ACiQ EVM4X Multipoise Cased Cooling and Heating Evaporator Coil Installation Guide
- June 15, 2024
- ACiQ
Table of Contents
ACiQ EVM4X Multipoise Cased Cooling and Heating Evaporator Coil
PRODUCT INFORMATION
Specifications
- Product Name: EVM4X, WMVM Multipoise Cased Cooling and Heating Evaporator Coil
- Compatibility: To be used with Outdoor HP Piston Heating Metering Device Only*
- Approved Combinations: Refer to AHRI Directory for Approved Rated Combinations
Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
Safety Considerations
Follow all safety codes. Wear safety glasses, protective clothing, and work
gloves. Use a quenching cloth for brazing operations. Have a 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.
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 HEAT PUMP OR AIR CONDITIONER, complying
with PARTIAL UNIT requirements of UL/CSA 60335-2-40 or UL 1995 Standard and
must only be connected to other units that have been confirmed as complying
with corresponding PARTIAL UNIT requirements of this UL/CSA 60335-2-40 or UL
1995 Standard.
WARNING ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Before installing, modifying, or servicing the system, always turn off the
main power to the system. There may be more than one disconnect switch. Lock
out and tag the switch with a suitable warning label.
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.
Airflow
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 ensure that it is correct. Generally, the cfm should be 350 to 450
cfm/ton during normal cooling operation.
FAQ
-
Q: Can I use this evaporator coil with any heating equipment?
A: No, 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. -
Q: What safety precautions should I take during the installation?
A: Follow all safety codes, wear safety glasses, protective clothing, and work gloves. Use a quenching cloth for brazing operations and have a fire extinguisher available. Read the instructions thoroughly and consult local building codes. -
Q: What is the correct airflow for this evaporator coil?
A: After system start-up, check the cfm (cubic feet per minute) to ensure that it is correct. Generally, the cfm should be 350 to 450 cfm/ton during normal cooling operation. -
Q: Can I use air or gases containing oxygen for leak testing or operating refrigerant compressors?
A: No, using air or gases containing oxygen can cause an explosion. Never use them for leak testing or operating refrigerant compressors. -
Q: What should I do if I encounter sharp edges or burrs on sheet metal parts?
A: Use care and wear appropriate protective clothing and gloves when handling parts to avoid any potential cut hazards. -
Q: Can the aluminum tubes come in direct contact with dissimilar metals?
A: No, make sure that aluminum tubes do not come in direct contact or allow for condensate run-off with a dissimilar metal to prevent galvanic corrosion and possible premature failure.
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 HEAT PUMP OR AIR CONDITIONER, complying
with PARTIAL UNIT requirements of UL/CSA 60335-2-40 or UL 1995 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 or UL 1995
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.
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, downflow, or
horizontal furnaces in cooling or heating applications. The coils are enclosed
in a painted casing, have factory-installed TXVs, and are used with Puron®
refrigerant R-410A systems.
IMPORTANT: These coils can only operate with OD Heat Pump installations
that have a Piston Heating Metering device. Use of the V-Coil for OD HP
installations that do not have a Piston Metering Device are not an approved
installation. Refer to the AHRI Directory for Approved Rated Combinations.
Installation
These units can be installed in upflow, downflow, or horizontal configurations. Before installation, there are several performance requirements that must be considered, because poor installation can negatively affect 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 cooling 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 p3).
- To install cased coils in downflow applications, follow the instructions below, (Downflow Coil Installation on p5).
- To install cased coils in horizontal applications, follow the instructions below, (Horizontal 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, downflow, or horizontal
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.
Table 1 – Coil Connections / Orientations
IMPORTANT: Any installation configuration shown here that is noted as ‘not recommended’ indicates that this configuration has not been factory tested and therefore full performance specifications have not been certified. In instances where a ‘not recommended’ installation configuration is required, it is the responsibility of the installer to ensure all performance criteria is met.
Downflow Coil Installation
NOTE: In downflow installation with a 4-way multipoise furnace, break off
perforated duct flanges on furnace. See furnace Installation Instructions.
Horizontal Coil Installation
In horizontal installation with a 4-way multipoise furnace, break off
perforated duct flanges on furnace. See furnace Installation Instructions. For
condensate connections, use the correct drain lines per Fig. 14.
The unit can be installed on a work platform, secured to roof truss in attic, suspended from hangers on floor joists in crawl space, or installed on blocks. It is designed to allow airflow in either direction, to mate with horizontal- left or horizontal-right furnace installations. Ensure coil cabinet is level side to side and front to back. It is allowable to add up to 1/2-in. additional slope over length and depth of coil cabinet in the direction of drain pan connection (Fig. 8).
NOTE: In horizontal applications, the vertical condensate drain ports
must be plugged. When connecting condensate drain lines to the horizontal
drain ports, transfer the horizontal drain plugs to the vertical drain pan
ports to assure that all vertical drain ports are plugged.
Horizontal Right Installation
- Use field fabricated attachment plates to secure coil to furnace (Fig. 9).
- Use self-tapping screws to mount attachment plates to coil casing. Install screws no more than 1″ from the outer edge to avoid contacting or interfering with internal components.
- Connect furnace snugly against coil casing.
- Use self-tapping screws to attach furnace (Fig. 10).
- Seal joint between coil casing and furnace to create an air tight seal using locally approved materials.
- If coil is wider than furnace, use 18-in minimum transition and self tapping screws to attach furnace (Fig. 8).
Horizontal Right with Pan Extension (6124 Size Only)
The pan extension is shipped with the unit. There should not be any gaps
between the plastic condensate pan and the pan extension. All condensate
should flow from the pan extension to the plastic condensate pan and not leak
into the coil cabinet or duct. Install the pan extension onto the right end of
the horizontal-condensate pan. The pan extension is slotted to fit onto the
condensate pan edge and will extend into the supply plenum (Fig. 11).
Horizontal Left Installation
- Unbend the 4 tabs at the right side of the casing (Fig. 12).
- Connect furnace snugly against coil casing.
- Use self-tapping screws to attach furnace (Fig. 13).
- Seal joint between coil casing and furnace to create air tight seal using locally approved materials.
- If coil is wider than furnace, use 18-in. minimum transition and self tapping screws to attach furnace (Fig. 8).
Refrigerant Line Connections
CAUTION WATER MANAGEMENT HAZARD
Failure to follow this caution could cause product and/or property damage. The
furnace coil door must be properly installed when the coil is in operation. To
ensure proper condensate water management, the drain pan must not touch the
coil. When properly installed the furnace coil door will correctly align the
condensate pan with the coil.
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 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.
IMPORTANT: Depending on the date of manufacture, the unit’s primary and secondary drains may be reversed from what you are accustomed to. Please check carefully before connecting the drain. Refer to Fig. 14.
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). Six (6) 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. 14).
- 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 result in property damage. Provide trap
with air gap in drain line when connecting 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. 15).
Humidifier Application
When installing a humidifier in a system which contains a V-coil,
consideration must be given to location of coil slabs (Fig. 16).
- The humidifier should be mounted to the supply plenum or return duct whenever possible.
- Ensure that humidifier has adequate airflow.
To continue high performance and minimize possible equipment failure, periodic maintenance must 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 every month.
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.
©2023 Carrier. All rights reserved.
Catalog No: IM-EVM4X-WMVM-03
Replaces: IM-EVM4X-WMVM-02
Manufacturer reserves the right to change, at any time, specifications and
designs without notice and without obligations.
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