Viessmann Vitodens 200 Start-Up/Service Instructions page 11

Vitodens 200 WB2 Service
Measure Static Pressure and Running Pressure
Measuring static gas supply pressure, using test nipple "PE"
(continued)
Running pressure
8. Measure the running pressure; value must be:
Use suitable measuring instruments calibrated with
a minimum resolution of 0.04 "w.c. for measuring
the running pressure.
Running supply pressure with
Natural gas Propane gas
under 4 "w.c. under 11 "w.c. Do not attempt
4 to 14 "w.c. 11 to 14 "w.c. Start up boiler.
over 14 "w.c. over 14 "w.c.
9. Enter gas type into Maintenance Record on page 80
in this manual.
10. Switch off the heating system on/off switch on the
boiler control unit (boiler is shut down), close the
gas shutoff valve, remove the manometer and
re-tighten the screw in the test nipple "PE" A.
WARNING
Ensure that there is no open flame in the room.
WARNING
Never purge a gas line into a combustion chamber.
Never use matches, candles, flame, or other sources of
ignition for purpose of checking leakage. Use a soap and
water solution to check for leakage. A failure to follow
this warning could result in fire, explosion, personal injury
or loss of life.
Start-up and Service
Corrective action
adjustment. Call local
gas utility to increase
pressure.
Do not attempt
adjustment. Call local
gas utility to decrease
pressure.
Boiler valve must not
be exposed to pressure
over 14 "w.c.
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