Viessmann Vitodens 100-W WB1B Series Installation And Service Instructions Manual page 60

Start-up, Inspection and Maintenance
Steps
(continued)
Start-up and Maintenance
Measuring running gas
supply pressure,
using test nipple A
60
4. Measure static pressure and running pressure (continued)
8. All measurements must be made under high-fire
conditions.
Note: Use suitable measuring instruments calibrated
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 98
in this manual.
10. Switch off the heating system ON/OFF service switch
(boiler is shut down), close the gas shut-off valve,
remove the manometer and re-tighten the screw in
the test nipple A.
11. Open gas shutoff valve and check that the test nipple
A and all gas connections are gas-tight.
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.
Vitodens 100-W, WB1B Installation & Service
with a minimum resolution of 0.04 "w.c. for
measuring the running pressure.
Running Corrective action
supply
pressure with
Liquid propane
gas
under 10 Do not attempt
"w.c. adjustment. Call local
gas utility to increase
pressure.
10 to 14 Start up boiler.
"w.c.
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
WARNING