Servicing And Maintenance - Kohler 32E Product Manual

3.
Operate the fixture(s) at full flow and intentionally "fail" the cold water supply to the Rada
32E. All flow through the fixture should shut off completely within 2 seconds. If flow does
not shut off to specification, refer to "Fault Diagnosis".

Servicing and Maintenance

Rada 32E Thermostatic Mixing Valves must be inspected and tested on a regular basis. We
recommend preventative maintenance procedures based on individual site conditions must be
employed to ensure continued and safe operation of the valve, for example site conditions such
as water with high mineral content may dictate an increased frequency. In lieu of any guidance
we would recommend at least 6 monthly checks be conducted to include the following – For
optimum performance and safety repeat steps 1-3 of the commissioning. Record and
report any variations to the Plant Management and the Plant Safety Officer. Annually we
recommend minimum changing Filters, oval seals on inlets of cartridge. See 'safety section'
for critical component replacement information.
Note! All seals are pre-lubricated. If further lubrication is required, use only silicone based
lubricants on this product. Do not use petroleum based lubricants.
The Rada 32E Thermostatic Mixing Valve is of non-serviceable single "cartridge construction".
The cartridge can be removed from the valve for inspection or replacement by first removing
the temperature control handle using a 3 mm hex wrench. The hub assembly may inadvertently
remain attached to the inside of the temperature control handle. This is a "push fit" and can
be "levered" out using a thin blade screwdriver or pliers.
Warning! The Rada 32E has a specially designed replacement cartridge.
Important! Do not install a replacement cartridge which does not have the 32E identifier.
The Temperature Indicator Ring, which fits beneath the temperature control handle can be
"levered" off using a suitable thin edged tool.
Before proceeding further be sure to isolate the valve by turning off each inlet supply.
The complete cartridge assembly is accessed by first removing the 6 retaining screws and
then smoothly drawing the cartridge out. Do not twist or apply "side load" leverage when
extracting the cartridge.
When installing a new or reinstalling an existing cartridge note the raised "H" on the hot inlet
of the cartridge and align to hot supply accordingly.
Important! After re-installing a replacement cartridge, the Rada 32E must be re-commissioned
and validated.
Warning! The Rada 32E Cartridge Assembly is non-serviceable. Do not attempt to dis-
assemble the cartridge or tamper with the factory settings beyond those detailed in this
product manual.
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