Gas Supply Adjustments (Commissioning Part Ii); Gas Inlet Working Pressure; Main Burner Pressure - Vaillant turboMAX pro 24/2 E Instructions For Installation And Servicing

7 Gas supply adjustments

7.1 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.
• Set the DHW temperature control to maximum and
fire the boiler at full rate by opening a hot water tap.
• Ensure that the hot water outlet temperature
adjustment control is set to maximum.
• Check that the U-gauge is reading in the range of 18 to
20 mbar. (If the pressure is not within this range this
should be investigated before continuing with the
commissioning preocedure.
(Lower pressures than this range are indicative of an
incorrectly sized or partially blocked gas supply.)
• Turn off the hot tap.
• Remove U-gauge, tighten test point sealing screw (1).
• Test for soundness.
• Record appliance working gas inlet pressure (mbar) in
the Benchmark gas boiler commissioning checklist.
2
Fig. 7.1: Gas inlet working pressure
Instructions for Installation and Servicing turboMAX pro R3

Gas supply adjustments (Commissioning Part II) 7

7.2 Main burner pressure

The burner pressure on this appliance has been factory
set and does not require adjustment. To check the main
burner pressure connect the U-Gauge as follows depen-
ding on the gas type.
• Remove front case and combustion chamber cover.
For natural gas appliances:
• Slacken the sealing screw (1) at test point on the gas
valve and attach one arm of a U-gauge (2) to the test
point.
For LPG appliances:
• Slacken the sealing screw (1a) at test point on the bur-
ner inlet gas pipe and attach one arm of a U-gauge
(2a) to the test point.
Connection for Natural gas
1
Connection for LPG
1
Fig. 7.2
Note!
All measurements and adjustments to the gas
valve must be done with the combustion cham-
ber cover removed.
1
2
1a
2a
21