Xylem GOULDS 2GFK2412H, Инструкция по установке, эксплуатации и обслуживанию

Страница: 22 / 24

Cause Remedy
The density of the
pumped fluid is too
high.
Make sure that the maximum density is
1100 kg/m
3
(9.2 lb/US gal)
• Change the impeller, or
• Change to a more suitable pump
• Contact a sales or authorized service rep-
resentative.
There is a malfunction
in the overload pro-
tection.
Replace the overload protection.
If the problem persists, then contact a sales or authorized service rep-
resentative.
Always state the serial number of the product, see
Product Description
on page 5.
7.6 The pump delivers too little or no water
DANGER: Crush Hazard
Moving parts can entangle or crush. Always disconnect and
lock out power before servicing to prevent unexpected start-
up. Failure to do so could result in death or serious injury.
NOTICE:
Do NOT override the motor protection repeatedly if it has tripped. Do-
ing so may result in equipment damage.
Cause Remedy
The impeller rotates in
the wrong direction.
• If it is a 3-phase pump, then transpose two
phase leads.
• If it is a 1-phase pump, then do the follow-
ing:
Contact a sales or authorized service rep-
resentative.
One or more of the
valves are set in the
wrong positions.
• Reset the valves that are set in the wrong
position.
• Replace the valves, if necessary.
• Check that all valves are correctly installed
according to media flow.
• Check that all valves open correctly.
The impeller is difficult
to rotate by hand.
• Clean the impeller.
• Clean out the sump.
• Check that the impeller is properly trim-
med.
The pipes are ob-
structed.
To ensure a free flow, clean out the pipes.
The pipes and joints
leak.
Find the leaks and seal them.
There are signs of
wear on the impeller,
pump, and casing.
Replace the worn parts.
The liquid level is too
low.
• Check that the level sensor is set correctly.
• Depending on the installation type, add a
means for priming the pump, such as a
foot valve.
If the problem persists, then contact a sales or authorized service rep-
resentative.
Always state the serial number of the product, see
Product Description
on page 5.
8 Technical Reference
8.1 Motor data
Feature Description
Motor type Squirrel-cage induction motor
Frequency 50 Hz or 60 Hz
Supply 1-phase or 3-phase
Starting method Direct on-line
Maximum starts per hour 15 evenly-spaced starts per hour
Code compliance IEC 60034-1
Voltage variation without over-
heating
±10%, if it does not run continuously
at full load
Voltage imbalance tolerance 2%
Stator insulation class F (155°C [311°F])
Motor encapsulation
Motor encapsulation is in accordance with IP68.
Application limits
Data Description
Liquid temperature Maximum 40°C (104°F)
Liquid density 1100 kg/m³ (9.2 lb per US gal) maximum
pH of the pumped me-
dia (liquid)
5.5–14 for cast iron pumps
Depth of immersion Maximum 20 m (65 ft)
Other For the specific weight, current, voltage, pow-
er ratings, and speed of the pump, see the
data plate of the pump.
8 Technical Reference
1310 Installation, Operation, and Maintenance Manual 19