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by trev420
Tue Nov 13, 2007 1:09 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: boiler pressure
Replies: 14
Views: 7178

[quote="htg engineer"]Drain central heating system, if you remove the front cover of boiler you will see a big red drum ? this is the expansion vessel. There's a car tyre type valve on the bottom left hand side, As you will see there's a bypass pipe too close to even get the dust cap off. ...
by trev420
Tue Nov 13, 2007 8:56 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: boiler pressure
Replies: 14
Views: 7178

have i got to take off the bypass pipe .I can see the valve above the bypass pipe and have i still got to take off the pipe off the bottom of the pump
by trev420
Mon Nov 12, 2007 8:54 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: boiler pressure
Replies: 14
Views: 7178

[quote="trev420"][quote="htg engineer"]it is a unvented system. It could have been the water to water heat-ex, but if there was no signs of leaks on the diverter then there's no way it could have been that. It seems to be the expansion vessel, you could try re-pressurising but it...
by trev420
Sun Nov 11, 2007 6:21 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: boiler pressure
Replies: 14
Views: 7178

yes i have seen the valve you said about and its facing me a can get at it
with out the pipe there do i still have to take the pipe off
by trev420
Sat Nov 10, 2007 10:42 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: boiler pressure
Replies: 14
Views: 7178

[quote="htg engineer"]it is a unvented system. It could have been the water to water heat-ex, but if there was no signs of leaks on the diverter then there's no way it could have been that. It seems to be the expansion vessel, you could try re-pressurising but it's quite awkward on the 24 ...
by trev420
Sat Nov 10, 2007 9:16 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: boiler pressure
Replies: 14
Views: 7178

could you please tell me how i go about repressurizing the expansion vessel and what i have to do exactly
by trev420
Sat Nov 10, 2007 8:44 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: boiler pressure
Replies: 14
Views: 7178

could you tell me how to repessurize the expansion vessel and what do i do
by trev420
Fri Nov 09, 2007 8:07 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: boiler pressure
Replies: 14
Views: 7178

the heat exchanger i changed was the water to water
by trev420
Fri Nov 09, 2007 7:59 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: boiler pressure
Replies: 14
Views: 7178

yes it is a vented system .the pressure drops when the heating has been on and it drops quite quickly .i keep having to refill the boiler every time .I changed the diverter because i thought it was that was causing the drop in pressure
by trev420
Wed Nov 07, 2007 9:18 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: boiler pressure
Replies: 14
Views: 7178

boiler pressure

iv,e got a worcester 24cdi the pressure keeps dropping replaced the heatexchanger and the diverter valve and the pressure valve can any one help me with this problem
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