Sanden Heat Pump - Owner
’
s Manual
Page 14 of 20
Sanden Heat Pump – Owner’s Manual
Page 14 of 20
Water Supply Quality
Chloride, Water Hardness and pH
In high chloride water supply areas, the water can corrode some parts and cause them
to fail. Where the chloride level exceeds 200 mg/litre or Water Hardness level exceeds
200 mg/litre warranty does not apply to the heat pump unit and tank unit. pH is a
measure of whether the water is alkaline or acid. In an acidic water supply, the water
can attack the parts and cause them to fail.
No warranty applies to the heat pump unit and tank unit where the pH is less than 6.5
or more than 8.5. The water supply from a rainwater tank unit in a metropolitan area is
likely to be corrosive due to the dissolution of atmospheric contaminants.
Water with a pH less than 6.5 may be treated to raise the pH. It is recommended that
an analysis of the water from a rainwater tank be conducted before connecting this
type of water supply to the system.
Figure 7
Change of water supply
Changing, or alternating, from one water supply to another can have a detrimental
effect on the operation and/or life expectancy of the water tank unit cylinder, PTR valve,
water heating circulation and the water heat exchanger in the system. Where there is a
changeover from one water supply to another, for example, a rainwater tank 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
the water should be tested to ensure it meets the warranty requirements in this manual.
