Install Instructions

14
English (US)
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
Density
Maximum 68 lbs/ft
3
(1100 kg/m
3
).
Viscosity
Maximum 10 cSt (centistoke) (10 mm
2
/s).
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 key.
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.
Subject to alterations.
4. The pump runs
but gives no
water.
a) The pump is blocked by impurities. Clean the pump.
See section 7.1 Cleaning the
pump.
b) The outlet pipe or the non-return
valve is blocked by impurities.
Clean the outlet pipe or the non-
return valve.
c) The impeller is not properly fixed to
the shaft.
Tighten the impeller.
d) Air is trapped in the pump. Vent the pump and the outlet
pipe.
e) The liquid level is too low. The inlet
strainer is not completely
submerged in the pumped liquid.
Submerge the pump in the liquid
or adjust the float switch.
f) The float switch does not move
freely.
Make the float switch move freely.
Fault Cause Remedy
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)