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Section 8. Heater Operation
8.1 GAM5B/5TAM5 Heater Operation
Electric Heating
1. R-W contacts close on the comfort control sending
24VAC to the W terminal on the electronic fan relay.
24VAC is also sent to energize the heat relay.
2. R-G contacts close on the comfort control sending
24VAC to the G terminal on the electronic fan relay.
(The combination of 24VAC on terminals W and G
on the electronic fan relay will close the high speed
contacts of the electronic fan relay)
3. WJ contacts on the electronic fan relay close providing
an interlock circuit to allow the electric heat relays to
operate.
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.
INSTALLER'S GUIDE
8.2 TAM9, TAMX/5TAMX/TAMGB Heater
Operation
Electric Heating
Note: The TAM9, TAMX/5TAMX/TAMGB can use a
communicating or 24 volt comfort control to send a
heater request to the AFC/AHC.
1. When a request for electric heat is received, the
AFC/AHC will energize the on board 24 volt relays per
the amount of heat requested from the thermostat and
the size of the heater installed.
2. The AFC/AHC sends a command to the serial
communicating blower motor to run proper airflow
and close the blower interlock relay on the EHC.
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