Checking The Nozzle Pressure - Viessmann Vitopend 100-W Installation And Service Instructions Manual

Further details regarding the individual steps
Supply pressure (flow pressure)
For natural gas H
Below 17 mbar
17 to 25 mbar
Above 25 mbar

Checking the nozzle pressure

A Test nipple
B Cap
C Bolt
D Phillips screw
For LPG P
Below 25 mbar
25 to 45 mbar
Above 45 mbar
Commissioning, inspection, maintenance
(cont.)
Action
Do not start the boiler. Notify your gas
supply utility or LPG supplier.
Start the boiler.
Install a separate gas pressure governor
upstream of the system and regulate the
pre-charge pressure to 20 mbar for natu-
ral gas or 37 mbar for LPG. Notify your
gas supply utility or LPG supplier.
01. Switch OFF the control unit ON/OFF
switch (the boiler shuts down).
3
2
1
Turn the rotary selector "tr" anti-
clockwise as far as it will go.
02. Close the gas shut-off valve.
03. Release the screw inside test nipple
A, but do not remove, then connect
the pressure gauge.
04. Open the gas shut-off valve. Switch
ON the system ON/OFF switch on
the control unit.
4
5
6
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