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3.
CONNECTION DIAGRAM
Applicable to TRC500 and TRC800 models
STC7D-W
1
2
3
4
5
STC7D-W
1
2
3
4
5
STC7D-W showing plate dimensions and
screw spacings.
BLACK
RED
YEL
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.
BLACK
RED
YEL
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.
ERV INTERNAL CONTROL
WIRING (SIMPLIFIED)
Unit's 24VAC
RED
Power Suppl y
BLUE
YEL
Isolation
C
YEL
Relay Coil
ERV INTERNAL CONTROL
WIRING (SIMPLIFIED)
Unit's 24VAC
Power Suppl y
1
2
3
Isolation
C
4
Relay Coil
5
2
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