4 Inspection and Maintenance
4.1Checking the temperature / pressure relief valve and expansion relief valve
Actuate each valve manually by turning the valve cap and check whether the water flows unhindered to the discharge point via the tundish. Make sure both valves fit properly in idle position.
4.2Checking the charge pressure of the expansion vessel
Block the water supply and open the nearest hot water tap to reduce the pressure from the secondary water system.
Check the pressure of the expansion vessel at the measurement point with a pressure gauge. If the pressure is below 3.0 bar, increase it with an appropriate air pressure pump.
NOTE: Only use original spare parts from
4.3 Maintenance Checklist
Reheating
Check the circulation pump annually.
Check the timer/time programme settings annually.
Reheating: does it deliver the desired deactivation temperature? annually.
Solar cylinder
Bleed the heat exchanger if necessary annually.
Check the connections for leaks annually.
Check the temperature and pressure relief valve annually.
Checking the expansion relief valve annually.
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