Commissioning - Rheem Guardian Warm Water Owner's Manual And Installation Instructions

Commissioning must be carried out in accordance with these instructions, and must be conducted by
qualified and competent personnel.
Rheem provides a comprehensive commissioning service, which may have been included with the purchase of
the warm water system. Call the nearest Rheem Service Department to arrange for commissioning if required.
Note: if not included in the purchase price, a commissioning fee will be applicable.
CHECKLIST
Check the following items prior to commissioning the warm water system:

The warm water unit is installed in accordance with these installation instructions.

UV system is installed in accordance with the UV Owners Guide and Installation Instructions and the power
is turned off.

Water heating plant is installed and commissioned in accordance with the relevant instructions.

Water supply lines have been flushed and cleaned.

Line strainers have been cleaned

Water in storage cylinders is hot (>60

Valve on UV chamber outlet is open.
MAXIMUM TEMPERATURE
The maximum blend temperature obtainable by the user should be set in accordance with AS3500.4 and local
regulations depending on the application.
The thermostatic mixing valves are fully performance tested individually and the maximum blend temperature is
pre-set at the factory to approximately 43
Site conditions, sanitising prior to commissioning or personal preference will mean the maximum blend
temperature has to be re-set following installation.
Temperatures should always be recorded using a calibrated thermometer with suitable accuracy.
EXERCISING THE THERMOSTAT
Thermostatic mixing valves with wax thermostats are inclined to
lose their responsiveness, if not used. Valves which have been
in storage, installed but not commissioned, or simply not used
for some time should be exercised before setting the blend
temperature or carrying out any tests.
A simple way to provide this exercise is:
1. Ensure that the hot and cold water are available at the valve
inlets, and a warm water outlet is open.
2. Remove the temperature knob and hub using the 3mm
allen key supplied (refer to Figure 1)
3. Move the spindle by hand (do not use tools) rapidly to the
clockwise limit, and pause.
4. Move the spindle rapidly to the anti-clockwise limit, and
pause.
5. Repeat Steps 3 and 4 several times.
6. Repeat for each valve in the unit.
7. Close the warm water outlet.
SANITISING THE SYSTEM
DANGER! During the sanitising procedure, hot water at
scalding temperatures will be delivered to the warm water
outlets. Warm water outlets must not be used while
sanitising is taking place, except as detailed in the procedure below.

COMMISSIONING

o
C).
o C under ideal installation conditions.
21
spindle
inside face of hub
hub
temperature knob
Fig 1