Heatrae Sadia ELECTROMAX SOLAR Installation & Servicing Instructions Manual page 67

8.23 CONTROL PANEL
1. Turn the solar check valves to 45°, close the central heating isolation valves and drain
both the central heating and solar primary circuits.
2. Disconnect the solar pump cable at the solar pump.
3. Disconnect the central heating pump cable at the pump.
4. Undo the immersion heater covers and disconnect the immersion heater wires.
5. Remove the solar thermal cut out bracket and diconnect the two wires.
6. Remove the domestic hot water solar sensor from the sensor pocket.
7. Unscrew the two screws holding the Electromax Solar control panel in place and allow it
to drop forward.
8. Unscrew the two screws holding the control panel back cover in place and remove the
back cover.
9. Disconnect the two 240v 16a supplies
10. Disconnect the solar collector sensor wires ( and the solar divertor valve wires if fitted )
from the solar PCB.
11. Disconnect the electric boiler control PCB ribbon cable from the electric boiler main
PCB.
12. Disconnect the room thermostat wires.
13. Disconnect the earth wires.
14. Disconnect the solar and central heating capillaries from the solar and central heating
pressure relief valves.
15. Remove the control panel from it's hinges taking care so that the disconnected wires do
not get caught in the process.
16. Fit the new control panel and re connect all cables and capillaries.
8.24 ELECTRIC BOILER CONTROL PCB
1. Unscrew the two screws holding the Electromax Solar control panel in place and allow it
to drop forward.
2. Unscrew the screw holding the control panel back cover in place and remove the back
cover.
3. Unscrew the two screws holding the electric boiler PCB housing cover in place and re-
move the cover.
4. Disconnect the electric boiler control PCB ribbon cable from the electric boiler main
PCB.
5. Unscrew the four screws holding the electric boiler control PCB in place and remove the
PCB.
6. Fit the new PCB and secure in place with four screws. Re connect the ribbon cable to the
electric boiler main PCB. Refit the electric boiler PCB housing cover, the control panel
back cover and the Electromax Solar control panel.
8.25 SOLAR CONTROL PCB
1. Unscrew the two screws holding the Electromax Solar Control Panel in place and allow it
to drop forward.
2. Unscrew the screw holding the control panel back cover in place and remove the back
cover.
3. Disconnect the wires and the ribbon cable to the Solar control PCB.
4. Unscrew the four screws holding the solar control PCB in place.
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