Heatrae Sadia ELECTROMAX SOLAR Installation & Servicing Instructions Manual page 53

6.10 SOLAR PRESSURE RELIEF VALVE
1. Slowly open the solar pressure relief valve by twisting its cap.
2. Check fluid is discharged and that it flows freely through the discharge pipework.
3. Release the valve cap and check that the fluid flow stops and valve re-seats correctly.
6.11 SOLAR SYSTEM EXPANSION VESSEL CHARGE PRESSURE
1. Drain the solar primary circuit until the solar pressure gauge reads 0 (see section 8.3 page
58)
1. Remove the dust cap from the solar expansion vessel
2. Check the charge pressure of the expansion vessel using a tyre pressure gauge. The
pressure (with system de-pressurised) should be 0.35 MPa (3.5bar). If lower than the
required setting it should be re-charged using a tyre pump (Schraeder valve type). DO
NOT over charge. Re-check the charge pressure and when correct replace the dust cap.
3. Top up the heat transfer fluid and re set the solar system pressure ( see section 4.7.1 , 4.7.3
and 4.7.4, pages 40 and 41). Ensure that the correct Heat Transfer fluid is used accessory
code 5119549 for flat plate collectors and 5130225 for evacuated tube collectors.
6.12 RE COMMISSIONING THE ELECTROMAX SOLAR
1. Check that the domestic hot water, central heating and solar circuits are full and at the
correct pressure.
2. Replace and secure all panels.
3. Check the settings of the programmable room thermostat.
4. Check operation of the immersion heaters and electric boiler (section 4.5.2 & 4.5.3 page
37)
5. Check operation of the solar pump (section 4.8.7 page 46).
6. Fill in the maintenance record (page 78-79)
Following servicing all covers must be replaced and fully secured and the service record filled
in on page 78-79.
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