21
Wiring the Solar Control Panel
All electrical aspects of the installation should be undertaken by a competent person.
Note that for safety, the pump and sensor connections should always be wired prior to
connecting power to the solar control panel.
IMPORTANT: The solar control panel must have a permanent electrical power
supply which must not be interrupted either manually or with a time switch. If the
permanent electrical supply to the building is to be switched off for any period of
time, the solar collector(s) should either be covered, or the system drained and the
tubes removed.
In order to protect the normal operation of the control panel, it should be located at least
100 mm from insulated pipes which may become hot during operation.
Control panels use PT1000 sensors containing twin core copper cable with a 0.75mm cross
section. The sensors supplied are 1.5 metres in length.
Sensor cables can be extended with twin core copper cable of 0.75mm diameter up to 50
metres and 1.50mm diameter between 50-100m. Screened cable should be used on the
sensor cables to prevent RFI from electrical cables. All connections to extend the cables
should be housed in a junction box for protection.
The following diagrams show the connection of the solar pump and other relays on the SC
range of controllers. This should be read in conjunction with the Installation and Operation
Manual supplied with each SC control panel.
