Page 22 of 51
18-19-
20
Remote Fault
Lock-out and
remote signal
for Heat
demand.
Through the use of an external power (e.g. BMS, 230 VAC or 24 v), one Volt Free
contact closes in a Lock Out condition and the other on Heat Demand.
A BMS, lamp or a buzzer can be connected
21-22-23 Diverter
Valve
primary hot
water circuit
or primary
pump relay
Diverter Valve (3 Port ) for charging a Calorifier
DHW primary pump relay is connected to 22 & 23
When a zone 2 circuit (low temp) is installed, the pump for this circuit has to be
connected to the terminals “N” and “L2” and the PE to the main PE terminal at the
right side of the panel.
24-25-
26
not used
secondary
circuit
Mixing Valve for zone 2 (low temp) where the L2 is the Closing hydraulic
connection: (closing when the temperature is rising.)
27-28-
29
HTG Pump
Heating pump relay 27– 28
30-31 No
connection
No connection
32-33 No
connection
No connection
34-35-
36
Permanent
Supply
The permanent supply is connected to these terminals. This supply must not be
interrupted for control purposes.
HEAT DEMAND
LOCK OUT
N
SUPPLY
