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 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 airflow 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 

com 

pany 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.

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  upflow  furnaces  (Figure  2), 

where  the  top  clearance  is  insufficient  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.

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