Rheem Guardian Warm Water Owner's Manual And Installation Instructions page 22


Switch on the electrical supply to the circulator(s).

If necessary, remove the temperature knob and hub using the 3mm allen key supplied.

Rotate the spindle(s) of the thermostatic mixing valve(s) fully anti-clockwise (ie full hot)

Measure the temperature at the cold water inlet test point in the warm water unit.

When the system has reached at least 60C allow the water to circulate for at least 1 hour. During this
period it is recommended the pipe work be checked again for leaks.
Note: if the system temperature fails to reach 60C check the temperature setting of the water heating plant.
SETTING THE TEMPERATURE
For multiple valve systems, each valve should be set individually and then the whole system checked for overall
performance.
Test points are provided for convenient temperature measurements.
1. Ensure the warm water return circulator is turned off and isolated during this procedure.
2. Open the cold and hot water isolating valves on the first mixing valve and isolate the second & third mixing
valve, if applicable.
3. Remove the temperature knob using the 3 mm Allen key (supplied)
4. Pull off the hub (refer to Figure 1)
5. Open a warm water tap or the test/drain tap so that a flow rate in excess of 8 L/min is achieved.
6. Rotate the spindle until the required maximum blend temperature is obtained at the test point.
(CLOCKWISE = DECREASE TEMPERATURE, ANTICLOCKWISE = INCREASE TEMPERATURE)
When resistance is felt do not use force to turn any
further, as this can damage the internal parts.
7. Once the desired maximum blend temperature is
achieved, re-fit the hub without disturbing the spindle,
positioning it so that the centre stop slot in the hub fits over
the top of the cartridge stop (refer to Figure 2), preventing
any further rotation in either direction. Check that the blend
temperature has not altered.
8. Refit the temperature knob. Make sure that the indicator
points to 6 o'clock.
9. Record the temperature measured at the test point in the
Commissioning Log on page 23.
10. Isolate the first valve and repeat steps 2 to 9 for the
second and third valves in turn.
11. When complete, open all mixing valves in the system.
Open sufficient taps to at least exceed the minimum flow
rate required for the system (refer pg 7) and check
temperature at the test point on the warm water system,
and the nearest warm water outlet in the building.
12. Open more taps in the building to create a high flow and check and record temperatures at the test point and
nearest warm water outlet.
Note: depending on the layout of the establishment, it may be necessary to adjust the temperature leaving the
warm water system to achieve the required temperature at the nearest outlet.
CHARGING THE SYSTEM
Turn on the warm water return circulator and set to the highest speed.
Water in the warm line will begin to return to the mixing plant. Monitor the return temperature. Rheem Guardian
is capable of maintaining system temperature with a differential between outlet and return of 2C. System design
will dictate the actual differential achievable.
Note: if the system was filled with hot water for sanitising, the system may need to be flushed at the furthest
outlet prior to turning on the pump, until all hot water is removed from the system.
COMMISSIONING
22
centre stop slot
Fig 2