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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. 

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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

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1-3/8

1-1/4

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2-13/16

1-9/16

2-3/4

Summary of Contents for OXBOX J4AH4P Series

Page 1: ...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 RECOGNIZ...

Page 2: ......

Page 3: ...orizontal 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 a...

Page 4: ...e 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...

Page 5: ...t 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 Ma...

Page 6: ...ts 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...

Page 7: ...LOW 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...

Page 8: ...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 th...

Page 9: ...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 RA...

Page 10: ...ng 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 compar...

Page 11: ...240 208 5 7 5 10 5 7 5 10 15 5 7 5 10 5 7 5 10 5 7 5 10 15 20 15 20 15 20 60 18 30 36 42 MIN Circuit Ampacity MAX Fuse or Breaker HACR Ampacity Heat Kit Model Air Handler Model kW Electric Heat 5 7 5...

Page 12: ...rrent A CFM 999 953 905 847 757 681 610 543 411 Watts 316 310 306 302 288 279 270 256 240 Current A 1 38 1 36 1 34 1 32 1 28 1 24 1 21 1 16 1 10 CFM 1176 1127 1086 1028 944 842 746 668 569 Watts 342 3...

Page 13: ...r should use only industry recognized procedures Heat pump systems require a specified airflow for electric heat operating Each ton of cooling requires between 350 and 450 cubic feet of air per minute...

Page 14: ...return ductwork grills special filters accessories etc are accounted for in total resistance See airflow performance tables in this manual Design the duct system in accordance with ACCA Manual D Desig...

Page 15: ...ecommended that a professional installation technician is contacted to ensure installation of these such filtration systems are installed correctly IMPORTANT Do not double filter the return air duct s...

Page 16: ...FILTER RAILS FILTER COVER MANUAL BOLT 9 FILTER INSTALLATION DIMENSIONS AIR FILTER REMOVAL DIMENSIONAL DATA 18 24 16 8 426 20 4 518 1 25 4 19 6 14 8 30 36 18 3 466 21 6 548 1 25 4 20 8 16 3 42 48 60 20...

Page 17: ...OR HP SYSTEMS RED GREEN 24RC G Fan Y1 Comp W1 B THERMOSTAT INDOOR UNIT OUTDOOR UNIT G R C Y C BLACK YELLOW BLACK RED GREEN W2 G Fan Y1 Comp W1 B THERMOSTAT INDOOR UNIT OUTDOOR UNIT G R C C B BLACK YEL...

Page 18: ...d blue wire and connect with FAN terminal while medium speed red wire connect with M1 terminal CAPACITANCE CN7 CN8 CN4 CN1 CN11 M1 CN3 LINE VOLTAGE FACTORY STANDARD FIELD INSTALLED OPTIONAL LOW FACTOR...

Page 19: ...D FL BLUE 4 1 3 2 CB2 30A W2 L1 L2 L1 L2 LS ELEMENTS 0 C 1 4 8 2 6 RELAY2 POWER RED RED BLACK FL FL BLUE BLUE 4 1 3 2 CB1 60A W1 WHITE L1 L2 L1 L2 BLUE RED LS LS ELEMENTS ELEMENTS BROWN BLACK 1 2 3 4...

Page 20: ...combination Use Table 3 for TXV kit part numbers A TXV may be required to achieve minimum efficiency ratings or for long refrigerant line set applications Reference AHRI for system combination rating...

Page 21: ...5 105 26 19 11 6 5 5 100 27 21 13 7 6 5 95 29 23 14 9 6 5 90 30 25 18 12 7 5 85 32 26 20 15 9 6 80 34 28 22 17 11 6 75 35 30 24 19 13 7 70 37 32 26 21 16 10 65 38 34 29 24 19 13 60 40 36 31 27 22 17 5...

Page 22: ......

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