Troubleshooting
Under normal operating conditions the Caleffi 5213 series thermostatic mixing valve will provide a
very high level of performance. However, in some circumstances, when the included maintenance
plan is not properly performed, the following problems may arise.
14
Sympton
Cause
Corrective action
Hot water at the cold faucets a) Inserted check
operation failed.
b) Check valves not
installed.
Replace faulty check valves.
Fluctuating mixed water
temperature
a) Erratic supply tem-
peratures at the valve
inlets.
b) Starvation of the
water supplies at the
valve inlets.
c) Incorrect commis-
sioning of the valve.
Restore inlet conditions within the
limits of the valve.
Erratic flow of water from
the valve
a) Insufficient water
supplies.
b) Fluctuations in
supply pressure and/
or temperatures.
c) Adverse effect cre-
ated by other draw-off
points on the sytem.
Stabilize inlet supply conditions.
No water flowing from the
valve
a) In-line filters
blocked.
b) Insufficient supply
pressures.
c) Debris obstructing
valve operation.
a) Clean filters.
b) Restore inlet supplies.
c) Clean debris or scale from valve
internals.
Valve does not shutoff when
tested
a) Installation not in
accordance with this
instruction manual.
b) Minimum tempe-
rature differentail not
achieved.
c) Internal mechanism
impaired by debris.
a) Install as outlined in these instruc-
tions.
b) Raise hot water temperature.
c) Clean debris or scal from valve.
