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8
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 Rheemglas
®
49 series or RheemPlus
TM
421 series water heater you have
chosen is suitable for either indoor or outdoor installation.
Rheemglas 49 series models are available with either a single heating unit or
with twin heating units and RheemPlus 421 series models are available with a
single heating unit only (refer to “Single Element Model” on page 11 and “Twin
Element Model” on page 11).
Water is stored in a vitreous enamel lined steel cylinder and heated by the
electric immersion heating unit. The thermostat controls the temperature.
Automatic safety controls are fitted to the water heater to provide safe and
efficient operation.
A 49 series water heater has caps
covering brass plugs on one side of the
tank. The plugs and caps block off
alternative connection points and are
not to be tampered with or removed.
HOW HOT SHOULD THE WATER BE?
The water heater features an adjustable
thermostat, which allows you to choose
the most suitable temperature for your
hot water needs. Refer to “Temperature
Adjustment” on page 9.
A RheemPlus 421 series water heater
is temperature limited to deliver water
not exceeding 50°C to sanitary fixtures
used primarily for personal hygiene
purposes.
To meet the requirements of the
National Plumbing Standard the
temperature of the stored water must
not be below 60°C.
minimum thermostat setting
and minimum recommended
stored water temperature.
top heating unit thermostat
setting on a twin element
model (not adjustable)
maximum thermostat setting
49 series 080 to 400 models
421 series 125 to 315 models
maximum recommended
supply temperature to
bathrooms and ensuites
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