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INSTALLATION
Note: The water heater should not be placed in direct contact with a concrete surface that is less than two
months old and not fully cured as this may attack the metal coating of the water heater base. A moisture barrier
should be used between the two surfaces in this instance. The barrier should extend at least 100 mm from the
water heater and may be trimmed after two months.
Remember all local authorities have regulations about putting water heaters into roof spaces.
For a single water heater installation, follow the
follow the
instructions on pages
SAFE TRAY
Under certain installation conditions where damage to property can occur
in the event of the water heater leaking AS/NZS 3500.4 requires the water
heater be installed in a safe tray. Construction, installation and draining of
a safe tray must comply with AS/NZS 3500.4 and all local codes and
regulatory authority requirements. In New Zealand the safe tray must also
meet the requirements of Clause G12 of the New Zealand Building Code.
AS/NZS 3500.4 and the NZBC also have particular requirements when a
safe tray must be installed. Alternatively, where additional leak protection
is required for installations not defined by AS/NZS 3500.4, a suitable bund
may be constructed to surround the water heater in lieu of using a safe tray.
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
Model
Temperature pressure relief valve setting
Expansion control valve setting*
Maximum mains supply pressure
With expansion control valve
Without expansion control valve
* Expansion control valve not supplied with water heater
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a pressure pump system is not installed, then
the bottom of the supply tank must be at least 1 m above the highest point of the hot water plumbing system,
including the water heater. Care must be taken to avoid air locks. The cold water line to the water heater should
be adequately sized and fitted with a full flow gate valve or ball valve.
BOOSTER WATER HEATER INSTALLATION
It can be advantageous to plumb the Stainless steel heavy
duty electric water heater as a booster water heater in some
cases. In this type of installation, the water heater is plumbed
into a hot water circuit, with hot water being supplied to the
inlet of the water heater. The hot water is then boosted to a
higher temperature. This may be necessary to achieve a
particular temperature when required for certain applications.
Isolation valves are required on the inlet line to and the outlet
line from the water heater.
"Safe Tray"
Refer to
on page 20.
SADDLING PIPE WORK
To prevent damage to the cylinder when attaching pipe clips or saddles to the water heater jacket, we
recommend the use of self-drilling screws with a maximum length of 13 mm. Should pre-drilling be required,
extreme caution must be observed when penetrating the jacket of the water heater.
Note: If the cylinder is damaged as a result of attaching pipe clips or saddles to the jacket, any resultant
faults will not be covered by the Rheem warranty.
diagram on page
30
to
33.
cold water connection diagram
050, 315
1000kPa
850kPa
680kPa
800kPa
20
24. For multiple water heater installations,
on page 25.
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