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 11 "w.c. Do not attempt
under 4 "w.c.
(WB2-44)
under 7 "w.c.
(WB2-60)
11 to 14 "w.c. Start up boiler.
4 to 14 "w.c.
(WB2-44)
7 to 14 "w.c.
(WB2-60)
over 14 "w.c. over 14 "w.c.
9. Enter gas type into Maintenance Record on page 73
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.
11. Open gas shutoff valve and check that the test
nipple "PE" and all gas connections are gas-tight.
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.
11