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 H igh Tem p
CH2
6 5
System
Sen sor
4 3
Modulation
Signal
- +
2 1
CH 2
Thermosta
t
CH1
Ther mosta
t
4 3
Outd oor
Sen sor
2 1
DHW
Sensor
or
Aquastat
2 1
Modbus
+ G -
3 2 1
X7X4
X6X5
CH2
6 5
System
Sen sor
4 3
Modulation
Signal
- +
2 1
CH 2
Thermosta
t
CH1
Ther mosta
t
4 3
Outd oor
Sen sor
2 1
DHW
Sensor
or
Aquastat
2 1
Modbus
+ G -
3 2 1
X7X4
X6X5
Th er mostat
N G L N G L N G L N G
CH-2 P UMP
P OWER
CH PUMP
DHW
PUMP
FL AME
LN G L N G L N G L N G
CH-2 P UMP
P OWER
CH PUMP
DHW
PUMP
FL AME
L
Ch-1 L ow TempCh-1 L ow Temp
COMBI BOILER
USING 2 TEMPS / 2 HEATING CURVES
WATE R
SU PP LY
O S
Power
120VAC
* Pump Setting Changes Needed With This Configuration
* *
* (OFF)
Ch-2 H igh Tem p
CH2
6 5
System
Sen sor
4 3
Modulation
Signal
- +
2 1
CH 2
Thermosta
t
CH1
Ther mosta
t
4 3
Outd oor
Sen sor
2 1
DHW
Sensor
or
Aquastat
2 1
Modbus
+ G -
3 2 1
X7X4
X6X5
CH2
6 5
System
Sen sor
4 3
Modulation
Signal
- +
2 1
CH 2
Thermosta
t
CH1
Ther mosta
t
4 3
Outd oor
Sen sor
2 1
DHW
Sensor
or
Aquastat
2 1
Modbus
+ G -
3 2 1
X7X4
X6X5
Th er mostat
N G L N G L N G L N G
CH-2 P UMP
P OWER
CH PUMP
DHW
PUMP
FL AME
LN G L N G L N G L N G
CH-2 P UMP
P OWER
CH PUMP
DHW
PUMP
FL AME
L
Ch-1 L ow TempCh-1 L ow Temp
COMBI BOILER
USING 2 TEMPS / 2 HEATING CURVES
WATE R
SU PP LY
O S
Power
120VAC
* Pump Setting Changes Needed With This Configuration
* *
* (OFF)
Ch-2 High Tem p
CH2
6 5
System
Sen sor
4 3
Modulation
Signal
- +
2 1
CH 2
Thermosta
t
CH1
Thermosta
t
4 3
Outdoo r
Sen sor
2 1
DHW
Sensor
or
Aquastat
2 1
Modbus
+ G -
3 2 1
X7X4
X6X5
CH2
6 5
System
Sen sor
4 3
Modulation
Signal
- +
2 1
CH 2
Thermosta
t
CH1
Thermosta
t
4 3
Outdoo r
Sen sor
2 1
DHW
Sensor
or
Aquastat
2 1
Modbus
+ G -
3 2 1
X7X4
X6X5
Ther mostat
N G L N G L N G L N G
CH-2 P UMP
P OWER
CH PUMP
DHW
PUMP
FLAME
LN G L N G L N G L N G
CH-2 P UMP
P OWER
CH PUMP
DHW
PUMP
FLAME
L
Ch-1 Low TempCh-1 L ow Temp
COMBI BOILER
USING 2 TEMPS / 2 HEATING CURVES
WATE R
SU PP LY
O S
Power
120VAC
* Pump Setting Changes Needed With This Configuration
* *
* (OFF)
*
*
(ON)
*
*
(OFF)