Water Supplies - Raypak B0507 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 supplies which can have detrimental effects on the water heater and its operation
and/or life expectancy. If you are unsure of your water quality, 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 water heater Rheem warranty to apply.
SATURATION INDEX
The saturation index (SI) is used as a measure of the water‟s corrosive or scaling properties.
In a corrosive water supply, the water can attack copper parts and cause them to fail. Where the saturation index is
less than –1.0, the water is very corrosive and the Rheem warranty does not apply to a copper heat exchanger in a
Raypak water heater.
In a scaling water supply calcium carbonate is deposited out of the water onto any hot metallic surface. Where the
saturation index exceeds +0.40, the water is very scaling. An expansion control valve must be fitted on the cold
water line after the non-return valve to protect and for the Rheem warranty to apply to the pressure relief valve on
the Raypak water heater and the temperature pressure relief valve and cylinder of the storage tank connected to
"Cold Water Connection Plumbing Diagram"
the system. Refer to the on page 15 for the position of the expansion
control valve.
Where the saturation index exceeds +0.80, the Rheem warranty does not apply to a copper heat exchanger in a
Raypak water heater.
Water which is scaling may be treated with a water softening device to reduce the saturation index of the water.
The following chart details how the Rheem warranty applies according to the saturation index.
SATURATION INDEX (SI)
RAYPAK WATER HEATERS
WITHIN WARRANTY
SPECIFICATION
-1.0 0 +0.4 +0.8
SATURATION INDEX
(calculated @ 80°C water temperature)
scaling
very corrosive very scaling
corrosive
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 the water heater, the storage cylinder and the relief valves.
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.
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