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.
Pg.2
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.
Pg.3
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
GRP Series
INSTALLATION OF PUMPS WITH RING
STANDS:
The ring stand design allows for simple,
economical installation and can be transported
from one installation to another.
For pump models without integral support feet,
install the ring stand to the underside of the volute
with the supplied fasteners. Apply a thread locking
compound to threads before installing such as Blue
Loctite #242.
Install lifting chain or cable of adequate size
and load rating of the unit. Allow for proper
length to permit proper lowering and raising of
the pump. Properly position power cables and
lifting device over the load and keep from
entering the pump suction.
Prior To Installation:
Before lowering the pump into position check the
direction of rotation. The impeller will rotate
clockwise as viewed from the top. Therefore the
pump will try to move in the counter clockwise
direction as the impeller rotates (known as start
reaction). "Bump the Motor" by closing the pump
circuit breaker and push the pump start button and
look for the direction of movement specified above.
For three phase motors, if the starting jerk is in the
clockwise direction, open the circuit breaker to
isolate power and interchange two of the three
phase leads inside the control panel.
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 is properly positioned in the
guide claw flange. Position pump so the guide ears
on the discharge flange engage the rails. Slowly
lower the pump along the guide rail. Once the
pump reaches its bottom location it will automatically connect to the base.
PUMP MODEL Anchors SIZE TORQUE
Bolts
1 ¼ -2” GRP
THREADED
2” GRP
FLANGED
4 M12mm 37 ft/ #
4 M16x60 108 ft/ #
4 M16mm 74 ft/ #
Installation, Operation & Maintenance Manual
Notes:
1. Flange bolts must be tightened in cross pattern
to avoid damage to the raise face flanges.
2. Standard Flange Bolts are 316SS
3. Standard Anchors are Plated Steel
4. Autocoupling systems include qty 4 M12
anchors for the upper bracket. Torque to 38 ft#.
5.
Anchor bolt holes should be drilled to the actual
diameter of the anchor (M12 anchor requires
12mm diameter hole).
START-UP
Prior To Applying Power
Prior to applying power to the pump; double check
all wiring and verify that the power (Voltage, Phase)
that will be supplied to the unit matches the nameplate specified values. Measure resistance of cable
and pump motor resistance of ground circuit
between control panel and outside of pump.
Perform MEG ohm check of motor insulation.
Record all data on attached start-up checklist
Minimum Submergence
For optimal cooling, motor should be completely
submerged at all times. In pump-down systems,
level should not fall below one discharge diameter
above the top of the volute. For continuous
operation with a VFD, level should not be
maintained below the top of the motor for sustained
periods. For specific inquiries, please contact
factory for assistance.
Wet Well Applications
If the above checks prove satisfactory the pump is
ready for operation. Lower the pump into position.
(Refer to Mechanical installation section of this
manual.) Open discharge valve, and verify that all
check valves operate freely. It is very common for
discharge check valves to be jammed shut (or
open) after sitting for a period of time. Once all
valves are open and free, start the pump and allow
it to stabilize for several minutes prior to recording
any test data. Listen for any unusual noise and be
on the lookout for unusual vibration. This is
generally detectable on guide rails for Auto
Coupling installations and on discharge piping for
ring stand installations. Also for Auto Coupling
installations, look for any blow by from the
discharge connection. Perform all remaining
electrical, operational, and performance tests
specified on the start-up report at the back of this
manual. Record and provide details on the
checklist to validate warranty.
Pg.5
GRP Series
Installation / Startup Troubleshooting:
Only authorized service personnel who are trained
professionals shall troubleshoot and repair pumps
that are experiencing operational or performance
difficulties.
All HOMA pumps are factory tested, yet startup
difficulties can occur with any mechanical
equipment. Please note that our technical
support staff stands ready to assist you with
any problem or difficulty you might encounter
with our equipment.
The following is a tabulation of common startup problems and possible causes.
Symptom
Possible Causes
Pump will not start
1, 2, 3, 4, 27, 29, 31, 32
Little or zero discharge
5, 6, 7, 8, 16, 30, 32
Insufficient discharge flow/pressure
5, 6, 9, 10, 11, 12, 26, 30
Excessive power consumption
6, 9, 13, 28, 30
Excessive current draw
6, 13, 14, 15, 19, 21, 26, 30
Excessive pump vibration/noise
5, 7, 9, 10, 12, 13, 15, 16, 17, 25, 26, 30, 31
Pump runs & motor protection trips
17, 18, 19, 20, 21, 28
Pump runs manually, but not automatically
22, 23, 24
Pump runs hot
7, 13, 18, 19, 25, 26, 28
Listing of Possible Causes:
1. Incorrect or no power supplied to motor.
2. Power cable cut.
3. Short to ground in cable or motor winding.
4. Control panel circuit breaker open.
5. Actual system head is higher than calculated or
specified.
6. Incorrect impeller rotation direction.
7. Sump liquid level is below pump's minimum
submergence requirement.
8. Closed discharge valve or jammed check valve.
9. Wear ring(s) worn. (If Applicable).
10. Vortex at pump's suction.
11. Discharge valve partially closed.
12. Insufficient NPSHA (Dry Pit Application).
13. Actual system head is lower than specified
resulting in over pumping condition.
14. Voltage supply to motor is lower than required
by motor.
15. Damaged bearings.
16. High system head causing pump to operate at
extremely reduced capacity.
17. Object stuck inside impeller.
18. Motor not receiving proper voltage on all three
phases.
19. Phase/currents unbalanced or too high.
20. Insulation between phases and earth
ground,<1M-ohm.
21. Density of the pumping media too high.
22. Defective level sensor.
23. Hand/Off/Auto switch not in Auto Position.
24. Defective H/O/A switch, relay or contactor coil.
25. Air Captured in Cooling Jacket.
26. Pump not properly seated on Auto Coupling.
27. Water intrusion through junction box.
28. Run capacitor size too large.
29. Start capacitor size too small.
30. Profile seal not sealing or missing.
31. VFD or Soft Start not functioning properly.
32. Start Relay or Capacitors damaged. (1 ph)
Please note that some possible causes may not
relate to your particular model.
If you need additional help, please contact
your local distributor or e-mail
service@homapump.com
Pg. 6
Installation, Operation & Maintenance Manual
GRP Series
PREVENTIVE MAINTENANCE
Regular preventive maintenance will help ensure
longer pump life and more reliable operation. It is
recommended that pumps in intermittent operation
be inspected twice a year and pumps in continuous
operation be inspected every 1,000 hours. The
following is a listing of required inspection and
maintenance items.
If any of the problems described in the
following list exists stop operating the pump to
avoid damage or personal injury.
1. CABLE ENTRY
Make sure that the cable entry flange and strain
relief clamp are tight. If the cable entry is showing
signs of leakage remove cable from entry, remove
grommet, cut a piece of cable off so that the
grommet seats on a new portion of the cable,
replace grommet, and reinstall cable assembly, into
the top of the motor.
Note: Explosion Proof cables are sealed with a
Factory Mutual Approved potting compound.
Please consult factory for instruction.
2. CABLES
Inspect the cable for cuts, scrapes or sharp bends.
If the outer jacket is damaged, replace the cable.
Do not attempt splices within wet wells.
3. MOTOR INSULATION RESISTANCE
Megger the insulation between the phases and
between any phase and ground. Resistance
values should be greater than 1 M ohm. If
abnormal readings are obtained contact authorized
service center immediately.
4. EXTERNAL PARTS ON PUMP
Make sure that all screws, bolts and nuts are tight.
Check the condition of pump lifting eyes and
replace if damaged or worn, Replace any external
part that appears worn or damaged.
Installation, Operation & Maintenance Manual
5. SEAL CHAMBER OIL
Caution seal chamber may be
pressurized
Check the condition of the oil to see if any water
leakage has occurred. Lay the pump on its side
with the plug facing upward and remove the oil fill
plug. Drain the oil from the seal chamber into a
transparent container. Check for impurities and
emulsification (Oil is cream-like). If water intrusion
has occurred check lower mechanical seal and
replace if necessary. Refill seal chamber with fresh
oil. Refer to technical details section for type and
quantity of oil.
6. IMPELLER
Periodically inspect impeller by turning pump on its
side, remove suction strainer nuts and strainer to
expose impeller and relocate position of adjusting
plate (suction cover) as needed. Replace the
impeller if it is damaged or severely worn.
7. PROFILE SEAL
When pump is removed for any service, carefully
inspect the profile seal for signs of damage or
improper sealing. Be sure the contact patch is fully
around the seal face.
SPARE PARTS
In order to obtain spare parts identify the required
parts by contacting authorized HOMA PUMP
TECHNOLOGY representative with the parts
required and the pump serial number. Authentic
Homa Pump Technology parts shall be used to
maintain warranty.
Note: Explosion Proof pumps must be identified as
such, and the pump serial number must be
referenced for proper parts identification.
RECOMMENDED TOOLS AND
SUPPLIES
In addition to ordinary, standard tools and lifting
devices, ensure that complete set of metric Allen
wrenches, dead blow hammer, impeller puller,
Loctite 242 (Blue), petroleum jelly and anti- seize
compound are on hand.
Pg.7
GRP Series
PROFILE SEAL INSTALLATION
When installing a profile seal, one side of the seal has a larger diameter ridge on the
outside edge. This side goes to the inside of the guide claw as seen below.
Press the seal into its seat starting on one side and work the rest of the seal into the
same position. When finished, it should look as below.
When properly installed, the profile seal will stay in place when pulled straight outwards.
It is recommended that 3M Weather Stripping be applied to the surface touching the
claw if possible for added adhesion.
REMEMBER:
the larger diameter always goes to the inside.
Installation, Operation & Maintenance Manual
Pg. 8
GRP Series
SEAL PROBE INSTALLATION PROCEDURE
Mechanical Seal Leak Detection probe has been loose to protect from shipping
damage. Please follow this procedure to install the probe.
1) Lay pump on its side with the plug on the seal chamber facing upwards as indicated.
2) Unscrew the plug with the proper wrench, taking care not to damage the sealing surface.
3) Verify that seal chamber oil level is within ¼” of the indicated value. Measurement is from
oil level to the top of hole. See IOM Manual for seal chamber oil volume, if required.
4) Remove the new sealing gasket from package and install it onto the seal probe plug.
5) Install the seal probe with gasket into the opening, taking care not to damage the cable.
Then tighten the seal probe with the proper wrench until snug. Do not overtighten. Once
tight, verify the seal gasket is properly seated and the cable is not pinched or twisted.
NOTE: At installation of the seal probe be careful not to bind the seal probe cord as it is
being installed into the pump.
6) Lift pump into a vertical position and inspect for any leaks.
7) Secure seal probe cable to pump body and power cable with tyraps before installing
pump.
External Seal Probe Connections
Pg. 9
Installation, Operation & Maintenance Manual
GRP Series
Capacitor Sizing Chart
GRP 10 to 21/1 25 µf @ 370V Run Capacitor - 50 µf @ 330V Start Capacitor-PN#:8857005
GRP 26/1 40 µf @ 370V Run Capacitor - 80 µf @ 330V Start Capacitor-PN#:8857010
GRP 28 - 41/1 50 µf @ 370V Run Capacitor - 50 µf @ 330V Start Capacitor-PN#:8857015
GRP 44/1 70 µf @ 330V Run Capacitor - 320 µf @ 330V Start Capacitor-PN#:8857084
GRP 58/1 120 µf @ 370V Run Capacitor - 200 µf @ 330V Start Capacitor-PN#:8857025
GRP 78/1 120 µf @ 370V Run Capacitor - 300 µf @ 330V Start Capacitor-PN#:8857030
GRP 59/1 100 µf @ 370V Run Capacitor - 350 µf @ 330V Start Capacitor-PN#:8857085
GRP 79/1 120 µf @ 370V Run Capacitor - 350 µf @ 330V Start Capacitor-PN#:8857090
7.5 HP and larger motors require multiple run and start capacitors to achieve the necessary
capacitance value. Refer to the capacitor wiring diagram supplied with each capacitor kit.
Single Phase Pump Start-Up Procedure
Run Capacitor sizing can vary depending on the incoming supply voltage provided. HOMA Single Phase
pumps are provided with Start and Run Capacitor(s) sized for 220-230V under load. Frequently, the
available line voltage is considerably different than indicated, and the Run capacitor(s) may need to be
resized to match the available field voltage. The following procedure will allow you to verify proper
operation of your single phase pump, and/or make necessary changes to your capacitors to correct for
your power supply.
After verifying wiring is in accordance with your pump requirements, start pump and record the following
readings from each of the (3) pump cable leads.
Current under load:
U1 _________
Amps
,> U2 __________
Amps
,> Z2 __________
Amps
Should be (highest reading) (middle reading) (lowest reading)
Lead U1 (common) should have the highest current reading. Lead Z2 (start) should have the lowest
reading.
If Z2 current draw is greater than the current draw of either U1 or U2, a smaller size Run capacitor (lower
microfarad rating) is required to correct the condition. Example: If a 60 µf Run capacitor was supplied,
change to a 50 µf Run capacitor and check current readings. Typically, only one step down in capacitor
size is required, but in certain instances 2 steps may be required.
( ) The standard capacitor kit provided includes: ____________µf start capacitor
____________µf run capacitor
( ) Additional run capacitors have been included for use in tuning the pump to match available line
voltages for optimum performance.
___________µf run capacitor
___________µf run capacitor
___________µf run capacitor
This form is provided for your use in optimizing the performance and service life of your single phase
pumps, and is applicable to most Capacitor Start and Run motors. Please contact our Technical Service
Dept. @ (203)-736-8890 with any questions or if you require any additional information or assistance.
Pg.10
Installation, Operation & Maintenance Manual
GRP Series
START-UP REPORT
To validate warranty, please answer the following questions during start-up as completely and as accurately as
possible and mail this form to:
HOMA PUMP TECHNOLOGY INC.
390 BIRMINGHAM BOULEVARD
ANSONIA, CT 06401
ATTN: SERVICE MANAGER
Receipt of completed report will initiate operational warranty.
Reports that are not returned can delay or void warranty.
1.) Pump User's Name: _____________________________________________________________
Site Location: __________________________________________________________________
Site Contract: __________________________________________________________________
Unit Supplied By: _______________________________________________________________
2.) HOMA Pumps Model__________________________________ Serial No._____________________
Voltage____________ Phase_________________ Hertz________________ Horsepower________
Method Used to Check Rotation (viewed from bottom) __________________________________
Does Impeller Turn Freely By Hand: YES________ NO _________
3.) Condition of Equipment: EXCELLENT_____________ GOOD ____________ AVERAGE___________
Condition of Cable Jacket : EXCELLENT___________GOOD ____________ AVERAGE___________
Resistance of Cable and Pump Motor (measured at pump control)
1 Phase: U1 – U2 _________ Ohms; U1 - Z2 ________ Ohms; U2 – Z2 _________ Ohms; T1 – T2 ________Ohms
3 Phase: U - V_____________ Ohms; V - W ____________Ohms; U -W _________Ohms, T1 – T2 ________ Ohms
Resistance of Ground Circuit Between Control Panel and Outside of Pump __________Ohms
MEG Ohm Check of Insulation:
U to Ground _______________ V to Ground _______________ W to Ground____________
4.) Condition of Equipment at Start-Up: Dry __________ Wet _____________ Muddy_________
Was Equipment Stored:_______________ Length of Storage ________________________
Describe Station Layout ___________________________________________________________
5.) Liquid Level Controls: Model_____________________________ Type ______________________
Is Control Installed Away From Turbulence?____________________________________________
Operation Check: ( IF FLOAT SWITCHES SUPPLIED).
Tip lowest float (stop float), all pumps should remain off.
Tip second float (and stop float), one pump comes on.
Tip third float (and stop float), both pumps on (alarm on simplex).
Tip fourth float (and stop float), high level alarm on (omit on simplex).
6.) Electrical Readings:
Single Phase:
Voltage Supply at Panel Line Connection, Pump Off, L1, L2 _______ L1-Ground ______ L2-Ground _________
Voltage Supply at Panel Line Connection, Pump On, L1, L2 ________ L1-Ground _______ L2-Ground ________
Amperage: Load Connection, Pump On, U1________________ U2 _______________ Z2 _________
Resistance Across Thermal Switch leads T1-T2 _______ ohms
Three Phase:
Voltage Supply at Panel Line Connection, Pump Off, L1-L2_________ L2-L3 _______ L3-L1 ______
Voltage Supply at Panel Line Connection, Pump On, L1-L2_________ L2-L3 _______ L3-L1 ______
Amperage Load Connection, Pump On, L1_____________ L2_____________ L3_______________
Resistance Across Thermal Switch leads T1-T2 _______ ohms
Pg. 11
Installation, Operation & Maintenance Manual
GRP Series
7.) Final Check:
Are Thermal Switches properly wired? What Over-temperature Relay is being used? ___________
Is Pump Seated On Discharge Properly? ______________Check For Leaks?_________________
Do Check Valves Operate Properly? __________________________________________________
Flow: Does Station Appear To Operate At Proper Rate ___________________________________
Vibration Level: Measured _____________________ Observed_____________________________
COMMENTS: _____________________________________________________________________
8.) Equipment Difficulties During Start-Up:_________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
9.) I Certify this Report to be accurate.
Authorized Homa Service Representative:
___________________________________________________________ Phone #____________________
(Signature)
DATE_______________________
Pump Station Owner/ Operator
___________________________________________________________ Phone # ____________________
(Signature)
DATE _______________________
Pg. 12
Installation, Operation & Maintenance Manual
GRP Series
GRP Technical Details
The following is offered as a general guide to values and capacities commonly used.
Resistance Readings (ohms) Pump Weight
230V 230V 460V
1 Phase 3 Phase * 3 Phase *
U1 - U2 / U1 - Z2 U-V-W U-V-W
GRP 10 to 21 2.0 6.0 3.0 9.7 65 #
GRP 24/26 1.9 3.6 2.0 7.3 88 #
GRP 28/34/36/41 0.9 2.3 1.4 3.8 100 #
GRP 44 0.6_ ___ 1.6 1.2 3.8 100 #
GRP 58/59 0.5 0.7 0.5 1.6 230 #
GRP 78/79 0.3 0.5 0.5 1.6 239 #
GRP 117/118 N/A 0.3 0.9 248 #
*Values should be as indicated between any 2 power leads.
Note: Resistance values include 30’ cable, and should be within +/- 10% of above value.
Impeller Bolt Torque 12 Ft. #
Impeller to Bottom Plate Clearance .010” or 1/4 turn of adjuster screws
Pump Rotation Right hand (CW) looking down from top of motor. CCW looking at cutter blade.
Seal Probes GRP pumps use a 12mm seal probe. Single wire probes are for non classified areas, and
2 wire probes are for Hazardous areas.
Seal Chamber Oil - White Mineral Oil (Chevron Lubricating Oil FM 32, 46, 68)
Seal Oil Volume Minimum Distance between 2 pumps
GRP 10, 12, 16, 19, 21 0.72L GRP 10, 12, 16, 19, 21 6”
GRP 24, 26, 28, 34, 36, 37, 41 1.0L GRP 24, 26, 28, 34, 36, 37, 41 6”
GRP 58, 78, 117 2.5L GRP 58, 78, 117 8”
GRP 59, 79, 118 1.90L GRP 59, 79, 118 8”
Seal Oil Level
With pump lying on its side and oil port at 12:00, measure from the top of housing with gasket in place, to
the oil level.
GRP 10 to 41 1” from top of housing to oil level
GRP 58/59 to 117/118 1 1/2” from top of housing to oil level
Approx. (Lbs.)
Pg. 13
Installation, Operation & Maintenance Manual
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