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4
See appendix for listing of additional components.
Quick Reference Boiler Piping and Wiring Guide
CH2
6 5
System
Sensor
4 3
Modulation
Signal
-
+
2 1
CH 2
Thermo sta
t
CH1
Thermostat
4 3
Outdoor
Sensor
2 1
DHW
Sensor
or
Aquastat
2 1
Modbus
+ G -
3 2 1
X7
X4
X6
X5
CH2
6 5
System
Sensor
4 3
Modulation
Signal
-
+
2 1
CH 2
Thermo sta
t
CH1
Thermostat
4 3
Outdoor
Sensor
2 1
DHW
Sensor
or
Aquastat
2 1
Modbus
+ G -
3 2 1
X7
X4
X6
X5
Thermostat
N
G
L
N
G
L
N
G
L
N
G
CH-2 PUMP
POWER
CH PUMP
DHW PUMP
FLAME
L
N
G
L
N
G
L
N
G
L
N
G
CH-2 PUMP
POWER
CH PUMP
DHW PUMP
FLAME
L
WATER
SUPPLY
O S
COMBI BOILER
SINGLE ZONE WITH CLOSELY SPACE TEES
Power
120VAC
*
No Pump Setting Changes Needed With This Configuration
CH2
6
5
System
Sensor
4
3
Modulation
Signal
-
+
2
1
CH 2
Thermo sta
t
CH1
Thermostat
4
3
Outdoor
Sensor
2
1
DHW
Sensor
or
Aquastat
2
1
Modbus
+
G
-
3
2
1
X7
X4
X6
X5
CH2
6
5
System
Sensor
4
3
Modulation
Signal
-
+
2
1
CH 2
Thermo sta
t
CH1
Thermostat
4
3
Outdoor
Sensor
2
1
DHW
Sensor
or
Aquastat
2
1
Modbus
+
G
-
3
2
1
X7
X4
X6
X5
Thermostat
N
G
L
N
G
L
N
G
L
N
G
CH-2 PUMP
POWER
CH PUMP
DHW PUMP
FLAME
L
N
G
L
N
G
L
N
G
L
N
G
CH-2 PUMP
POWER
CH PUMP
DHW PUMP
FLAME
L
WATER
SUPPLY
O S
COMBI BOILER
SINGLE ZONE WITH CLOSELY SPACE TEES
Power
120VAC
*
No Pump Setting Changes Needed With This Configuration
CH2
6
5
System
Sensor
4
3
Modulation
Signal
-
+
2
1
CH 2
Thermo sta
t
CH1
Thermostat
4
3
Outdoor
Sensor
2
1
DHW
Sensor
or
Aquastat
2
1
Modbus
+
G
-
3
2
1
X7
X4
X6
X5
CH2
6
5
System
Sensor
4
3
Modulation
Signal
-
+
2
1
CH 2
Thermo sta
t
CH1
Thermostat
4
3
Outdoor
Sensor
2
1
DHW
Sensor
or
Aquastat
2
1
Modbus
+
G
-
3
2
1
X7
X4
X6
X5
Thermostat
N
G
L
N
G
L
N
G
L
N
G
CH-2 PUMP
POWER
CH PUMP
DHW PUMP
FLAME
L
N
G
L
N
G
L
N
G
L
N
G
CH-2 PUMP
POWER
CH PUMP
DHW PUMP
FLAME
L
WATER
SUPPLY
O S
COMBI BOILER
SINGLE ZONE WITH CLOSELY SPACE TEES
Power
120VAC
*
No Pump Setting Changes Needed With This Configuration