Quick Reference Boiler Piping and Wiring Guide
COMBI BOILER
SINGLE ZONE WITH LOW LOSS HEADER
IBOII.ER PUilP SETTING
I
HeatC1U
FLAME
CHfUMP
DHWPUIMP
Ctit-1
ON
ON
OFF
CH-2
ON
ON
OFF
Dti!W
Off
On
ON
• No Pump Setting Changes Needed With This Configuration
CH2
System
Modulation
CH1
Outdoor
DHW
Modbus
Thermostat
Sensor
6
5
4
3
X5
- -
-
-
0 0
0 0
- - - -
Signal
2
1
- -
0
0
- -
Thermostat
Sensor
4
3
2
1
I
I
I
I
I
I
I
I
9
Sensor
"
.Aquastat
2
1
G
3
2
1
XJ
- - -
0
0 0
- - -
120VAC
I ___ J
I
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See appendix for listing of additional components.
5
