Tempstar EAM4X Series User manual

484 01 3905 04 8/15/19
Specifications subject to change without notice.
INSTALLATION INSTRUCTIONS
Evaporator Coils, Multipoise
EAM4X18−61 & WLAM 18−61
NOTE: Read the entire instruction manual before starting the
installation.
CARE AND MAINTENANCE 6............................
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1...........................
INTRODUCTION 2......................................
INSTALLATION 2.......................................
Inspect Equipment 2...................................
Select Installation Procedure 2..........................
Installation of Evaporator Coils 3.........................
Connect Refrigerant Piping 5............................
Connect Lines 5.......................................
Refrigerant Metering Device 5...........................
Condensate Drain Line Connection 6.....................
Waste Line Connection 7...............................
CARE AND MAINTENANCE 7............................
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.
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
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.
CAUTION
!
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 lead to an explosion.
!WARNING
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
!
PERSONAL INJURY HAZARD
Failure to follow this caution may result in personal injury.
This coil contains Nitrogen precharge of 15 PSIG. Release
of this pressure through the center of the rubber plugs is
required before removing the plugs.
CAUTION
!

2484 01 3905 04
Specifications subject to change without notice.
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.
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.
CAUTION
!
INTRODUCTION
Use this instruction manual to install EAM4X & WLAM indoor
coils on multipoise furnaces. EAM4X & WLAM models are
enclosed in a casing.
Table 1 COIL INFORMATION
Model Number Tons
Flush to fit
Furnace
width
Coil Connection
Tube Size
inches
inches (mm) Liquid
Suc-
tion
EAM4X18L14A 1*1/2 14*3/16 (360) 3/8 5/8
EAM4X19L17A 1*1/2 17*1/2 (445) 3/8 3/4
EAM4X24L14A 2 14*3/16 (360) 3/8 5/8
EAM4X24L17A 2 17*1/2 (445) 3/8 5/8
EAM4X25L17A 2 17*1/2 (445) 3/8 3/4
EAM4X30L14A 2*1/2 14*3/16 (360) 3/8 3/4
EAM4X30L17A 2*1/2 17*1/2 (445) 3/8 3/4
EAM4X36L14A 3 14*3/16 (360) 3/8 3/4
EAM4X36L17A 3 17*1/2 (445) 3/8 3/4
EAM4X36L21A 3 21 (533) 3/8 3/4
EAM4X37L17A 3 17*1/2 (445) 3/8 3/4
EAM4X37L21A 3 21 (533) 3/8 7/8
EAM4X42L21A 3*1/2 21 (533) 3/8 7/8
EAM4X42L24A 3*1/2 24*1/2 (622) 3/8 7/8
EAM4X43L21A 3*1/2 21 (533) 3/8 7/8
EAM4X48L17A 4 17*1/2 (445) 3/8 7/8
EAM4X48L21A 4 21 (533) 3/8 7/8
EAM4X48L24A 4 24*1/2 (622) 3/8 7/8
EAM4X60L21A 5 21 (533) 3/8 7/8
EAM4X61L21A 5 21 (533) 3/8 7/8
EAM4X60L24A 5 24*1/2 (622) 3/8 7/8
EAM4X61L24A 5 24*1/2 (622) 3/8 7/8
Model Number Tons
Flush to fit
Furnace
width
Coil Connection
Tube Size
inches
WLAM184AA 1*1/2 14*3/16 (360) 3/8 5/8
WLAM194BA 1*1/2 17*1/2 (445) 3/8 3/4
WLAM244AA 2 14*3/16 (360) 3/8 5/8
WLAM244BA 2 17*1/2 (445) 3/8 5/8
WLAM254BA 2 17*1/2 (445) 3/8 3/4
WLAM304AA 2−1/2 14*3/16 (360) 3/8 3/4
WLAM304BA 2−1/2 17*1/2 (445) 3/8 3/4
WLAM364BA 3 17*1/2 (445) 3/8 3/4
WLAM374BA 3 17*1/2 (445) 3/8 3/4
WLAM374CA 3 21 (533) 3/8 7/8
WLAM424CA 3−1/2 21 (533) 3/8 7/8
WLAM434CA 3−1/2 21 (533) 3/8 7/8
WLAM484CA 4 21 (533) 3/8 7/8
WLAM604CA 5 21 (533) 3/8 7/8
WLAM614CA 5 21 (533) 3/8 7/8
WLAM604DA 5 24*1/2 (622) 3/8 7/8
WLAM614DA 5 24*1/2 (622) 3/8 7/8
INSTALLATION
INSPECT EQUIPMENT
File claim with shipper if equipment is damaged.
SELECT INSTALLATION
For upflow application follow:
See Table 1 for dimensions. Note instructions for placement of
coil casing on furnace.

484 01 3905 04 3
Specifications subject to change without notice.
Return
Return Supply
Supply
Evaporator
Coil
Horizontal Left Furnace Installation
Horizontal Right Furnace Installation
A05400
Evaporator
Coil
Return
Return Supply
Supply
Downflow
Furnace
Installation
Upflow
Furnace
Installation
A05401
Figure 1 −Typical Coil Installation on Furnace
INSTALLATION OF EVAPORATOR COILS
Upflow coil installation
The cased coil is designed to fit furnaces of the same width.
1. Set coil in place on upflow furnace discharge air
opening.
2. Ensure coil is level for proper condensate drainage. Do
not tip coil toward condensate drain. Coil casing need
not be fastened or screwed to furnace.
3. When installing wider coil on narrow furnace, create field
fabricated adapter. (See Figure 2)
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.
NOTE: Consult the furnace installation instructions for any
special requirements when installing the coil to the furnace.
Horizontal Right & Left Installation
A170281
Vertical Upflow & Downflow Installation
A170280
Figure 2 −Adapter(s) Installation When Coil Overhangs
Furnace
Downflow Coil Installation
IMPORTANT: Installing “A” coils rotated 90 degrees from the
front of the furnace in downflow applications can cause water
blow off or coil freeze up. This is due to the concentration of air
on one coil slab or lack of air on the opposite coil slab. If the
airflow is high due to ductwork or other causes, and there is a
chance for water blow off, it is recommended that a 4−in.
minimum field−supplied adapter be placed between the coil
and the furnace to allow the air to distribute evenly to both coil
slabs. (See Figure 3)
4. Set cased coil on supply duct opening.
5. Place field fabricated 4−in. minimum adapter on coil
casing. Adapter should be tapered to fit coil/furnace
combination when one of them is larger than the other.
6. Set furnace on adapter.

4484 01 3905 04
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NOTE: In downflow installation with a 4−way multipoise
furnace, break off perforated duct flanges on furnace. See
furnace installation instructions.
4"
A170284
Figure 3 −Downflow Installation with Coil Rotated 905
Horizontal Coil Installation
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.
Horizontal Right Installation
1. Use field fabricated attachment plates to secure coil to
furnace. (See Figure 4)
2. Use self−tapping screws to mount attachment plates to
coil casing.
Self-Tapping Screws
A13065
Figure 4 −Horizontal Right Installation
3. Connect furnace snugly against coil casing.
4. Use self−tapping screws to attach furnace. (See
Figure 5)
5. Seal joint between coil casing and furnace to create an
air tight seal using locally approved materials.
6. Use cork tape to create air seal between the undersides
of the pan extension and front of the vertical drain pan as
shown in Figure 6.
7. Install included condensate pan extension and two
corner screws as shown in Figure 7.
8. If coil is wider than furnace, use 4−in minimum transition
and self tapping screws to attach furnace. (See Figure 2)
A13063
Figure 5 −Horizontal Right Installation

484 01 3905 04 5
Specifications subject to change without notice.
A170282
Figure 6 −Condensate Pan Extension Cork Tape Location
A170283
Figure 7 −Condensate Pan Extension Mounting Screws
Horizontal Left Installation
1. Unbend the 4 tabs at the right side of the casing. (See
Figure 8)
2. Connect furnace snugly against coil casing.
3. Use self−tapping screws to attach furnace. (See
Figure 9)
4. Seal joint between coil casing and furnace to create air
tight seal using locally approved materials.
5. If coil is wider than furnace, use 4−in. Minimum transition
and self tapping screws to attach furnace. (See Figure 2)
Unbend tab as
shown, 4 places.
A13064
Figure 8 −Horizontal Left Installation
Self-Tapping Screws
A13066
Figure 9 −Horizontal Left Installation
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 15 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.

6484 01 3905 04
Specifications subject to change without notice.
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.
CAUTION
!
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.
1. Remove cabinet access door.
2. 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.
3. Remove tubing plate with rubber grommets and slide plate
with grommets onto the refrigerant lines (field line−set),
away from braze joints.
4. Fit refrigerant lines into coil stubs. Wrap a heat sinking
material such as a wet cloth behind braze joints.
5. Wrap TXV and nearby tubing with a heat−sinking material
such as a wet cloth.
6. Use 1/2 psig Nitrogen purge in the suction and out the the
liquid line.
7. Braze using a Sil−Fos or Phos−copper alloy. Do not use
soft solder.
8. 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.
9. Leak check connections before insulating entire suction
line.
10. Slide tubing plate with rubber grommets over joints.
Position tubing at center of each grommet to ensure an air
seal around the tube. Reinstall cabinet door.
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.
CAUTION
!
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: ALL TXV’S HAVE PRESET SUPERHEAT SETTINGS
AND ARE FIELD NON−ADJUSTABLE.
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.
CAUTION
!
CONDENSATE DRAIN LINE CONNECTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property
damage.
When installing over a finished ceiling and/or living area,
install a field−fabricated secondary condensate pan under
the entire unit.
CAUTION
!
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 plastic plug in
unused condensate drain fitting. Two 3/4 inch female threaded
pipe connections are provided in each coil condensate pan.
A trap is not necessary on the condensate line if on the supply
air side of furnace. For any modular air handler use
recommended minimum of 4” trap, is required. Consult local
codes for additional restrictions or precautions. If local codes
require a trap then the following guidelines are suggested 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 (See Figure 10). 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.
EXPLOSION HAZARD
Failure to follow this warning could result
in personal injury or death.
Provide trap with air gap in drain line
when connecting to waste (sewer) line.
!WARNING

484 01 3905 04 7
Specifications subject to change without notice.
3” (76mm)
A13067
Figure 10 −Condensate Trap
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 3/4 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.
Condensate
Line
Trap
Sewer Line
Air Gap Above
Liquid Level
A10216
Figure 11 −Condensate Drain to Waste Line
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 (See Figure 11)
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.
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.
CAUTION
!
Copyright 2019 International Comfort Products
Lewisburg, TN 37091 USA