Secure H3747 - Summer Mode and Warnings

Make connections
Note: Connections shown for mains operated 4x heating zone system. These may vary for
dierent boiler types.
4 zone heating system
A3
E
N
L
Mains supply
N L
1
2
3 4
5
6
Receiver back plate
N L
Boiler
*
Zone 1
valve
Zone 2
valve
Zone 3
valve
Zone 4
valve
ON ON ON ON
Call Call Call Call
This diagram is schematic and should be used for guidance only.
*Note : The receiver has voltage free contacts. A
link between terminal L, 2 and 4 is required for
mains voltage applications.
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