Help! Installing Heating Controls

[aijock]

I'll apologise in advance if this makes no sense to anyone...

I had a heating engineer in to change a Danfoss FP715 programmer to the Honeywell Sundial RF2 Pack 1. It was supposed to be easy where the new unit would fit onto the old back plate but it didnt, so he disconnected everything and re-wired it up. I think he wired it up incorrectly since he blew the programmer when attaching it to the back plate with the power on

So, I found another engineer and he is having similar problems trying to understand how it needs to be wired up. I bought the programmer myself this time so I'm afraid if he has wired it wrong aswel, I'm too afraid to turn it on.

My system consists of a Camray 5 Boiler and Grundfoss pump and it is central heating only.

The Boiler needs a permanent live and has a switching wire which should be connected to the programmer to fire up the boiler when triggered by the timer.

The pump only has power and doesnt have a switching wire.

What seems to be difficult to understand is whether the programmer powers the boiler and pump.

In the meantime, I have connected all the cables directly to the mains and everything fires up, the boiler and pump working simultaneously. I have the main switch so I can turn it on and off when required but I hope someone might be able to help me understand how it can be connected up to the programmer.

Thanks

 

[Terrywookfit]

The boiler does not need a P/L. ( Unless integral prog is fitted)
S/L controls boiler and pump.
It could not be simpler!!

 

[aijock]

Hey, thanks for your reply


This boiler does have a P/L as it has a frost protection themostat internally.

It must be the programmer then since its not powering anything.

I rewired it with the programmer and P/L on the boiler connected to the mains.

The pump live and boiler switching wire is connected to the programmer switch.

When switched on from the programmer the pump doesn't have power and the boiler doesn't fire up

http://www.honeywelluk.com/document...Sundial RF² Pack 1 - Installer Guide 1201.pdf

This is the backplate, the black switching wire to power the pump and fire the boiler:
View media item 68142

 

[Agile]

That looks typical of many programmer's wiring.

But I am always interested in the financial aspects in these cases.

Who supplied the unit which was damaged? Who ended up bearing the financial loss?

How did he explain his mistake? What did he offer to do then?

They are pretty simple to wire but some models have a different order of wires on the left.

Some people think they know it all and don't even bother to look at the guide on the back of the programmer!

Tony

 

[aijock]

The first unit was supplied by the engineer and I wasn't charged anything at all for his attempt, not even his time. He explained that it was supposed to be a simple swap of programmers since it was the industry standard back plate. Since he couldn't make it work he said I needed to find someone else to do it.

The second engineer hasnt charged me anything either since I supplied the unit and he hasn't managed to make it work...

 

[aijock]

issue solved, its not a simple transfer of programmer from danfoss to honeywell since honeywell programmers aren't capable of powering anything. i returned the honeywell unit and got the danfoss fp715si and connected it up and hey presto, everything running now.

thanks all for your help

 

[Terrywookfit]

It needed a link from L to T1 as the instructions stated.

Four King Jesus Three of you and not one read the instructions!!

 

[aijock]

It needed a link from L to T1 as the instructions stated.

Four King Jesus Three of you and not one read the instructions!!

Thats what I was told caused the blow out on the first unit..?

View media item 68203

 

[Terrywookfit]

It needed a link from L to T1 as the instructions stated.

Four King Jesus Three of you and not one read the instructions!!

Thats what I was told caused the blow out on the first unit..?

View media item 68203

Why has the wiring been replaced?.
Why were you using T2 (Heating off terminal)
If the blue wire connected to T2 was a neutral. I can well understand it.

 

[aijock]

your guess is as good as mine. Thats the way he wired it up the first time. The wiring was replaced because the straight swap of the unit didnt work (no L to L1 was wired)

Anyway, good to go now though.

Thanks alot for your replies. Apreciate it. Cheers