Taco 5000-HX Series

TROUBLESHOOTING:
This troubleshooting table is intended as a helpful guide and is not all inclusive. There could be other causes and solutions
for a non-functioning product.
FAULT / SYMPTOM CAUSE POSSIBLE SOLUTION
1. The desired mixed water temperature
cannot be obtained or valve is difficult
to set.
• Inlet temperatures are not within speci-
fication limits.
• Hot and cold supplies are reversed.
• Strainers are blocked.
• Ensure inlet temperatures are within
the specified limits for the valve.
• Refit the valve with Hot/Cold supplies
fitted to the correct connections.
• Clean strainers.
2. Mix temperature unstable or changing
over time.
• Strainers are blocked.
• Fluctuating supply pressures.
• Clean strainers.
• Install pressure regulating valves on
both hot and cold supplies.
3. Either full hot or full cold water flow-
ing from outlet fixture.
• Valve is incorrectly set.
• Hot and cold supplies are reversed.
• Hot/Cold water has migrated to other
inlet.
• Refer also to point 1.
• Adjust mix temperature as required.
• Refit the valve with Hot/Cold supplies
fitted to the correct connections.
• Verify the check valve is not fouled.
Clean if necessary.
4. No flow from the valve outlet.
• Hot or cold water supply failure.
• Strainers are blocked.
• Restore inlet supplies and check mix
temperature.
• Clean strainers.
5. Flow rate reduced or fluctuating.
• Strainers are blocked.
• Fluctuating supply pressures.
• Clean strainers.
• Install pressure regulating valves.
6. Mixed water temperature does not
change when temperature adjuster is
altered.
• Hot and cold supplies are reversed. • Refit the valve with Hot/Cold supplies
fitted to the correct connections.
7. Hot water flows into the cold water
system or vice versa.
• Check valves fouled. • Clean check valves, ensuring debris is
removed.
8. Valve is noisy.
• Excessive water velocity.
• Valve sized incorrectly.
• Reduce water velocity (best achieved
by fitting a pressure regulating valve).
• Check valve specifications and ensure
the appropriate valve is used for
required flow.
Groove
Counterclockwise
(Increase Temperature)
C
lockwise
(Decrease Temperature)
Figure 1 Figure 2
PRIMARY/SECONDARY INSTALLATION:LOW TEMPERATURE OR RADIANT INSTALLATION: