Technical Data; Operating Conditions; Sound Pressure Level; Storage - Grundfos Unilift AP12 Installation And Operating Instructions Manual

Fault
4. The pump runs
but gives no
water.

9. Technical data

Enclosure class
IP68.
Insulation class
F (311 °F / 155 °C).

9.1 Operating conditions

Minimum liquid temperature
32 °F (0 °C).
Maximum liquid temperature
122 °F (50 °C) in continuous operation.
Minimum water level
The water level must be above the inlet strainer.
Maximum installation depth
30 ft (10 m) below liquid level.
Maximum starts per hour
20 starts, evenly distributed once every 3 minutes.
pH value
Between 4 and 10.
Maximum particle size
Pump type Max. spherical diameter
Unilift AP12 0.47 in. (12 mm)
Unilift AP35 1.38 in. (35 mm)
Unilift AP50 1.97 in. (50 mm)
Density
3
Maximum 68 lbs/ft (1100 kg/m
Viscosity
Maximum 10 cSt (centistoke) (10 mm
14
Cause
a) The pump is blocked by impurities.
b) The outlet pipe or the non-return
valve is blocked by impurities.
c) The impeller is not properly fixed to
the shaft.
d) Air is trapped in the pump.
e) The liquid level is too low. The inlet
strainer is not completely
submerged in the pumped liquid.
f) The float switch does not move
freely.
3
).
2
/s).
Remedy
Clean the pump.
See section 7.1 Cleaning the
pump.
Clean the outlet pipe or the non-
return valve.
Tighten the impeller.
Vent the pump and the outlet
pipe.
Submerge the pump in the liquid
or adjust the float switch.
Make the float switch move freely.
Operation
The inlet strainer must always be covered by the
pumped liquid. The pump can run continuously.
See the nameplate on the pump for the electrical and
hydraulic performance data.

9.2 Sound pressure level

The sound pressure level of the pump is lower than
the limiting values stated in the EC Council Directive
2006/42/EC relating to machinery.
A-weighted sound pressure level
< 65 dB (A) in accordance with ISO 3743.
For further technical data, see sections
6.2.1 Nameplate and 6.2.2 Type

9.3 Storage

Storage temperature
Not lower than -22 °F (-30 °C).

10. Disposing of the product

This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
key.
Subject to alterations.