Control Transformer - Chromalox PF490-5 Installation Instructions And Renewal Parts Identification

1. CONTROL TRANSFORMER

This item is located in the electrical enclosure. It may be replaced
while in the enclosure. To service or replace remove 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 orien-
tation 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 indicated 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
Figure 14
CXH-A with Built in Disconnect Switch
(Must use HMK-00 Ceiling Mounting Kit)
Publication Number
PF458
PF461
PF462
MAINTENANCE AND REPAIR
RENEWAL PARTS IDENTIFICATION
Mounting Kits for Model CXH-EP
Material Safety Data Sheet Chromakool EG
Material Safety Data Sheet Chromakool PG
9
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
minimum) against the locking ring and tighten securely before re-
energizing unit. Lamp should flash on momentarily when unit is
energized. See renewal parts section for part number of replace-
ment bulbs.
Figure 15
CXH-A with Built in Thermostat
Title