Homa AM***-C, Instruction Manual

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58 | EngliSH
The HOMA Auto-Coupling kit consists of a base, guide
claw flange, upper guide rail bracket, profile seal and base
anchor bolts. Refer to dimensional drawing for details.
For all pumps, attach the guide claw flange to the pump
discharge flange with the fasteners and gaskets included
with the auto-coupling kit. Use tightening torque’s indicat-
ed in the table below. Do not over tighten! Install the pro-
file gasket (if not already installed at the factory) into the
guide claw with the large diameter fitted into the groove
inside the claw. Refer to the diagram included with the
auto-coupling kit for proper profile gasket installation.
Install suitable lifting chain of an adequate size and length
to permit proper lowering and raising of the pump.
Properly locate the base and with the anchor bolts fasten
to the floor of the pump station. Make sure when locat-
ing and securing the anchor bolts that the base will align
properly with the access cover at the top elevation of the
station. Place the base in position, and level the base.
If the base is not level, proper sealing of the pump to base
may not occur!
Place the guide rails (supplied by others), cut to length in
to the rings of the base. The rails will be secured at the top
of the pump station with the upper guide bar bracket and
to extend down to the sump floor.
For stations exceeding 10 feet in depth intermediate
guide bar brackets are recommended. One bracket is rec-
ommended for each additional 10 feet of station depth.
Check that the guide system is properly installed in the
vertical orientation by using levels and a plumb line. Fully
tighten all anchors and mounting bolts.
Connect the station riser piping to the outlet flange of the
base.
Before lowering the pump, verify the direction of impeller
rotation (refer to start-up section for procedure).
Make sure to use lifting equipment that has adequate
capacity for the pump that will be handled.
Before installing pump, check to be certain the profile seal
(rubber ring) is properly positioned in the guide claw flange.
Then position pump so the guides on the discharge flange
engage the rails. Slowly lower the pump along the guide
rail. Once the pump reaches its bottom location it will au-
tomatically connect to the base. It is recommended that
the stationary base elbow be visible before lowering the
unit. If this is not possible, ensure all debris is removed
from wet well.
Do not install more than one check valve into any
piping system or problems will occur.
10.7.2. INSTALLATION OF PUMPS WITH RING
STANDS
The ring stand design allows for a free standing, simple
economical installation or to be transportable from one in-
stallation to another. It is intended to operate completely
or partially submerged in the pumping liquid.
Install the ring stand to the underside of the volute with
the supplied fasteners provided. Apply thread locking
compound and tighten the bolts using the torque table
indicated in the table. Do not over tighten! Install suitable
lifting devise of an adequate length to ensure proper low-
ering and raising capabilities. Lower the pump into the
area where it is required. Properly position power cable
and chain so they stay above pump and cannot enter the
pump suction.
10.7.3. INSTALLATION OF PUMPS FOR DRY PIT AP-
PLICATIONS
Foundation and Piping Requirements:
General
The following recommendations are basic guidelines
which are intended to outline basic requirements in the
design of the dry pit station. It is essential that a licensed
professional engineer be retained by the owner to design
the station and all support structures.
Foundations
Foundations may consist of any structure heavy enough
to provide permanent rigid support for the pump and inlet
elbow stand. Concrete foundations built up from the solid
ground are the most commonly used. The concrete floor
shall be level. The space required by the inlet stand and
the location of the foundation anchor bolts are shown on
the outline dimension drawing. Foundation bolts are to be
embedded in the concrete.
Suction Piping
Suction piping should be at least as large as the pump
inlet elbow suction. If reducers are utilized they should be
of the conical type. If the liquid source level is below the
volute horizontal centerline, the reducer must be eccen-
tric and installed with the level side up. If the liquid level is
above the pump volute horizontal centerline, either eccen-
tric or concentric reducers may be used. Suction piping
should be run as straight as possible. All pipe flange joints
should be gasketed to prevent air from entering the pipe.
High points that may collect vapor are to be avoided. Iso-
lation valves such as gate valves can be installed in order
to facilitate the removal of the pump for maintenance. Any
valve installed in the suction line should be installed with
the stems horizontal.
Discharge Piping
A check valve and isolation valve shall be installed in the
discharge line. The check valve should be installed be-
tween the pump discharge flange and the isolation valve.
If pipe increasers are used on the discharge line, they
should be placed between the check valve and the pump.
The inlet elbow stand allows the pump to be installed in
a stationary position in a dry pit. Place the inlet stand in
position and tighten the anchor nuts. Lower the pump on
to the top flange of the inlet stand.
Do not allow slack on
the lifting cable until the pump is bolted down.