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This water heater is intended to be permanently connected to the water mains
and not connected by a hose-set. A braided flexible hose or semi-flexible
connector may be used for connection to the water heater, where permitted by
AS/NZS 3500.4.
PIPE SIZES
To achieve true mains pressure operation, the cold water line to the water heater
should be the same size or bigger than the hot water line from the water heater.
The pipe sizing for hot water supply systems should be carried out by persons
competent to do so, choosing the most suitable pipe size for each individual
application. Reference to the technical specifications of the water heater and
local regulatory authority requirements must be made.
TEMPERATURE PRESSURE RELIEF VALVE
The temperature pressure relief valve is shipped behind the front cover. The
temperature pressure relief valve must be fitted before the water heater is
operated. Before fitting the relief valve, make sure the probe has not been bent.
To fit the relief valve:
• Seal the thread with an approved thread sealant such as Teflon tape - never
hemp. Make sure tape does not hang over the end of the thread.
• Hand tighten the valve into the opening marked "Relief Valve" (refer to the
installation diagram
• Using a spanner engaged on the valve's spanner flats and applying medium
pressure to tighten, turn the relief valve an additional ½ to 1 ½ turns to secure
and make the joint water tight, leaving the valve drain pointing downwards.
Warning: Do not use a pipe wrench or poor fitting tool on the valve body
nor over tighten the valve, as this could damage the valve and prevent safe
operation.
• Operate the easing lever on the valve to check the smooth operation of the
valve plunger. It is very important the lever is raised and lowered gently. The
lever should move smoothly and without undue force.
If the lever cannot be moved or is jerky in its movement, then the valve has
been damaged and must be replaced.
• A copper drain line must be fitted to the temperature pressure relief valve
(refer to
"Relief Valve Drain"
• The valve must be insulated with closed cell polymer insulation or similar
(minimum thickness 9 mm) and the insulation installed so as not to impede
the operation of the valve.
The insulation must be weatherproof and UV resistant if exposed.
on page 34).
on page 38).
37
CONNECTIONS – PLUMBING
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