Was out and about today and i saw a Bosch 25e highflow that was recessed into a wall cavity,only about 20mm of the front,mainly the front cover was protruding from the wall,it had a galvanised finned cover underneath that was screwed to the exterior plastered type wall surface for access to the isolating valves. Above the appliance say about 250-300mm i noticed an oval shaped externally mounted outside light fitting slightly bigger than a can of coke. Was looking in 5261 under minimum clearances for flue terminals to electrical fittings and the only reference was to an electrical meter or fuse box. It did have a small say 30mm angled flashing above the recessed hole the appliance was in as possible heat deflection although it was not in any way covering or obstructing the external front flue outlet. I dont think its dangerous how it is but want to know what others think and if it is in breach of the code,as i will then go tell that particular homeowner the lights got to be moved,or removed.
Also just out of interest for myself, have put in quite a few water heaters of the instantaneous type in the last few years and i have been asked on more than one occasion even when ive been on a property for a un-related plumbing or gasfitting matter why they turn on for a second or so when a cold tap inside the home is operated. The best answer i can come up with for them is usually something along the lines of the drop in water pressure on the appliances inlet valve causes a momentary pre-cycle start up as it adjusts itself to a much lower operating pressure,followed by theres not much that can be done etc... Can anyone put me on the right track??
Comments and opinions would be well recieved,always enjoy learning something new as often as possible Linkback: http://www.plumbers.co.nz/forum/instantaneous-water-heaters/67/general-instantaneous-water-heater-installation-questions/1068/