Set Appliance State:
Gas Off
| Isolate Mains Power to appliance as per TOPs P4 |
CH Demand
Disconnect fan connector illustrated and place in a safe position
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
WARNING - STAND CLEAR OF THE BOILER DURING TEST
Apply a demand and observe the fan impellor. Approx. 10 seconds after boiler registers demand the impellor should try to rotate (move backwards and forwards for approx. 1-2 seconds), this movement will happen once only.
Notes:
It may take several attempts at this test to confirm this movement does or does not take place, (reset appliance after approx. 20 seconds to restart test).
Appliance may enter/be in lockout during test, reset appliance as required to complete the test.
Before reassembly check the integrity of all disturbed gaskets and seals and replace as necessary also all disturbed joints should be checked for gas tightness.
Apply a demand and observe the fan impellor. Approx. 10 seconds after boiler registers demand the impellor should try to rotate (move backwards and forwards for approx. 1-2 seconds), this movement will happen once only.
Notes:
It may take several attempts at this test to confirm this movement does or does not take place, (reset appliance after approx. 20 seconds to restart test).
Appliance may enter/be in lockout during test, reset appliance as required to complete the test.
Before reassembly check the integrity of all disturbed gaskets and seals and replace as necessary also all disturbed joints should be checked for gas tightness.
Isolate as per TOPs P4
and refit as necessary