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INSTALLATION
14
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 floor
level and must stand vertically upright. There
are 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:
• 15,000 mm
2
for a 25 MJ model
• 18,000 mm
2
for a 30 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.
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below,
an approved pressure limiting valve is required and should be fitted as shown
in the installation diagram (refer to diagram on page 20).
Model 130 – 170
Relief valve setting 1400 kPa
Expansion control valve setting * 1200 kPa
Max. mains supply pressure
With expansion control valve 960 kPa
Without expansion control valve 1120 kPa
* Expansion control valve not supplied with the water heater.