unit should the primary and secondary drain plug up and overflow.
As expressed in our product warranty; ASPEN
WARNING WILL NOT BE BILLED FOR ANY STRUCTURAL
DAMAGES CAUSE BY FAILURE TO FOLLOW THIS INSTALLATION REQUIREMENT.

Drain lines from the auxiliary drain pan should
CAUTION NOT be connected to the primary drain line of
the coil.

Do NOT install coils with standard temperature
WARNING drain pan with oil furnaces or applications where
temperature of the drain pan might exceed 290 °F. A metal pan should be installed. Failure to follow this warning may result in property damage and/or personal injury.

Install coils with the drain pan and/or casing on a flat, level surface. Slope the coil 1/4″ towards the drain. Condensate lines must be installed in accordance with building codes. It is the contractor’s responsibility to ensure proper condensate drainage at the time of the installation; Aspen bears no responsibility
for damages caused by improper condensate management.

CAUTION

Some coils have primary and secondary drain ports on both sides of the pan to offer installation

flexibility, so ensure all threaded plugs are in present and tightened in any

unused drain ports. These may be hidden behind the coil casing access

door. Failure to do so may result in property water damage; it is the contrac-

tor’s responsibility to ensure these plugs are present and tight.

The drain lines must be installed with ¼” per foot pitch to provide free drainage. A condensate trap MUST be installed on the primary drain line to ensure proper drainage of the condensate. The trap must be installed in the drain line below the bottom of the drain pan. Fig.5-1 illustrates the typical drain trap installation. Prior to installation, ensure drain pan hole
is not obstructed. Additionally, Aspen recommends the drain lines be insulated to prevent sweating and dripping.

FIGURE 5.1 – TYPICAL DRAIN LINE TRAP SETUP

CAUTION

Use Teflon tape to connect the drain lines to the threads in the drain pan. DO NOT USE SOLVENT BASED PIPE DOPE. THIS WILL REDUCE THE LIFE OF THE PAN.

The drain pan has primary (white) and secondary (red) drain connections. If a secondary drain line is required, it should be run separately from the primary and should terminate in
a highly visible location. Condensate disposal through the
secondary drain line indicates that the primary drain line is
plugged and needs cleaning. If a secondary drain line will not be provided, plug the secondary drain. Drain plugs are NOT

to be reused without plumbers’ tape or putty. Drain line connection should be finger tightened, then turned no more than one complete turn as needed to ensure a firm connection. DO NOT over-tighten connection or damage may occur.
6. COIL INSTALLATION

WARNING

The coil is manufactured with dry nitrogen precharge. Release the pressure through the Schrader

valve test port prior to installation. If holding pressure is not present,

return coil to distributor for exchange.

NOTICE

Refrigerant tubing must be routed to allow accessibility for service and maintenance of the unit.

Pipe-work including piping material, pipe routing, and installation shall include protection from physical damage in operation and service, and be in compliance 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. All field joints shall be accessible for inspection prior to being covered or enclosed. After completion of field piping for split systems, the field pipework shall be pressure tested with an inert gas and then vacuum tested prior to refrigerant charging, according to the following requirements:
The minimum test pressure for the low side of the system shall be the low side design pressure and the minimum test pressure for the high side of the system shall be the high side design pressure, unless the high side of the system, cannot be isolated from the low side of the system in which case the entire system shall be pressure tested to the low side design pressure.
Field-made refrigerant joints indoors shall be tightness tested. The test method shall have a sensitivity of 5 grams per year of refrigerant or better under a pressure of at least 0.25 times the maximum allowable pressure. No leak shall be detected. REFER TO SECTION 10 FOR SYSTEM CHARGING INSTRUCTIONS.
Clean coil fins with degreasing agent or mild detergent and rinse fins clean prior to installation. Refer to Section 10 of this manual for coil cleaning / maintenance guidance.
The refrigerant line sizes should be selected according to the
recommendations of the outdoor unit manufacturer.
Care must be taken to ensure all connection joints are burr-free and clean. Failure to do so may increase chances of a leak. It
is recommended to use a pipe cutter to remove the spun closed
end of the suction line.
To reduce air leakage, rubber grommets may be present where the lines pass through the coil case. To avoid damage, remove grommets prior to brazing by sliding over the lines. Use a quenching cloth or allow the lines to cool before reinstalling the grommets.
Use of wet rags/quenching cloth is highly recommended to prevent weld-related damage to the casing and Schrader valve (if present).

Can be installed in either an upflow or a downflow application.

CAUTION

Coil should be installed on the discharge side of the furnace.

CAUTION

Aspen coils may include a Schrader valve on the suction manifold. Ensure that the Schrader valve

and valve core (where present) are protected from heat to prevent leakage.

IO-A1-000-REVA | CA-CC-CE-CM-DA-DC-DE-DM

WARNING

As mentioned elsewhere in this document, in an application involving oil furnace a metal drain

pan MUST be used. Coils installed on an oil furnace must have a mini-

mum of six inches clearance between the top of the furnace and bottom

of the drain pan.

CAUTION

Multi-position Coils are shipped from the factory for specific horizontal applications (horizontal

right or horizontal left). Installer must ensure that the coil is installed in

the orientation for which it was intended (horizontal drain pan side down).

Failure to follow these instructions might lead to property and equipment

damage.

6A. VERTICAL UPFLOW/DOWNFLOW INSTALLATION (DA, DC, DE)

CAUTION

When installing in conjunction with a gas furnace in a vertical orientation, ensure that there is 2″

gap between the bottom of the drain pan and the outlet of the furnace.

To set up coils for downflow application, refer to Table 6.1, below for the appropriate Downflow Kit.

TABLE 6.1

DOWNFLOW KIT SERIES

MODEL

CABINET WIDTH

(C,D)A/C/E

24A/B/C/D

130-175

(C,D)A/C/E

30A/B/C/D/E

130-175

DWNFLWM-16

(C,D)A/C/E

36A/B/C/D/E/F

130-175

(C,D)A/C/E

42A/B/C/D

160-175

(C,D)A/C/E

48A/B/C/D

160-175

DOWNFLOW KIT SERIES

MODEL

CABINET WIDTH

DWNFLWM-18

(C,D)A/C/E

60C/D

195-245

PRO-COILS WITH PLASTIC DRAIN PAN

DOWNFLOW KIT SERIES

MODEL

CABINET WIDTH

(C,D)A/C/E

ALL

(C,D)A/C/E

ALL

(C,D)A/C/E

ALL

DWNFLWP-175

(C,D)A/C/E

ALL

(C,D)A/C/E

ALL

(C,D)A/C/E

ALL

COILS WITH PLASTIC DRAIN PAN

DOWNFLOW KIT SERIES

MODEL

CABINET WIDTH

(C,D)A/C/E

24A/B/C/D

130-210

(C,D)A/C/E

30A/B/C/D/E

130-210

(C,D)A/C/E

36A/B/C/D/E/F

130-210

(C,D)A/C/E

42A/B/C/D

160-245

(C,D)A/C/E

48A/B/C/D

160-245

(C,D)A/C/E

60A/B

160-245

DWNFLWP

SERIES

MODEL

CABINET WIDTH

(C,D)A/C/E

24A/B/C/D

195-210

(C,D)A/C/E

30A/B/C/D/E

195-210

(C,D)A/C/E

36A/B/C/D/E/F

195-210

(C,D)A/C/E

42A/B/C/D

195-245

(C,D)A/C/E

48A/B/C/D

195-245

(C,D)A/C/E

60A/B

195-245

Follow the installation instructions included with the DOWNFLOW KIT.

The DM coils are supplied with a kit. Install the two 3″ wide by 16″ long galvanized metal plates on the outside of the coil, against the fins on each side of the coil as shown in Fig. 6A-3. Do NOT exceed 350 cfm/ton of airflow for downflow applications.
Counterflow Application
FIGURE 6A-3 – METAL PLATE LOCATION FOR A DOWNFLOW / COUNTERFLOW APPLICATION

FIGURE 6A-1.

FIGURE 6A-2.

UPFLOW APPLICATION DOWNFLOW APPLICATION

To position the coil on furnace:

1. Locate the air outlet of the furnace.

2. Adjust flanges accordingly and position the coil over or under the furnace outlet

3. Place ductwork over the casing.
Refer to Furnace/Air Handler manufacturer literature for specific coil installation guidelines and recommendations.

When installing uncased coil on top of furnace
NOTICE a field fabricated 2.0″ to 6.0″ spacer (placed
between the furnace exit and the inlet of the evaporator) should be installed.

6B. HORIZONTAL INSTALLATION (DE ONLY)
Multi-position coils are shipped from the factory such that they can be installed in both vertical and horizontal applications without changes to the coil. When installing these coils in the horizontal application, the details mentioned in this section must be followed.
Multi-position coils come equipped with a horizontal drain pan (Plastic/Metal). The plastic drain pan is protected from high temperatures by a metal plate at the apex end of the coil.

FIGURE 6B-1.

FIGURE 6B-2.

HORIZONTAL

LEFT APPLICATION

RIGHT APPLICATION

Refer to Furnace/Air Handler manufacturer literature for specific coil

installation guidelines and recommendations.

IO-A1-000-REVA | CA-CC-CE-CM-DA-DC-DE-DM

CAUTION

Due to higher designed radiant heat, a field fabricated 6.0″ spacer (placed between the furnace

exit and the inlet of the evaporator) should be installed when matching

up an Aspen coil with an ultra-low NOx (ULN) furnace.

7. SUCTION LINE CONNECTION

WARNING

The sensing bulb and TXV body MUST be protected from overheating during brazing. The

sensing bulb and TXV body must be covered using a quench cloth or wet

cloth when brazing. Pointing the brazing flame away from the valve and

sensing bulb provide partial protection only.

CAUTION

Aspen coils may include a Schrader valve on the suction manifold. Ensure that the Schrader valve

and valve core (where present) are protected from heat to prevent leakage.

1. Ensure suction line connection joints are burr-free and clean. Failure to do so may increase chances of a leak and introduce contaminants to the system. It is recommended to use a pipe cutter to remove the spun closed
end of the suction line.
2. Swage (or use a field supplied coupler) and braze the field supplied refrigerant suction line tubing to the coil stub using approved industry practices.

WARNING

Do not attempt to touch brazed joints while hot. Severe burns may result.

8. METERING DEVICES/LIQUID LINE CONNECTION
Aspen coils are available with two kinds of metering devices a) flowrator or b) TXV. The following instructions are separated into sections by metering device
8A. FLOWRATOR COILS

FIGURE 8A-1. FLOWRATOR ASSEMBLY COMPONENTS

CAUTION

Use Piston sizes recommended by the outdoor unit manufacturer whenever possible. The piston should be sized according to the capacity of the outdoor unit.

Failure to install the proper piston can lead to poor
WARNING system performance and possible compressor
damage.

IO-A1-000-REVA | CA-CC-CE-CM-DA-DC-DE-DM

I. INSTALLATION
NOTE: Photos are for basic illustration / reference purposes only. Actual equipment configuration may differ from that shown.

O-ring

I-1. Disassemble flowrator body using two wrenches and unscrewing with a counterclockwise motion.
I-2. Replace the Teflon O-ring (located between the halves). Discard Schrader if present.

CAUTION

Be aware of the Teflon O-ring. Be sure to replace the O-ring to attain a proper seal.
(The Teflon O-ring is located between the two halves of the flowrater).

I-3. Slide the attachment nut onto the liquid line stub out.
I-4. Braze the stub-out portion to the liquid line and let cool.

O-ring

I-5. Taking care that the white Teflon seal is still in place inside the flowrater body, firmly seat the stub and screw the attachment
nut to flowrater body.

I-6. Tighten nut using no more than 10 ft-lbs of torque. A flare nut open end wrench is recommended to evenly distribute the force across all six sides of the nut to ensure piston body is not
deformed.

II. PISTON REPLACEMENT

NOTE: Photos are for basic illustration / reference purposes only. Actual equipment configuration may differ from that shown. FIGURE 7A-2

During some installations, a piston change may be required. If so, the installer MUST change the piston. Use piston sizes recommended by the outdoor unit manufacturer. If a sizing chart
is not available, use the piston size chart provided below to size the required piston. The size of the piston is stamped on the piston body (Fig 7A-2).
Use the chart below when matching coil with an outdoor unit with a different nominal capacity than the coil.

OUTDOOR UNIT CAPACITY

R410A ORIFICE SIZE

12,000

N/A

18,000 24,000

0.049 0.055

30,000

0.059

36,000

0.068

42,000

0.074

48,000

0.080

60,000

0.089

II-1. Evacuate the system as per manufacturer guidelines and recommendations.
II-2. Turn the 13/16″ nut once to release any residual pressure in the coil.
II-3. After ensuring that the coil is free of any residual pressure, disassemble the flowrater body completely using two wrenches. Take great care not to distort the feeder tubes. The wrench used to clasp the nut should be turned in counterclockwise direction to unscrew the nut.
II-4. Slide the 13/16″ nut over the line-set and separate the two halves of the flowrater.

II-5. Pull the piston out using a small wire or pick. Verify the piston size (size is typically stamped on the body of the piston – Fig 7.6). If a different piston size is required by the outdoor unit manufacturer, replace
the piston using the small wire provided with the piston kit.
II-6. Replace the piston with one of the correct size. Do not
force the new piston into the body. Make sure the piston
moves freely in body.

Pay close attention to the piston orientation.
CAUTION The pointed end of the piston MUST go into
the distributor body, towards the coil. Failure
to ensure this orientation will cause the piston to be bypassed during
operation which might damage the outdoor unit.

II-7. Assemble the two halves correctly and ensure that the Teflon O-ring is present between the two halves (See I-5). Slide the 13/16″ nut onto the distributor body.

CAUTION

Be aware of the Teflon O-ring. Be sure to replace the O-ring to attain a proper seal.
(The Teflon O-ring is located between the two halves of the flowrater).

II-8. Tighten the nut to a torque of approximately 10 ft-lbs. Do NOT over-tighten the nut. Over-tightening could crack the nut and/or impede the piston movement during operation. II-9. If present, slide the rubber grommet back to position to
prevent air leakage.
8B. TXV COILS

FIGURE 8B-1. COMPONENTS OF A TYPICAL TXV ASSEMBLY

WARNING

The sensing bulb and TXV body MUST be protected from overheating during brazing. The sensing

bulb and TXV body must be covered using a quench cloth or wet cloth

when brazing. Pointing the brazing flame away from the valve and sens-

ing bulb provide partial protection only.

The valves should be sized according to the

WARNING

capacity of the outdoor unit. Failure to install the right valve can lead to poor performance

and possible compressor damage.

I. TXV Bulb Horizontal Mounting

The orientation and location of the TXV bulb has a major influence on the system performance.

Ensure that the TXV bulb is in direct contact
CAUTION with the suction/vapor line. Gap between the
bulb and tube should be avoided. Failure to
do so will impair the proper functioning of the TXV valve.

It is recommended that the TXV bulb be installed parallel to the ground (on a horizontal plane). The bulb position should be at 2 o’clock or 10 o’clock. Fig. 7B-2 shows the recommended position for the TXV bulb installation in the
horizontal plane.

BULB POSITION AT 2 O’CLOCK OR 10 O’CLOCK

FIGURE 8B-2 – RECOMMENDED LOCATION FOR HORIZONTAL TXV BULB MOUNT
The TXV sensing bulb SHOULD be mounted on the suction line approximately 6″ from the TXV or coil housing using the metal clamp provided. In order to obtain a good temperature reading and correct superheat control, the TXV sensing bulb must conform to ALL of the following criteria:
1. The sensing bulb MUST be in direct and continuous contact with the suction line.
2. The sensing bulb should be mounted horizontally on the suction line.
3. The sensing bulb MUST be mounted at the 2 o’clock or 10 o’clock position on the circumference of the suction line.
4. The sensing bulb MUST be insulated from outside air.
A properly mounted sensing bulb will prevent false readings caused by liquid refrigerant that may have formed inside the suction/vapor line. Insulation will protect the sensing bulb from false readings due to contact with warm air.

IO-A1-000-REVA | CA-CC-CE-CM-DA-DC-DE-DM

II. TXV Bulb Vertical Mounting

FIGURE 7B-3 – RECOMMENDED As recommended in Section

LOCATION FOR VERTICAL TXV BULB MOUNT

7B-I, the TXV sensing bulb should be mounted in a hori-

zontal plane in relation to the

suction/vapor line. However,

some installation configura-

tions may require that the

sensing bulb be mounted ver-

tically. In this instance, place

the bulb opposite the piping

wall being hit by refrigerant

and oil leaving the distributor

tubes, and with capillary tubes

directed upwards as shown in

Fig. 7B-3.

If the TXV sensing bulb is mounted vertically;
CAUTION the capillary MUST be directed upwards. The
bulb must be mounted on the wall opposite to that being directly hit by the refrigerant and oil leaving the distributor tubes.
III. Field-Installed TXV Retrofit
Note: Photos are for basic illustration purposes only. Actual equipment configuration may differ from that shown.

WARNING

Do not attempt to touch brazed joints while hot. Severe burns may result.

When installing an expansion valve, it is not necessary to slide the coil out of the housing.

III-1. Disassemble the flowrater body using two wrenches. Unscrew the body with a counter-clockwise motion.

III-2. Remove the existing flowrator piston using a small wire or pick.

O-ring

III-6. After ensuring that the Teflon O-ring seal is still in place inside the flowrater body, screw the female swivel nut onto the
flowrater body.

III-7. Slide attachment the nut onto the liquid line stub out (See Section 8.1.1, I-3, Fig. 8.4)

III-8. Braze the stub-out portion to the liquid line and let cool.

O-ring

III-9. Remove the additional Teflon O-ring seal from the box and place on the shoulder just
inside the TXV inlet port. Screw the nut attached to the stub-out portion of the flowrater body onto
the inlet port of the TXV.

III-10. Tighten all connections taking care to use proper back up. Tighten the nut to a torque of approximately 10-30 ft-lbs.
III-11. Remove the valve identification sticker from the valve and place it adjacent to the Aspen model number on unit name plate.
III-12A. Some Aspen coils come with a Schrader valve on the suction line. If a Schrader port is present:
A. Remove the valve stem from the Schrader port mounted on the suction line.

B. Screw flare nut on TXV equalization tube on to the Schrader valve stem.

III-3. Replace the Teflon O-ring
seal in place (located between the halves).

III-4. Inspect the TXV box to confirm that the valve is compatible with the refrigerant in the system.

Male (Inlet)

Female
(Outlet) III-5. Remove the valve from the
box and note the location of the inlet side (threaded male port) and the outlet side (female swivel nut port).

When handling or manipulating the equalizer
CAUTION tube, take great care not to kink or make
extreme bends in the tubing.
Using a non-bleed expansion valve may
CAUTION require the use of a hard-start kit. Follow the
outdoor unit manufacturer’s guidelines.
9. LEAK CHECK
1. Following outdoor unit manufacturer instructions and recommendations, charge the system with dry nitrogen to a maximum pressure of 150 PSIG.
2. Check all brazed and screw-on line connections by applying a soap solution to the joint. A leak will produce bubbles in the soap solution.

IO-A1-000-REVA | CA-CC-CE-CM-DA-DC-DE-DM

3. If any leaks are discovered, remove nitrogen pressure and repair leaks. Repeat steps 1-3.
4. With no leaks or weak connections present, evacuate the system and charge as per the outdoor unit manufacturer instructions and specifications.
10. SYSTEM CHARGING

WARNING

Units designed for use with R410a refrigerant MUST be charged with R410a refrigerant.

An improperly charged system will likely
CAUTION cause loss in system performance and may
damage the compressor.

CAUTION

Refer to outdoor unit manufacturer charging guidelines and recommendations. The recommendations

given below are general in nature and are NOT to supersede outdoor unit

manufacturer specifications.

Piston / Fixed Orifice coil:

Add refrigerant until the superheat measured at the outdoor unit suction/vapor line matches the superheat recommendations of the outdoor manufacturer. If this information is not supplied
in the outdoor manufacturer’s instruction manual use the superheat from the chart below as a reference.

Outdoor Temp

Superheat

°F D.B.

Min.

Nom.

Max.

100

TXV Coils:

If the unit is equipped with a fixed TXV, add refrigerant until the subcooling measures at the outdoor unit liquid line matches the subcooling recommendations of the outdoor manufacturer. If the charge is unavailable charge
the unit to a subcooling value of 8°F +/- 1°F.

When adjusting the TXV, the valve stem or
NOTICE adjusting screw should not be adjusted more
than a ¼ turn at a time. To adjust superheat, turn the valve stem clockwise to increase and counterclockwise to decrease.

1. If subcooling and superheat are low, adjust TXV to 8°F +/- 1°F superheat, then check subcooling.
2. If subcooling is low and superheat is high, add charge to raise subcooling to 8°F +/- 1°F then check superheat.
3. If subcooling and superheat are high, adjust TXV valve to 8°F +/- 1°F superheat, then check subcooling.
4. If subcooling is high and superheat is low, adjust TXV valve to 8°F +/- 1°F superheat and remove charge to lower the subcooling to 8°F +/- 1°F.

The TXV should NOT be adjusted at light load / ambient conditions of 60°F or below.
11. COIL CLEANING INSTRUCTIONS
Do not use means to accelerate the defrosting
WARNING process or to clean, other than those recom-
mended by the manufacture.
Aspen cased coils are equipped with a two-piece panel door to allow for cleaning and maintenance access. Remove one or both doors to access the coil for cleaning.
For both copper and aluminum tube coils, it is recommended to flush with the coil with water. There are coil cleaners that are available that contain corrosive chemicals, such as, but not limited to, chlorine and hydroxide, that are not approved for use on Aspen copper and aluminum tube coils.

IO-A1-000-REVA | CA-CC-CE-CM-DA-DC-DE-DM

Scan QR Code to visit Aspen’s website

373 Atascocita Rd., Humble, TX 77396 Phone: 281.441.6500
Toll Free: 800.423.9007 Fax: 281.441.6510
www.aspenmfg.com

Revised 05/2025. Subject to change without notice and without incurring obligation. IO-A1-000-REVA | CA-CC-CE-CM-DA-DC-DE-DM

Documents / Resources

ASPEN A1 CC Series Cased Upflow Downflow Coils [pdf] Instruction Manual
A1 CC Series Cased Upflow Downflow Coils, A1, CC Series Cased Upflow Downflow Coils, Cased Upflow Downflow Coils, Upflow Downflow Coils, Downflow Coils

References

User Manual

ASPEN A1 CC Series Cased Upflow Downflow Coils Instruction Manual

A1 CC Series Cased Upflow Downflow Coils

Product Information: A1 Refrigerant Cased & Uncased
Evaporator Coils

Specifications:

Product Usage Instructions:

1. Important Safety Instructions:

2. Inspection:

3. Installation Preparation:

4. Condensate Drain Preparation:

5. Coil Installation:

6. Suction Line Connection:

7. Metering Devices/Liquid Line Connection:

8. Leak Check:

9. System Charging:

10. Coil Cleaning Instructions:

FAQ:

Q: Can children operate this appliance?

Q: What should I do if I detect a refrigerant leak?

Documents / Resources

References

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