Homa TP 28 Originalbetriebsanleitung Seite 56

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 ex-
ceeding 10 feet in depth intermediate guide bar brackets
are recommended. One bracket is recommended 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.
56 | EngliSH
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.
Make sure the flange bolt holes align with the mounting
holes on the underside of the volute. Secure the pump to
the mounting flange with the fasteners that are specified
in the accessory fastener selection table below.
Pump model Bolts
Anchors
3" Autocoupling 8
4
4" Autocoupling 8
4
3" & 4" Ring stand 4
3" & 4" Dry sump 8
4
6" Autocoupling 8
4
6" Ring stand 4
6" Dry sump (1 Piece) 8
4
6" Dry sump 8
(N/PMotor) 4
6" Dry sump (F Motor) 8
4
8" Autocoupling 8
4
8" Ring stand 4
8" Dry sump (2 Piece) 8
4
Size Torque
M16X60mm 146 Nm / 108 ft lb
M16 100 Nm / 74 ft lb
M16X60mm 146 Nm / 108 ft lb
M16 100 Nm / 74 ft lb
M16x25mm 146 Nm / 108 ft lb
M16x40mm 146 Nm / 108 ft lb
M16 100 Nm / 74 ft lb
M20x70mm 200 Nm / 150 ft lb
M16 100 Nm / 74 ft lb
M20x40mm 200 Nm / 150 ft lb
M20x45mm 200 Nm / 150 ft lb
M16 100 Nm / 74 ft lb
M20x65mm 200 Nm / 150 ft lb
M16 100 Nm / 74 ft lb
M20x70mm 200 Nm / 150 ft lb
M16 100 Nm / 74 ft lb
M20x70mm 200 Nm / 150 ft lb
M20 200 Nm / 150 ft lb
M20x30mm 200 Nm / 150 ft lb
M20x75mm 200 Nm / 150 ft lb
M20 200 Nm / 150 ft lb