INSTALLATION
INDOOR INSTALLATION
A secondary flue must be installed with an indoor water heater to discharge combustion products outside the building. The flue must be self supporting and not impose a load on the water heater. Use a slip joint or similar to allow for disconnection. There must be a vertical rise of 600 mm from the draught diverter before changing direction. The flue design and installation must comply with AS 5601. There are particular fluing requirements for a 631 275 model water heater installed with a room sealed installation kit. Refer to the installation instructions supplied with the kit.
For indoor models the distances set out in the diagram should be observed. Keep the water heater and flue at least 25 mm clear of walls, cupboards, timber or any other combustibles and at least 500 mm clear of curtains and furnishings.
The water heater is to be installed at ground or floor level and must stand vertically upright. There are also special requirements in AS 5601 for water heaters installed in a garage, an enclosed space and other locations. Remember all local authorities have regulations about putting water heaters into roof spaces.
If installed in a cupboard, an adequate air supply must be provided. For efficient water heater operation allow a free open space at both the top and bottom of the access door, each of at least:
•66,000 mm2 for each 110 MJ model
•120,000 mm2 for each 200 MJ model.
SAFE TRAY
It is a requirement of AS/NZS 3500.4 that for a new installation, a water heater be installed in a safe tray where in the event of a leak, property may otherwise be damaged. Construction, installation and draining of a safe tray must comply with the abovementioned Standard.
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