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    HW call won’t light boiler

    I have a Vaillant ECO Plus, remote hot water cylinder, wired Honeywell S Plan with a Lifestyle LP722. This time of year I have CH set to OFF and HW set to twice per day. For the past day or two, the HW signal calling for heat doesn’t light the boiler. E.g., the boiler water was 19 C this...
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    I can't isolate (turn off) hot water to the house

    I'm trying to change a leaky isolating valve in the 1st floor bathroom basin, but I can't drive the hot water pressure to zero, and therefore can't remove the valve. I have a combi boiler in the vault, a hot water cylinder in the cupboard, and a water storage tank on the roof. I closed the "Hot...
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    Hot water Recirculation Cycle Problem

    My house has a low pressure gravity system. It uses a Drayton Lifestyle LP722 timer w/ two HW (hot water) and CH (central heating) cycles each, and a Grundfos UPS 15-50 hot water recirculation pump. The electrics are wired into a Honeywell junction box. There two hot water loops, one for the...
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