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INSTALLER'S GUIDE
Section 7. Sequence of Operation
7.1 Sequence of Operation
GAF2 Sequence of Operation
See unit, electric heat, and field wiring diagrams
for additional information.
Continuous Fan
1. R-G contacts close on comfort control sending
24VAC to the blower relay
2. Relay contacts 1 and 3 close.
3. The blower will now run on the selected speed.
Speed is field selectable.
Heatpump OD (cooling)
1. R-Y contacts close on the comfort control send-
ing 24VAC to the OD unit.
2. R-G contacts close on comfort control sending
24VAC to the blower relay
3. Relay contacts 1 and 3 close
4. The blower will now run on the selected speed.
Speed is field selectable
5. R-O contacts on the comfort control close
sending 24VAC to the switch over valve on the OD
unit.
Heatpump OD (heating)
1. R-Y contacts close on the comfort control send-
ing 24VAC to the OD unit.
2. R-G contacts close on comfort control sending
24VAC to the blower relay
3. Relay contacts 1 and 3 close.
4. The blower will now run on the selected speed.
Speed is field selectable.
Cooling OD
1. R-Y contacts close on the comfort control
sending 24VAC to the OD unit.
2. R-G contacts close on comfort control sending
24VAC to the blower relay
3. Relay contacts 1 and 3 close
4. The blower will now run on the selected speed.
Speed is field selectable
Electric Heating
1. R-W contacts close on the comfort control
sending 24VAC to energize the heat contactor.
2. R-G contacts close on comfort control sending
24VAC to the blower relay
3. Relay contacts 1 and 3 close
4. The blower will now run on the selected speed.
Speed is field selectable
5. Contacts 4 & 6 on the blower relay close pro-
viding the interlock circuit to allow the electric heat
relays to operate
Important:
The comfort control must be setup to
control R-G contacts with a call for electric heat.
This closes the interlock circuit and allows the
heat relay circuit to be energized.
