Trane 4PXCAU24BS3HAA Assembly instructions
Installer’s Guide
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service information pack
upon completion of work.
WARNING
!
WARNING (Medium/high pressure)
Contains Refrigerant!
System contains oil and refrigerant under high pressure.
Recover refrigerant to relieve pressure before opening the
system. See unit nameplate for refrigerant type. Do not
use non-approved refrigerants, refrigerant substitutes, or
refrigerant additives.
Failure to follow proper procedures or the use of non-
approved refrigerants, substitutes, or refrigerant additives
could result in death, serious injury, or equipment damage.
A341869P30
2. INDOOR UNIT AIRFLOW
Indoor unit must provide the required airflow for the heat pump
or cooling combinations approved for these coils.
IMPORTANT: Review your installation requirements. Check
the table on the outline drawings and note all dimensions
for your coil before beginning the installation.
Table of Contents
General .................................................................................1
Application Information ......................................................1
Recommendation ................................................................2
Furnace in Upflow Position ................................................2
Furnace in Downflow Position ...........................................3
Maximum Airflow Setting, CFM ..........................................3
Installing / Brazing Refrigerant Lines ................................3
Leak Check...........................................................................4
Condensate Drain Piping....................................................4
Cleaning the Coil .................................................................4
Outline Drawings .................................................................5
Troubleshooting Indoor TXV / Cooling Mode ....................8
Figure 1
18-AD32D1-4E-EN
Cased Aluminum Coils
"Dedicated Upflow / Downflow"
Convertible to horizontal with separately purchased kit
Upflow models:
4PXCAU24BS3HAA
4PXCAU32BS3HAA
4PXCBU24BS3HAA
4PXCBU30BS3HAA
4PXCCU30BS3HAA
4PXCBU36BS3HAA
4PXCCU36BS3HAA
4PXCBU42BS3HAA
4PXCCU42BS3HAA
4PXCBU48BS3HAA
4PXCCU48BS3HAA
4PXCDU48BS3HAA
4PXCCU60BS3HAA
4PXCDU60BS3HAA
Downflow models:
4PXCAD24BS3HDA
4PXCBD24BS3HDA
4PXCBD30BS3HDA
4PXCCD30BS3HDA
4PXCBD36BS3HDA
4PXCCD36BS3HDA
4PXCBD42BS3HDA
4PXCCD42BS3HDA
4PXCBD48BS3HDA
4PXCCD48BS3HDA
4PXCDD48BS3HDA
4PXCCD60BS3HDA
4PXCDD60BS3HDA
NOTE:
OPTIONAL DOWNFLOW GASKET INSTALLATION: For
unusually humid applications that expect prolonged
operation above 70% RH, it is recommended to use the
BAYGSKT001A0 gasket kit to prevent water from forming
on the bottom of the drain pan and dripping into the sup-
ply ductwork.
NOTE: 4PXC upow coils may be installed in Upow,
Downow, Horizontal Right with kit, and Horizontal Left with
kit.
4PXC downow coils may be installed in Downow and
Horizontal Right with kit.
1. FURNACE AND COIL
The coil MUST BE installed downstream (in the outlet air) of
the furnace.
WARNING
!
This product can expose you to chemicals including
lead, which are known to the State of California to case
cancer and birth defects or other reproductive harm.
For more information go to www. P65Warnings.ca.gov
A. GENERAL
These coils are designed for use in combination with a heat pump
or cooling outdoor section using R-410A REFRIGERANT.
The 4PXC equipment has been evaluated in accordance with
the Code of Federal Regulations, Chapter XX, Part 3280 or the
equivalent. “Suitable for Mobile Home use” The height of the
Furnace, Coil and discharge duct work must be 7 ft. or less.
Inspect the coil for shipping damage. Notify the transportation
company immediately if the coil is damaged.
B. APPLICATION INFORMATION
18-AD32D1-4E-EN
Installer’s Guide
CAUTION
!
Caution: This coil is pressurized with 8-12 psig of dry
air. Do not stand directly in front of the coil connections
when removing sealing plugs. If no pressure is released,
check for leaks.
C. RECOMMENDATION
If a coil is part of the total system installation, use the Installer’s
Guide packaged with the furnaces, outdoor sections, and ther-
mostat for physically installing those components.
UPFLOW
FURNACE
CASED
COIL
SCREWS
(BO
TH SIDES)
SELF TAPPING SCREWS (4)
1-1/2” MAXIMUM
FIELD SUPPLIED
FOR UPFLOW /
HORIZONTAL LEFT
INSTALLATIONS
E. FURNACE IN DOWNFLOW POSITION
1. UPFLOW COIL CONVERSION (Models:
4PXCBU36BS3HAA, 4PXCCU36BS3HAA,
4PXCBU42BS3HAA, 4PXCCU42BS3HAA,
4PXCBU48BS3HAA, 4PXCCU48BS3HAA,
4PXCDU48BS3HAA, 4PXCCU60BS3HAA,
4PXCDU60BS3HAA only)
a. For maximum efficiency, remove the factory installed
two-piece baffle assembly from the apex of the coil by
removing the 5/16” hex head screws. See Figure 2.
b. Replace only the top baffle using the same screws
previously removed.
1. DOWNFLOW GAS FURNACE
When a coil is used with a downflow furnace, a subbase is not
required between the coil case and combustible flooring.
a. Place the coil case on the furnace supply air plenum.
b. Secure the coil case to the plenum.
c. Set the furnace on top of the coil case, making sure
that the back side of the discharge opening is snug up
against the duct flange at the top rear of the coil case.
d. Secure the coil case to the furnace and seal for air
leaks as required.
2. DOWNFLOW GASKET INSTALLATION (OPTIONAL):
For unusually humid applications that expect prolonged
operation above 70% RH, it is recommended to use the
BAYGSKT001A0 gasket kit to prevent water from forming
on the bottom of the drain pan and dripping into the supply
ductwork.
a. Lay the coil on its back side.
b. Locate the 4" wide gasket material found in
CAUTION
!
Caution: This coil is pressurized with 8-12 psig of dry
air. Do not stand directly in front of the coil connections
when removing sealing plugs. If no pressure is released,
check for leaks.
D. FURNACE IN UPFLOW POSITION
APPLICATION USES UPFLOW COIL MODELS ONLY
IMPORTANT:
If installing the coil in the horizontal position, you MUST
use the horizontal kit listed below for this coil model num-
ber and follow the instructions in the installation guide
provided with the conversion kit.
Model Number Horizontal Kit No.
4PXCAU24BS3HAA
4PXCAU32BS3HAA
4PXCBU24BS3HAA
4PXCBU30BS3HAA
4PXCCU30BS3HAA
4PXCAD24BS3HDA
4PXCBD24BS3HDA
4PXCBD30BS3HDA
4PXCCD30BS3HDA
BAYCONV18A
4PXCBU36BS3HAA
4PXCCU36BS3HAA
4PXCBD36BS3HDA
4PXCCD36BS3HDA
BAYCONV23A
4PXCBU42BS3HAA
4PXCCU42BS3HAA
4PXCBU48BS3HAA
4PXCCU48BS3HAA
4PXCDU48BS3HAA
4PXCBD42BS3HDA
4PXCCD42BS3HDA
4PXCBD48BS3HDA
4PXCCD48BS3HDA
4PXCDD48BS3HDA
BAYCONV27A
4PXCCU60BS3HAA
4PXCDU60BS3HAA
4PXCCD60BS3HDA
4PXCDD60BS3HDA
BAYCONV30A
Figure 3
Figure 2
Remove
and
Discard
Replace
2. UPFLOW GAS FURNACE
a. Apply gasket material (duct seal field supplied) to ALL
mating surfaces between the furnace and the coil case.
b. Set the coil case on top of the furnace. Connect the
ductwork to the coil case using field supplied screws.
c. Secure the coil case to the furnace and seal for air
leaks as required.
NOTE:
4PXC upow coils may be installed in Upow, Downow,
Horizontal Right with kit, and Horizontal Left with kit.
4PXC downow coils may be installed in Downow and
Horizontal Right with kit.
18-AD32D1-4E-EN 3
Installer’s Guide
Maximum airflow setting, CFM
Coil Upflow Downflow Horizontal
Left
Horizontal
Right
4PXC*U24BS3HAA 900 750 800 900
4PXC*D24BS3HDA n/a n/a
4PXC*U30BS3HAA 1125 925 1000 1125
4PXC*D30BS3HDA n/a n/a
4PXC*U32BS3HAA 1350 1200 1350
13504PXC*U36BS3HAA 1100 1200
4PXC*D36BS3HDA n/a n/a
4PXC*U42BS3HAA 1575 1300 1400 1575
4PXC*D42BS3HDA n/a n/a
4PXC*U48BS3HAA 1800 1475 1600 1800
4PXC*D48BS3HDA n/a n/a
4PXC*U60BS3HAA 2250 1850 2000 2250
4PXC*D60BS3HDA n/a n/a
* May be "A", "B", "C", or "D"
F. MAXIMUM AIRFLOW SETTING, CFM
NOTE:
Water blow-off could occur in certain installation posi-
tions if the airow setting exceeds the maximum values
listed.
IMPORTANT:
Do not unseal refrigerant tubing until ready to t refrigerant
lines.
There is only a holding charge of dry air in the indoor coil, therefore
no loss of operating refrigerant charge occurs when the sealing
plugs are removed.
G. INSTALLING / BRAZING REFRIGERANT LINES
Do NOT open refrigerant valve at the outdoor unit until the
refrigerant lines and coil have been brazed, evacuated, and
leak checked. This would cause contamination of the refrig-
erant or possible discharge of refrigerant to the atmosphere.
1. The following steps are to be considered when installing the
refrigerant lines:
a. Determine the most practical way to run the lines.
b. Consider types of bends to be made and space limitations.
c. Route the tubing making all required bends and properly
secure the tubing before making final connections.
NOTE: Refrigerant lines must be isolated from the structure and
the holes must be sealed weather tight after installation.
NOTE:
The TXV setting on this unit may run high superheat
(15-25°F) by design when measured at the outdoor unit.
Figure 4
Attach Downflow
Bottom Gasket
Start
here
Figure 5
Note: when installing coil onto an S-Series furnaces
in horizontal right or downflow configuration, bend
the flanges downward for a flush fit.
BAYGSKT001A0.
c. Attach the 4" gasket material to three sides of the bottom
of the drain pan as shown. Make sure to start by matching
up the edge of the gasket material to the inner edge of the
drain pan by the coil fins and working outwards.
d. The gasket material can be cut or ripped easily so that
it can be tailored to fit. The gasket material must cover the
three sides along the entire length of the coil as shown in
Figure 4.
CAUTION
!
4 18-AD32D1-4E-EN
Installer’s Guide
NOTE:
TXV bulb MUST be protected (wrapped with wet rag) or
removed, while brazing the tubing. Overheating of the
sensing bulb will affect the functional characteristics and
performance of the comfort coil.
1. Remove both rubber plugs from the indoor coil.
2.Field supplied tubing should be cut square, round and free of burrs
at the connecting end. Clean the tubing to prevent contaminants
from entering the system.
3. Run the refrigerant tubing into the stub tube sockets of the
indoor unit coil.
PAINTED AREAS OF THE UNIT MUST BE SHIELDED DURING
BRAZING.
4.Flow a small amount of nitrogen through the tubing while brazing.
5. Use good brazing technique to make leakproof joints.
6. Minimize the use of sharp 90 degree bends.
7. Insulate the suction line and its fittings.
8. Do NOT allow un-insulated lines to come into contact with each
other.
When replacing the bulb and hose clamp, the clamp should
be "snug" but not "tight" - spec is to torque the hose clamp
to 20+/-5in-lb.
9. Wrap the TXV with insulation after the hose clamp has been
installed.
H. LEAK CHECK
1. Using a manifold gauge, connect an external supply of dry
nitrogen to the gauge port on the liquid line.
2. Pressurize the connecting lines and indoor coil to 150 PSIG
maximum.
3. Leak check brazed line connections using soap bubbles. Repair
leaks (if any) after relieving pressure.
4. Evacuate and charge the system per the instructions packaged
with the outdoor unit.
I. CONDENSATE DRAIN PIPING
Condensate drain connections are located in the drain pan at the
bottom of the coil/enclosure assembly. The female threaded fit-
ting protrudes outside of the enclosure for external connection. A
field fabricated trap is not required for proper drainage due to the
Figure 7
Figure 8
J. CLEANING THE COIL
The two piece door (3-piece on 24.5" wide models) allows removal
of the outer casing doors without interference from refrigerant or
condensate lines. Once the outer doors are removed the split
inner coil panels can be easily removed. The inside and outside
of the coil can be easily cleaned with a brush and vacuum with
the panels removed. See Figure 7.
The foil covered insulation on 4PXC coils should be wiped down
and residual dirt and dust should be vacuumed up to maintain
good air quality. See Figure 8.
Figure 6
Capillary tubes will come
out the top of bulb when
positioned correctly.
positive pressure of the furnace; however, it is recommended to
prevent efficiency loss of conditioned air.
1. The drain hole in the drain pan must be cleared of all insulation.
2. Insulate the primary drain line to prevent sweating where dew
point temperatures may be met. (Optional depending on climate
and application needs)
3. Connect the secondary drai
n line to a separate drain line (no
trap is needed in this line).
18-AD32D1-4E-EN 5
Installer’s Guide
MODEL 4PXCAU24BS3
4PXCAD24BS3 4PXCAU32BS3 4PXCBU24BS3
4PXCBD24BS3
4PXCBU36BS3
4PXCBD36BS3
4PXCCU36BS3
4PXCCD36BS3
4PXCBU42BS3
4PXCBD42BS3
4PXCBU48BS3
4PXCBD48BS3
4PXCCU42BS3
4PXCCD42BS3
4PXCCU48BS3
4PXCCD48BS3
4PXCCU60BS3
4PXCCD60BS3
WEIGHT (LBS.) 39 43 42 54 56 61 64 73
REFRIGERANT CONTROL TXV (NON-BLEED)
HEIGHT "A" (IN.) 17-1/2 22-1/2 17-1/2 22-1/2 22-1/2 26-7/8 26-7/8 30-3/4
OVERALL WIDTH "B" (IN.) 14-1/2 14-1/2 17-1/2 17-1/2 21 17-1/2 21 21
OPENING WIDTH "C" (IN.) 13-5/8 13-5/8 16-5/8 16-5/8 20-1/8 16-5/8 20-1/8 20-1/8
TOP OPENING "D" 12-3/4 12-3/4 15-3/4 15-3/4 19-1/4 15-3/4 19-1/4 19-1/4
GAS CONNECTION 3/4 3/4 3/4 7/8 7/8 7/8 7/8 7/8
LIQUID CONNECTION 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8
MATCHED FURNACE WIDTH
(NO ADAPTER REQUIRED) 14-1/2 14-1/2 17-1/2 17-1/2 21 17-1/2 21 21
DRAIN PAN PLASTIC
From Dwg.
D345397 RevE
Outline Drawing for Upflow models: 4PXCAU24BS3HAA, 4PXCAU32BS3HAA, 4PXCBU24BS3HAA, 4PXCBU36BS3HAA, 4PXCCU36BS3HAA, 4PXCBU42BS3HAA, 4PXCCU42BS3HAA,
4PXCBU48BS3HAA, 4PXCCU48BS3HAA, 4PXCCU60BS3HAA, and Downflow models: 4PXCAD18BS3HDA, 4PXCBD18BS3HDA, 4PXCAD24BS3HDA, 4PXCBD24BS3HDA, 4PXCBD36BS3HDA,
4PXCCD36BS3HDA, 4PXCBD42BS3HDA, 4PXCCD42BS3HDA, 4PXCBD48BS3HDA, 4PXCCD48BS3HDA, 4PXCCD60BS3HDA
6 18-AD32D1-4E-EN
Installer’s Guide
From Dwg. D345398 RevC
MODEL 4PXCBU30BS3
4PXCBD30BS3
4PXCCU30BS3
4PXCCD30BS3
WEIGHT (LBS.) 47 49
REFRIGERANT CONTROL TXV (NON-BLEED)
HEIGHT (IN.) 17-1/2 17-1/2
OVERALL WIDTH (IN.) 17-1/2 21
OPENING WIDTH (IN.) 16-5/8 20-1/8
TOP OPENING 15-3/4 19-1/4
GAS CONNECTION 3/4 3/4
LIQUID CONNECTION 3/8 3/8
MATCHED FURNACE WIDTH
(NO ADAPTER REQUIRED) 17-1/2 21
DRAIN PAN PLASTIC
Outline Drawing for Upflow models: 4PXCBU30BS3HAA, 4PXCCU30BS3HAA, and
Downflow models: 4PXCBD30BS3HDA, 4PXCCD30BS3HDA
18-AD32D1-4E-EN 7
Installer’s Guide
From Dwg. D345408 RevD
Outline Drawing for Upflow models: 4PXCDU48BS3HAA, 4PXCDU60BS3HAA, and
Downflow models: 4PXCDD48BS3HDA, 4PXCDD60BS3HDA
MODEL 4PXCDU48BS3
4PXCDD48BS3
4PXCDU60BS3
4PXCDD60BS3
WEIGHT (LBS.) 68 77
REFRIGERANT CONTROL TXV (NON-BLEED)
HEIGHT (IN.) 26-7/8 30-3/4
OVERALL WIDTH (IN.) 24-1/2 24-1/2
OPENING WIDTH (IN.) 23-5/8 23-5/8
TOP OPENING 22-3/4 22-3/4
GAS CONNECTION 7/8 7/8
LIQUID CONNECTION 3/8 3/8
MATCHED FURNACE WIDTH
(NO ADAPTER REQUIRED) 24-1/2 24-1/2
DRAIN PAN PLASTIC
About Trane and American Standard Heating and Air Conditioning
Trane and American Standard create comfortable, energy efficient indoor environments for residential applications.
For more information, please visit www.trane.com or www.americanstandardair.com
The manufacturer has a policy of continuous data improvement and it reserves the right to change design and specifications without notice. We are
committed to using environmentally conscious print practices.
© 2020
18-AD32D1-4E-EN 18 Jun 2020
Supersedes 18-AD32D1-4D-EN (December 2018)
Is sub cooling at the
outdoor unit between
8 to 12F?
Troubleshooting Indoor TXV / Cooling Mode
NO
YES Is superheat
< 5F? YES
Correct air
flow
problem
Is air flow at least
350 CFM per ton?
YES
NO
Remove sensing bulb from the
suction line. Measure superheat
at indoor coil while holding the
bulb in bare hand for one minute.
Does superheat decrease?
Measure superheat at indoor coil
while placing the bulb in an ice
and water bath for one minute.
Does superheat increase?
YES
Replace the
TXV
TXV is OK
NO
Is superheat
< 25F? YES
NO
Is indoor
temperature more
than 85F?
NO
Is sub cooling less
than 8F?
YES
Confirm that charge
is correct and look
for dirty or restricted
outdoor coil.
Confirm that
charge is
correct.
NO
Before starting, insure the
blower wheel, indoor and outdoor
coils are clean.
Is the liquid line
temperature at indoor
coil within 8F of outdoor
liquid line temperature?
YES
Verify line set is
sized properly
for application
NO
The system is running at max
capacity and this may be
causing the High superheat.
Wait until indoor temperature
is less than 80F and check
superheat again.
YES
YES
Verify Inlet screen
of inlet tube
assembly is clear
of debris
NO
Verify Inlet screen
of inlet tube
assembly is clear
of debris
NO
This manual suits for next models
26
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