Set Appliance State:
Gas Off
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Turn Hot Water Tap On
Note the pressure reading on the air pressure switch
Connect the air pressure switch charge kit to +ve connection on the air pressure switch
Connect the air pressure switch charge kit to +ve connection on the air pressure switch
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow fan to run.
Increase the pressure via the syringe to that indicated on the pressure switch.
Does sparking now occur?
Note:
If sparking does not occur when the specified pressure
is applied it is permissible to increase the pressure by 50%
100 Pascals = 1mbar / 50 Pascals = 0.5mbar
Increase the pressure via the syringe to that indicated on the pressure switch.
Does sparking now occur?
Note:
If sparking does not occur when the specified pressure
is applied it is permissible to increase the pressure by 50%
100 Pascals = 1mbar / 50 Pascals = 0.5mbar
