ABOUT YOUR WATER HEATER
7
TEMPERATURE ADJUSTMENT
This water heater has two forms of water temperature adjustment:
A temperature dial on the gas control (thermostat) – this controls the water
temperature inside of the storage cylinder.
An adjustable water mixing valve – this controls the delivered water
temperature from the water heater.
Gas Control Temperature Dial
The temperature dial is on the gas control, located behind the access cover on
the lower front of the water heater.
The thermostat is adjustable up to
approximately 75°C. Each number represents
a temperature difference of approximately
10°C. When aligned with the temperature dial
position indicator on the gas control body, a
setting of mid way between „3‟ and „4‟ will
normally maintain the water temperature at
about 60°C.
To increase the water temperature to 75°C,
turn the gas control knob anticlockwise to a
setting of „5‟. Refer to “Hotter Water Increases
the Risk of Scald Injury” on page 5.
Adjustable Water Mixing Valve
The Rheem Stellar 330 stainless steel model has a user adjustable water
mixing valve. The adjustment dial is located on the left hand side of the water
heater, between the cold water inlet and hot water outlet connections.
The valve can be adjusted to increase or decrease the hot water temperature
delivered by the water heater by mixing cold water from the water supply with
hot water from the storage cylinder. This can allow hot water to be delivered
below 50°C whilst the stored water is maintained at or above 60°C.
Warning: This adjustable water mixing valve cannot be used as the
approved temperature limiting device, if one is required by regulations to be
installed into the hot water pipe work to the bathroom and ensuite or other
ablution areas.
Adjusting the dial of the adjustable water mixing valve to position „5‟ will allow
water to be delivered at the stored temperature of the water heater (no mixing
with cold water). Each number represents a temperature difference of
approximately 5°C, with an incremental increase of cold water mixing with the
hot water to reduce the delivered water temperature.
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