Pump Location; Installation On Auto-Coupling - Grundfos Unilift AP35B Original Installation And Operating Instructions

4.2 Pump location

The pump can be used in vertical or horizontal posi-
tion, see fig. 3.
During continuous operation, the motor and the
pump inlet must always be completely covered by
the pumped liquid.
Fig. 3 Position of pump
When the pipe/hose has been connected, place the
pump in its operating position.
Note: Do not lift or lower the pump by means of the
electric cable.
Position the pump so that the pump inlet will not be
blocked or partly blocked by sludge, mud or similar
materials.
It is recommended to place the pump on a solid
base, see fig. 4.
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Fig. 4 Place pump on a solid base
In the case of permanent installation, the pit must be
cleared of sludge, pebbles, etc. before the pump is
installed.
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4.3 Installation on auto-coupling

See figs. A and B, pages 182 and 183.
Pumps for permanent installation can be installed on
a stationary auto-coupling and operated completely
or partially submerged in the pumped liquid.
1. Drill mounting holes for guide rail bracket on the
inside of the pit and fasten the guide rail bracket
provisionally with two screws.
2. Place the auto-coupling base unit on the bottom
of the pit. Use a plumb line to establish the cor-
rect positioning. Fasten with heavy-duty expan-
sion bolts. If the bottom of the pit is uneven, the
auto-coupling base unit must be supported so
that it is level when being fastened.
3. Assemble the discharge line in accordance with
the generally accepted procedures and without
exposing the line to distortion or tension.
4. Knock the guide rails on to the spigots of the bot-
tom part of the auto-coupling. Bevel the inside of
the guide rails to facilitate installation. The guide
rails must fit tightly on the spigots. We
recommend ¾" medium size pipes as guide rails.
5. Adapt the length of the guide rails to fit precisely
the bracket at the top.
6. Unscrew the provisionally fastened guide rail
bracket, fit it on top of the guide rails and finally
fasten it firmly to the pit wall.
Note: The guide rails must not have any axial play
as this would cause noise during pump operation.
7. Clean out debris from the pit before lowering the
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pump into the pit.
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8. Fit the auto-coupling half on to the discharge port
of the pump. Then slide the guide bar of this cou-
pling half between the guide rails and lower the
pump into the pit by means of a chain. When the
pump reaches the auto-coupling base unit, the
pump will automatically connect tightly.
9. Hang up the end of the chain on a suitable hook
at the top of the pit.
10. Adjust the length of the motor cable by coiling it
up on a relief fitting, so the cable is not damaged
during operation. Fasten the relief fitting to a suit-
able bracket at the top of the pit. Make sure that
the cables are not sharply bent or pinched.
Note: The end of the cable must not be submerged,
as water may penetrate through the cable into the
motor.
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