Publicité
Les langues disponibles
Les langues disponibles
Liquid Temperature
167ºF (75ºC)
194ºF (90ºC)
230ºF (110ºC)
Installation Troubleshooting Guide
Fault
Excessive pressure passing the thermostatic
Noise from radiator
valve.
The thermostatic valve is jammed or blocked.
The radiator is not
giving off any heat
The heating system is not balanced.
Incorrect discharge direction.
Dirty impeller
Suction port blocked
Pump generates too
Outlet blocked
little (no) output
Isolation valve closed
Dirty strainer
Air in the pump
Pump at lowest/medium speed level
Pump set point is too low
Power supply interrupted
Pump stopped,
no power
Fuse tripped or circuit breaker opened
Thermal switch has actuated
Pump stopped,
power supply
present
Pump does not start
Noises in system,
thermostatic valves/
Pump output too high
pipes
Air in pump
Cavitation sounds
Noisy pump
Resonance noises
Knocking from foreign bodies in the pump/or
on valve
Minimum inlet pressure
1.6 ft (0.5 m)
9.2 ft (2.8 m)
36.1 ft (11.0 m)
Possible Cause
■ Reduce the speed setting. Flow decreases will reduce system pressure and
eliminate the noise.
■ Shut off all other radiators in the system, and set the pump at maximum speed.
■ Once the blockage has been dislodged reopen the radiators and adjust pump to
original speed setting.
■ Re-assess the system. Fit new commissioning valves on all radiators (may be
integrated in the thermostatic valves) to enable an even distribution of the flow.
■ Turn pump 180 degree
■ Open pump and clean impeller
Note: Close isolation valves if present
■ Open pump and clean housing
Note: Close isolation valves if present
■ Clean isolation valves
■ Open isolation valves
■ Clean strainer
■ Switch off pump and open bleed screw to vent
■ Set pump to the next higher speed level
■ Increase set point on the pump or controller
■ Check the power supply. Attach external power control if necessary
■ Repair short-circuited wire. Repair loose contact.
■ Check for the properly rated fuse.
■ Check pump motor and lead
■ Reduce ambient temperature.
■ Clean blocked or slow rotating pumps
■ Open air vent screw and unlock shaft. Clean pump.
■ Increase speed/set point.
■ Replace pump
■ Reduce speed level.
■ Open bypass/valve.
■ Install circuit balancing valves to adjust flow.
■ Check pump selection/system. Adjust pump. Check system /gauges.
■ Replace pump.
■ Open bleed screw and vent pump. Vent and top up system with water.
■ Check expansion tank.
■ Install air separator.
■ Increase inlet pressure.
■ Reduce temperature.
■ Throttle back pump.
■ Reduce speed.
■ Use sound insulation material between the pump and surface to reduce resonance
noise. Install expansion joints. Install fixture to change system's natural frequency.
■ Adjusts pump speed.
■ Replace pump/motor.
■ Clean impeller.
■ Adjust valve pressure. Adjust valve spring.
Turn valve around if installed incorrectly.
■ Replace pump.
Remedy
Publicité
