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Andrew Smith
Andrew Smith, Engineer
Category: UK Plumbing
Satisfied Customers: 3591
Experience:  Domestic Gas, Commercial Gas, LPG, Unvented Hot Water, Part P Electrical, Commercial Catering
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I have just fitted a pottern Promax System boiler, this boiler

Customer Question

I have just fitted a pottern Promax System boiler, this boiler has its own pump. what are the switch connections to the pottern EP2 programmer
Submitted: 8 months ago.
Category: UK Plumbing
Expert:  Andrew Smith replied 7 months ago.
Do you have a motorised valve?
2 port or 3 port?
Customer: replied 7 months ago.
You asked if I have a two or three port valve. I have 2 two port valves. I am on wiring diagram L of the controller but its not clear which ports i should connect the ports 1 and 2 of the boiler
Expert:  Andrew Smith replied 7 months ago.
HW on and CH on will power open each of the valves, the orange switch wire from the valve should both go the the SW on the boiler, the boiler still needs a PL also
Expert:  Andrew Smith replied 7 months ago.
http://www.potterton.co.uk/downloads/Potterton_Promax_HE_Plus_Install.pdf
Page 14, half way down on the left hand side

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