Part Replacement - Heatrae Sadia ELECTROMAX SOLAR Installation & Servicing Instructions Manual

8.0 PART REPLACEMENT

WARNING: DISCONNECT FROM ALL ELECTRICAL SUPPLIES BEFORE BEGINNING
ANY WORK ON THE ELECTROMAX SOLAR. FLUID CONTAINED IN THE DOMESTIC
HOT WATER, CENTRAL HEATING AND SOLAR CIRCUITS MAY BE VERY HOT!
Replacement of parts should be carried out by a competent person. Any replacement parts
used should be authorised Heatrae Sadia Electromax Solar spare parts.
Having identified the fault (section 7, pages 54 - 56) and obtained the correct replacement part/s
switch off the power supplies and remove the appropriate panels (section 3.2 page 11).
Drain the domestic hot water / central heating / solar circuit if required and replace the part.
NOTE: The domestic hot water / central heating / solar circuit may be hot. Allow to cool first
before draining.
Having replaced the part, re commission the Electromax Solar (section 4, pages 34 - 48) and
confirm any fault has been rectified.
Replace the top and front panels and fill in the maintenance and servicing record (page 78-
79)
8.1 DRAINING THE DOMESTIC HOT WATER CYLINDER
1. Turn off the mains water supply to the Electromax Solar and release the system pres-
sure by opening a hot tap. Some hot water will flow for a short while, this is normal.
2. Remove front and top panels.
3. Connect a hose to the domestic hot water drain point and unscrew square headed stop
plug to drain the cylinder. If water fails to drain from the cylinder, vent the unit by manually
opening the temperature and pressure relief valve.
8.2 DRAINING THE CENTRAL HEATING PRIMARY CIRCUIT
1. Close the central heating isolating valves. This will allow the central heating primary
circuit to be drained and worked on without draining the complete radiator or underfloor
circuit.
2. Open the central heating pressure relief valve and allow water to flow until the system
pressure gauge drops to zero.
3. Remove the sealing cap from the front of the central heating drain valve and replace it
with the hose connector supplied.
4. Connect a hose to the hose connector and secure in place with a hose clip. Open the
central heating drain valve and allow the central heating primary circuit to drain.
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