central heating nightmare

[aaron1591]

Hi I wonder if someone can help me I'm having trouble getting my heating and hot water to come on at the same time I've recently replaced the pump and the 3 port valve

The old 3 port valve was a Honeywell mid position v4073a
And the new one is siemens 3pmp-v22 but i cant seem to get it to mid position my setup is as follows

Programmer- potterton ep2000
Cyclinder stat-switchmaster
Boiler potterton netaheat
Pump- grundfos
M/v- siemens 3pmp-v22

The wiring goes like this

Boiler
Brown-d
Blue-n
Earth-e

Motorised valve
Neutral - neutral
Earth-earth
White-c
Grey-1
Orange-a

Main power
Brown-live
Blue-neutral block
Earth- earth

Cyclinder stat
Blue-1
Earth-a
Live-3

Pump
Neutral-n
Earth-earth
Live-d

I'm also wanting to ad a room stat which has
No
Com
Nc

Where do I wire these to?

And finally the 3port valve instructions say to get mid position wire as followed

Blue-2
White-5(without room stat)
Grey-7
Orange-8
Earth-3

With room stat wire
White-6

 

[mechelec]

Look on Honeywell website for wiring diagrams. Much easier to understand than a rambling explanation on here.

 

[snowhead]

http://www.google.co.uk/url?sa=t&rc...=tdOjqSKhhdckv1rwd6eFng&bvm=bv.57127890,d.ZGU

 

[mechelec]

^^^^^^^^. That is what I said !!!!

 

[robsparky1975]

Y plan,get the wiring diagram for a mid position valve and see whats missing.:smiley2: