35
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.
Pump power (Solpump) (UPM3 25-75)
20 W
Pump power (Solpump) (YONOS PARA ST/ 25—75)
25W
Standby power (Solstandby) (SC400/5====00)
0.8W
for energy labelling
