Set Appliance State:
Mains Power Off
Gas Off
Turn Hot Water Tap On
Pre-heat switch OFF
Attach U-gauge to burner pressure test point
Attach U-gauge to burner pressure test point
Gas On
Mains Power On
Measurement:
Allow fan to run and burner to ignite.
Does U-gauge show a burner pressure of approximately 14.5 mbar?
Note: Maximum burner pressure in DHW mode should be 14.5 mbar.
Note: When U-gauge is removed pressure nipple should be tightened & checked for gas soundness.
Does U-gauge show a burner pressure of approximately 14.5 mbar?
Note: Maximum burner pressure in DHW mode should be 14.5 mbar.
Note: When U-gauge is removed pressure nipple should be tightened & checked for gas soundness.
Isolate as per TOPs P4
and refit as necessary