Water Supplies - Rheem 953060DP Owner's Manual And Installation Instructions

WATER SUPPLIES

This water heater must be installed in accordance with this advice to be
covered by the Rheem warranty.
This water heater is manufactured to suit the water conditions of most public
reticulated water supplies. However, there are some known water chemistries
which can have detrimental effects on the water heater and its operation and / or
life expectancy. If you are unsure of your water chemistry, you may be able to
obtain information from your local water supply authority. This water heater
should only be connected to a water supply which complies with these guidelines
for the Rheem's warranty to apply.
CHANGE OF WATER SUPPLY
The changing or alternating from one water supply to another can have a
detrimental effect on the operation and / or life expectation of a number of
components in this water heater.
Where there is a changeover from one water supply to another, e.g. a rainwater
tank supply, bore water supply, desalinated water supply, public reticulated water
supply or water brought in from another supply, then water chemistry information
should be sought from the supplier or it should be tested to ensure the water
supply meets the requirements given in these guidelines for the Rheem warranty
to apply.
SATURATION INDEX
The saturation index (SI) is used as a measure of the water's corrosive or scaling
properties.
Where the saturation index is less than –1.0, the water is very corrosive and the
Rheem warranty does not apply to the water heater. In a corrosive water supply,
the water can attack copper parts and cause them to fail.
Where the saturation index exceeds +0.40, the water is very scaling and an
expansion control valve* must be fitted on the cold water line after the non-return
valve. The Rheem warranty does not apply to the water heater.
Where the saturation index exceeds +0.80, the Rheem warranty does not apply
to a copper heat exchanger or the copper pipe work in the heat pump assembly.
Water which is scaling may be treated with a water softening device to reduce
the saturation index of the water.
Refer to the Saturation Index chart on page 22
* .
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