4
ABOUT YOUR WATER HEATER
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.
MODEL TYPE
The Vulcan
®
continuous flow water heater model you have chosen is for outdoor installation only.
This water heater has been installed as an in-series gas booster to a solar water heater. For information
relating to the function and operation of the solar water heater, refer to the Owner‟s Guide and Installation
Instructions supplied with the solar water heater.
GAS BOOSTING FOR A SOLAR WATER HEATER
Water stored in the solar storage tank passes through the in-series gas booster when a hot tap is opened.
The in-series gas booster is for heating water at times of low solar energy gain, such as during cloudy or
rainy weather, or during colder months.
Solar heated water can reach temperatures up to 70°C to 80°C for a
Vulcan solar direct or indirect pumped system and possibly higher for some
other models of solar water heaters. The in-series gas booster operates
automatically. When the solar heated water temperature is 58°C or higher,
the flow passes through the in-series gas booster without boosting. When
the solar heated water temperature is below 58°C, the in-series gas
booster heats the water to its preset outlet temperature setting.
WATER HEATER OPERATION
The water heater operates automatically if heating of the water is required.
When a hot tap is opened and the solar heated water temperature is below
58°C, the gas burners ignite to provide immediate heating of the water to
its preset outlet temperature setting as the water passes through the water
heater. The heat produced by the burner is transferred to the water through
the heat exchanger. The water is heated to a constant temperature by the
automatic adjustment of the gas supply to the burner to suit the water flow
rate. The gas burners extinguish when the hot tap is closed.
Automatic safety controls are fitted to the water heater to provide safe and efficient operation.
HOW HOT SHOULD THE WATER BE?
The solar water heater will deliver water at temperatures up to 70°C to
80°C for a Vulcan solar direct or indirect pumped system and possibly
higher for some other models of solar water heaters.
During periods of low solar energy gain, the in-series gas booster will boost
the water temperature automatically to its preset outlet temperature setting.
The factory preset outlet temperature setting is 60°C.
Note:
The preset outlet temperature setting of this water heater cannot be
adjusted by the householder. The setting can only be adjusted by the
installer, Rheem Service or their nearest Accredited Service Agent.
Note:
AS 3498 requires that a water heater provides the means to inhibit
the growth of Legionella bacteria in potable water. When this water heater
is used as an in-series booster for a solar water heater it can satisfy this
AS 3498 requirement provided it is energised, the booster preset outlet
temperature setting is 70°C or higher, and that a remote temperature
controller is not used.
Warning:
Temperature controllers
must not
be fitted to this water heater as part of a solar water heater
system because water at a temperature much higher than the controller setting can be delivered.
factory preset outlet
temperature setting
maximum
recommended supply
temperature to
bathrooms and
ensuites
maximum preset outlet
temperature setting
244 027 models
