Potterton Puma

[stevefawell]

Guys

I have an old Puma 100e which has performed well over the years without any of the usual problems.
It has now developed a problem on the hot water side were there is noise and bumping from the boiler.
I have checked the pump, and topped up both expansion vessels. The burner appears to modulate correctly.
Anybody got a circuit diagram for the control boards?

Any ideas?

cheers steve

 

[kevplumb]

might help if you had an e mail in your profile

 

[ChrisR]

partsarena.com/baxi or \baxi

 

[gaspro1981]

there should be a wiring diagram on the underside of the front cover

 

[Agile]

You will only get an interconnection diagram.

You might as well just check to see why the DHW flow switch does not turn off immediately when a demand ceases.

Tony

 

[baxpoti]

DHW flow switch problem

 

[bengasman]

Puma's are known for dodgy diverters as well

 

[stevefawell]

Guys

I checked the DHW flow switch and it appears to work ok switching off at the end of demand. The central heating runs fine with no noise. I also checked the temp sensors and swopped them over but no change. I still get the noise when hot water runs after about 20 sec and then intermittantly during demand.

Cheers

Steve

 

[mickyg]

could be scaled hex, whats water like round your way?

 

[stevefawell]

MickyG

Waters pretty soft round here we don't get limescaling

steveF

 

[baxpoti]

Fan noise?