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TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater on completion of the installation, such as on a building site
or where the premises is vacant, then;
Switch off the electrical supply at the isolating switch to the water heater.
Close the cold water isolation valve at the inlet to the water heater.
DRAINING THE WATER HEATER
Switch off the electrical supply at the isolation switch to the water heater.
Close the cold water isolation valve.
Operate the relief valve easing lever to release the pressure in the water heater.
Drain the water heater through the drain valve or plug.
Undo the top outlet union or operate the relief valve easing lever again to let air into the water
heater and allow the water to drain.
WHAT YOU NEED TO KNOW ABOUT WATER QUALITY
WATER SUPPLY CHEMISTRY
Water quality can have a detrimental effect on water heater operation, components and life expectancy
and may affect warranty.
Warning: 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. This water heater must only be connected to a water
supply which complies with these specifications for the Rheem warranty to apply. If you are unsure of
your water chemistry, you may be able to obtain information from your local water supply authority or
you can contact Rheem and we will provide you with contact details of a suitable agency capable of
testing your water for compliance with Rheem standards. Water quality tests must be carried out at the
owner’s cost.
Water Chemistry Levels Affecting Warranty
The Rheem warranty of this Stainless Steel water heater will not cover resultant faults on components
including the storage cylinder where water stored in the storage cylinder exceeds at any time any of
the following levels:
Total dissolved solids 600 mg/Litre
Total hardness 200 mg/Litre
Chloride 300 mg/Litre
Magnesium 10 mg/Litre
pH 8.5 and not less than 6.5
Calcium 20 mg/Litre
Sodium 150 mg/Litre
Iron 1 mg/Litre
Note on Total Dissolved Solids (TDS)
The Rheem warranty will not cover resultant faults to the storage cylinder if this water heater is
connected at any time to a water supply where the TDS content of the water exceeds 600 mg/L. Some
water analysis reports may state the conductivity of the water rather than the level of total dissolved
solids. Conductivity, measured in microsiemens per centimetre (μS / cm), is directly proportional to the
TDS content of the water. TDS, in mg/L, is approximately 70% of the conductivity in μS / cm.
In locations where TDS approaches 600 mg/L, e.g. due to sediment, we strongly recommend fitting an
appropriate filter to ensure water entering, or in the water heater, does not exceed this level at any time
i.e. due to sediment build up.
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