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INSTALLATION
22
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 cold water connection diagram on page 29.
Model
050 to 160
250, 315
Temp pressure relief valve setting
1400 kPa
1000 kPa
Expansion control valve setting*
1200 kPa
850 kPa
Max. mains supply pressure
With expansion control valve
960 kPa
680 kPa
Without expansion control valve
1120 kPa
800 kPa
* 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.
WATER CHEMISTRY
Water chemistry which can have a detrimental effect on the water heater and its
operation and / or life expectancy. Refer to “Water Supplies” on page 13 for
information on water chemistry and its effect on the water heater.
It is recommended to install a suitable filter on the cold water supply line to the
water heater if the water supply contains or has a future risk of containing
suspended solids. The Rheem warranty will not cover resultant faults on
components including the stainless steel cylinder due to the effects of sludge
and / or sediment settling in the water heater.
REDUCING HEAT LOSSES
The cold water line to and the hot water line from the water heater must be
insulated in accordance with the requirements of AS/NZS 3500.4. The insulation
must be weatherproof and UV resistant if exposed.
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