CR Remeha Avanta 12v, Installation And Service Manual

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fig. 23 Wiring diagram DHW calorifier sensor or thermostat
R000194-A
2.7.7 Connecting a three-way valve
If required a 230 V DIVERTING three-way valve can be connected to terminal X5 of
the control unit. When used in conjunction with an "Open Therm" compensator the
DHW-production operates with priority.
Connector X5-1 for N (neutral), connector X5-2 for "open valve to DHW" (port A of
three-way valve) and connector X5-3 for "open valve to CH" (port B of three-way
valve)
If port A is connected to heating and port B to hot water X5-3 should be
used to enable DHW.
The cable must be fed through the boiler's casing by means of the supplied cable
gland and run trough the cable clamp on the right-hand inside of the boiler.
fig. 24 Wiring diagram three-way valve
R000160-A
2.7.8 Connecting a frost thermostat
The boiler must be installed in a frost-free area to prevent the condensate drain from
freezing. However if the temperature of the CH water in the boiler drops too low, the
integrated boiler protection device is activated as follows:
- at a water temperature below 7°C: the circulation pump is switched on;
- at a water temperature below 3°C: the boiler is switched on;