Viessmann VITODENS 200 Start-Up And Service Instructions page 14

Initial Start-up and Service
Steps
(continued)
I S
nitial start-up ervice
outlet
Measuring running gas supply pressure,
using test nipple "PE"
14
6. Measure static pressure and running pressure (continued)
Running pressure
8. Measure the running pressure; value
must be:
Running supply pressure with
Natural gas
Hunder 4 "w.c. (WB2-44)
Hunder 7 "w.c. (WB2-60)
H4 to 14 "w.c. (WB2-44)
H7 to 14 "w.c. (WB2-60)
over 14 "w.c.
9. Enter gas type into Maintenance
Record on page 70 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.
PE 11. Open gas shutoff valve and check
that the test nipple "PE" and all gas
connections are gas-tight.
A
inlet
Use suitable measuring instruments
calibrated with a minimum resolution
of 0.04 "w.c. for measuring the
running pressure.
Corrective action
Propane gas
under 11 "w.c. Do not attempt adjustment. Call local
gas utility to increase pressure.
11 to 14 "w.c. Start up boiler.
over 14 "w.c. Do not attempt adjustment. Call local
gas utility to decrease pressure.
Boiler valve must not be exposed to
pressure over 14 "w.c.
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 death.