8
See appendix for listing of additional components.
Quick Reference Boiler Piping and Wiring Guide
8
See appendix for listing of additional components.
Ch-2 High Temp
CH2
6 5
System
Sensor
4 3
Modulation
Signal
-
+
2 1
CH2
Thermo sta
t
CH1
Thermosta
t
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
CH2
Thermo sta
t
CH1
Thermosta
t
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
Ch-1 Low Temp
Ch-1 Low Temp
COMBI BOILER
USING 2 TEMPS / 2 HEATING CURVES
WATER
SUPPLY
O S
Power
120VAC
* Pump Setting Changes Needed With This Configuration
*
*
*
(OFF)
Ch-2 High Temp
CH2
6 5
System
Sensor
4 3
Modulation
Signal
-
+
2 1
CH2
Thermo sta
t
CH1
Thermosta
t
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
CH2
Thermo sta
t
CH1
Thermosta
t
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
Ch-1 Low Temp
Ch-1 Low Temp
COMBI BOILER
USING 2 TEMPS / 2 HEATING CURVES
WATER
SUPPLY
O S
Power
120VAC
* Pump Setting Changes Needed With This Configuration
*
*
*
(OFF)
Ch-2 High Temp
CH2
6 5
System
Sensor
4 3
Modulation
Signal
-
+
2 1
CH2
Thermo sta
t
CH1
Thermosta
t
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
CH2
Thermo sta
t
CH1
Thermosta
t
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
Ch-1 Low Temp
Ch-1 Low Temp
COMBI BOILER
USING 2 TEMPS / 2 HEATING CURVES
WATER
SUPPLY
O S
Power
120VAC
* Pump Setting Changes Needed With This Configuration
*
*
*
(OFF)
** (O
N
)
** (OFF)