Heatrae Sadia ELECTROMAX SOLAR Installation & Servicing Instructions Manual page 64

8.16 CENTRAL HEATING EXPANSION VESSEL
1. Close the central heating isolation valves and drain the central heating primary circuit.
2. Unscrew the two screws holding the Electromax Solar control panel in place and allow it
to drop forward.
3. Unscrew the union nut connection between the expansion vessel and the flexible hose
coupling.
4. Lift the expansion vessel from the moulded support nest. NOTE: the expansion vessel
may contain some water, take care not to spill this into the Electromax Solar.
5. Fit the new expansion vessel and re connect the flexible hose coupling
8.17 CENTRAL HEATING CIRCULATING PUMP
1. Close the central heating isolation valves and drain the central heating primary circuit.
2. Unscrew the two screws holding the Electromax Solar control panel in place and allow it
to drop forward.
3. Disconnect the pump cable from the pump housing.
4. Undo the two pump union nuts.
5. Replace the pump. Re connect the two union nuts and re connect the pump cable. Re fit
the Electromax Solar control panel.
FIGURE 41: CENTRAL HEATING CIRCULATING PUMP
CENTRAL HEATING
EXPANSION VESSEL
UNION NUT
(EXPANSION VESSEL)
64
FLEXIBLE
HOSE UNION NUTS (PUMP)
CENTRAL HEATING
CIRCULATING PUMP
PUMP CABLE
CONNECTION
CONTROL PANEL