Worcester Ri Isolation for boiler

[Mikead80]

Attended a Worcester Ri which has been 'At Risked' by the service contractor due to boiler wiring. Boiler has been in operation for over 5 years.
Cylinder and all controls and fused spur located inside the property, boiler located in garage. The boiler only has SL N E supplying it, installer has connected the SL to the boiler L and bridged to boiler SL meaning the boiler is powered down until a demand is made and when the demand is satisfied comes to a very quick shut off too, no fan over run to clear flue, no pump over run to dissipate heat so will require wiring correctly to get a permanent live and pump live as per manufactures instructions.

There is a double socket available in the garage, the option of running a 5 core from boiler back to control centre is not possible. I'm going to supply the boiler with L N E from the garage double socket, either with a 3A plug or fused spur.
The existing cable feeding the boiler I will keep the SL as SL and use the N for the Pump Live.

So I will now have 2 cables going into the boiler - L N E (from garage) & SL PL (from and to the control centre). I have ordered electrical warning labels to inform service engineers there are 2 separate electric supplies/isolators to the boiler, one in the garage and one from the control centre in the house.

Recommendations Please!!

I would like one isolator at the boiler to cut off both cable feeds, the usual 3 pole fan switches will not work as I need to isolate L N SL PL.
The only isolator I can see that may do the job is the 16A BG 4 Pole Rotary Isolator Screwfix part number 874XF which appears excessive but can't find anything else.

Appropriate warning labels will clearly giving locations of both electrical isolation points will hopefully keep future engineers safe but I feel the service contractor they have here will likely flag up 'no isolation point' directly at the boiler when they return, interestingly they offered no solutions to this issue, just 'at risked' it and left.

Any suggestions please?

Thanks!!

 

[RBG]

I went on a Worcester training course where they mentioned this sort of situation . You can get a wireless type unit in situations where 5 core isn’t possible. (I will see if I can dig out name) but it’s not as good value as cable. Can happen when replacing older boilers and you need to upgrade to 5 core but can’t due do cable run That is one option? Speak to Worcester. Are they happy with 2 power sources?

 

[RBG]

MAINSLINK by RF Solutions is the product

May or may not be an option depending on what you have to do / are happy with as the end result.

 

[Mikead80]

MAINSLINK by RF Solutions is the product

May or may not be an option depending on what you have to do / are happy with as the end result

Appreciate this, definitely another option to consider, will still have to have 2 separate supplies, but will allow one isolation point at the boiler rather than a fused spur to big isolator. Will check in with Worcester too, thanks for the advice

 

[RBG]

Appreciate this, definitely another option to consider, will still have to have 2 separate supplies, but will allow one isolation point at the boiler rather than a fused spur to big isolator. Will check in with Worcester too, thanks for the advice

no problem..if you wanted to look at the products wiring instructions / brochure thing I can ping over to you

 

[ShaunCorbs]

At risked of what

Boiler wiring is fine not the best / optimal wiring but nothing unsafe about it

 

[Mikead80]

At risked of what

Boiler wiring is fine not the best / optimal wiring but nothing unsafe about it

It is a harsh one isn't it!!

Something to do with incomplete combustion due to boiler shutting down without fan clearing combustion products and unignited gas.
No pump over run causing heat exchanger stress
No isolation at boiler

WB Service Engineer issued it with client informed 10 year warranty voided until electric supply works rectified so the wiring isn't fine in Worcesters opinion.

Just need to find a solution for the client, looking at the RF solution as mentioned above or the 4 pole isolator but need to check Worcester are ok with 2 separate feeds which I hope will be ok as long as all can be isolated at boiler and appropriate labels are placed to inform the system is fed with 2 separate fused supplies.

If I just say its not at risk and the wiring is fine there nothing unsafe I doubt Worcester will be carrying out any repair under warranty so something will now need to be done....