Rheem Guardian Warm Water Owner's Manual And Installation Instructions page 30

In Service Test
Is
cartridge due for
replacement?
YES
12. Replace cartridge
13. Carry out
commissioning procedure
Valve operating
correctly
MAINTENANCE
NO
5. Check/clean inlet line strainers
6. Check TMV non return valves,
replace if necessary
7. Check all isolation valves are
fully open
8. Re-set TMV(S) and record
blend temperature
YES
YES
NO
In-service Test Procedure
1. Measure and record supply temperature and
pressure
2. If valve not in recent use exercise thermostat
(refer to commissioning instructions)
3. Measure and record blend temperature &
flow rate at maximum flow
4. Measure and record blend temperature and
flow rate at minimum flow
Has
mixed water
YES temperature changed
by more than
1K?
NO
9. Ensure supply temperatures and pressures
and flow rate at the time of test are within
specification (refer to Guardian Owners Guide
and Installation Instructions)
10. Isolate cold water supply
11. Measure and record maximum and final
blend temperature
Is
max blend temp
> than 2K above
previous recorded
value?
NO
Is
final blend temp
>than 2K above set
blend temp?
30