Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Turn Hot Water Tap On
Remove cover from PCB
Attach U-gauge to burner pressure test point
Safely connect a link between pin 1 and 2 on terminal X4a
Turn Pot P6 fully clockwise, making a note of its original position
DHW temperature selector set to Max
Selector Switch in Hot Water Position
Attach U-gauge to burner pressure test point
Safely connect a link between pin 1 and 2 on terminal X4a
Turn Pot P6 fully clockwise, making a note of its original position
DHW temperature selector set to Max
Selector Switch in Hot Water Position
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Once the boiler has lit and established, make a note of the burner
pressure then turn potentiometer P3 fully clockwise.
Turn the min pressure adjustment screw until the burner pressure reads 1.4mb.
Turn potentiometer P3 fully anti-clockwise.
Turn the maximum pressure adjustment screw until the burner pressure reads 14.6mb.
Reset the burner pressure back to initially noted pressure by
turning potentiometer P3 back to its original setting.
Notes: When U-gauge is removed test point should be checked for gas tightness.
Return P6 to original position and remove link when test is complete.
pressure then turn potentiometer P3 fully clockwise.
Turn the min pressure adjustment screw until the burner pressure reads 1.4mb.
Turn potentiometer P3 fully anti-clockwise.
Turn the maximum pressure adjustment screw until the burner pressure reads 14.6mb.
Reset the burner pressure back to initially noted pressure by
turning potentiometer P3 back to its original setting.
Notes: When U-gauge is removed test point should be checked for gas tightness.
Return P6 to original position and remove link when test is complete.
Isolate as per TOPs P4
and refit as necessary