Paloma PH-246CWHA, Owner'S Manual And Installation Instructions

Page: 41 / 80

40
WATER SUPPLIES
This water heater must be installed in accordance with this advice to be covered by the Paloma
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
Paloma 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 heat exchanger in a continuous flow 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 Paloma
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 Paloma warranty does not
apply to a copper heat exchanger in a continuous flow 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 +0.80, the Paloma warranty does not apply to a
copper heat exchanger in a continuous flow water heater.
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 41.