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OUTLET TEMPERATURE COMPENSATION ADJUSTMENT – RHEEMPLUS
The maximum outlet temperature of a RheemPlus water heater may be adjusted to compensate for
temperature losses in the pipe work between the water heater outlet and sanitary fixtures.
Warning: After adjustment of the temperature limiting valve, the water temperature MUST NOT exceed
50°C from the first tap in the hot water pipe work after the water heater used for personal hygiene purposes,
such as in a bathroom or ensuite.
To adjust the maximum outlet temperature:
Ensure the temperature of the water in the water heater is up to the thermostat setting on the water
heater.
The temperature of the water can be measured at the temperature pressure relief valve drain discharge
point. Do not measure this temperature from a hot tap.
Operate the easing lever on the temperature pressure relief valve and place the thermometer in the
flow of water from the relief valve drain line.
Remove the upper plastic casing and insulation
covering the pipe work on the side of the water
heater, by removing the three (3) retaining
screws, to expose the temperature limiting valve.
Locate the first hot tap in the hot water pipe work
after the water heater used for personal hygiene
purposes.
Turn on the hot tap fully to achieve maximum
flow.
Using a thermometer, measure the temperature
of the water from the tap, until the temperature
stops increasing.
If the water temperature is below 50°C the
maximum outlet temperature of the water heater
can be adjusted upwards.
Turn the adjusting knob on the temperature
limiting valve counter-clockwise (down away
from the water heater), using a 6 mm Allen key.
Turning the adjusting knob counter clockwise
(down away from the water heater) increases the
outlet water temperature, turning it clockwise (up
towards the water heater) decreases the outlet
water temperature.
Repeat the water temperature measurement
from the same hot tap.
Further adjust the temperature limiting valve as required, turning the adjusting knob either counter
clockwise (down away from the water heater) or clockwise (up towards the water heater) to increase or
decrease the outlet water temperature, until an acceptable water temperature not exceeding 50°C is
measured at the same hot tap.
Note: The valve has a stop point for both maximum and minimum outlet water temperature adjustment.
The outlet water temperature cannot be increased or decreased beyond these points. It is possible that,
depending upon valve tolerances and the pipe work design, 50°C water temperature may not be
attainable at the hot tap.
Turn off the hot tap.
Replace the insulation and plastic casing to cover the temperature limiting valve and pipe work on the
side of the water heater and secure using the three (3) retaining screws.
RHEEMPLUS CASING REMOVAL
RHEEMPLUS TEMPERATURE ADJUSTMENT
39
COMMISSIONING
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