Rheem 511161 Owner's Manual And Installation Instructions page 8

ABOUT YOUR WATER HEATER
PRECAUTIONS
Where damage to property can occur in the event of the water heater leaking, the water heater must be
installed in a safe tray. Construction, installation and draining of a safe tray must comply with AS/NZS 3500.4
and all local codes and regulatory authority requirements.
The water heater must be maintained in accordance with the Owner's Guide and Installation Instructions. Refer
"Maintenance Requirements"
to
If this water heater is to be used where an uninterrupted hot water supply is necessary for your application or
business you should ensure that you have 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 were to become inoperable for any
reason. We recommend you seek advice from a plumber or specifier about your needs and building back-up
redundancy into your hot water supply system.
FREEZE PROTECTION
The system has a level of freeze protection designed to guard the system against damage from freeze
conditions. The system must be installed with the full length of the solar hot and solar cold pipes insulated and
power must be available at the solar control unit to offer protection against freeze damage (refer to
Plumber – Be Aware"
on page 41). Freeze conditions occur below 6°C.
Note: The Rheem warranty against freeze damage applies only to systems installed in Australia.
The system has NO WARRANTY for freeze damage when installed above 400 metres altitude or if the solar
hot and solar cold pipes are not insulated in accordance with the installation instructions or if power is not
available at the solar control unit (refer to
The anti-freeze control is designed to recirculate a small amount of water from the solar storage tank through
the solar pipe work and solar collector(s) during periods of low temperatures. This is to prevent the water inside
the pipe work and solar collector(s) from freezing. It is essential the electrical circuit to the solar control unit is
continually turned on if there is a risk of freezing. The Rheem warranty does not cover damage caused by
freeze conditions when the electrical circuit to the solar control unit is turned off or interrupted.
Additional freeze protection is provided by the anti-freeze heating unit. The anti-freeze heating unit is for
heating the water at the bottom of the solar storage tank at times of low cold water temperature. The anti-
freeze heating unit provides additional energy to the water to assist in the prevention of freezing in the solar
pipe work and solar collector(s). The anti-freeze heating unit is controlled by the solar controller and will only
be energised when the water temperature is very low and the circulator activates in the Freeze Protection
operation mode. The water temperature is monitored by the cold sensor.
If the water temperature at the bottom of the solar storage tank is very low when the circulator activates in the
Freeze Protection operation mode, the anti-freeze heating unit will be energised and will heat the water by a
few degrees. The anti-freeze heating unit will be de-energised when either the frost mode is shut down or the
water temperature has risen by a few degrees.
The anti-freeze heating unit is supplied with power from the solar control unit. The power outlet to the solar
control unit must be switched on for the anti-freeze heating unit to operate and offer additional freeze
protection.
An over-temperature energy cut-out is incorporated in a thermostat which is mounted on the solar storage tank
behind the front cover.
Notes:

The system is not covered for freeze damage above 400 metres altitude.

The freeze protection system will be rendered inoperable if electrical power is not available at the solar
control unit. Damage caused by freezing due to no power at the solar control unit, is not covered by the
Rheem warranty.

If it is necessary to switch the power off to the solar control unit and there is a risk of freezing, then it is
necessary to have a plumber drain the solar collector(s) and solar hot and solar cold pipes.

"Terms of the Rheem Warranty"
Refer to
"Anode Inspection and Replacement"
on page 12 and to
"Terms of the Rheem Warranty"
on page 58.
8
on page 16.
on page 58).
"Warning: