HOMA GRP Series User Manual
GRP Series
Installation, Operation
& Maintenance Manual
Project: _________________________
Installation: ___________________
Pump Model: ____________ Serial Number: ___________
PN# GRPIOM REV. 6/12
HOMA Pump Technology, Inc.
390 Birmingham Boulevard Ansonia, CT 06401
GRP Series
GENERAL INSTRUCTIONS:
This manual is intended to provide basic installation
and start-up guidance. It is to be read and
thoroughly studied prior to attempting to install or
operate any of the equipment supplied. Equipment
damage, which occurs by not following these
instructions will void the warranty.
SAFETY PRECAUTIONS:
Only trained qualified personnel shall be utilized for
installation and start-up.
The following is a general list of safety precautions
that should be followed when installing, starting-up
or servicing the pump. The pump station owner
or operator is ultimately responsible for
ensuring that all equipment is installed, started
up and operated in a safe manner.
• Do not work alone.
• Double check to make sure that all lifting
equipment is in good working order and that it
has adequate lifting capacity for the weight that
it will handle.
• Wear safety helmet, goggles and protective
shoes, or appropriate safety materials required.
• Before working on the pump make sure that
power is disconnected and cannot be energized
by others. Lockout and tag the control panel
circuit breaker.
• Do not stand under suspended loads!
• Never enter or work within a wet well without
first checking to make sure sufficient oxygen is
present and that there are no explosive or
poisonous gases present.
• All personnel, who work with sewage pumping
equipment and systems shall be vaccinated
against diseases that can occur, If there are
any questions or doubts in this area it is
strongly suggested that the local health agency
be contacted.
• For Hazardous Area Classifications, only use
pumps with suitable Explosion Proof Rating.
EQUIPMENT INVENTORY AND
INSPECTION:
Upon arrival of pump shipment carefully unpack all
components and compare with shipping and
purchase order documents to ensure that the order
is complete. Also inspect equipment for any
damage that might have occurred in shipment. If
any problems are detected contact an authorized
HOMA Pump Technology Representative
immediately.
TRANSPORTATION AND STORAGE
PROCEDURE:
Always lift the pump by its lifting bail or eye.
Never lift the pump by its power cable!
Pumps should be stored in an upright position,
taking extreme care to protect the power cable and
control cables from crushing, nicks, or tears which
would permit water intrusion.
Power cable ends must be protected from
immersion in water as well as moisture intrusion.
The cable will wick water into the pump if it is not
protected properly. Power cable leads should be
covered with shrink tubing or suitable sealing
material.
Short Term Storage: Short term storage is
defined as any time less than six months. We
recommend that pump and accessories be stored
in their original shipping container in a dry,
temperature controlled area. If climate controlled
storage is not possible, all exposed parts should be
inspected before storage and all surfaces that have
the paint scratched, damaged or worn should be
re-coated with suitable paint. When possible it is
best to store the pump in an upright position.
Long Term Storage: Any storage time exceeding
six months is considered long term. In addition to
the safeguards specified above, the impeller should
be rotated once a month to prevent the mechanical
seals and bearings from being damaged, and the
pump should be inspected. The oil in the
mechanical seal chamber should be drained and
replaced prior to commissioning.
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Installation, Operation & Maintenance Manual
GRP Series
ELECTRICAL INSTALLATION:
GENERAL GUIDELINES
All electrical work shall be carried out under the
supervision of an authorized, licensed electrician.
The present state adopted edition of the
National Electrical Code as well as all local
codes and regulations shall be complied with.
VERIFICATION OF POWER SUPPLY
Prior to making any electrical connections or
applying power to the pump, compare the power
supply available at the pump station to the data on
the unit's nameplate. Confirm that both voltage and
phase match between pump and control panel.
The voltage supplied at the pump shall be
+5 / -10% of the nameplate value, frequency shall
be + / - 1% of the nameplate value, the voltage
phase balance shall be within 1% and the
maximum corrected power factor shall be 1.0.
POWER LEAD WIRING
HOMA GRP Series pumps may be provided with 1
or more cables, depending on motor horsepower
and operating voltage. Power leads L1, L2, & L3
may be provided as single conductor, or as twin
conductor. Twin conductor configuration may use
leads from two separate cables, or may use two
conductors within one cable. Please refer to
enclosed wiring diagram for specific connection
details. The pump must be connected electrically
through a motor starter with proper circuit breaker
protection in order to validate warranty. Do not
splice cables.
THERMAL SWITCH WIRING :
Pumps are equipped with thermal switches which
are normally closed, automatically resetting
switches. Switches will open when the internal
temperature rises above the design temperature,
and will close when the temperature returns to
normal. Non Explosion proof GRP 10/1 to 21/1
single phase pumps have internally connected
thermals which shut pump down in the event of
over temperature condition, and do not require any
external connection. Explosion proof pumps and
pumps with 7 lead cable have thermal switches
which must be wired into the over temperature
circuit of the control panel.
Note: All sizes of Class 1, Div. 1 pumps for
hazardous service will have externally wired
thermal switches. Thermal switch leads must
be connected to a current regulated control
circuit in accordance with the NEC.
Thermal switch leads must be connected to
validate warranty.
Identify thermal switch leads marked T1 and T3 in
the power or control cable. The resistance across
these leads will be .5 Ohm. These leads must be
connected to the thermal overload relay such as
the HOMA Go switch seal fail / thermal relay
(option) or other current regulated power supply /
controller.
SEAL PROBE WIRING
The mechanical seal leak detector probe utilized in
the pump is a conductive probe which is normally
open. The intrusion of water into the seal chamber
completes the electrical circuit. Control panel
provisions will sense this circuit closure, and will
provide indication or alarm functions depending on
the panel design.
Either single or dual wire systems may be provided.
Single wire systems utilize one energizing
conductor, and the pump casing and neutral lead
as the ground or return portion of the circuit. The
dual wire systems utilize two separate conductors
for each leg of the circuit.
With either system, the seal probe leads must be
wired into a control circuit provided in the control
panel. This control circuit must energize the probe
with a regulated power source, and sense the
closed circuit in event of water intrusion. Indication
and alarm functions must also be provided in the
control circuit. Please see control panel wiring
diagram (by others) for seal probe connection
points. IMPORTANT: For Hazardous Area
Classification Pumps, leak detector circuit must be
in conformance with applicable NEC codes and
regulations.
START / RUN CAPACITORS AND RELAYS:
All single phase motors require start and/or run
capacitors to operate. Refer to the enclosed wiring
schematic. Capacitors and relays must be sized for
the specific motor.
Capacitors are sized based on reference voltage.
The Run capacitor may need to be resized to
match the available field voltage. Each cap kit
shipped is supplied with a wiring diagram and startup procedure.
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Installation, Operation & Maintenance Manual
GRP Series
MECHANICAL INSTALLATION:
PUMPS WITH AUTOCOUPLING SYSTEMS
The HOMA Auto-Coupling is a quick removal
system used to prevent personnel from needing to
enter the wet well.
The HOMA Auto-Coupling kit includes a base
elbow, guide claw flange and upper guide rail
bracket. The kit also includes a profile seal and
base anchor bolts. Refer to “Auto-Coupling Parts
ID” technical page on website.
For GRP 10 - 50 Series
threaded discharge, attach the guide claw flange to
the pump discharge flange as follows:
1. Inspect threaded assemblies for damage.
2. Clean threaded portions of pump discharge
flange and guide claw flange and locate set
screw location.
3. Install profile seal (if not already installed at
factory) into the guide claw with large diameter
fitted into groove inside of claw.
4. Apply pipe sealant to the threads of the
discharge.
5. Thread guide claw flange onto pump discharge
fully. DISCHARGE THREADS ARE NOT NPT.
DO NOT OVER TIGHTEN.
6. Tighten guide claw flange until the claw is in
upright (horizontal) position.
7. Apply thread locker to the set screw included
with the guide claw and tighten set screw.
For GRP 12 and 19 Series
1¼” threaded discharge (note: this assembly can
be ordered with or without integral check valve),
attach the pump discharge flange as follows:
1. Inspect threaded assemblies for damage.
2. Clean threaded portions of pump discharge
flange, nipple and riser pipe.
3. Apply pipe sealant to the male threads.
4. Thread guide claw riser pipe (either style) onto
the pump discharge with the provided 11/4”
close nipple. Tighten the assembly until the
opening in riser pipe points away from pump and
is parallel with the cable entry.
pumps with horizontal 2”
pumps with vertical,
Installation, Operation & Maintenance Manual
5. Bolt the guide claw flange with rubber gasket to
the riser pipe using the SS nuts and bolts provided.
6. Install profile seal (if not already installed at
factory) into the guide claw with large diameter
fitted into groove inside of claw.
7. For check valve version install second gasket,
drop in check ball, and fasten the cover with nuts
and bolts provided.
Important: Do not install more then one (1)
check valve into any pump discharge piping
system or problems will occur.
For GRP 59 to 118 Series pumps
guide claw flange to the pump discharge flange
with the fasteners and gasket included with the
auto-coupling kit. Tighten the bolts to the proper
torque. Install profile seal (if not already installed at
factory) into the guide claw with large diameter
fitted into groove inside of claw.
For all pumps, properly locate the base and, with
suitably sized anchor bolts, fasten it to the floor of
the pump station. Make sure when locating and
securing the anchor bolts that the base will align
properly with the access cover at the top elevation
of the station. Level the base before completely
tightening the anchor bolts. If base is not level,
proper sealing of the pump to base may not occur!
Place the guide rail pipes (supplied by others), cut
to length into the rings of the base. The rails will be
secured at the top of the pump station with the
upper guide bar bracket and will extend down to
the sump floor.
For stations exceeding 10 feet in depth, intermediate guide bar brackets are recommended.
One bracket is recommended for each additional
10 feet of station depth.
Install the upper guide bar bracket to maintain
vertical orientation of the guide rails. Do not
tighten mounting bolts completely at this point.
Check that the guide system is properly installed in
the vertical orientation by using levels and a plumb
line. Then tighten upper guide anchor bolts.
Connect the station riser piping to the outlet flange
of the base.
Pg.4
, attach the
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