Pentair HYDROMATIC HPGB750 Manual

NOTE! To the installer: Please make sure you provide this manual to the owner of the equipment or to the responsible
party who maintains the system.
SUBMERSIBLE
GRINDER PUMPS
INSTALLATION AND SERVICE MANUAL
Item # E-03-617 | Part # 23833A617 | © 2018 Pentair plc | 05/18/18
For use in hazardous locations with FM approved Class I, Division 1, Groups C & D.
MODEL HPGB750/1000/1500 and
HPGBX750/1000/1500

2
CAUTION: Read these safety
warnings first before installing,
servicing, or operating any pump.
Only qualified persons shall conduct
services and installations of this
pump. The pump must be wired
by a qualified electrician, using an
approved starter box and switching
device.
CALIFORNIA PROPOSITION
65WARNING:
This product and
related accessories contain
chemicals known to the State of
California to cause cancer, birth
defects or other reproductiveharm.
General:
1. Most accidents can be avoided by
using COMMON SENSE.
2. Read the operation and
maintenance instruction
manual supplied with the pump.
3. Do not wear loose clothing that
can become entangled in the
impeller or other moving parts.
4. This pump is designed to handle
materials that could cause
illness or disease through
directexposure.
Wear adequate protective clothing
when working on the pump
or piping.
Electrical:
5. To reduce the risk of electrical
shock, pump must be properly
grounded in accordance with the
National Electric Code and all
applicable state and local codes
and ordinances.
6. To reduce risk of electrical shock,
disconnect the pump from the
power source before handling
orservicing.
7. Any wiring to be done on
pumps should be done by a
qualifiedelectrician.
8. Never operate a pump with a
power cord that has frayed or
brittle insulation.
9. Only pumps labeled for use in
hazardous location may be used
in hazardous locations. These
motors must be repaired and
serviced at the Hydromatic
factory. Any unauthorized field
repair voids both warranty and the
FM hazardous location listing.
10. Never let cords or plugs lie
inwater.
11. Never handle connected power
cords with wet hands.
Pumps:
12. Pump builds up heat and pressure
during operation; allow time for
pump to cool before handling
or servicing.
13. Only qualified personnel should
install, operate or repair pump.
14. Keep clear of suction and
discharge openings. DO NOT
insert fingers in pump with
powerconnected.
15. Do not pump hazardous material
not recommended for pump
(flammable, caustic, etc.)
16. Make sure lifting handles are
securely fastened each time
beforelifting.
17. Do not lift pump by the
powercord.
 18. Donotexceedmanufacturer’s
recommendationformaximum
performance, as this could cause
the motor to overheat.
19. Secure the pump in its operating
position so it cannot tip over, fall
orslide.
20. Keep hands and feet away
from impeller when power is
connected.
21. Submersible grinder pumps are
not approved for use in swimming
pools, recreational water
installations, decorative fountains
or any installation where human
contact with the pumped fluid
iscommon.
22. Do not operate pump without
safety devices in place.
IMPORTANT: Hydromatic®is not
responsible for losses, injury or death
resulting from a failure to observe
these safety precautions, misuse or
abuse of pumps orequipment.
Motor HP and Voltages:
These submersible grinder pumps are
offered in three phase, 7-1/2, 10 and
15 HP. Voltages will vary according
to the application. Three phase
stators are available with dual voltage
configurations that will allow either
230Vor460Vinternalconnection.
Electrical Controls:
All of these pump models must be
used with a control panel. Hydromatic
built control panels are designed to
supply the correct electrical controls,
motor starting equipment and include
the circuitry for moisture and heat
sensors. It is recommended that a
Hydromatic built control panel be used
so that all warranties apply.
General Construction:
The motor chamber and seal chamber
are filled with a high dielectric type
oil for improved lubrication and heat
transfer of the bearings and motor.
Since the bearings have been designed
for 50,000 hours of life, the oil should
never require replacement under
normal operating conditions. An air
space above the oil level in both the
seal and motor chambers is provided
toallowfortheexpansionoftheoil
when at operating temperature. The
power and control lines are sealed
and strain relieved on the outside
entrance with a standard cord grip,
and internally through the use of a
dielectric potting resin surrounding
the electrical wires. All of the pump
fasteners and shafts are made from
corrosion resistant stainless steel,
while the pump castings are made of
ASTM A-48 Class 30 cast iron, and the
multi-vanevorteximpellersaremade
from ductile iron.
General Information

3
General Installation:
Various configurations and methods of
plumbing this series of solids handling
pumps may be used; however, for
ease of installation and service a
Hydromatic rail lift-out system is
recommended.
Motor:
Each motor is provided with heat
sensor thermostats attached
directly to the motor windings.
The thermostats open if the motor
windingsseeexcessiveheatand,in
turn, open the motor contactor in the
control panel, breaking the power to
the pump.
When the motor is stopped due to an
overheat condition, it will not start
until the motor has cooled and the heat
sensor reset button is manually pushed
on the front of the Hydromatic control
panel. This circuitry is provided in the
Hydromatic control panel designs.
The pumps are equipped with internal
thermostats to meet Class H heat rise
of 356°F (180°C).
Motor Seal Failure Warning:
The seal chamber is oil filled and
provided with moisture sensing probes
to detect water leakage through the
lower shaft seal. The probes can also
detect moisture present in the upper
motor housing.
The presence of water energizes a red
seal leak warning light at the control
panel. This is a warning light only, and
does not stop the motor. It indicates a
leak has occurred and the pump must
be repaired. Normally, this indicates
the outboard seal has leaked. Allowing
the unit to operate after the warning
may cause upper seal leakage along
withmotorfailure.
The resistance across the moisture
sensing (seal failure) probes should
be checked after a seal leak warning
light has lit. This can be done by
disconnecting the red and orange
control wires from the control panel
and measuring the resistance with
an ohmmeter between the wires.
If the measured values are below
specification, the pump may have a
lowersealfailureandrequireservice.
Motor Power Cord, Control Cord and
Cord Cap Assembly:
Each motor power cord has four
conductors: white, black, red and
green. For a three phase motor the
red, black and white conductors
connect to the three line leads, and the
green is connected to a good ground.
Interchanging any two line leads will
reversetherotationofthemotor.
NOTE: Rotation should be clockwise
when observed from the top of
the pump. This can be checked by
noting which direction the pump
torques upon initial starting. A
properly rotating pump will torque
counterclockwise uponstart.
The control cable has five conductors:
black, white, red, orange and green.
White and black connect to the heat
sensor terminals in the control panels;
red and orange connect to the seal
failure terminals in the control panel;
and the green connects to the ground
inthecontrolpanel.
Thecordcapisepoxypotted.The
cord cap provides for a sealed wire
connection with terminals so that
connections can be made without
breaking the motor seal. This allows
the cord cap, with cords, to be
removed from the motor.
NOTE: Each cable has a green ground
wire and must be properly grounded
per the National Electric Code and
local codes.
Electrical Motor Controls:
All electrical controls and motor
starting equipment should be as
specified in these instructions. Consult
factoryforanyacceptablealternatives.
Level Sensing Controls:
Intrinsically safe type float controls
are recommended for all applications.
An intrinsically safe control panel relay
will limit the current and voltage to the
levelcontrols.
The float level controls maintain the
basin sewage water level by controlling
pump turn-on and turn-off levels.
1. The lower turn-off control should
be set so that the pump stops
with the water covering the
entire motor housing. Consult the
factory for any settings below this
point.
2. The upper turn-on control should
be set above the lower turn-off
control.Theexactheightbetween
the two controls is determined
by the number of pump starts
desired and the depth of the
basin.Amaximumof10startsper
hourshouldnotbeexceeded.
3. The override control is set at a
specified height above the upper
turn-on control.
4. The alarm control is set about 6"
to 12" above the override control.
5. No control should be set above
the inlet invert.
Electrical Connections:
All electrical wiring must be in
accordance with local code and only
qualified electricians should make
the installations. All wires should
be checked for shorts to ground
with an ohmmeter or megger after
the connections are made. This is
important, as one grounded wire can
cause failure of the pump, control
panelorcausepersonalinjury.
Caution: The 230 volt 3 phase pump
has a dual marked nameplate. Voltage
may be rewired by the manufacturer
or a Class I Div 1 equipment qualified
electrician. Once the voltage is
changed, the factory cord tag
indicating 230 volt 3 phase must be
removed.
For record keeping purposes, we sug-
gestthepumpbemarkedexternally
withthenewvoltageandqualied
personnel that performed the change.
Pumps shipped from the factory as 460
volt 3 phase cannot be
rewired to any other voltage.

4
To Re-wire the pump from 230V to
460V 3 phase: Only a 230V pump from
the factory is considered dual voltage,
a cord label clearly states the factory
wound voltage.
Remove bolts securing cord assembly
then raise the cord cap assembly
enough to slip a prying instrument on
opposite sides between the cord cap
castingandthejunctionbox.Take
care to not damage the o-ring or the
machined surfaces of the castings.
Doing so could void FM agency
certications.Whilepryingevenly
on both sides; separate the cord cap
casting from the motor housing, the
assembly is airtight and will have a
vacuum effect when disassembling.
Once separated, the cord cap can be
inverted and rotated to the outside of
the pump assembly, and a bolt can be
re-used to secure the upside down
cord cap to the motor housing for ease
of rewiring.
Refer to the wiring diagram within
this manual for wiring details. Once
allelectricalconnectionsarenished
and secure (a crimped electrical
connector is best to prevent issues
due to vibration if required), the cord
cap should be re-attached reversing
the steps above. Ensure the o-ring is
in place and perform a hi-pot test for
safety once ever thing is complete.
Pump:
The fluid end of the pump is field
serviceable and can be disassembled
in case of wear, damage, plugging or
outboard seal failure.
Checking For Moisture in Motor
Use ohmmeter or a megger and set
on highest scale. Readings on the
large power cord between any of
the conductors red, black, or white
to green conductor or to the motor
housing should be greater than
1,000,000 ohms (1 megohm). Service
work should be done only
at an authorized service station.
Readings should be taken with
line leads disconnected from the
controlpanel.
Resistance of Windings
Everymotorwindinghasafixed
resistance and winding must check
close to specification values.
Verification of the proper wiring of
a dual voltage motor can also be
checked by measuring the motor
winding resistance.
Troubles listed are generally caused
by the pump. Other trouble can occur
fromfaultycontrolboxoperation.
Pump runs but does not pump liquid
from basin.
1. Pump impeller may be air locked;
this occasionally occurs on a new
installation. Start and stop pump
several times to purge air.
2. Run additional water into basin
so that pump will be submerged
deeper to clear air.
3. If pump is three phase, rotation
may be wrong. See instructions
for checking proper rotation.
4. If air does not clear it may be
necessary to lift pump out of
sealing elbow and start motor
to allow pump to pump for a
fewseconds.
Air vent hole is provided in pump
case, so some water will flow from
this hole when pump is operating.
If vent hole gets clogged, clean
out.
5. If pump has been installed for
some time and does not pump, it
may be clogged at grinder inlet.
6. Discharge gate valve may
beclosed.
7. Discharge check valve may be
cloggedorhaveabrokenclapper.
8. Discharge head may be too high.
Check elevation.
9. If above checks do not locate
trouble, motor rotor may be loose
on shaft which allows motor to run
but will not turn impeller or only at
low RPM.
Red light comes on at control box.
1. This indicates some water has
leaked past the lower seal and
has entered the seal chamber
and made contact with the
electrode probe. Pump must be
removed immediately from basin
for replacement of lower seal.
This preventive repair will save an
expensivemotor.
Overload trips at control box and
alarm buzzer or flashing red light
comes on due to high water level
inbasin.
1. Push in on red reset button to
reset overload. If overload trips
again after short run, pump
has some damage and must be
removedfrombasinforchecking.
2. Trouble may be from clogged
grinder causing motor to overload
orcouldbefromfailedmotor.
3. Trouble may be from faulty
componentincontrolbox.
Alwayscheckcontrolboxbefore
removingpump.
Yellow run light stays on
continuously.
1. Indicates H-O-A switch may be in
the Hand position.
2. Level control switch may have
failed causing pump to continue
to operate when water is below
lower weight, or lower weight may
have dropped off.
3. Grinder assembly may be partially
clogged causing pump to operate
atveryreducedcapacity.
4. Gate valve or check valve may be
cloggedcausinglowpumpflow.
5. Pump may be air logged.
Pump
Troubleshooting
Trouble Checklist

5
Circuit breaker trips.
1. Reset breaker by pushing
completely down on handle then
back to On position. If breaker
trips again in a few seconds it
indicatesexcessiveloadprobably
caused by a short in the motor or
controlbox.Checkinstructions
givenwithcontrolboxbefore
pulling pump.
2. If this condition happens after an
electrical storm, motor or control
boxmaybedamagedbylightning.
3. Resistance reading of the motor
with lead wires disconnected
fromthecontrolboxcan
determine if trouble is in motor or
controlbox.
Pump is noisy and pump rate
is low.
1. Grinder assembly may be partially
clogged with some foreign
objectscausingnoiseand
overloadonthemotor.
2. Grinder impeller may be rubbing
on grinder ring due to bent shaft
ormisalignment.
Grease and solids have accumulated
around pump and will not pump out of
basin.
1. Lower weight of level switch may
be set too high.
Set bottom of lower weight
even with bottom of inlet flange
togrinder.
2. Run pump on hand operation
for several minutes with small
amount of water running into
basin to clean out solids and
grease. This allows pump to break
suction and surge which will
break up the solids. If level switch
lower weight is set properly this
condition generally will not occur.
3. Trash may have accumulated
around lower weight causing
pump to turn off too soon. Clean
trash from weight and suspension
cable.
WHITE W/BLACK STRIP - P1
BLUE - P2
ORANGE - SEAL PROBE
SENSOR LEADS
208 - 230V SINGLE PHASE
T4 T5 T8
BLACK
L2
WHITE
L1 RED L3 P1 (PURPLE)
P2 (BROWN)
MOTOR LEADS
230V (DUAL VOLTAGE) THREE PHASE
P1 (PURPLE)
P2 (BROWN)
T7 T8 T9
T1 T2 T3
T4 T5 T6
BLACK
L2
WHITE
L1 RED L3
200V AND 575V THREE PHASE
T1 T2 T3
BLACK
L2
WHITE
L1 RED L3 P1 (PURPLE)
P2 (BROWN)
460V (DUAL VOLTAGE) THREE PHASE
PL (PURPLE)
P2 (BROWN)
T7 T8 T9
T1 T2 T3
T4 T5 T6
BLACK
L2
WHITE
L1 RED L3

6
Ref.
No.
Part
No.
Part
Description Qty.
1RTF 35' Cord assembly 1
2 05876A119 O-ring 1
3 19103A045 HHCS1/2"-13UNCx
1-3/4" 4
4 22873C000 Upper bearing cap 1
5 191331A007 Load spring 2
6 08565A032 Ball bearing, upper 1
7 see ch art Rotor/shaft assembly 1
8 22874D000 Motor housing 1
9 see chart Stator 1
10 08565A026 Ball bearing, lower 1
11 19103A048 HHCS1/2"-13UNCx
2-1/2" 4
12 05876A121 O-ring 2
13 22882D010 Seal housing, upper 1
14 22883A000 Shaft seal 2
15 12558A017 Retaining ring 1
16 19103A043 HHCS1/2"-13UNCx
1-1/2" 8
17 25991D010 Seal housing, lower 1
18 05231A084 Gasket 1
19 see chart Impeller 1
20 27099A000 Impeller washer 1
21 27095E000 Volute 1
22 22587C000 Shredder ring clamp 1
23 22586B010 Shredder ring 1
24 22584C000 Grinder impeller 1
25 22585A000 Impeller retainer 1
26 07597A021 Impeller retaining screw 1
27 19101A010 HHCS3/8"-16UNCx1" 1
28 05818A067 Key 1
29 25343A100 Seal leak probe 2
30 05454A025 Machine screw #6 2
31 22578A100 Electrode wire 2
32 05876A120 O-Ring 1
33 07597A017 Machine screw 5/16"-18
UNCx1" 2
34 06107A016 Lock washer 1
35 05030A241 Washer 1
36 05028A002 Machine screw 1/4"-20
UNCx1/2" 1
Catalog
No.
Rotor/Shaft
Assembly
Stator Housing w/
Stator Impeller
HPGB750M3-2 27098D100 141450031 22874D362K 27096D002
HPGB750M4-2 27098D100 141450031 22874D362K
HPGB1000M3-2 27098D100 141450031 22874D363K 27096D001
HPGB1000M4-2 27098D100 141450031 22874D363K
HPGB1500M3-2 27098D100 141460031 22874D377K 27096D000
HPGB1500M4-2 27098D100 141460031 22874D377K
HPGB750/1000/1500 and
HPGBX750/1000/1500 PARTS LIST

7

740 EAST 9TH STREET 490 PINEBUSH ROAD, UNIT #4
ASHLAND, OHIO, USA 44805 CAMBRIDGE, ONTARIO, CANADA N1T 0A5
855-274-8947 800-363-PUMP
WWW.HYDROMATIC.COM
Warranty Rev. 12/13
STANDARD LIMITED WARRANTY
Pentair Hydromatic® warrants its products against defects in material and workmanship for a period of 12 months
from the date of shipment from Pentair Hydromatic or 18 months from the manufacturing date, whichever
occurs first – provided that such products are used in compliance with the requirements of the Pentair Hydromatic
catalog and technical manuals for use in pumping raw sewage, municipal wastewater or similar, abrasive-free,
noncorrosive liquids.
During the warranty period and subject to the conditions set forth, Pentair Hydromatic, at its discretion, will repair
or replace to the original user, the parts that prove defective in materials and workmanship. Pentair Hydromatic
reserves the right to change or improve its products or any portions thereof without being obligated to provide such
a change or improvement for prior sold and/or shipped units.
Start-up reports and electrical schematics may be required to support warranty claims. Submit at the time of start up
through the Pentair Hydromatic website: http://forms.pentairliterature.com/startupform/startupform.asp?type=h.
Warranty is effective only if Pentair Hydromatic authorized control panels are used. All seal fail and heat sensing
devices must be hooked up, functional and monitored or this warranty will be void. Pentair Hydromatic will cover
only the lower seal and labor thereof for all dual seal pumps. Under no circumstance will Pentair Hydromatic be
responsible for the cost of field labor, travel expenses, rented equipment, removal/reinstallation costs or freight
expenses to and from the factory or an authorized Pentair Hydromatic service facility.
This limited warranty will not apply: (a) to defects or malfunctions resulting from failure to properly install, operate or
maintain the unit in accordance with the printed instructions provided; (b) to failures resulting from abuse, accident
or negligence; (c) to normal maintenance services and parts used in connection with such service; (d) to units that
are not installed in accordance with applicable local codes, ordinances and good trade practices; (e) if the unit is
moved from its original installation location; (f) if unit is used for purposes other than for what it is designed and
manufactured; (g) to any unit that has been repaired or altered by anyone other than Pentair Hydromatic or an
authorized Pentair Hydromatic service provider; (h) to any unit that has been repaired using non factory specified/
OEM parts.
Warranty Exclusions: PENTAIR HYDROMATIC MAKES NO EXPRESS OR IMPLIED WARRANTIES THAT EXTEND
BEYOND THE DESCRIPTION ON THE FACE HEREOF. PENTAIR HYDROMATIC SPECIFICALLY DISCLAIMS THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE.
Liability Limitation: IN NO EVENT SHALL PENTAIR HYDROMATIC BE LIABLE OR RESPONSIBLE FOR
CONSEQUENTIAL, INCIDENTAL OR SPECIAL DAMAGES RESULTING FROM OR RELATED IN ANY MANNER TO
ANY PENTAIR HYDROMATIC PRODUCT OR PARTS THEREOF. PERSONAL INJURY AND/OR PROPERTY DAMAGE
MAY RESULT FROM IMPROPER INSTALLATION. PENTAIR HYDROMATIC DISCLAIMS ALL LIABILITY, INCLUDING
LIABILITY UNDER THIS WARRANTY, FOR IMPROPER INSTALLATION. PENTAIR HYDROMATIC RECOMMENDS
INSTALLATION BY PROFESSIONALS.
Some states do not permit some or all of the above warranty limitations or the exclusion or limitation of incidental or
consequential damages and therefore such limitations may not apply to you. No warranties or representations at any
time made by any representatives of Pentair Hydromatic shall vary or expand the provision hereof.