03.03.2021 Rev. 01
20
TERMINAL PIN
SIGNAL
EXPLANATION
X2
1
Earth
Earth
2
Earth
X3
1
Input
Outdoor Temperature
Sensor
2
Earth
3
RX-TX
Opentherm
4
Earth
5
Input
----
6
Earth
7
Input
Room Thermostat
8
Earth
X4
1
24VDC
DC Gas Valve
2
Earth
3
-
4
PWM
Fan Driver Interface
5
24VDC
6
Tacho
7
GND
X5
1
24VDC
2
Input
Flue Temperature Sensor
3
Earth
4
Input
Return Temperature Sensor
5
Earth
6
Input
Supply Temperature Sensor
7
Earth
8
Input
DHW Temperature Sensor
9
Earth
X7
1
WP Supply
Water Pressure Sensor
2
BS Input
3
BS GND
4
PWM Supply
Supply Pump PWM
5
PWM Output
6
FS Supply
DHW Flow Switch
7
FS Input
8
FS GND
9
Input
Solar Sensor
10
Earth
TERMINAL PIN
SIGNAL
EXPLANATION
X10
1
CH Supply
3 Way Valve
2
DHW Supply
3
Neutral
X11
1
Phase
Fan Power Supply
2
Neutral
3
Phase
Supply Pump Power
Supply
4
Neutral
X12
1
Neutral
Main Power Supply
2
Phase
HT
1
HT1
Ignition Rod
Summary of Contents for WT-S 35
Page 10: ...03 03 2021 Rev 01 9 4 PARTS...
Page 11: ...03 03 2021 Rev 01 10 5 BOILER HYDRAULIC SCHEMA...
Page 14: ...03 03 2021 Rev 01 13...
Page 20: ...03 03 2021 Rev 01 19 10 ELECTRICAL DIAGRAM AND RELATED CONNECTIONS...
Page 22: ...03 03 2021 Rev 01 21...
Page 23: ...03 03 2021 Rev 01 22...
