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Electrical connections
Check the motor characteristics (phase, cycles, voltage) to be certain that they are correct for your
power supply; otherwise you may burn out the motor by running it on too high a voltage.
Be sure that only a qualified electrician makes the electrical connections to the pump. With small,
single phase units, the pump motor is commonly controlled directly by the float switch. On three-
phase units, the float switch operates a motor starter, which starts and stops the pump motor.
When a pump with a make-up water valve is used, the pump motor is controlled by a boiler water
level control
Make-up Water Valve: Mechanical, plug mounted valve with stainless steel float. Rated up to 45 PSI
inlet water pressure. At pressures exceeding 45 PSI, a PRV is required on the inlet cold water line.
Be sure that all wiring is well protected from moisture.
Be sure that the motor is connected so that the pump rotates in the correct direction.
Starting and operating
Do not operate the pumps without priming. If the pumps are run dry, even for a very short time, they
may be severely damaged. Be sure to keep the motor dry. WHEN STARTING UP A PUMP, ALWAYS
ROTATE IT BY HAND TO BE SURE IT TURNS FREELY,BEFORE TURNING ON POWER.
Troubleshooting
Motor overheats or burns out, or pump does not deliver enough condensate to boiler or
pump runs continuouslv or almost continuously:
1.
Check the capacity and pressure rating of the pump; it may be too small for the job.
2.
Check the temperature of condensate; the pump may not handle It if it is too hot.
3.
Check the float switch; it may be damaged and jammed in the ''on» position.
4.
Check the lines and valves between the pump and boiler for clogging; check the pump for
clogging.
Pumps starts and stops to frequently:
1.
Check the float switch adjustment; too little travel between «on» and «off» positions.
Pump does not start until after boiler water falls below safe level:
1.
Check the float switch adjustment; too little travel between «on» and «off» positions.
Pump makes excessive noise:
1.
has the pump been damaged by operating without prime or with hot condensate (Above
190°f)?
2.
Is the pump on a substantial foundation? Is a sounddeadening base required?
3.
Is the noise being transmitted through piping? If so. short lengths or hose connected in deli-
very and return tines will usually improve conditions greatly..
Pumps leaks:
1.
Unit may have been disassembled and reassembled improperly.
2.
The rotary seal may be worn or scored or may have been installed improperly.
If worn, has this been caused by abrasive material in lines?
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IOM S-CVC-GV6-015-SP.indd 14
I.O.M - POMPE VERTICAL CENTRIFUGE - CVC
SINCE 1981
2018-02-28 12:05:35
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