Sealed Water System - Viessmann VITODENS 200 WB2A Installation & Servicing Instructions Manual

6 Routine Servicing
6.8 Re-commissioning
a)
Replace the sealed chamber front panel as reverse of removal.
b)
Switch on the electricity and gas supply and light the boiler.
c)
Check the operation of the appliance in both central heating and DHW modes.
d)
Check the combustion performance at maximum rate as in section 5.6.

6.9 Sealed Water System

a)
Check the operation of the pressure relief valve as described in section 5.1.
b)
Check the correct operation of the appliance pressure gauge by noting the
reading when cold and check that the pressure increases with temperature.
Replace the gauge if readings are not reliable.
c)
Check that the system is at its original (cold) design pressure. If necessary,
re-pressurise the system as described in section 5.1 and search for and rectify
any leaks causing loss of water.
6.10 Final Checks
a)
Refit the outer casing as reverse of removal and return all appliance and
external controls (if fitted) to their original settings.
b)
Check that the minimum boiler clearances are maintained.
c)
Check that the flue terminal it is good condition and clear of any obstructions.
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