Measure Static Pressure And Running Pressure - Viessmann Vitodens 100-W WB1B Series Installation And Service Instructions Manual

Vitodens 100-W, WB1B Installation & Service
Steps
(continued)
Start-up and Maintenance
Start-up and Maintenance
Legend
A Inlet gas pressure measurement port
B Outlet pressure port
C Low-fire adjustment screw / cover
D Hi-fire adjustment screw
IMPORTANT
A CO measurement (see page 62) must be taken before
2
and after working on gas appliances to eliminate health risks
and to guarantee the satisfactory condition of the system.
3. Select appropriate gas type (continued)
To verify the fuel type
1. Simultaneously turn selector dial "
to their center position as shown. "SERV" appears
in the display. (To do the following step, "SERV"
must still be shown in the display).
2. Turn selector dial "tr" counter clockwise to the
"O" position within 2 seconds as shown. "A" and
the setpoint value will flash on the display.
3. Adjust the control unit to natural gas or LPG by
turning the selector dial "
or clockwise. The display shows:
"0" for operation with natural gas
or
"1" for operation with LPG.
4. Do not adjust the selector dials for 15 seconds. The
set operating mode is then saved and the control unit
returns to standard mode.

4. Measure static pressure and running pressure

Static pressure
1. To measure static and/or running pressure remove
burner cover panel as per the removal instructions
on page 67.
2. Close gas shutoff valve.
3. Loosen screw in test nipple A on the gas combination
valve, do not remove completely. Connect calibrated
manometer.
4. Open the gas shutoff valve.
5. Measure static pressure. Values must be:
- 14 "w.c. max. for NG
- 14 "w.c. max. for LPG
6. Enter measured value into Maintenance Record on
page 98 in this manual.
7. Start up boiler, using the on/off service switch (field
supplied).
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 F4 because of air in the gas
supply pipe. After fault F4 is displayed, reset the burner
(see page 76). The ignition procedure is repeated. This
boiler employs a direct spark ignition system with 3 trials
for ignition.
Start-up, Inspection and Maintenance
" and "tr"
" counter clockwise
59