Rheem 743 series Owner's Manual And Installation Instructions page 6

HOW YOUR BOILING WATER UNIT WORKS
HOW LONG WILL THE BOILING WATER UNIT LAST?
There are a number of factors that will affect the length of service the boiling water
unit will provide. These include the water quality, the water usage pattern etc.
However, your boiling water unit is supported by a comprehensive warranty (refer
"Warranty" on page 30). The boiling water unit is designed to operate using mains
water pressure by connecting directly to the mains water supply. If the mains supply
pressure in your area exceeds 1000kPa a secondary pressure limiting valve must be
fitted. The water supply pressure is recommended to be greater than 350kPa for the
Rheem boiling water unit's optimum performance. Water pressure lower than 350kPa
will reduce the performance of the boiling water unit (and water chiller if installed). A
supply pressure as low as 100kPA can be used, however cold water delivery will be
reduced.
PRECAUTIONS
The boiling water unit must be maintained in accordance with the Owner's Guide and
Installation Instructions.
If this boiling water unit is to be used where an uninterrupted boiling water supply is
necessary for your application or business you should ensure that you have back up
redundancy within the building. This should ensure the continuity of boiling water
supply in the event that this boiling water unit were to become inoperable for any
reason. We recommend you seek advice from your plumber or specifier about your
needs and building back up redundancy.
BOILING WATER
The Rheem boiling water unit is electronically controlled to obtain the maximum
performance, and incorporates further safety devices to prevent over temperature
and over filling.
ELECTRONIC CONTROLLER & TIMER
Your Rheem boiling water unit incorporates smart heating software and an electronic
timer to obtain the best efficiency for the energy used. The electronic timer allows the
user to program when the unit is on or off and when the sleep mode activates to save
energy. Also the unit has the ability to indicate and diagnose any system faults that
occur. (Refer "Setting the Timer" on page 8).
ENVIRONMENT
If a chiller unit is installed, at the end of the service life and prior to the chiller being
disposed of, a person qualified to work with refrigerants must recover the refrigerant
from within the sealed system. The refrigerant must not be vented to atmosphere.
Phone your nearest Rheem Service Department or Rheem Service Centre to arrange
for an inspection.
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Rheem New Zealand Ltd 743 Series BWU Document #: 318489B