Viessmann B1KA Installation And Service Instructions Manual page 47

Vitodens 100-W, B1HA/B1KA 26 to 125 Combi Installation/Service
Measure Static Pressure and Running Pressure
Start-up, Inspection and Maintenance
(continued)
8. All measurements must be made under high-fire
conditions.
Note: Use suitable measuring instruments calibrated
with a minimum resolution of 0.04 "w.c. for
measuring the running pressure.
Measure the running pressure; value must be:
Running Running
supply supply
pressure pressure with
with Liquid propane
Natural gas gas
under 4 under 10
"w.c. "w.c.
4 to 14 10 to 14
"w.c. "w.c.
over 14 over 14 "w.c.
"w.c.
9. Enter gas type into Maintenance Record on page 90
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.
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.
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.
47