Pentair HYDROMATIC HWGX Series User manual

pentair.com
OWNER'S MANUAL
HYD12731 (02-01-2023)
©2023 Pentair. All Rights Reserved.
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2 HP SUBMERSIBLE SEWAGE GRINDER PUMP
HWG(X) MODELS
*Used in Hazardous Locations Class I, Division 1, Groups C & D

HYD12731 (05-15-23)
TABLE OF CONTENTS
SAFETY INFORMATION ...................................................................................................3
INSTALL ATION & OPERATION .............................................................................................4
HWG(X) PUMP PARTS LIST ................................................................................................6
TROUBLESHOOTING......................................................................................................7
MOTOR WIRING DIAGRAMS ................................................................................................9
DIMENSIONS ...........................................................................................................10
WARRANTY ............................................................................................................ 11

3
HYD12731 (05-15-23)
SAFETY INFORMATION
 Wire motor for correct voltage. See
“Electrical” section of this manual and
motor nameplate.
 Ground motor before connecting to
power supply.
 Meet National Electrical Code,
Canadian Electrical Code, and local
codes for all wiring.
 Follow wiring instructions in this
manual when connecting motor to
power lines.
SAFETY SYMBOLS
This is the safety alert symbol. When you see this symbol on
your pump or in this manual, look for one of the following signal
words and be alert to the potential for personal injury:
warns about hazards that will cause serious
personal injury, death or major property damage if ignored.
warns about hazards that can cause serious
personal injury, death or major property damage if ignored.
warns about hazards that will or can cause minor
personal injury or property damage if ignored.
The word NOTE indicates special instructions that are important
but not related to hazards.
Carefully read and follow all safety instructions in this manual
and on pump.
Keep safety labels in good condition. Replace missing or
damaged safety labels.
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.
Hazardous Location Service: HWG(X) 200 pumps are
to be used for handling sewage, wastewater and storm water
only. DO NOT use in other hazardous locations. These motors
must be repaired and serviced only at Hydromatic Authorized
Service Centers
or at the Hydromatic Factory.
Any unauthorized eld repair voids the warranty,
the hazardous location rating, and Factory
Mutual approval.
SAFETY WARNINGS:
RISK OF ELECTRICAL SHOCK. May result in
serious injury or death or fire hazard. Installer must disconnect
all electrical sources prior to installation, handling or servicing.
Only qualified personnel may install this system. NFPA 70/
National Electric Code (NEC) or local codes must be followed.
System must be properly grounded according to NEC. Do not lift
pump by power cord.
BIOHAZARD RISK. Once wastewater source has
been connected to system, biohazard risk exists. Installer(s)
and/or service personnel must use proper personal protective
equipment and follow handling procedures per OSHA 29 CFR
1910.1030 when handling equipment after wastewater source
has been connected to system.
RISK OF ASPHYXIATION. Installer(s) and/
or service personnel must use proper personal protective
equipment and follow OSHA 29 CFR 1910.146 or OSHA 29
CFR 1926. Pump may be installed in a location classified as a
confined space.
RISK OF FIRE OR EXPLOSION. Do not smoke or use
open ames in or around this system. HWG(X) 200 systems are
not intended for use in hazardous locations per NFPA 70 National
Electric Code. Do not pump ammable liquids.
CUTTING RISK. Risk of serious cutting or
amputation exists. Disconnect all power sources prior to
servicing pump or grinding mechanism. Pump may start without
warning. Grinding mechanism is extremely sharp. Use caution
when handling grinder mechanism.
DO NOT modify the cord strain relief. When wiring to a system
control, connect the pump ground lead to the system ground.
DO NOT run the pump dry. Dry running can overheat the pump
(causing burns to anyone handling it) and will void the warranty.
The pump normally runs hot. To avoid burns,
allow it to cool for 30 minutes after shutdown before handling it.
Thank you for purchasing your Hydromatic®pump. To help ensure
years of trouble-free operation, please read the following manual
carefully.
READ THESE SAFETY WARNINGS FIRST BEFORE
INSTALLATION, SERVICING OR OPERATING ANY PUMP. THESE
INSTRUCTIONS ARE WRITTEN WITH THE UNDERSTANDING
THAT THE INDIVIDUALS HAVE EXPERIENCE IN BUILDING WET
WELLS AND INSTALLING BASINS, GRINDER PUMPS AND PUMPING
EQUIPMENT.
NOTE: Models with Third Party approval(s) are clearly marked on
individual pump nameplates.

4HYD12731 (05-15-23)
INSTALLATION & OPERATION
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 uid is
common. This specialized pump is designed to incorporate a
grinding mechanism to remove wastewater particulate and pump
the resulting slurry from a residential structure to a collection
system.
ON THREE PHASE PUMPS ONLY “MOTOR PROTECTION” MUST BE
PROVIDED BY THE INSTALLER. ALL THREE PHASE PUMPS MUST
BE INSTALLED WITH MAGNETIC STARTERS HAVING THREE LEG
OVERLOAD PROTECTION IN ACCORDANCE WITH THE NATIONAL
ELECTRIC CODE. FOR INSTALLATIONS WITH MORE THAN ONE
PUMP, EACH PUMP MOTOR MUST HAVE SEPARATE OVERLOAD
PROTECTION.
PUMPS WITH SEAL LEAK DETECTORS MUST BE CONNECTED TO
THE PROPER CONTROL CIRCUITRY.
Examine all lifting devices, rope or chain for damage before and
after each lift.
DO NOT exceed manufacturers recommendation for maximum
performance, as this could cause the motor to overheat.
Secure the pump in its operating position so it cannot tip over, fall
or slide.
DO NOT pump without safety devices in place.
For hazardous locations, use pumps that are listed and classied
for such locations.
Basin must be vented in accordance with the local plumbing
codes.
MPORTANT: Hydromatic is not responsible for losses, injury or
death resulting from failure to observe these safety precautions,
misuse or abuse of pumps or equipment.
CONTROL PANELS
All Hydromatic control panels used on these grinders are UL listed
and CSA certied. Control panels mounted directly to the basin
used outdoors are UL listed and CSA certied waterproof.
If intrinsically safe controls used in hazardous locations are
required, Hydromatic can furnish a UL listed or CSA certied
panel.
Note: Hydromatic built control panels supply the correct circuitry
for moisture and heat sensor connections. Failure to install the
correct circuitry with proper connection would negate warranty
and Factory Mutual Approval.
LEVEL SENSING CONTROLS
Intrinsically-safe type float controls are recommended for all
applications and required for hazardous location service. An
intrinsically safe control panel relay will limit the current and
voltage to the level controls. A Hydromatic control panel can
be supplied with this type circuitry. The float level controls
maintain the basin sewage water level by controlling pump
turn-on and turn-off level.
1. The lower turn-off control should be set so that the pump
stops at approximately the top of the pump.
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.
JUNCTION BOXES
If a junction box is used in a hazardous location, it must be a
hazardous location approved type with hazardous location cord
connectors. Wires from the junction box must pass through a
hazardous location seal connector.
AIR VENTING
Air tends to trap in the pump volute when water raises in the
sump or when the pump is lowered into water after service. To
vent off this air, a small hole is drilled into the pump volute. Be
sure this vent hole is clean after any service work on pump.
PUMP MODELS: The HWG(X) 200 models are offered in 208 and
230 volt single phase and 208, 230, 460 and 575 three phase.
They are offered in 50 and 60 Hz configurations.
INSTRUCTIONS: Instructions cover only the pump unit.
Separate instructions for the electrical control panel and basin
packaged system are included with these items.
PUMP IS ONLY TO BE DISASSEMBLED AT
Hydromatic FACTORY OR AN AUTHORIZED HYDROMATIC
SERVICE FACILITY.

5
HYD12731 (05-15-23)
INSTALLATION & OPERATION
DESCRIPTION OF PUMP
This pump is intended to grind and pump all normal sewage for
home or commercial use.
Pump is of heavy duty construction and submersible type for
long life when pumping ground sewage. Motor is capacitor start,
capacitor run for single phase. Capacitors and start relay are
mounted in electrical control box.
Pump has two oil-filled chambers: (1) the motor and ball
bearings and (2) the seal chamber - for long life and best heat
transfer.
The lower seal above the pump impeller acts as a buffer for
upper seal that holds oil in the motor chamber. If lower seal
leaks for any reason, water enters the seal chamber. If motor
has the seal leak detector, the electrode will contact the water
and close the circuit to the red seal light in the control panel
indicting motor must be serviced before upper seal fails.
A heat sensor is attached to stator winding to sense any
abnormal heat. If motor temperature for any cause rises above
221ºF the pump is immediately stopped and will not restart until
motor cools to a safe temperature.
PUMP CORDS: Each pump has two cords. The power cord
contains 4 conductors and the control cord has 5 conductors.
The power cord for single phase uses the color coding for start
and main windings and connects to control box terminal strip
black (common), white (run), and red (start). The green wire is
always ground and connects to ground terminal in control box.
For three phase the same 4 conductor color coded cords are
used, the black, white and red can be connected to any of the
three phase terminals in the control box.
The smaller control cord uses black and white leads for heat
sensor and connects to terminal strip in control box. The red
and orange wires connect to seal failure terminals in control
box and the green or ground lead connects to ground terminal in
control box.
After pump is installed NEVER WORK ON MOTOR
OR GRINDER UNIT WITHOUT DISCONNECTING MOTOR LEAD
WIRES FROM CONTROL PANEL. DO NOT RELY ON OPENING
CIRCUIT BREAKER ONLY.
INSTALLING PUMP IN BASIN – Complete installation and piping
instructions are included with the basin package.
THREE PHASE – When pump is installed to operate on three
phase power, pump rotation must be checked. For inside
installation where control box is near the sump basin, pump can
be laid on side to check rotation before installing in sump.
To check rotation turn Hand-Off-Auto switch to OFF position
and turn on circuit breaker. Quickly turn H-O-A switch to HAND
position, then OFF. Note grinder impeller rotation. Impeller
must rotate counterclockwise. If rotation is wrong, change any
two line leads to motor at control box terminal. Recheck for
proper rotation.
KEEP HANDS COMPLETELY AWAY FROM GRINDER
IMPELLER WHEN MAKING THIS CHECK.
Where pump is installed remote from control box in outside
installation a different method is used.
Set the pump in the basin and run in some water so pump can
operate. Turn H-O-A switch to hand position and let pump pull
water down in basin. When water reaches the bottom of pump,
rotation of the water can be observed. Water should rotate in
a clockwise direction if pump rotation is correct. If not correct
rotation, interchange any two line leads to motor at control
panel.
When replacing a pump with a new unit, rotation must be
checked.

6HYD12731 (05-15-23)
HWG(X) PUMP PARTS LIST
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Ref
No. Part No. Description Qty.
1 22407C102 Cord Cap 1
2 19100A029 Cap Screw, 5/16"-18 x 1" Lg. 8
312672A880* Double Lever Nut 4–7
12672A885* Triple Lever Nut 0–4
4 10649A102 Tube, Plastic 2
5 19100A012 Cap Screw, 5/16"-18 x 1-1/4" Lg. 8
6 05876A122* Gasket, Rubber Tetraseal 1
7 21570B100X Cap, Upper Bearing 1
8 05876A123* Gasket, Rubber Tetraseal 1
9 05022A092 Pipe Plug, 1/4" NPT, Hex HD. 2
10 05434A043 Screw, Mach., #10-24 x 1/2" Lg. 1
11 06107A015 Lock Washer, #10 1
12 07597A017 Screw, Mach., Flat Hd. 2
13 21571D100X Housing Motor 1
14 05013A039 Set Screw, 1/4"-20 x 3/8" Lg. 2
15 19331A005* Washer, Spring 2
16 08565A013* Bearing, Ball 1
17 11816A006 Ring Retaining 1
18 21572C100 Rotor, w/Shaft 1ø 1
21572C101 Rotor, w/Shaft 3ø 1
19
21573C104 Stator 208/1ø 1
21573C100 Stator 230/1ø 1
21573C102 Stator 208/230/460/3ø 1
21573C103 Stator 575/3ø 1
20 08565A018* Bearing, Ball 1
21 21574D100X Housing, Upper Seal 1
22 21576A010* Seal, 7/8" Shaft 2
23 12558A006* Ring Retaining 1
24 22578A004A* Electrode 2
25 05876A125* Gasket, Rubber Tetraseal 2
26 22579A000* Ferrule, Rubber 1
27 21577A000* Plug, Special 1
28 21578C100X Housing, Lower Seal 1
29 22581A001* Gasket, Vellumoid 1
30 21580D102P Casing, Volute 1
31 28201C301 Pump Impeller, HWG200/HWGX200 1
28201C305 28201C305 Pump Impeller, *F Series Only 1 1
32 21582B000 Impeller, Grinding 1
33 07597A018* Mach. Screw, 1/4"-20 x 1" Lg. 1
34 21583A000* Retainer, Impeller 1
35 21584B000 Flange w/Shredding Ring, WG20/X 1
36 19099A012 Cap Screw, Hex 1/4"-20 x 1" Lg. 3
Items with * are included in repair kit 25218A003

7
HYD12731 (05-15-23)
TROUBLESHOOTING
CHECK LIST TO DETERMINE MOTOR TROUBLE
CHECKING FOR MOISTURE IN MOTOR:
Use ohmmeter and set on highest scale. Readings on the large
power cord between any of the conductors red, black, white to
green conductor or motor shell should be more than
500,000 ohms.
Both motor housing and stator must be replaced as a unit as
stator is pressed in at the factory and cannot be removed
in the field.
RESISTANCE OF WINDINGS:
Every motor winding has a fixed resistance and winding must
check close to the specification values. This winding resistance
also determines if motor is connected for voltage being used.
Use ohmmeter for this test and set on scale to read
directly in ohms.
WINDING RESISTANCE VALUES IN OHMS (MARATHON)
Motor Type &
Voltage
Black To White
Main Winding
Black To Red
Main Winding
White to
Red
Single Phase, 208V 1.2 4.87 6.07
Single Phase, 230V 1.54 7.60 9.14
Three Phase, 200V 2.79 2.79 2.79
Three Phase, 230V 3.29 3.29 3.29
Three Phase, 460V 13.15 13.15 13.15
Three Phase, 575V 19.68 19.68 19.68
CONDITION PROBABLE CAUSE
Pump runs but does not pump liquid
from basin.
1. Pump impeller may be air locked, this occasionally occurs on a new installation. Remove pump and
clean volute case weep hole and reinstall pump allowing 2 to 3 minutes for air to weep from pump.
2. Remove pump and guides from wet well, and test in 5 gallon bucket after checking weep hole again.
If pump still does not pump, disassemble check valve and check to insure that check valve flapper
has not adhered to sealing face. This condition results from assembled basin units setting in the
sun before installation. NOTE: Check valve bolts should have Loctite 242 or equivalent applied
before reassembly of check valves.
3. If pump will pump water from bucket, try in wet well again. If it still will not pump, the following
problems may exist:
a) Ball Valve – Gate Valve may be in off position.
b) Discharge piping obstructed
c) Valve at street or in main line may be off – redundant check valve in backwards.
d) Tap at force main obstructed – hole not drilled through enough – pipes pushed into
tee too far.
4. If pump has been installed for some time an does not pump, it may be clogged at grinder inlet.
5. Discharge head may be too high. Check elevation. Maximum pump head at zero flow is 105 feet.
6. 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 from basin immediately for
replacement of lower seal. This preventative repair will save an expensive motor.
Overload trips and alarm buzzer or
ashing red light comes on due to high
water level
in basin.
1. Push in 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.
TROUBLE CHECK LIST
Troubles listed below are generally not caused by the pump. Other trouble can occur from faulty control box operation. These will
be listed with the control box instructions.

8HYD12731 (05-15-23)
TROUBLESHOOTING
CONDITION PROBABLE CAUSE
Yellow run light stays on continuously. 1. Indicates H-O-A switch be in the hand position.
2. Level control switch may have failed causing pump to continue to operate when water is below
lower float.
3. Grinder assembly may be partially clogged causing pump to operate at very reduced capacity.
4. Check valve may be clogged causing low pump flow. Gate valve or street valve may be in off
position.
5. Pump may be air locked.
Circuit breaker trips. 1. Reset breaker by pushing clear down on handle then back to “ON” position. If breaker trips again
in few seconds it indicates excessive load probably caused by a short in the motor or control box.
Check out 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. Water shut-off level may be set too high or volume of pumping cycle may be too great allowing
solids to settle out of suspension. Set pump shut-off level at the pumps widest part where volute
case mates with seal chamber - to 1" below. Set water level control (float or weight) to following
approx. levels:
2 ft. dia. basin 12" - 14"
3 ft. dia. basin 6" - 8"
4 ft. dia. basin 6" - 7"
above pump shut-off.
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 or float is set properly this condition generally will not occur.
3. Where all type switches are installed trash may have accumulated around lower weight causing
pump to turn off too soon. Clean trash from weight and suspension cable.

9
HYD12731 (05-15-23)
MOTOR WIRING DIAGRAMS
NOTE: Probe test resistor is used on WGX20 UL Hazardous Location only.
CONTROL
CORD
CONTROL
CORD
CONTROL
CORD
CONTROL
CORD
PROBE TEST RESISTOR
ON HAZARDOUS LOCATION ONLY
PROBE TEST RESISTOR
ON HAZARDOUS LOCATION ONLY
PROBE TEST RESISTOR
ON HAZARDOUS LOCATION ONLY
PROBE TEST RESISTOR
ON HAZARDOUS LOCATION ONLY
–
––
–
NOTE: Probe test resistor is used on HWG(X) 200 UL Hazardous Location only.

10 HYD12731 (05-15-23)
WARRANTY
740 EAST 9TH STREET 490 PINEBUSH ROAD, UNIT #4
ASHLAND, OHIO, USA 44805 CAMBRIDGE, ONTARIO, CANADA N1T 0A5
419-289-1144 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.

11
HYD12731 (05-15-23)
NOTES

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continuously improving our products and services, Pentair reserves the right to change specications without prior notice. Pentair is an equal opportunity employer.
©2022 Pentair. All Rights Reserved. HYD12731 (05-15-23)
1101 Myers Parkway
Ashland, OH 44805
Ph: 855.274.8947
490 Pinebush Road,
Unit 4
Cambridge, Ontario,
Canada N1T 0A5
PH: 800-363-7867
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