Checking The Static And Supply Pressure - Viessmann Vitodens 333-F Service Instructions Manual

Further details regarding the individual steps
For further details regarding faults,
see page 75.

Checking the static and supply pressure

Danger
CO build-up as a result of an incorrect burner setup can have serious
health implications.
Carry out a CO test prior to and after work on gas equipment.
Operation with LPG
Flush the LPG tank twice during commissioning/replacement. Thoroughly vent
the tank and gas supply lines after flushing.
1. Close the gas shut-off valve.
2. Release screw A inside test con-
nector "PE" on the gas train, but do
not remove it; then connect the
pressure gauge.
3. Open the gas shut-off valve.
Commissioning, inspection, maintenance
(cont.)
4. Measure the static pressure and
record it in the service report on
page 129.
Set value: max. 57.5 mbar
5. Start the boiler.
Note
During commissioning, the boiler
can enter a fault state because of
airlocks in the gas pipe. After
approx. 5 s press "E RESET" to
reset the burner.
6. Check the supply (flow) pressure.
Set value:
& Natural gas: 20 mbar
& LPG: 50 mbar
Note
Use suitable test equipment with a
resolution of at least 0.1 mbar to
measure the supply pressure.
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