PRESSURE GAS INLET (DHW DEMAND)

Set Appliance State:

Gas Off

Isolate Mains Power to appliance as per TOPs P4

Turn Hot Water Tap On

Attach U gauge to gas inlet pressure test point

Gas On

WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure

Mains Power On

Observation:

If required, reset boiler.
Allow self-check to complete and boiler to ignite and ramp up for DHW demand.
Does the Inlet pressure remain above 10 mb (N.G.) or 25 mb (L.P.G.) ?

vm vitodens 100-w b1kc 35 kw combi inner upper.jpg

vm vitodens 100-w bpa 29 kw combi gv inlet.jpg

Note.
1. When the test is complete the pressure test point should be tightened and checked for gas soundness.
2. Where the manufacturer states an inlet pressure that would normally not be acceptable please refer to TOP's for further guidance.