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4.5 Electrical Installation
4.5.1 Cylinder thermostats
Figure 3: Control thermostat wiring
4.5.2 Immersion heater(s)
Figure 4: Immersion heater wiring
4.5.3 Solar temperature sensors
Solar sensors should be located in the pocket(s) behind the cylinder thermostat(s). Remove the
thermostat cover and base. Pass the sensor through the base then insert downwards into the
pocket as shown in Figure 5. Anchor the cable using the clamp provided.
Figure 5: Solar temperature sensor installation
Main (lower)
solar sensor location
Twin Coil
Triple Coil
Additional (upper)
solar sensor location
(if applicable)
To isolating
switch
B
A
Live
Neutral
Earth
Do not
use
To system controls
B
2
Earth
S-Plan
3
Link wire
(supplied)
Do not
use
To system controls
B
2
Connection to terminal 3
is only required if using a
3-port mid-position valve.
(Y-plan system wiring)
Earth
Y-Plan
