Checking Static And Supply Pressure - Viessmann Vitodens 200 Service Instructions Manual

Further details regarding the individual steps

Checking 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. Undo the screw inside test connec-
tor "IN"A on the gas combination
valve, but do not remove, and con-
nect the pressure gauge.
3. Open the gas shut-off valve.
4. Measure the static pressure and
record it in the service report.
Set value: max. 57.5 mbar.
Commissioning, inspection, maintenance
(cont.)
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" to reset the
burner.
6. Check the supply (flow) pressure.
Set values:
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.
7. Record the actual value in the ser-
vice report.
Take the action shown in the follow-
ing table.
8. Shut down the boiler, close the gas
shut-off valve, remove the pressure
gauge and close test port A with
the screw.
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