Wiring help to install a Baxi Megaflow 28kw System boiler

[darkart]

Hi all,
Was wondering if some one could help me with the wiring installation of the above boil?

I have replaced my old KESTON 25 Celsius (worst boiler on this planet), with a Baxi Megafloe 28 HE system boiler. The problem I have is the old boiler was designed around a comercial system, to compliacted for a house, seems like some was showing off with the design method.
The system has 3 x 2 port valves for the heating side and 1 x 2 port valve for the hot water side feeding a cistern. Before the 2 port valve feedng the hot water cistern is a pump fitted additionaly to the boiler pump. The room stat is fitted in the kitchen about 5 meters away from the boiler.

On the old Kestin boiler it had 5 wires feeding to the boiler from a 5 core cable but on the new boiler there is only the main power supply cable with a link.

The wiring from the pumps, valves stats are like a pan of spegeti and was wondering if some wise owl can help me and explain how the connections should be fitted to the boiler.
I have looked in the manufactures instructions but the wiring diagram is very basic.
Thanks

 

[dcawkwell]

Any of the 2 port valves (orange wire) need to be connected to the boiler switched live. So if any zone is calling for heat it fires the boiler.

 

[Agile]

Its normal to have a gas boiler fitted by a gas registered engineer. They would know how to connect the boiler.

Required under the Building Regulations anyway!

Tony