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*Filter status switch and humidity sensor cannot function
simultaneously. Only one sensor can be wired.
Fig. 9 — Apollo Control Wiring Schematic — 50HJQ, 12
1
/
2
and 15 Ton Units
LEGEND
C—
Contactor
CHAS —
Ground
COM —
Common
DX —
Direct Expansion
ECON —
Economizer
GND —
Ground
HT —
Heat
IAQ —
Indoor Air Quality
NC —
Normally Closed
NO —
Normally Open
OAT —
Outdoor-Air Thermostat
SAT —
Saturated-Air Temperature
Factory Wiring
Field Wiring