Rheem 511161 Owner's Manual And Installation Instructions page 24

INSTALLATION – SYSTEM
Note: AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in
potable water. 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 or an EZiSET kit 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.
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