11
8.3
Two Port Valve
-The two port valve should be wired to the twin thermostat as per Figure 8.2
below:
8.3.1 Connect the Live supply to the thermal-cut-out and connect the brown wire of the two-port
valve to terminal 2 on the thermostat. Earth and Neutral supplies can be connected directly to
the valve.
8.3.2 The orange wire of the two-port valve should be connected to the central heating boiler.
8.3.3 The cylinder thermostat should be set to 60
o
C
Fig 8.2
Fig 8.3
8.4
The Power Supply to the pump station should be connected via the lower
9. Filling and commissioning
9.1.
Check that the expansion vessel charge pressure is 3bar.
9.2.
Check that all connections are tight and correctly configured.
9.3.
Open the main stopcock and fill the secondary system. Open successive hot taps. Leave each
tap open for a few minutes to allow all air and debris from the system to exit. Close all taps.
Thermostat
L
N
E
1
2
3
4
5
6
7
8
9 10
X
X
X
X
X
X
X
Thermal cut-out
C
E 1
2
Solar Circulating Pump 230 V supply?
Thermostat
Bn
Bl G/Y
O
G
L
N
E
1
2
3
4
5
6
7
8
9 10
X
X
X
X
X X
X
Thermal cut-out
C
E 1
2
Two-port motorised valve
Boiler switched live