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6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Commissioning
Checking the Static Pressure and Supply Pressure
Supply pressure (flow pressure)
Measures
Do not start the boiler. Notify the gas supply utility or LPG supplier.
For natural gas
For LPG
< 4” w.c.
< 10” w.c.
4 - 14” w.c.
10 - 14” w.c.
Start the boiler.
> 14” w.c.
> 14” w.c.
Install a separate gas pressure governor upstream of the system.
Set the pre-charge pressure to 4” w.c. for natural gas and 10” w.c. for LPG.
The gas solenoid valve must not be exposed to pressures above 14 ”w.c.
Legend
A
Inlet gas pressure measurement port
Measuring running gas supply pressure, using test nipple
A
Static pressure
1. To measure static and/or running pressure remove
burner cover panel as per the removal instructions
on page 45.
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 99 in this manual.
7. Start up boiler, using the on/off service switch (field
supplied).
A CO
2
measurement (see page 59) must be taken before
and after working on gas appliances to eliminate health risks
and to guarantee the satisfactory condition of the system.
IMPORTANT
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.
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.
9
.
Enter gas type into Maintenance Record on page 99
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.
Running
supply
pressure
with
Natural gas
Running
supply
pressure with
Liquid propane
gas
Corrective action
under 4
“w.c.
under 10
“w.c.
Do not attempt
adjustment. Call local
gas utility to increase
pressure.
4 to 14
“w.c.
10 to 14
“w.c.
Start up boiler.
over 14
“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.
Measure the running pressure; value must be:
