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WATER HEATER APPLICATION
This water heater is designed for use in a single family domestic dwelling for the purpose of heating potable
water. Its use in an application other than this may shorten its life.
If this water heater is to be used where an uninterrupted hot water supply is necessary for the application or
business, then there should be back-up redundancy within the hot water system design. This should ensure
the continuity of hot water supply in the event that this water heater was to become inoperable for any reason.
We recommend you provide advice to the system owner about their needs and building back-up redundancy
into the hot water supply system.
This water heater is designed to be installed as an electric boosted solar water heater with its booster heating
unit connected to a power supply, however it may be installed with an in-series continuous flow or storage
booster.
If this water heater is installed with an in-series booster, then the electric booster heating unit will not be
connected to a power supply and the references to the electric booster heating unit, thermostat and boosting
controls in these installation instructions will not be applicable to the installation.
Note: AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in
potable water. This water heater can satisfy this AS 3498 requirement provided the electric booster is
energised for a sufficient period each day and the electric booster thermostat setting is 60°C or higher.
If this water heater is installed with an in-series continuous flow gas booster, then this requirement of AS 3498
can be satisfied provided the booster is energised, its preset outlet temperature setting is 70°C or higher and
a remote temperature controller is not used.
If this water heater is installed with an in-series storage booster, then this requirement of AS 3498 can be
satisfied provided the storage booster is energised and its thermostat setting is 60°C or higher.
Installing the Water Heater as a Pre-Heater
This water heater can be used as a pre-heater to a new or existing in-series booster water heater provided:
•
The in-series booster water heater is;
thermostatically-controlled, and
◼
suitable to be used as an in-series booster water heater for a solar water heater.
◼
•
The operating pressures of the two water heaters are compatible or reduced to the lower rated of the two
water heaters.
•
The in-series booster water heater has sufficient thermal capacity to supply the hot water requirements of
the application during periods of low or no solar gain.
•
A temperature-operated bypass valve is installed prior to the in-series water heater if this water heater
has either an over temperature energy cut-out which can be permanently disabled by high temperature
hot water or a maximum recommended inlet supply temperature less than the temperature of water which
can be supplied by this solar water heater.
It will be necessary to check with the manufacturer of the in-series water heater as to its suitability for use as
an in-series booster to this solar water heater.
INSTALLATION – SOLAR STORAGE TANK
23
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