WIRING
ST-3E
R1
B
R
O
W
G
C
ZONE1
T’STAT
Y
R
G
O/B
W/E
C
ZONE
T’STAT
NCM-300
Gas/Elec. 1H/1C
C
RH/B
Y
G
R
W
RC/O
E
W
T
-3
6
1
1
C
RH/B
Y
G
R
W
RC/O
E
W
T
-3
6
1
1
Y
NON-ZONED
GAS OR OIL
1 HEAT/ 1 COOL
NON-ZONED
HYDRO OR OIL
C
RH/B
Y
G
R
W
RC/O
E
W
T
-3
6
1
1
C
RH/B
R
W
G
C
RC/O
E
W
T
-3
6
1
1
Y
G
R
W
1 HEAT/ 1 COOL
AIR HANDLER
Y
R
W
C
ZONE2
T’STAT
Y
C
RH/B
Y
G
R
W
RC/O
E
W
T
-3
6
1
1
COMPRESSOR
Y
G
R
W
Y
C
GAS FURNACE
C
T
T
TO
BOILER OR
CIRCULATOR CONTROL
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362 E-Mail- [email protected]
3
Copyright © 2009 EWC Controls All Rights Reserved
ISOLATION CIRCUIT
REQUIRED
NO ISOLATION CIRCUIT
REQUIRED
Jumper
NON-ZONED
HEAT PUMP
C
RH/B
Y
G
R
W
RC/O
E
W
T
-3
6
1
1
R
W
G
C
1 HEAT/ 1 COOL
HEAT
PUMP
Y
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
R
O
G
C
Y
AIR HANDLER
This thermostat model
does not
have auxiliary or emergency
heat features, therefore it cannot be used on heat pump
systems that require these functions.
