Rheem 491 Owner's Manual And Installation Instructions page 9

ABOUT YOUR WATER HEATER
HOTTER WATER INCREASES THE RISK OF SCALD INJURY
This water heater can deliver water at temperatures which can cause scalding.
Check the water temperature before use, such as when entering a shower or
filling a bath or basin, to ensure it is suitable for the application and will not cause
scald injury.
We recommend and it may also be required by regulations that an approved
temperature limiting device be fitted into the hot water pipe work to the bathroom
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and ensuite when a Rheem 491/492 series water heater is installed. This will
keep the water temperature below 55°C at the bathroom and ensuite. The risk of
scald injury will be reduced and still allow hotter water to the kitchen and laundry.
THERMOSTAT
The thermostat automatically controls the electricity supply to the heating unit so
a constant temperature is maintained. The thermostat and its protective over
temperature cut out is mounted inside the front cover of the water heater. There
is no need to switch the water heater off when it is not in use, except when you
are on an extended holiday. The thermostat is fully automatic and power is only
used when heating is required.
TEMPERATURE ADJUSTMENT
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A Rheem 491/492 series water heater features a tradesperson adjustable
thermostat. This requires a licensed electrical worker to make any temperature
adjustments. The bottom thermostat (twin element models) has a maximum
temperature setting of 70°C and a minimum temperature setting of 60°C. The
top thermostat on a twin element model has a fixed setting of 60°C and cannot
be adjusted.
We advise you to have an authorised person adjust the thermostat to the lowest
temperature setting that meets your needs, especially if there are young children
or elderly people in your home. Refer to "Hotter Water Increases The Risk of
Scald Injury" on page 9.
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