Service Manual

SERVICE AND MAINTENANCE FAN COILS
496 08 8001 02 19
Specifications subject to change without notice.
Should temperature continue to fall, R−W circuit is made
through second−stage room thermostat bulb. Circuit R−W
energizes a sequencer bringing on supplemental electric heat.
When thermostat is satisfied, its contacts open de−energizing
contactor and sequencer. All heaters should stop. The indoor
fan motor will stop after 90−100 seconds on the FMA4P and
30 or 90 seconds on the FMA4X.
Figure 14 − FMA4, WAMA, WAXA (sizes 18 & 24) Expanded View− Case
18K & 24K Case
A13135B
Figure 15 − FMA4, WAMA, WAXA (sizes 18 & 24) Expanded View− Duct Components, Blower & Electrical Parts
A13136
NOTE: Time Delay PCB replaced Time delay relay in newer production models.