Checking Static And Supply Pressure - Viessmann Vitogas 100 Service Instructions Manual

Further details regarding the individual steps

Checking static and supply pressure

¨ Safety instructions
Measure the CO value before and after any work on gas appliances, to
prevent any health hazards and to ensure the perfect operational condition of
the system.
LPG version
Flush the LPG tank twice after installation or replacement.
Thoroughly vent the tank and gas lines after flushing.
A
Initial start-up, inspection and maintenance
Static pressure
1. Close the gas shut-off valve.
2. Unscrew the screw inside test
nipple A on the gas combination
valve and connect pressure gauge.
3. Open the gas shut-off valve.
4. Check static pressure; it should be
H max. 25 mbar for natural gas,
H max. 57.5 mbar for LPG.
Record the actual value in the
service report.
Supply pressure (flow pressure)
5. Start up the boiler.
Please note:
On start-up, the boiler can enter a
fault state because of airlocks in
the gas pipe.
After approx. 10 seconds, press the
reset button on the burner control
unit, this repeats the ignition
process.
(cont.)
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