Chromalox PF490-5 Renewal Parts Identification, Control Transformer, Contactor, Title

MAINTENANCE AND REPAIR

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

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 14	Figure 15
CXH-A with Built in Disconnect Switch	CXH-A with Built in Thermostat
(Must use HMK-00 Ceiling Mounting Kit)

	RENEWAL PARTS IDENTIFICATION
Publication Number		Title
PF458		Mounting Kits for Model CXH-EP
PF461		Material Safety Data Sheet Chromakool EG
PF462		Material Safety Data Sheet Chromakool PG

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