Installation On Auto Coupling - Grundfos UNILIFT APG Installation And Operating Instructions Manual

5.4 Installation on auto coupling

See the appendix for drawing of auto-coupling
dimensions.
Pumps for permanent installation can be mounted on
a stationary auto-coupling guide-rail system or a
hookup auto-coupling system.
Both auto-coupling systems facilitate maintenance
and service as the pump can easily be lifted out of the
pit.
DANGER
Toxic material
Death or serious personal injury
‐
Before installation, make sure that the
atmosphere in the pit is not toxic or in
lack of oxygen.
Use loose flanges to ease the installation and to
avoid pipe tension at flanges and bolts.
Make sure that the pipes are installed with-
out undue force. No loads from the weight
of the pipes must be carried by the pump.
Do not use elastic elements or bellows in
the pipes. Never use these elements to
align the pipes.
5.4.1 Installing an auto-coupling guide-rail system
Proceed as follows:
1. Drill mounting holes for the guide-rail bracket on
the inside of the pit, and fasten the guide-rail
bracket provisionally with two anchor bolts.
2. Place the auto-coupling base unit on the bottom
of the pit. Use a plumb line to establish the correct
positioning. Fasten the auto coupling with heavy-
duty anchor bolts. If the bottom of the pit is
uneven, the auto-coupling base unit must be
supported.
3. Connect the outlet pipe in accordance with the
generally accepted procedures. Avoid exposing
the pipe to distortion or tension.
4. Place the guide rails in the auto-coupling base
unit, and adjust the length of the rails accurately to
the guide-rail bracket at the top of the pit.
5. Unscrew the fastened guide-rail bracket, fit it on
top of the guide rails and finally fasten it firmly to
the pit wall.
The guide rails must not have any axial
play as this may cause noise during
pump operation.
6. Clean out debris from the pit before lowering the
pump into the pit.
10
7. Fit the guide claw to the pump outlet. Grease the
gasket of the guide claw before lowering the pump
into the pit.
8. Mount the lifting shackle and the lifting chain to
the handle of the pump on the opposite side of the
auto coupling.
Attachment of chain to pump handle.
9. Slide the guide claw between the guide rails and
lower the pump into the pit by the chain. When the
pump reaches the auto-coupling base unit, the
pump will automatically connect tightly. When the
pump has reached the auto-coupling base unit,
shake the pump by the chain to make sure that it
is placed in the correct position.
10. Hang up the end of the chain on a suitable hook
at the top of the pit so the chain cannot touch the
pump housing.
11. Adjust the length of the power cable by coiling it
up on a relief fitting to ensure that the cable is not
damaged during operation. Fasten the relief fitting
to a suitable hook at the top of the pit. Make sure
that the cable is not sharply bent or pinched.
12. Connect the power cable and the control cable, if
any.
The free end of the cable must not be sub-
merged as water may penetrate through
the cable into the motor.