Trane 4PXCAU24BS3HAA Istruzioni per il montaggio

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 upow coils may be installed in Upow,

Downow, Horizontal Right with kit, and Horizontal Left with

kit.

4PXC downow coils may be installed in Downow 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 upow coils may be installed in Upow, Downow,

Horizontal Right with kit, and Horizontal Left with kit.

4PXC downow coils may be installed in Downow 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 airow 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.

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

YES Is superheat

< 5F? YES

Correct air

flow

problem

Is air flow at least

350 CFM per ton?

YES

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

Is superheat

< 25F? YES

Is indoor

temperature more

than 85F?

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.

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

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

Verify Inlet screen

of inlet tube

assembly is clear

of debris

Verify Inlet screen

of inlet tube

assembly is clear

of debris

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