Gas Inlet Working Pressure - Vaillant TURBOmax Plus SERIES Instructions For Installation And Servicing

GAS SUPPLY ADJUSTMENTS
(COMMISSIONING PART II)
picture shows a
TURBOmax Plus boiler
Fig. G.1: Gas inlet working pressure
44
2
1
Gas inlet working
pressure
To check the gas inlet working
pressure:
Lower the front panel of the boiler.
Lower the control panel.
Slacken the sealing screw (1)
located at measuring point „P.IN".
Attach U-gauge to the inlet test
point on the gas valve (2).
Ensure that the gas service valve is
open.
Turn off the boiler at the main
ON/OFF control.
Press and hold the „+" button,
while pressing the button turn the
main ON/OFF control to the „1"
ON position.
Continue holding „+" button until
display alternates between „P1"
and „P2". Release „+" button.
Press „+" button until „P1" (full gas
rate) is shown in display.
Press „i" button to operate boiler at
full gas rate.
Check that the U-gauge is reading
in the range between 18 and
20 mbar. If the pressure is not
within this range this should be
investigated before continuing with
the commissioning procedure.
Lower pressures than this range are
indicative of an incorrectly sized or
partially blocked gas supply.
Switch off the boiler at the main
ON/OFF control.
Remove U-gauge, tighten test point
sealing screw (1).
Test for soundness.
Record appliance working gas inlet
pressure (mbar) in the Benchmark
Installation, Commissioning and
Service Log Book.