Trane Oxbox J4AH4P24B1A00AA User manual

INSTALLATION INSTRUCTIONS
AIR HANDLERS
WARNING
These instructions are intended as an aid to qualified licensed
service personnel for proper installation, adjustment and
operation of this unit. Read these instructions thoroughly before
attempting installation or operation. Failure to follow these
instruction may result in improper installation, adjustment,
service or maintenance possibly resulting in fire, electrical
shock, property damage, personal injury or death.
RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION
DO NOT DESTROY THIS MANUAL
Please read carefully and keep in a safe place for future reference by a serviceman.
1.5-5Tons J4AH4P SERIES
FEATURING R410A OR R22 REFRIGERANT
HIGH EFFICIENCY
BX-SVN-J4AH4P-1A-EN

1
CONTENTS
1. SAFETY.................................................................................................................2
2. GENERAL...........................................................................................................3
3. APPLICATIONS..................................................................................................6
4. ELECTRICAL WIRING......................................................................................8
5. AIRFLOW PERFORMANCE............................................................................10
6. DUCTWORK.....................................................................................................12
7. REFRIGERANT CONNECTIONS......................................................................12
8. AIR FILTER (NOT FACTORY-INSTALLED)....................................................13
9. FILTER INSTALLATION DIMENSIONS............................................................14
10. WIRING DIAGRAM..........................................................................................15
Air Handler Features
Multi-speed blower motor.
Replace piston to TXV easily.
Multi-position installation - upflow or horizontal right standard; field convertible to horizontal left
or downflow.
Multiple electrical entry locations.
Field-installed electric heater kits 5, 7.5, 10, 15, 20 kW available as an accessory.
Dual front panel design for ease of maintenance.
Blower and coil easy slide out for ease of maintenance.
Fully-insulated cabinet design.
Horizontal and vertical condensate drain pans standard.
Condensate drain pan is polymer with UVC inhibitor.
Primary and secondary condensate drain fittings.
Factory-sealed cabinet certified to achieve 2% or less air leakage rate at 1.0 inch water
column.
Integrated filter rack with tool-less door access.
AHRI and ETL listed.

2
This document is customer property and is to remain with this unit.
These instructions do not cover all the different variations systems nor
does it provide for every possible contingency to be met in connection
with installation.
All phases of this installation must comply with national state and local
codes. If additional information is required, please contact your local
distributor.
1. SAFETY
This is a safety alert symbol. When you see this symbol
on labels or in manuals, be alert to the potential for
personal injury.
This is an attention alert symbol. When you see this
symbol on labels or in manuals, be alert to the potential
for personal injury.
If removal of the blower assembly is required, all disconnect
switches supplying power to the equipment must be de-energized
and locked (if not in sight of unit ) so the field power wires can be
safely removed from the blower assembly. Failure to do so can
cause electrical shock resulting in personal injuring or death.
WARNING
Disconnect all power to unit before installing or servicing. More
than one disconnect switch may be required to de-energize the
equipment. Hazardous voltage can cause server personal injury
or death.
WARNING
WARNING
WARNING
Because of possible damage to equipment or personal injury,
installation, service, and maintenance should be performed by
a trained, qualified service personnel. Consumer service is
recommended only for filter cleaning/replacement. Never
operate the unit with the access panels removed.
WARNING
These instructions are intended as an aid to qualified, licensed
service personnel for proper installation, adjustment and operation
of this unit. Read these instructions thoroughly before attempting
installation or operation. failure to follow these instructions may
result in improper installation, adjustment, service or maintenance
possibly resulting in fire, electrical shock, property damage,
personal injury or death.
The unit must be permanently grounded. Failure to do so can
result in electrical shock causing personal injury or death.
WARNING
PROPOSITION 65: This appliance contains fiberglass
insulation. Respirable particles of fiberglass are known to State
of California to cause cancer.
All manufacturer products meet current federal OSHA
Guidelines for safety. California Proposition 65 warnings are
required for certain products, which are not covered by the
OSHA standards.
California’s Proposition 65 requires warnings for products sold in
California that contain or produce any of over 600 listed
chemicals known to the State of California to cause cancer or
birth defects such as fiberglass insulation, lead in brass, and
combustion products from natural vapor.
All “new equipment” shipped for sale in California will have
labels stating that the product contains and/or produces
Proposition 65 chemicals. Although we have not changed our
processes, having the same label on all our products facilitates
manufacturing and shipping. We cannot always know “when, or
if” products will be sold in the California market.
You may receive inquiries from customers about chemicals
found in, or produced by, some of our heating and
air-conditioning equipment, or found in natural vapor used with
some of our products. Listed below are those chemicals and
substances commonly associated with similar equipment in our
industry and other manufacturers.
Glass Wool (Fiberglass) Insulation
Carbon Monoxide (CO)
Formaldehyde
Benzene
More details are available at the websites for OSHA
(Occupational Safety and Health Administration), at
www.osha.gov and the State of California’s OEHHA (Office of
Environmental Health Hazard Assessment), at www.oehha.org.
Consumer education is important since the chemicals and
substances on the list are found in our daily lives. Most
consumers are aware that products present safety and health
risks, when improperly used, handled and maintained.

3
WARNING
The first 6 inches of supply air plenum and ductwork must be
constructed of sheet metal as required by NFPA 90B. The supply
air plenum or duct must have a solid sheet metal bottom directly
under the unit with no openings, registers or flexible air ducts
located in it. If flexible supply air ducts are used,they may be
located only in the vertical walls of rectangular plenum, a
minimum of 6 inches from the solid bottom. Metal plenum of
duct may be connected to the combustible floor base, if
not, it must be connected to the unit supply duct exposed to the
supply air opening from the downflow unit. Exposing combustible
(non-metal) material to the supply opening of a downflow unit can
cause a fire resulting in property damage, personal injury or
death.
Exception warning to downflow:
Installations on concrete floor slab with supply air plenum and
ductwork completely encased must be not less than 2 inches of
concrete (See NFPA 90A).
2. GENERAL
The unit can be positioned for bottom return air in the upflow position,
left and right return in the horizontal position, top return in downflow
position.
This Air Handler provides the flexibility for installation in any upflow
or downflow horizontal application. The direct drive motors
provide a selection of air volume to match any application. 3-
Speed motors provide selections of air flow to meet desired
applications.
Top and side power and control wiring, accessible screw terminals
for control wiring all combine to make the installation easy, and
minimize installation cost. See Fig.6.
CAUTION
Make sure the blower motor
support is tight (3-motor mount
bolts) then check to see if
wheel is secured to motor
shaft before operating unit.
≥ 25’’
≥0
≥0
≥0
AIRFLOW
Front of unit
CLEARANCES IN THE HORIZONTAL POSITION
CLEARANCES IN THE VERTICAL POSITION
Fig.1 CHECKING MOTOR FIX STATUS
Fig.2
Fig.3
Do not install unit in an area where flammable materials are present
due to the risk of an explosion resulting in serious injury or death.
WARNING
If the supporting structural members are not strong enough to take
the unit’s weight, the unit could fall out of place and cause serious
injury.
If a return-air duct is not installed, carefully select the place and
method of product installation so that air flow into the product will not
be blocked.
The unit should be installed in a level position to ensure proper
condensation drainage. Up to an additional ¼" rise over the width or
depth of the unit is allowed to create additional sloping towards the
drain. Unit must be positioned between level and ¼" rise, sloping
toward the drain connections.
Install the indoor and outdoor unit, power supply wiring and
connecting wires at least 3.5 ft. away from televisions or radios in
order to prevent image interference or noise.
To ensure the proper installation, select a solid and level site.
.Ensure enough space maintained for installation and maintenance.
See Fig.2 and Fig.3.

4
When the unit is installed in a hot and humid place, If the humidity
inside the installation space might exceed 86℉and RH 80%, it is
recommended to insulate the cabinet exterior.
Use glass wool or polyethylene foam as insulation so that the
thickness is more than 2 in. and fits inside the installation space
opening.
Respectively, condensation may form on the surface of the insulation.
Be sure to use insulation that is designed for use with HVAC Systems
Condensation may form on the product during cool operation.It is
also recommended to use second drain pan and secure the unit firmly
to prevent it from falling. see Fig.4 and Fig.5 .
Second drain pan Drain piping
Second drain pan
Drain piping
Fig.4 INSTALLED VERTICALLY
Fig.5 INSTALLED HORIZONTALLY

5
18 41-3/8"[1050] 18-1/8"[460] 20-1/2"[520] 16"[406] 104/117 [47]/[53]
24
30
36
42
48 54-1/2"[1385] 22"[560] 24"[610] 19-1/2"[496]
54-1/2"[1385] 22"[560] 24"[610] 19-1/2"[496] 159/177 [72]/[80]
159/177 [72]/[80]
159/177 [72]/[80]
60 54-1/2"[1385] 22"[560] 24"[610] 19-1/2"[496]
MODEL SIZE
Dimensions inch [mm]
SUPPLY
DUCT "A"
UNIT HEIGHT
"H" IN. [mm]
UNIT WIDTH
"W" IN.[mm]
UNIT LENGHT
"D" IN.[mm]
UNIT WEIGHT
/SHIPPING WEIGHT
(LBS.[kg])
46-1/2"[1180] 19-5/8"[500] 21-5/8"[550] 18"[456] 128/143 [58]/[65]
128/143 [58]/[65]
DIMENSIONAL DATA
46-1/2"[1180] 19-5/8"[500] 21-5/8"[550] 18"[456]
2.1 UNIT DIMENSIONS
UPFLOW UNIT SHOWN;
UNIT MAY BE INSTALLED UPFLOW, DOWNFLOW,
HORIZONTAL RIGHT OR LEFT AIR SUPPLY.
Fig.6 DIMENSIONS
NOTE: 25” CLEARANCE IS REQUIRED IN THE FRONT
OF THE UNIT FOR FILTER AND COIL MAINTENANCE.
SUPPLY AIR
FLANGES ARE PROVIDED
FOR FIELD INSTALLATION
ELECTRICAL CONNECTIONS
MAY EXIT TOP OR EITHER SIDE
HIGH VOLTAGE CONNECTION 7/8”,
1-3/8”, 1-3/4” DIA KNOCK OUTS
LOW VOLTAGE CONNECTION
BREAKER SWITCH
(FOR ELECTRIC HEATER ONLY)
VAPOR LINE CONNECTION COPPER (SWEAT)
LIQUID LINE CONNECTION COPPER (SWEAT)
AUXILIARY DRAIN CONNECTION 3/4 ＂
FEMALE PIPE THREAD (NPT)
AUXILIARY DRAIN CONNECTION 3/4 ＂
FEMALE PIPE THREAD (NPT)
PRIMARY DRAIN CONNCETION 3/4
＂
FEMALE PIPE THREAD (NPT)
A
W
H
D
10 5
16
41-3/8"[1050] 18-1/8"[460] 20-1/2"[520] 16"[406] 108/121 [49]/[55]

3.2 VERTICAL DOWNFLOW
Conversion to Vertical Downflow: A vertical upflow unit may be
converted to vertical downflow. Remove the door and indoor coil and
reinstall 180° from original position. See Fig.8.
IMPORTANT: To comply with certification agencies and the National
Electric Code for downflow application, the circuit breaker(s) on
field-installed electric heater kits must be re-installed per procedure
below so that the breaker switch “on” position and marking is up and,
“off” position and marking is down.
To rotate breaker(s): Rotate one breaker set (circuit) at a time
starting with the one on the right. Loosen both lugs on the load
side of the breaker. (Make sure that wires are identified and are
reinstalled into proper breaker).Wires are bundled with wire ties,
one bundle going to the right lug and one bundle going to the left
lug.
Using a screwdriver or pencil, lift white plastic tab with hole
away from breaker until breaker releases from mounting
opening.
With breaker held in hand, rotate breaker so that “on” position
is up, “off” position is down with unit in planned vertical
mounting position. insert right wire bundle into top right breaker
lug, ensuring all strands of all wires are inserted fully into lug,
and no wire insulation is in lug.
Tighten lug as tight as possible while holding circuit breaker.
Check wires and make sure each wire is secure and none are
loose. Repeat for left wire bundle in left top circuit breaker lug.
Replace breaker by inserting breaker mounting tab opposite
white pull tab in opening, hook mounting tab over edge in
opening.
With screwdriver or pencil, pull blue tab with hole away from
breaker while setting that side of breaker into opening. When
breaker is in place, release tab, locking circuit breaker into
location in opening.
Repeat above operation for remaining breaker(s) (if more than
one is provided).
Replace single point wiring jumper bar, if it is used, on line side
of breaker and tighten securely.
Double check wires and lugs to make sure all are secure and
tight. Check to make sure unit wiring to circuit breaker load lugs
match that shown on the unit wiring diagram.
6
3 APPLICATIONS
3.1 VERTICAL UPFLOW
Vertical Upflow configuration is the factory set on all models.See
Fig.6.
If return air is to be ducted, install duct flush with floor.
Use fireproof resilient gasket 1/8 to 1/4 in. thick between the
ducts, unit and floor. Set unit on floor over opening.
Horizontal right is the default factory configuration for the units.
Horizontal left isn’t the default factory configuration for the units.
Conversion to Horizontal left: A vertical upflow unit may be converted
to horizontal left by removing indoor coil assembly and reinstalling
coil as shown for left hand air supply.
Rotate unit into the downflow position, with the coil compartment
on top and the blower compartment on bottom. See Fig. 8.
Reinstall the indoor coil 180° from original position. Ensure the
retaining channel is fully engaged with the coil rail. See Fig. 8.
Secondary drain pan kits are recommended when the unit is
configured for the horizontal position over a finished ceiling
and/or living space.
Fig.7 DIMENSIONS FOR FRONT CONNECT COIL CAUTION
When using the unit with electrical heater, the switch is used only
for electrical heater on the front of panel.
IMPORTANT NOTE
Torque applied to drain connections should not
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3.3 HORIZONTAL
5/16
2-15/16
1-3/8
1-1/4
5/16
2-13/16
1-9/16
2-3/4

7
Fig.9 INDOOR COIL AND DRAIN PAN SET-UP
HORIZONTAL ADAPTER KIT
VAPOR LINE CONNECTION
LIQUID LINE CONNECTION
PRIMARY DRAIN
CONNECTION
VERTICAL DRAIN PAN
AUXILIARY HORIZONTAL
AUXILIARY UPFLOW/DOWNFLOW
STRAPS
REAR WATER CATCHER
TOP AIR STOP
DRAIN CONNECTION
DRAIN CONNECTION
FRONT WATER CATCHER
STRAPS
THIS SYSTEM IS CHARGED WITH NITROGEN BEFORE SHIPMENT
42K,48K,60K 36K,30K
24k,18K
A
1:4
A
RAILS
RAILS
DETAIL A
ENSURE THE RETAINING
CHANNEL IS FULLY ENGAGED
WITH THE COIL RAIL.
Fig.8 VERTICAL DOWNFLOW & HORIZONTAL LEFT APPLICATIONS
(lower front service panel removed “view”.)
AIRFLOW
AIRFLOW

8
4.3 GROUNDING
4. ELECTRICAL WIRING
Field wiring must comply with the National Electric Code (C.E.C. in
Canada) and any applicable local ordinance.
WARNING
Disconnect all power to unit before installing or servicing. More
than one disconnect switch may be required to de-energize the
equipment. Hazardous voltage can cause severe personal injury
or death.
4.1 POWER WIRING
It is important that proper electrical power is available for connection
to the unit model being installed. See the unit nameplate, wiring
diagram and electrical data in the installation instructions.
3.4 INSTALLATION IN AN UNCONDITIONED SPACE
IMPORTANT: There are two pairs of coil rails in the air handler for
default and counter flow application. If the air handler is installed in
an unconditioned space, the two unused coil rails should be removed
to minimize air handler surface sweating. The coil rails can be easily
removed by taking off the 6 mounting screws from both sides of the
cabinet.
4.2 CONTROL WIRING
IMPORTANT: Class 2 low voltage control wiring should not be run in
conduit with main power wiring and must be separated from power
wiring, unless class 1 wire of proper voltage rating is used.
Low voltage control wiring should be 18 Awg. color-coded. For
lengths longer than 100 ft., 16 Awg. wire should be used.
Low voltage control connections are made to low voltage pigtails
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Connections for control wiring are made with wire nuts. Control
wiring knockouts (5/8
＂ and 7/8 ＂ ) are also provided on the right
and left side of the unit for side connection.
See wiring diagrams attached to indoor and outdoor sections to
be connected.
Make sure, after installation, separation of control wiring and
power wiring has been maintained.
Grounding may be accomplished by grounding metal conduit
when installed in accordance with electrical codes to the unit
cabinet.
Grounding may also be accomplished by attaching ground
wire(s) to ground lug(s) provided in the unit wiring compartment.
Ground lug(s) are located close to wire entrance on left side of
unit (up-flow). Lug(s) may be moved to marked locations near
wire entrance on right side of unit (up-flow). If alternate location is
more convenient.
Use of multiple supply circuits require grounding of each circuit to
lug(s) provided in unit.
Horizontal units must be configured for right hand air supply or left
hand air supply. Horizontal drain pan must be located under
indoor coil. Failure to use the drain pan can result in property
damage.
CAUTION
WARNING
The unit must be permanently grounded. Failure to do so can
result in electrical shock causing personal injury or death.
If required, install a branch circuit disconnect of adequate size,
located within sight of, and readily accessible to the unit.
IMPORTANT: After the Electric Heater is installed, units may be
equipped with one two or three 30-60 amp. circuit breakers.
These breaker(s) protect the internal wiring in the event of a short
circuit and serve as a disconnect. Circuit breakers installed within
the unit do not provide over-current protection of the supply wiring
and therefore may be sized larger than the branch circuit
protection.
Supply circuit power wiring must be 75°C minimum copper
conductors only. See Electrical Data in this section for ampacity,
wire size and circuit protector requirement. Supply circuit
protective devices may be either fuses or “HACR” type circuit
breakers.
Power wiring may be connected to either the right, left side or top.
Three 7/8＂, 1-3/8＂, 1-3/4＂dia. concentric knockouts are
provided for connection of power wiring to unit.
Power wiring is connected to the power terminal block in unit
electric cabinet.
Conversion in Horizontal Direction: Horizontal right-hand supply can
be changed to horizontal left-hand supply by removing the indoor coil
and reinstalling 180° from original.