rada 425-t3 Product Manual page 32

1. Measure & record supply temperature and
pressures, if possible (See Commissioning).
2. If valve not in recent use exercise thermostat.
(See Commissioning)
3. Measure & record blend temperature & flow rate
@ maximum flow (See Commissioning).
4. Measure & record blend temperature & flow rate
@ minimum flow (see Commissioning).
Has mixed water
temperature changed by
more than 1K?
9. Ensure supply temperatures & pressures and flow
rate at time of test are within valve specification (See
Operating Parameters). Record all these.
10. Isolate CW supply (See Commissioning).
11.Measure & record max & final blend temp. (See
Commissioning).
Is max. Blend temp. >2K
above previous recorded
Is final blend temp.
>2K above set blend temp?
Note! K = Kelvin, the unit of thermodynamic temperature. The unit "Kelvin" is equal
to the unit of "Degree Celsius". Kelvin is used for a difference of Celsius
temperature.
Note! All measurements should be recorded in the Thermoscopic Mixing Valve
Performance Record (Log Book)
Yes
No
Yes
value?
No
Yes
No
In-service Test Procedure
No
5. Check/clean strainers (See
Maintenance Procedure - Inlet
Strainers).
6. Check/replace check valves (See
Maintenance Procedure - Check
valve Cartridges).
7. Check/open isolating valves.
8. Re-set & record blend temp.(See
Commissioning - Maximum
Temperature Setting).
Figure 11
32
Start
Are critical
components due
for replacement?
Yes
12. Replace thermoscopic unit and,
if necessary, other critical parts.
13. Carry out Commissioning procedure
(See Commissioning Checks).
Finish