Preset Temperature Adjustment - Rheem 874W27NF Service Manual

PRESET TEMPERATURE ADJUSTMENT

The water heater has a factory preset outlet temperature setting of 60°C however the Water
Star water saving function within the heater has a set point of 70°C (a quantity of water is
maintained within the cylinder at a fixed temperature, and water initially discharged by this
heater at start-up may be at a temperature of up to 70°C before the heater normalises to its
preset outlet temperature).
Voltages up to 240 volts will be present within the water heater, take care
not to touch wiring terminals. Use an insulated tool when operating the DIP
switch or MIN and MAX buttons.
To check or adjust the preset outlet temperature setting:
1. Remove the front cover from the water heater.
2. Switch dip switches 3 and 4 to the ON (up) position on the DIP1 set of dip switches on
the PCB.
3. The current preset outlet temperature setting will be displayed on the LED1 display at
bottom right hand side of water heater.
4. Press the MIN button to decrease or the MAX button to increase the preset outlet
temperature setting to the desired setting. (The MIN and MAX buttons are located below
the dip switches.)
5. Turn dip switches 3 and 4 to the OFF (down) position on the DIP1 set of dip switches on
the PCB.
6. The LED1 display will go blank. The preset outlet temperature is now set.
7. Refit the front cover to the water heater.
The preset outlet temperature settings are: 38°C, 40°C, 42°C, 43°C, 45°C, 50°C, 55°C,
60°C, 70°C and 75°C.
Notes: Setting the outlet temperature to less than 50°C IS NOT RECOMMENDED; if the
temperature is adjusted to less than 50°C the water saving function of the water heater will
not operate, resulting in added energy costs and nil water saving.
TM061 Rheem 27 Water Star Service Instructions – Issued: 11/10
REV A Issued 08/13
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Service. All printed copies not bearing this statement in RED are deemed "uncontrolled"
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