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7Bii. Thermostat and Air Handler Connections
The FAVC has 5 terminals to interface between the thermostat and air handler. The Thermostat and
Air Handler terminal block is in the THERMOSTAT AND AIR HANDLER CONNECTION region of the
FAVC as shown in Figure 1 and Figure 22. The terminal designations are as follows:
The FAVC does not need to be connected to the Y (compressor or
cooling) as the GT (thermostat fan signal) will suffi ce for all
applications including heat pumps. There may be functions
that do not use the fan signal such as heating with gas or oil
furnace systems. Both the GT and W terminals are used to monitor
thermostat activity. Note: The GT signal is passed to the GF
terminal though relay contacts when the FAVC is idle or not in
control of the central fan. All 5 of the terminals are sourced from
the air handler or furnace require 24VAC power supply.
P/N 780100700 07/18 Rev F
•
C is the common
•
W is the heat signal from the thermostat
•
GT is the fan signal from the thermostat
•
GF is the fan signal to the Furnace or air handler
•
R is the 24VAC hot
Page 22 of 36
FIGURE 22:
Thermostat and Air Handler
Terminal on FAVC (Rotated 90°)
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