Ingersoll-Rand ReliaTel, Manual, Page: 136 / 176

136 RT-SVD03L-EN
Electromechanical Units
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.
Figure 86. Time delay relay
T B
P2
A
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 87. Transformer and thermostat layout
Thermostat
Fan
24 VAC Output
Transformer
P.C.
Board
Relay
Time Delay Relay
T B
A
P2
120 VAC Input
Figure 88. Electromechanical time delay solid state
"R"
"C"
F
“G”
6
5 4
1 2 3