Rheem 874 Owner's Manual And Installation Instructions page 5

MAINS PRESSURE
The water heater is designed for direct connection to the mains water supply. If the mains supply pressure in
your area exceeds that
should be greater than 140 kPa for the rated flow and performance to be achieved.
HOW HOT SHOULD THE WATER BE?
The water heater may be installed with one or more user
adjustable temperature controllers, which allow you to choose
the most suitable temperature for your hot water needs (refer
"Temperature Control"
to
If a controller is not installed, the water heater heats the water
to the factory preset outlet temperature setting.
The preset outlet temperature setting is:
874 series 55°C
872 series 55˚C
The preset outlet temperature setting of this water
Note:
heater cannot be adjusted by the householder. The setting
can only be adjusted by the installer, or a Rheem Service
Centre.
If this water heater is installed as part of a solar water heater
system, the installer has checked and if required, adjusted the
preset outlet temperature setting to:
864 series 75 C
862 Series 70ºC
A tempering valve must be installed as per AS/NZS3500.4 requires you to do so.
Warning: Temperature controllers must not be fitted to this water heater (874 series) as part of a solar
water heater system. This is because the water can be supplied at a temperature much higher than the
controller temperature setting. If a solar preheater has been installed to an existing water heater installation,
then all controllers must be disconnected and removed.
If this water heater is installed as part of a solar water heater system, the system can deliver water at
temperatures from 58 C up to 75 C and possibly higher depending upon the model of solar water heater
installed.
HOTTER WATER INCREASES THE RISK OF SCALD INJURY
This water heater can deliver water at temperatures which can cause scalding. Check the water temperature
before use, such as when entering a shower or filling a bath or basin, to ensure it is suitable for the
application and will not cause scald injury.
The factory preset temperature setting of an 874 and 872 series water heaters will not deliver temperatures
exceeding 55 C. There is no requirement in AS/NZS 3500.4 to fit a temperature limiting device unless the
water heater is supplying hot water to an early childhood centre, school, nursing home or a facility for young,
aged, sick or disabled people.
shown on page 44, a pressure limiting valve must be fitted. The supply pressure
on page 9).
ABOUT YOUR WATER HEATER
5
maximum temperature 862
series (82ºC)
maximum temperature 864
series (75ºC)
maximum Kitchen controller
temperature setting 874 &
872 series
maximum recommended
supply temperature to
bathrooms and ensuites.
maximum Bathroom
controller temperature setting
874 & 872 series
Minimum Kitchen and
Bathroom controller
temperature setting