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TYPE 3 VALVES MAINTENANCE
Planned maintenance for Type 3 valves should include the ‘in service tests’ procedure detailed below as
well as the procedure detailed in the general ‘maintenance’ section.
The thermostatic cartridge does not contain any serviceable parts. Therefore, if it malfunctions a full
replacement of the cartridge is required.
IN-SERVICE TESTS
General
The in service tests are meant to monitor and record the continuing satisfactory performance of the
thermostatic mixing valve.
Procedure
1. Carry out step 4 (a) to (c) in the ‘Commissioning’ section. Make sure you are using the same equipment
or equivalent.
2. If the temperature has changed significantly from the last test results follow the next steps:
a. Record the change
b. Check if the filters are clogged and clean them accordingly (refer to section ‘Maintenance, filter
cleaning instructions’)
c. Check that the check valves located in the flexible hoses are in good working conditions.
Replace the flexible hose\s if necessary.
d. If the mixed water temperature still differs significantly, re adjust the mixed water temperature
(refer to section ‘Adjusting the mixed water temperature’).
3. If the temperature has not changed significantly, complete the procedure [Commissioning, step 4
(d) to (f)]
4. Pay attention to the final mixed water temperature recorded in Commissioning, Step 4 (e). If it
exceeds the maximum mixed water temperature stated in the ‘Maximum stabilized temperatures
recorded during site tests’, or if it exceeds the temperature of the last test by more than 2C˚ proceed
to the ‘troubleshooting’ section.
TYPE 3 VALVES INFORMATION
MAXIMUM STABILIZED TEMPERATURES RECORDED DURING SITE TESTS
APPLICATION
MIXED WATER TEMPERATURE C
˚
Washbasin
43 C
˚
max.
