Specifications

14
L. Trim all motor leads extending out of the conduit to
6 lengths. Strip off 3/8 of insulation at cut ends. Us-
ing the motor nameplate, previous notes, and marked
wires, reconnect the motor for the unit voltage rating
as indicated on the heater nameplate. Re-attach the
ground wire to the connection inside the enclosure.
Replace cover and tighten securely.
M. Check fan rotation by momentarily energizing the unit.
Air must exit at cabinet front. Reverse any 2 leads at
contactor or line supply disconnect to reverse rotation
of three phase motor.
3. Removal of fan blade does not require that the motor
wiring be disturbed. To clean, service or change the fan
blade proceed as follows:
A. Remove the four carriage bolts holding the motor base
in place on the cabinet platform. Mark the platform to
reposition at same location.
B. Loosen the four screws on the cabinet back holding
the fan guard in place.
C. Pull the motor to the rear extending the conduit con-
nection at the electrical enclosure. Fan blade and hub
set screws can now be accessed by tilting the guard
rearward at top or bottom back over the motor shell.
IV. ELECTRICAL COMPONENT SERVICING
EXPLOSION/ELECTRIC SHOCK HAZARD. Disconnect
all power before opening enclosure covers or ser-
vicing heater. Failure to comply could result in per-
sonal injury or property damage.
When provided, the following components are located in the
cast aluminum hazardous location enclosure. Remove cover
and retaining bolts to gain access the following items (See
Figure 16).
1. CONTROL TRANSFORMER
This item is located in the electrical enclosure. It may be
replaced while in the enclosure. To service or replace re-
move the quick connect wires and mark their locations.
Remove two screws which hold the transformer in place.
Note transformer orientation and voltage labels on top.
Replace transformer in the same orientation and connect
wires. Replace the cast aluminum cover and bolt down.
2. CONTACTOR
This component can be removed from the base plate
while in the enclosure. Follow the same steps as indi-
cated for the transformer replacement.
3. ALARM PILOT LAMP (OPTIONAL)
To replace the bulb, unscrew the red lens bezel while
holding the lock ring until disengaged. Avoid turning the
entire assembly which is held tight to the enclosure with
a locking nut on the inside of the enclosure. It must be
re-tightened if loosened before reuse. Replace the lamp
with a 656 type bulb at the correct control voltage for the
unit (120V or 24). Secure the lens cap (5 threads mini-
mum) against the locking ring and tighten securely be-
fore reenergizing unit. Lamp should flash on momentarily
when unit is energized. See renewal parts section for part
number of replacement bulbs.
Figure 14
CXH-A with Built in Disconnect Switch
(Must use HMK-00 Ceiling Mounting Kit)
Figure 15
CXH-A with Built in Thermostat