J4AH4P Installation Manual

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
exceed 15ft.lbs.See Fig.6&7.
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