L
lukesparky123
Iv done a few heating systems now but no where near an expert yet but im a bit stuck because all the s plan systems iv done in the past have an external pump but this system is a vaillant boiler with an internal pump. So just need to know how to alter the wiring from external pump to internal.
any help would be great.
thanks alot luke
any help would be great.
thanks alot luke