2
3. CONNECTION DIAGRAM
Applicable to TRC500 and TRC800 models
STC7D-W showing plate dimensions and
screw spacings.
1
2
3
4
5
C
C
YEL
YEL
YEL
BLUE
RED
RED
ERV INTERNAL CONTROL
WIRING (SIMPLIFIED)
ERV INTERNAL CONTROL
WIRING (SIMPLIFIED)
Unit’s 24VAC
Power Supply
Isolation
Relay Coil
Unit’s 24VAC
Power Supply
Isolation
Relay Coil
The Normally Closed contacts of one or
more additional Low V oltage Controls may
be connected to E RV unit in parallel with
the STC&D-W.
The Normally Closed contacts of one or
more additional Low V oltage Controls may
be connected to E RV unit Terminals 1 &
4. Do not apply power to these terminals.
BLACK
STC7D-W
1
2
3
4
5
YEL
1
2
3
4
5
RED
BLACK
STC7D-W
