THERMOSTAT TERMINALS (HEAT PUMP)
SYSTEM
C
R
E/W1
W2
Y1
L
G
O
B
Heat Pump 1 (HP1)
24 Volt (Common)
24 Volt (Hot)
Emergency 1st stage
Auxiliary / Emergency 2nd Stage
Compressor No Function
Malfunction
Blower/Fan Energized on call for Heat and Cool
Energized in Cool Mode
Energized in Heat Mode
Heat Pump 2 (HP2)
UZC-4
Heat Pump 2H/1C
“O” Reversing Valve
Y1
O/B
W1/E
W2
Y2
R
G
C
E/W1
E
W
T
-3
7
0
7
C
R
W2
Y1
G
L
B
Figure 11
O
BMPlus3000
Heat Pump 2H/1C
“B” Reversing Valve
Y1
O/B
W1/E
W2
Y2
R
G
C
E/W1
E
W
T
-3
7
0
7
C
R
W2
Y1
G
L
B
Figure 12
O
E/W1
E
W
T
-3
7
0
7
C
R
W2
Y1
G
L
B
O
BmPlus 3000
Y
R
G
O/B
W/E
C
Heat Pump 2H/1C
“B” Reversing Valve
Figure 13
E/W1
E
W
T
-3
7
0
7
C
R
W2
Y1
G
L
B
O
NCM-300
Gas/Elec. 2H/1C
Radiant/Baseboard
w/ Hydro Hot Air
Figure 10
O
G
R
L
C
W2
E/W1
E/W1
E
W
T
-3
7
0
7
C
R
W2
Y1
G
L
B
O
Y
R
G
W/E
C
T
T
ISOLATION RELAY
O/B
Non-Zoned Heat Pump w/
Malfunction Circuit
2H/1C
“O” Rev Valve
Figure 9
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]
5
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