Heatrae Sadia ELECTROMAX SOLAR Installation & Servicing Instructions Manual page 52

6.4 OPERATION OF HOT WATER SAFETY VALVES
1. Slowly open the temperature and pressure relief valve by twisting its cap for a few seconds.
Check water is discharged and that it flows freely through the tundish and discharge pipework.
Release the valve cap and check water flow stops and valve re-seats correctly.
2. Repeat step 2 for the expansion relief valve located on the cold water combination
valve.
6.5 OPERATION OF PRIMARY SYSTEM SAFETY VALVE
1. Close the central heating flow and return isolating valves.
2. Slowly open the central heating system pressure relief valve by twisting its cap for a few
seconds.
3. Check water is discharged and that it flows freely through the tundish and discharge
pipework.
4. Release the valve cap and check water flow stops and valve re-seats correctly.
6.6 PRIMARY SYSTEM EXPANSION VESSEL CHARGE PRESSURE
1. Drain the central heating primary circuit (see section 8.2 page 57) until the central heating
pressure gauge reads 0 MPa (0bar).
2. Remove the dust cap from the central heating expansion vessel.
3. Check the charge pressure of the expansion vessel using a tyre pressure gauge. The
pressure (with system de-pressurised) should be 0.1 MPa (1.0bar). 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.
4. Connect the filling loop. Open the filling loop isolating valves and allow system to repressurise
to approximately 0.15 MPa (1.5 bar).
5. Close the filling loop isolating valves and remove the flexible hose.
6.7 ELECTRICAL CHECKS
1. Inspect all electrical terminations for signs of over-heating.
2. Check all terminations are tight.
3. Check cable glands are tightened and grip cables secure.
6.8 SOLAR HEAT TRANSFER FLUID
Using an antifreeze tester check that the value is approximately -21ºC (40% concentration)
6.9 SOLAR COLLECTOR
Check the collector for signs of leaks, damage and contamination.
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