Hi. I’ve recently had installed a manifold (including zone valve and pump) for the newly installed Wet UFH in my extension.
The system is split into three zones 1) Hot Water 2) Extension UFH 3) The rest of the house which is the original central heating system.
All work fine when switched on individually and the original hot water and original central heating works fine when switch on together. However, if the newly installed UFH system is switched on with either the original hot water or the original central heating, the consumer unit RCD trips.
The supply to the UFH valve and pump is spurred from a different ring main that the spur supplying the original hotwater zone valve and original central heating zone valve and I thought that might be an issue. However, I temporarily provided a supply to the UFH valve and pump from the same ring main as the hot water and central heating which made no difference as the RCD continued trip when the UFH was switched on with either the hot water or the central heating.
Any suggestions as to what the issue may be ?
The system is split into three zones 1) Hot Water 2) Extension UFH 3) The rest of the house which is the original central heating system.
All work fine when switched on individually and the original hot water and original central heating works fine when switch on together. However, if the newly installed UFH system is switched on with either the original hot water or the original central heating, the consumer unit RCD trips.
The supply to the UFH valve and pump is spurred from a different ring main that the spur supplying the original hotwater zone valve and original central heating zone valve and I thought that might be an issue. However, I temporarily provided a supply to the UFH valve and pump from the same ring main as the hot water and central heating which made no difference as the RCD continued trip when the UFH was switched on with either the hot water or the central heating.
Any suggestions as to what the issue may be ?