Viessmann VITODENS 200-W WB2B Series Start-Up/Service Instructions page 15

Steps
(continued)
I S
nitial start-up ervice
inlet
A
A
Fig. 8 Measuring gas supply pressure
at inlet gas pressure port
10.Measure static pressure and running pressure
1. To measure static and/or running
pressure remove boiler enclosure
panel as indicated page 9 in these
instructions.
2. Close gas shutoff valve (field
supplied).
3. Loosen screw at inlet gas pressure
port A on the gas combination
valve, do not remove completely.
Connect manometer.
4. Open the gas shutoff valve.
outlet
5. Measure static pressure. Values
must be:
H 14 "w.c. max. for NG
H 14 "w.c. max. for LPG
6. Enter measured value into
Maintenance Record on page 73 in
this manual.
7. Start up boiler, using the ON/OFF
switch "8" on the boiler control.
8. Measure the running pressure; value
must be:
Running supply pressure with
Natural gas
under 4 "w.c.
4 to 14 "w.c.
over 14 "w.c.
9. Enter gas type into Maintenance
Record on page 73 in this manual.
10. Switch off the ON/OFF switch "8"
on the boiler control, close the gas
shut-off valve, remove the
manometer and re-tighten the
screw at inlet gas pressure port A.
WARNING
Ensure that there is no open flame in
the room.
IMPORTANT
A CO measurement (see page 24) must
be taken before and after working on
gas appliances to eliminate risks to
health and to guarantee the
satisfactory condition of the system.
IMPORTANT
The burner is automatically ignited and
starts operation after a safety time has
elapsed.
During initial start-up, the unit may
indicate a fault because of air in the gas
supply pipe (especially for liquid propane
gas).
After approx. 5 seconds, press the "E
button to reset the burner. The ignition
procedure is repeated. This boiler
employs a direct spark ignition system.
Use suitable measuring instruments
calibrated with a minimum resolution
of 0.04 "w.c. for measuring the
running pressure.
Corrective action
Liquid propane gas
under 10 "w.c. Do not attempt adjustment. Call local gas utility
to increase pressure.
10 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.
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.
Initial Start-up and Service
WARNING
E " E E
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