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Mend Worcester 28CDI Home Heating System

The pressure is 0, how do i fill the water back up with the key?

(Worcester 28cdi model)

Nick Vassallo
October 2007
ring worcester bosch they will talk you through it

bob crawley
December 2009
remove the bottom trim by pulling down on the front egde, there are two clips holding it on.

look underneith the apliance on the middle left hand side there is a black manifold with a big hole in it. stick the key in this hole and twist the key until it locks in place (should feel it click upwards)

to the right of the space where the key is there is a white hexagonal tap, turn it clockwise 2-3 turns and check the gauge, it hsould be slowly going up and you should be able to hear the water going in.

when the gauge reaches just above 1bar maybe 1.1 turn the tap clockwise to switch off.

make sure its fully off and spin the key and remove - when you do this you'll get a couple of drips of water, this is normal.

If you set it too high on the gauge depending on the age of the appliance you may cause the overflow to begin running, if you do this call a service engineer. just be careful.

hope this helps.

Steve Gasman
October 2007
remove the bottom trim by pulling down on the front egde, there are two clips holding it on.

look underneith the apliance on the middle left hand side there is a black manifold with a big hole in it. stick the key in this hole and twist the key until it locks in place (should feel it click upwards)

to the right of the space where the key is there is a white hexagonal tap, turn it clockwise 2-3 turns and check the gauge, it hsould be slowly going up and you should be able to hear the water going in.

when the gauge reaches just above 1bar maybe 1.1 turn the tap clockwise to switch off.

make sure its fully off and spin the key and remove - when you do this you'll get a couple of drips of water, this is normal.

If you set it too high on the gauge depending on the age of the appliance you may cause the overflow to begin running, if you do this call a service engineer. just be careful.

hope this helps.

Steve Gasman
October 2007

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