Instruction manual

PROCEDURE 7—ACCESSORIES
A. Electronic Air Cleaner
The Electronic Air Cleaner may be connected to fan coil as shown in Fig. 20. This method requires a field supplied transformer. See Electronic
Air Cleaner literature for kit requirements.
B. Humidifier
Connect humidifier and humidistat to fan coil unit as shown in Fig. 21 and Fig. 22. The cooling lockout relay is optional (See Fig. 23.)
PROCEDURE 8—SEQUENCE OF OPERATION
A. Continuous Fan
Thermostat closes R to G. G energizes fan relay on PCB which completes circuit to indoor blower motor. When G is de-energized, there is a 90
sec delay before relay opens.
B. Cooling Mode
Thermostat energizes R to G, R to Y, and R to O (heat pump only). G energizes fan relay on PCB which completes circuit to indoor blower motor.
When G is de-energized, there is a 90 sec delay before fan relay opens.
C. Heat Pump Heating Mode
Thermostat energizes R to G and R to Y. G energizes fan relay on PCB which completes circuit to indoor blower motor. When G is de-energized,
there is a 90 sec delay before fan relay opens.
D. Heat Pump Heating with Auxiliary Electric Heat
Thermostat energizes R to G, R to Y, and R to W. G energizes fan relay on PCB which completes circuit to indoor blower motor. W energizes
electric heat relay(s) which completes circuit to heater element(s). When W is de-energized, electric heat relay(s) open, turning off heater elements.
When G is de-energized there is a 90 sec delay before fan relay opens.
E. Electric Heat or Emergency Heat Mode
Thermostat closes R to W. W energizes electric heat relay(s) which completes circuit to heater element(s). Blower motor is energized through
normally closed contacts on fan relay. When W is de-energized, electric heat relay(s) opens.
Fig. 20—Wiring Layout of Electronic Air Cleaner to Fan Coil
A98626
RFAN RELAY
NO
230VAC
COM
NC
NONCSPT
WIRE
NUT
TO
BLOWER
MOTOR
CONVERSION KIT
TRANSFORMER
FROM MOLEX
PLUG AND
TRANSFORMER
(IN UNIT)
TO EAC
208/230VAC COM
24VAC
COM 208/
230
COM
CES0130003-01
CONTROL BOARD
GTC
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