Trane ReliaTel - Electromechanical Time Delay Relay; Time Delay Relay; Fan Off Delay Solid State Timer

136 RT-SVD03G-EN
Electromechanical Time Delay Relay
Time Delay Relay
This time delay circuit board attaches to the side of the relay. When energized, the fan starts
immediately and when de-energized shuts off 80 seconds later. This delay is not adjustable.
Fan “Off” Delay Solid State Timer
When “G” is energized, the N.O. contacts between 1 and 2 close immediately, energizing the fan
relay (F), which in turn starts the indoor fan. When “G” is de-energized, the contacts between 1 and
2 remain closed for 80 seconds, then open. This in turn de-energizes the F relay, which stops the
indoor fan.
Figure 77. Transformer and Thermostat Layout
Figure 78. Time Delay Relay
Figure 79. Electromechanical Time Delay Solid State
Thermostat
Fan
24 VAC Output
Transformer
P.C.
Board
Relay
Time Delay Relay
T
B
A
P2
120 VAC Input
TB
P2
A
"G"
"R"
"C"
F