Carrier CSPVA Cased Cooling Only Evaporator Coil Installation Guide
- June 11, 2024
- Carrier
Table of Contents
CVPVA, CSPVA
Cased Cooling Only Evaporator Coil
Upflow / Downflow
Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
Safety Considerations
Improper installation, adjustment, alteration, service, maintenance, or use
can cause explosion, fire, electrical shock, or other conditions which may
cause death, personal injury or property damage. Consult a qualified
installer, service agency, or your distributor or branch for information or
assistance. The qualified installer or agency must use
factory-authorized kits or accessories when modifying this product. Refer to
the individual instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses, protective clothing, and work
gloves. Use quenching cloth for brazing operations. Have fire extinguisher
available. Read these instructions thoroughly and follow all warning or
cautions included in literature and attached to the unit. Consult local
building codes and the current editions of the National
Electrical Code (NEC) NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical Code CSA
C22.1.
Recognize safety information. When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These
words are used with the safety-alert symbol. DANGER identifies the most
serious hazards which will result in severe personal injury or death. WARNING
signifies hazards which could result in personal injury or death. CAUTION is
used to identify unsafe practices which may result in minor personal injury or
product and property damage. NOTE is used to highlight suggestions which will
result in enhanced installation, reliability, or operation.
WARNING
PROPERTY DAMAGE HAZARD — FURNACE/COIL MATCHING
Failure to follow this warning could result in property damage, personal
injury, or death.
This coil must be matched to heating equipment that meets all CSA/ANSI Z21.47
or cooling equipment that meets UL 1995 or UL 60335-2-40. Refer to the
furnace/blower installation instructions for any potential considerations when
installing coils with composite drain pans.
CAUTION
PARTIAL UNIT REQUIREMENTS
Failure to follow this warning could result in equipment damage.
This family of evaporator coils are PARTIAL UNIT AIR CONDITIONER, complying
with PARTIAL UNIT requirements of UL/CSA 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 UL/CSA 60335-2-40 Standard.
WARNING
PERSONAL INJURY / PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in property damage, personal
injury, or death.
For continued performance, reliability, and safety, the only approved
accessories and replacement parts are those specified by the equipment
manufacturer. The use of non-manufacturer approved parts and accessories could
invalidate the equipment limited warranty and result in fire risk, equipment
malfunction, and failure. Please review
manufacturer’s instructions and replacement part catalogs available from your
equipment supplier.
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Before installing, modifying or servicing system, always turn off main power
to system. There may be more than one disconnect switch. Lock out and tag
switch with a suitable warning label.
CAUTION
UNIT DAMAGE HAZARD
The coil is not approved for Heat Pump application. Unit damage may occur
WARNING
PERSONAL INJURY HAZARD
Failure to follow this caution may result in personal injury.
This coil contains Nitrogen precharge of 7 – 10 PSIG. Release this pressure
through the center of the rubber plugs before removing plugs.
WARNING
EXPLOSION HAZARD
Failure to follow this warning could result in death, serious personal injury,
and/or property damage.
Never use air or gases containing oxygen for leak testing or operating
refrigerant compressors. Pressurized mixtures of air or gases containing
oxygen can cause an explosion.
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal injury. Sheet metal
parts may have sharp edges or burrs. Use care and wear appropriate protective
clothing and gloves when handling parts.
CAUTION
UNIT OR PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
Make sure that Aluminum tubes do not come in direct contact or allow for
condensate run off with a dissimilar metal. Dissimilar metals can cause
galvanic corrosion and possible premature failure.
IMPORTANT: Nitrogen can leak out through the hole that the needle pierced
in the plugs. This does not indicate a leaking coil nor warrant return of the
coil.
IMPORTANT: Dry fit all connections to systems (electrical, drains,
refrigerant lines, flue & intake, etc.) first to verify no interferences
before final connections are made.
Introduction
Use this instruction manual to install indoor coils on upflow or downflow furnaces in cooling applications only. Do not use these coils in heat pump applications. Do not install in the horizontal position. These coils are enclosed in a painted casing, have factory-installed TXVs, and are used with Puron refrigerant R-410A systems.
Installation
These units can be installed in upflow or downflow configurations. Before
installation, there are several performance requirements that must be
considered because poor installation can negatively alter performance. This
section will briefly discuss those factors.
Airflow
Airflow amount and distribution are vital to adequate system performance.
Problems that can be experienced with incorrect airflow include:
-
low system performance
-
restricted TXV
-
frosted coil
-
poor humidity control
-
water blow-off
When attaching the coil and building the plenum, pay special attention to the effect these details will have on airflow. After system start-up, check the cfm to insure that it is correct. (Generally, the cfm should be 350 to 450 cfm/ton during normal cooling operation.)
TXV
A thermal expansion valve is utilized in this coil design to optimize performance and comfort throughout the entire operating range of the system. Special attention needs to be taken to the TXV when installing the coil (Fig. 1): -
Do not overheat valve. Temperatures that exceed 212°F (100°C) can harm valve performance. Use a wet cloth or heat sink when brazing.
-
Place liquid filter dryer near indoor unit to reduce the risk of debris clogging the valve.
-
Make sure TXV bulb is securely fastened with a metal strap and wrapped in the indentation on vapor line tube.
These specific coils have a factory-installed hard-shutoff TXV designed only
for use with R-410A refrigerant. Use only with outdoor units designed for
R-410A.
NOTE: These TXVs are factory set at approximately 10° superheat measured
at the suction service valve, and are not field adjustable.
Cabinet Sweating
If this unit is installed in a garage, attic, or other unconditioned space,
special attention needs to be given to the potential of cabinet sweating. A
6-in (152 mm) wide piece of insulation should be wrapped around the coil
casing and supply duct connection point.
Inspect Equipment
File claim with shipper if equipment is damaged.
CAUTION
ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental damage.
Federal regulations require that you do not vent refrigerant to the
atmosphere. Recover during system repair or final unit disposal.
Select Installation Procedure
NOTE: Furnace coils are not approved to be used in fan coil or “draw-
through” type applications.
To install cased coils in upflow applications, follow the instructions below
(Upflow Coil Installation on p2).
To install cased coils in downflow applications, follow the instructions
below, (Downflow Coil Installation on p5).
See Table 1 for coil connection options. Refer to instructions for placement
of coil casing on furnace.
NOTE: We recommend a 4″ transition for peak performance, but it is not
required unless stated.
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
Installing coils rotated 90° from the front of the furnace, in upflow or
downflow applications, may cause water blow-off or coil freeze-up due to the
concentration of air on one slab of the coil or lack of air to a slab of the
coil. It is required that on this type of application, a field-supplied
adapter be placed between the coil and furnace to allow air to distribute
properly between all slabs of the coil.
Installation of Evaporator Coils
Upflow Coil Installation
The cased coil is designed to fit furnaces of the same width (Fig. 2).
- Set coil in place on upflow furnace discharge air opening.
- Ensure coil is level for proper condensate drainage. Do not tip coil toward condensate drain. Coil casing does not need to be fastened or screwed to furnace.
- When installing wider coil on narrower furnace, it is recommended to use a transition adapter (Fig. 3).
NOTE: On upflow installations where the indoor coil is placed in an
unconditioned space, a 6″ wide piece of insulation should be applied and
wrapped around the outside of coil casing and supply duct contact point.
Consult the furnace installation instructions for any special requirements
when installing the coil to the furnace.
Table 1 – Coil Connections / Orientations
Model| Nom.
Tons| Line Set
Connection
Tube Size, in.| Flush Fit to
Furnace Width,
in. (mm)| Fits Next Smaller Furnace
Width| 90°
Rotation
to Furnace
(4″ Min.
Transition
Required)| 180°
Rotation
to
Furn ace
---|---|---|---|---|---|---
Suction| Liquid| Equal
Overhang| Offset
Left| Offset
Right
CSPVA2414XMC| 2| 3/4| 3/8| 14-3/16 (360)| | | | ALL
Upflow or Downflow
CVPVA1814XMC| 2.| 3/4| 3/8| 14-3/16 (360)| | |
CVPVA1917XMC| 2.| 3/4| 3/8| 17-1/2 (445)| X| X| X
CVPVA2414XMC| 2| 3/4| 3/8| 14-3/16 (360)| | |
CVPVA2417XMC| 2| 3/4| 3/8| 17-1/2 (445)| X| X| X
CVPVA2517XMC| 2| 3/4| 3/8| 17-1/2 (445)| X| X| X
CVPVA3014XMC| 3.| 3/4| 3/8| 14-3/16 (360)| | |
CVPVA3017XMC| 3.| 3/4| 3/8| 17-1/2 (445)| X| X| X
CVPVA3117XMC| 3.| 3/4| 3/8| 17-1/2 (445)| X| X| X
CVPVA3617XMC| 3| 3/4| 3/8| 17-1/2 (445)| X| X| X
CVPVA3621XMC| 3| 3/4| 3/8| 21 (533)| X| X| X
CVPVA3721XMC| 3| 3/4| 3/8| 21 (533)| X| X| X
CVPVA3817XMC| 3| 3/4| 3/8| 17-1/2 (445)| X| X| X
CVPVA4217XMC| 4.| 7/8| 3/8| 17-1/2 (445)| X| X| X
CVPVA4221XMC| 4.| 7/8| 3/8| 21 (533)| X| X| X
CVPVA4224XMC| 4.| 7/8| 3/8| 24-1/2 (622)| X| X| X
CVPVA4821XMC| 4| 7/8| 3/8| 21 (533)| X| X| X
CVPVA4824XMC| 4| 7/8| 3/8| 24-1/2 (622)| X| X| X
CVPVA4924XMC| 4| 7/8| 3/8| 24-1/2 (622)| X| X| X
CVPVA6024XMC| 5| 7/8| 3/8| 24-1/2 (622)| X| X| X
CVPVA6124XMC| 5| 7/8| 3/8| 24-1/2 (622)| X| X| X
Manufacturer reserves the right to change, at any time, specifications and
designs without notice and without obligations.
CVPVA, CSPVA: Installation Instructions
Downflow Coil Installation
NOTE: In downflow installation with a 4-way multipoise furnace, break off
perforated duct flanges on furnace. See furnace Installation Instructions.
Refrigerant Line Connections
WARNING
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal injury.
Wear eye protection. Coil is factory charged with 7–10 psi nitrogen.
The coil is under pressure and TXV screen is in place behind liquid line plug.
DO NOT remove liquid line plug first, always remove the suction line plug
first to depressurize the coil.
NOTE: Factory nitrogen charge may escape past rubber plugs during
storage. This does not indicate a leaking coil nor warrant return of the coil.
Size and install refrigerant lines according to information provided with
outdoor unit. Coil connection tube sizes are shown in Table 1. Route
refrigerant lines to the coil in a manner that will not obstruct service
access to the unit or removal of the filter.
Do not use damaged, dirty, or contaminated tubing because it may plug
refrigerant flow-control device. ALWAYS evacuate the coil and field-supplied
tubing before opening outdoor unit service valves.
Connect Refrigerant, Liquid, and Suction Lines
For matched and mismatched systems, use line sizes recommended in outdoor unit
Installation Instructions.
CAUTION
UNIT OR PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
Take precautions to ensure Aluminum tubes do not come in direct contact or
allow for condensate run off with a dissimilar metal.
Dissimilar metals can cause galvanic corrosion and possible premature failure.
The coil can be connected to outdoor units using field-supplied tubing of
refrigerant grade. Always evacuate tubing and reclaim refrigerant when making
connections or flaring tubing. Leak check connections before insulating entire
suction line.
See Table 1 for coil connection tube size.
-
Remove cabinet access door.
-
Remove rubber plugs, suction plug then liquid plug, from coil stubs using a pulling and twisting motion. Hold coil stubs steady to avoid bending or distorting.
-
Remove fitting door with rubber grommets and slide fitting door with grommets onto the refrigerant lines (field line-set), away from braze joints.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in damage.
All aluminum tubing and coils must be adequately shielded from any copper braze splatter. -
Fit refrigerant lines into coil stubs. Wrap a heat sinking material such as a wet cloth behind braze joints.
-
Wrap TXV and nearby tubing with a heat-sinking material such as a wet cloth.
-
Use 1/2 psig Nitrogen purge in the suction and out the liquid line.
-
Braze using a Sil-Fos or Phos-copper alloy. Do not use soft solder.
-
After brazing, allow joints to cool. Carefully remove TXV bulb insulation and verify that the TXV bulb is securely fastened with hose clamp. Tighten screw a half-turn past hand tight with TXV bulb placed in the indentation with full contact with the vapor line tube. Re-wrap TXV bulb with insulation.
-
Leak check connections before insulating entire suction line.
-
Slide fitting door with rubber grommets over joints. Position tubing at center of each grommet to ensure an air seal around the tube. Reinstall cabinet door.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in product damage.
To avoid valve damage to the refrigerant control device while brazing, valves
must be wrapped with a heat-sinking material such as a wet cloth.
Refrigerant Metering Device
These Coils have a factory installed hard shut-off TXV designed only for use
with R-410A refrigerant. Use only with outdoor units designed for R-410A.
NOTE: These TXVs are factory set at approximately 10° superheat measured
at the suction service valve, and are not field adjustable. These furnace
coils use an R410A TXV. The TXVs are preset at the factory and do not need
adjustment for reliable operation. Reference the outdoor unit instructions to
properly charge the unit to the correct
subcooling. Let the system stable out approximately 15 minutes after each
charge adjustment.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in product damage.
DO NOT BURY MORE THAN 36 IN. OF REFRIGERANT TUBING IN GROUND. If any section
of tubing is buried, there must be a 6-in. vertical rise to the valve
connections on the outdoor unit. If more than the recommended length is
buried, refrigerant may migrate to cooler buried section during extended
periods of unit shutdown, causing refrigerant slugging and possible compressor
damage at start-up. Condensate Drain Line Connection
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage. It is required
that all drain connections that are not being used be fitted with ¾-inch male
PVC plugs.
When installing over a finished ceiling and/or living area, install a field-
fabricated secondary condensate pan under the entire unit.
The coil is designed to dispose of accumulated water through built-in
condensate drain fittings. It is recommended that PVC fittings be used on the
condensate pan. Do not over-tighten. Finger tighten plus 1-1/2 turns. Be sure
to install PVC plugs in all unused condensate drain fittings (if not factory
supplied). Four ¾-inch female threaded pipe
connections are provided in each coil condensate pan.
It is highly RECCOMMENDED and in some locals is it a code requirement to
install a trap on the drain line(s). Please use the following guidelines to
assure proper drainage:
- Install a trap in condensate line of coil as close to the coil as possible.
- Make trap at least 3 inches (76 mm) deep and no higher than the bottom of unit condensate drain opening (Fig. 8).
- Pitch condensate line 1 inch (25.4 mm) for every 10 ft. of length to an open drain or sump.
- Make sure that the outlet of each trap is below its connection to condensate pan to prevent condensate from overflowing the drain pan.
- Prime all traps, test for leaks, and insulate traps and lines if located above a living area.
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this warning could resuproperty damage.
Provide trap with air gap in drain line wconnecting to waste (sewer)
line.
NOTE: If unit is located in or above a living space, where damage may
result from condensate overflow, a field-supplied, external condensate pan
should be installed underneath the entire unit, and a secondary condensate
line (with appropriate trap) should be run from the unit into the pan. Any
condensate in this external condensate pan should be drained to a noticeable
place. As an alternative to using an external condensate pan, some localities
may allow the running of a separate ¾-inch (19 mm) condensate line (with
appropriate trap) per local code to a place where the condensate will be
noticeable. The owner of the structure must be informed that when condensate
flows from secondary drain or external condensate pan, the unit requires
servicing or water damage will occur. To further protect against water damage,
install a float switch to shut the unit off if the water in the secondary pan
gets too high. Waste Line Connection
If the condensate line is to be connected to a waste (sewer) line, an open
trap must be installed ahead of the waste line to prevent escape of sewer
gases (Fig. 9).
Humidifier Application
When installing a humidifier in a system which contains a V-coil or Slope
coil, consideration must be given to location of coil slabs (Fig. 10).
- The humidifier should be mounted to the supply plenum or return duct whenever possible.
- Ensure that humidifier has adequate airflow.
Care and Maintenance
To continue high performance and minimize possible equipment failure, it is
essential that periodic maintenance be performed on this equipment. Consult
your local dealer as to the proper frequency of maintenance, but it should be
done at least annually.
The ability to properly perform maintenance on this equipment requires certain
mechanical skills and tools. If you do not possess these, contact your dealer
for maintenance. The only consumer service recommended or required is filter
replacement or cleaning on a monthly basis.
CAUTION ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental damage. Remove and
recycle all components or materials (i.e., oil, refrigerant, etc.) before unit
final disposal.
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