glowworm swiftflow 75 fan proving

[kingccc]

hi i am trying to understand my boiler and the manual isnt very helpfull, boiler is a glowworm swiftflow 75 and doesnt seem to have a aps what does it use for fan proving???

cheers guys

 

[kingccc]

 

[kevindgas]

it uses the Air Pressure Switch that is hidden from your eyes!!!

 

[supergas]

 

[compheat]

Honeywell APS just follow the tubes coming of the fan

 

[kingccc]

so where is it then cos i recently had fan changed and boiler serviced and there were no pipes coming from fan, flue or anywhere as far as i could see and just wondered if it uses a different method of proving
or do you not know either??

 

[kingccc]

there deffinately are no tubes coming from fan as he left old 1 here and i have inspected it also

 

[compheat]

The manual i looked at was for a Swiftflow 75e, but ive got to admit that i always thought that they didnt have one (cant remember seeing one)
I've just checked up on the Hot Water express 80 which was the model before and no APS fitted.L & N to fan straight from board.

 

[cross thread]

no a/p switch .relies on the fan .if it fails it baffels out and knocks the pilot out due to lack of air

 

[kingccc]

aaah thanks alot
that answers it then cos before fan was fitted boiler used to light, go to full flame for about 30 seconds tops then extinguish

thankyou for all your replies