RHEEM THERMAL AIR SOURCE HEAT PUMP INSTALLATION, MAINTENANCE & SERVICE MANUAL
RHEEM HOT WATER SYSTEM (ASEAN REGION)
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RECOMMENDED CIRCULATING PUMP FLOWRATE
UNIT
FLOWRATE L/S
RTHW25
1.01
RTHW30
1.16
RTHW40
1.57
RTHW50
2.09
RTHW65
2.17
RTHW80
3.13
RTHW105
4.19
RTHW135
5.41
1.2.1 Water Quality
The heat pump must be installed in accordance with this advice to be covered by the
Rheem Thermal Warranty.
This heat pump is manufactured to suit the water conditions of most public reticulated
water supplies. However there are some known water chemistries which can have a
detrimental effects on the heat pump 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 heat pump should only be connected to a water supply
which complies with these guidelines for the Rheem Thermal warranty to apply.
1.2.2 Change of Water Supply
The changing or alternating from one water supply to another, e.g. a rain water supply,
bore water supply, desalinated water supply, public reticulated water supply or water
bought in from another supply, then water chemistry should be tested to ensure the
water supply meets the requirements given in these guidelines for the Rheem Thermal
warranty to apply.
1.2.3 Saturation Index
The saturation index (SI) is used as a measure of the waters corrosive
or scaling properties. Where the saturation index is less than -1.0, the water is very
corrosive and the Rheem Thermal warranty does not apply to the heat pump. In a
corrosive water supply, the water can attack copper parts and cause them to fail. Water
which is scaling may be treated with a water softening device to reduce the saturation
index of the water.
