Measure Static Pressure And Running Pressure - Viessmann VITODENS 200-W WB2B Start-Up/Service Instructions

Initial Start-up and Service
Steps
(continued)
I S
nitial start-up ervice
inlet
A
Fig. 7
Measuring gas supply pressure at inlet
gas pressure port
18

9. Measure static pressure and running pressure

1. To measure static and/or running
pressure remove boiler enclosure
panel as indicated page 11 in these
instructions.
2. Close gas shutoff valve (field
supplied).
3. Loosen screw A at inlet gas
pressure port on one of the two gas
combination valves, do not remove
completely. Connect manometer.
4. Open the gas shutoff valve.
outlet
5. Measure static pressure. Value must
be 14 "w.c. max.
6. Enter measured value into
Maintenance Record on page 74 in
these instructions.
A
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
under 4 "w.c.
4 to 14 "w.c.
over 14 "w.c.
9. Enter gas type into Maintenance
Record on page 74 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 A at inlet gas pressure
port.
IMPORTANT
A CO measurement (see page 26) 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.
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
Do not attempt adjustment. Call local gas utility to increase pressure.
Start up boiler.
Do not attempt adjustment. Call local gas utility to decrease pressure.
Boiler valve must not be exposed to pressure over 14 "w.c.
Ensure that there is no open flame in
the room.
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.
WARNING
WARNING
E "
E E