4. Solar 3C Control Panel
Solar 3C Control Panel contains a single channel programmer, weather compensation controller,
transformer and cylinder differential temperature controller. The control panel box is pre-wired for
ease and speed of installation and manages the valves, boiler demand, heating demand, outside
temperature compensation elements of the Solar 3C system to supply the correct temperature flow
to the space heating. It also controls the DHW side of the system.
4.1. Installing the Solar 3C Control Panel
The Solar 3C Control Panel is designed to be fixed to the wall with four screws through the back
plate. Once fixed, the front hinges downwards allowing easy access to the connection block
at the top of the unit. A Part P qualified electrician should connect the system as illustrated in the
electrical schematic.
4.2. Wiring the Control Panel
The four sensors are placed in the following locations:
O70E - External Temperature Sensor: This box should be mounted on an external, north facing wall
and wired back to the control unit. 1.0mm² cable suitable for up to 50 m
ETF522 - Storage sensor: This sensor should be placed in the top pocket in the Solar 3C Cylinder in
the centre of the top coil. (See fig 1 in Section A of cylinder manual)
ETF422SP - This sensor has a thread and should be placed in the centre of the flow in the fitting
below the pump on the right of the Solar 3C Jig. (See fig.6)
O71E - This sensor should be clamped onto the pipe next to the EFT422SP threaded sensor on the
Solar 3C Jig. (See fig.6)
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Summary of Contents for 3C382B
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