Vaillant VIH S GB 210/2 S Manual page 60

8 Inspection and maintenance
Maintenance work
Solar circuit
Check the system pressure at the gauge on the solar pump station.
Visually check pipe work and connections for solar fluid leaks.
Check the solar fluid discharge pipe is secure and canister is empty.
If necessary following above checks arrange for corrective work to be carried out.
Ensure system cannot go into stagnation. Avoid middle of day (cover collectors if possible).
Depressurise the system. NOTE: Drain fluid into suitable canisters.
Carry out any repairs to correct any leaks found.
Check the pH value of the solar fluid (with litmus paper, pH > 7.5).
Check the frost protection of the solar fluid (use the Vaillant solar fluid tester).
Check the operation of the solar pump.
Check the flow rate in the solar circuit is set correctly for the system.
Collector Array
Visual inspection of the collector, collector fastenings and connections.
Visual inspection only from suitable safe location.
Check the pipe insulation for damage and arrange repair if necessary.
Solar controller
Check and record solar gains. Reset as necessary.
Check the sensors are secure and temperatures correctly displayed (KOL1, SP1 and SP2).
Check settings are correct (see controller manual for details).
Check the time programme and temperature settings for auxiliary reheat are correct.
Cylinder
Check all connections to ensure that there are no leaks.
Check the temperature and pressure relief valve.
Check the expansion relief valve.
Check the charge pressure of the hot water expansion vessel.
Check water flow rates are correct (check and clean filters as necessary).
Ensure set temperatures are correct
Check the charge pressure of the expansion vessel, re-pressurise as necessary.
Check the function of the hot water thermostat mixer.
Fill in the service section of the Benchmark cylinder commissioning checklist.
Tab. 8.1 Maintenance checklist
60
Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
Maintenance interval
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