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Fig. 7 — Factory-Supplied Wiring to Rooftop Unit and Apollo Control
LEGEND
COM —
Communication
ECONO —
Economizer
NC —
Normally Closed
*Filter status switch and humidity sensor cannot function
simultaneously. Only one sensor can be wired.
Fig. 8 — Apollo Control Wiring Schematic — 48/50HJ, 3 to 20 Ton Units;
48/50TF,TM, 3 to 12-1/2 Ton Units; 48/50TJ,TM, 15 to 25 Ton Units; 50HJQ/TFQ, 3 to 10 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