Figure
16
. 2 Port Zone Valve
CAUTION :
Boiler has only volt free contact for switcing. Contactor relay switch must
be installed according to these indica
�
ons. There is no 230 V AC input on board.
1- Remove the front panel.
2- Hinge down the control box.
3- Remove the link between terminals 1 and 2.
4- Use volt free contacts (Room Thermostat contacts) to install a system with zone valves.
Volt Free
Contact
8.
7
Electrical Connections with Zone Valves
30