Installation
6 720 805 339 (2014/09)
17
Fig. 12 Variant dual thermostat wiring: wiring diagram 3 port mid position valve (Y-plan) + 2 port valve
Fig. 13 Wiring diagram solar high limit control
6 720 645 525-10.3GX
E 1
2
C
1 2 3 4 5 6 7 8 9 10
E
N
L
G3 protection from excessive solar input.
A solar high limit thermostat will isolate the solar controller and solar pump.
The solar pump station MUST incorporate a gravity break check valve.
G3 protection from excessive solar input.
Additional wiring for solar pump stations without
a gravity break check valve.
A solar high limit thermostat will isolate the solar
controller close the 2-port zone valve
and isolate the solar pump.
230 Vac 3Amp
Double Pole
Fused Spur
Solar High Limit
Thermostat
L E
N
Solar Circulating
Pump
L E
N
Solar Circulating
Pump
L E
N
L E
N
Mains Supply
In
Solar Pump
Output
Solar Controller
L E
N
Solar Pump
Output
Solar Controller
7 8 9 10
L E
N
L
SL
2 - Port Zone Valve
(Solar Return)
7
6 720 645 525-11.2WO
