Trane 4TXFH024CZ3HHA Assembly instructions

A. GENERAL
These coils are designed for use as cooling only or in
combination with a Heat Pump outdoor section.
B. APPLICATION INFORMATION
1. FURNACE AND COIL
Coil MUST BE installed downstream (discharge air)
of the furnace.
2. INDOOR UNIT AIRFLOW
Indoor unit must provide the required airow for
Cooling only or Heat Pump System Combination.
INSPECTION
Check carefully for any shipping damage. This must be
reported to and claims made against the transportation
company immediately. Check to be sure all major
components are in the unit. Any missing parts should
be reported to your supplier at once, and replaced with
authorized parts only.
Horizontal, Flat “Cased” Coils
All Aluminum Coils: 4TXFH024CZ3HH*, 4TXFH033CC3HH*,
4TXFH036CZ3HH*, 4TXFH041CC3HH*, 4TXFH054CC3HH*,
4TXFH063CZ3HH*, 4TXFH064AZ3HHA ** May be "A" or "B"
Installer’s Guide
C. RECOMMENDATIONS
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.
1. If this coil is a part of the total system installation, then
use the Installer’s Guide packaged with the furnaces,
Heat Pump outdoor sections, and Control Center for
physically installing those components.
2. It is recommended that the outline drawing
(page 2) be studied and dimensions properly noted
and checked against selected installation site. By
noting in advance proper clearance allowances for
installation and possible future service of the coil.
A341869P36
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.
①
18-AD25D1-4C-EN
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
D. INSTALLING 4TXFH COIL/
ENCLOSURE
Coil/enclosure assembly can be used for all horizontal
furnaces (gas and electric) applications (Figure 1), and
for applications of vertical upow furnaces (Figure 2),
where the top clearance is insu󰀩cient for installing an
“A” coil and enclosure, and there is access to a run of
horizontal duct.
SUPPLY DUCT
2 FEET MINIMUM
RECOMMENDED
FURNACE
FLUE STACK
TRANSITION DUCT
COIL/ENCLOSURE ASSY
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.

2 18-AD25D1-4C-EN
Installer’s Guide
Outline Drawing - 4TXFH024CZ3HHB, 4TXFH033CC3HHB, 4TXFH036CZ3HHB, 4TXFH041CC3HHB, 4TXFH054CC3HHB, 4TXFH064AZ3HHA
All dimensions are in inches.
From Dwg. D345541 Rev. B

18-AD25D1-4C-EN 3
Installer’s Guide
Since coil/ enclosure assembly must be installed within
the horizontal run of duct, a transition duct must be
fabricated to mate with the furnace supply outlet duct
ange on one end and the duct ange connection on the
coil/ enclosure assembly on the other end.
For maximum performance, it is recommended that the
transition duct be at least 2 feet in length.
1. Secure the transition duct to the furnace with the
furnace in position.
2. The refrigerant lines and condensate connections of
cased coils may be on either side of the supply air
duct. The air may be directed through the coil from
either side of the coil.
3. Attach the coil/ enclosure assembly to the transition
from the furnace, providing proper support for coil/
enclosure assembly’s weight. Keep the coil level.
Extra pitch is not required for coil to drain properly.
4. Secure the downstream side of coil/ enclosure
assembly to the supply air duct.
NOTE:
Secure properly so there will be no air leakage.
5. The indoor coil must be evacuated through the
refrigerant lines at the outdoor unit before opening
the service valves. See evacuation procedure in Field
Fabricated Refrigerant Lines section of the Installer’s
Guide for the outdoor unit.
6. Complete the installation of the unit per installation
instructions.
E. INSTALLING/BRAZING REFRIGERANT
LINES
CAUTION
!
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 refrigerant or possible discharge
of refrigerant to the atmosphere.
FLUE
ST
ACK
TRANSITION DUCT
COIL/ENCLOSURE ASSY
SUPPLY DUCT
VERTICAL UPFLOW
FURNACE
②
③
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 nal
connections.
NOTE:
Refrigerant lines must be isolated from the structure and
the holes must be sealed weather tight after installation.
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.
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.

4 18-AD25D1-4C-EN
Installer’s Guide
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 ttings.
8. Do NOT allow un-insulated lines to come into contact
with each other.
NOTE:
Torque specication for TXV equals 1/6 turn past nger
tight. Make sure to backwrench when tightening as
shown in Firgure 3.
F. 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.
G. CONDENSATE DRAIN PIPING
(SEE FIGURE 5)
NOTE:
When coils are installed above ceilings or in other
locations where damage from condensate overow
may occur. A eld fabricated auxiliary drain pan shall be
installed under the coil enclosure. Drain lines from this
pan must be installed, but should NOT be connected to
the primary drain.
Condensate drain connections are located in the drain pan
at the bottom of the coil/enclosure assembly. The female
threaded tting protrudes outside of the enclosure for
external connection. A eld fabricated trap is not required
for proper drainage due to the positive pressure of the
furnace; however, it is recommended to prevent e󰀩ciency
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).
FIELD FABRICATED TRAP
⑤
2" MIN.
2" MIN.
CAP OR PLUG
Trap must be within 4'
of furnace / air handler
condensate drain connection.
Close as possible
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.
H. SECONDARY CONDENSATE DRAIN
A secondary condensate drain connection, now called for
by many building codes, has been provided, on 4TXFH
coils. Reducing ttings and copper tubing can be used in
most cases.
IMPORTANT:
Plug all drain line connection(s) not used. Do NOT use
heat or torch near drain ttings.
I. DUCT CONNECTIONS
The supply and return air duct should be connected to
the unit with a ame retardant duct connectors. Duct
ange connections are provided at both supply and
discharge openings of the coil.
④
1. Remove both sealing 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.

18-AD25D1-4C-EN 5
Installer’s Guide
Is sub cooling at the
outdoor unit between
8 to 12F?
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
NO
TXV is OK
NO
Is superheat
< 20F?
NO
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 Has TXV screen
been checked and
cleaned?
YES
Inlet screen located in liquid line. Check, clean, &
replace if necessary.

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-AD25D1-4C-EN 18 May 2020
Supersedes 18-AD25D1-4B-EN (February 2020)
The sensing bulb should be located between the
8 o’clock & 4 o’clock positions; it should not be
located in the shaded area as shown in the
illustration. The gas line should be clean and the
sensing bulb clamped and insulated for proper
operation.
Wrap TXV with web cloth before
brazing. Direct torch away from
wrapped valve.