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by mulhaird
Mon Mar 03, 2008 1:47 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Potterton Proforma 28I crcuit diagrams
Replies: 5
Views: 6732

The gas man came back. Apparently when the PCB was replaced he failed to fit the pre-heating jumpers. These have been re-ordered and he will return and fit them tomorrow.
by mulhaird
Sun Mar 02, 2008 11:29 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Potterton Proforma 28I crcuit diagrams
Replies: 5
Views: 6732

Thanks for this.. Thay are coming back Monday afternoon. I will let you know what happens.

Dennis
by mulhaird
Sat Mar 01, 2008 6:17 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Potterton Proforma 28I crcuit diagrams
Replies: 5
Views: 6732

I have the schematic diagrams but not the electronic circuit diagram of the PCB. Ever since the gas board replaced the original one which they blew up the system does not modulate the hot water. The water is fine when the heating is on but when off its takes ages to warm up from stone cold. Before t...
by mulhaird
Thu Feb 28, 2008 11:53 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Potterton Proforma 28I crcuit diagrams
Replies: 5
Views: 6732

Potterton Proforma 28I crcuit diagrams

Does anybody know where I can get a circuit diagram of the PCB in the above boiler. The PCB was replaced a few months ago. Everything is working but the hot water temp coming out of the tap does not equate to the temp the boiler shows. The water is about 40degrees yet the boiler says its 70. Variati...
by mulhaird
Tue Feb 12, 2008 8:52 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Not as hot as it used to be
Replies: 2
Views: 2779

Thanks for the reply. This has only occured since the PCB was changed. I would of thought that there was some element of calibration that has to be done to make sure that the temperature the boiler is saying matches the temp of the water?

Dennis
by mulhaird
Mon Feb 11, 2008 10:56 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Not as hot as it used to be
Replies: 2
Views: 2779

Not as hot as it used to be

Hi, Having a small issue with my Potterton Performa 28I combi boiler. The problem was when the heating was on and you turned on the hot water the boiler switched over to hot water then when the tap was switched off it did not revert beck to heating. After 6 visits from the Gas Board they finally fou...
by mulhaird
Thu Nov 01, 2007 11:49 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Boiler pressure dropping
Replies: 1
Views: 2978

Boiler pressure dropping

I have a 2 year old Potterton Conbination boiler. Over the last couple of months I have noticed that the boiler pressure keeps dropping. On averafe it will drop 0.5 bar over a 24 hour period. I have had the floor boards up and checked the pipes and was ubable to find a leak. Any ideas on how I would...
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