Rheem 311 Series Owner's Manual And Installation Instructions page 36

COMMISSIONING
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
away from the water heater),
using a 6 mm Allen key.
Turning the adjusting knob
counter clockwise
away from the water heater)
increases the outlet water
temperature,
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.
(down
(down
turning it
RHEEMPLUS TEMPERATURE ADJUSTMENT
36