Pentair MYERS WHR5H Series User manual

pentair.com
INSTALLATION & OPERATION MANUAL
SUBMERSIBLE SEWAGE PUMPS
WHR5H, 10H, 15H, 20H SERIES
MY23833A551 (10-01-2022)
©2022 Pentair. All Rights Reserved.

2MY23833A551 (10-01-22)
SAFETY INFORMATION ..........................................................................................................................................................................3
INSTALLATION & MAINTENANCE ....................................................................................................................................................... 4-6
TROUBLESHOOTING...............................................................................................................................................................................6
WIRING DIAGRAMS & DIMENSIONS .........................................................................................................................................................7
REPAIR PARTS LIST ................................................................................................................................................................................8
VARIABLE PARTS CHART........................................................................................................................................................................9
WARRANTY............................................................................................................................................................................................ 11
TABLE OF CONTENTS

3
MY23833A551 (10-01-22)
3
E-03-600 (07-15-22)
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:
DANGER 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 NOTICE indicates special instructions that are
important but not related to hazards.
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 SAFETY
 Carefully read and follow all safety instructions in this
manual and on the unit itself.
 Do not touch an operating motor. Modern
motors can operate at high temperatures. To avoid burns
when servicing pump, allow it to cool for 20 minutes after
shutdown before handling.
 Follow all applicable local and state codes and regulations.
 Keep safety labels in good condition, replacing any missing
or damaged labels.
 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 is permanently lubricated. No oiling or greasing is
required in normal operation.
 Periodically inspect pump and system components.
 Wear safety glasses at all times when working on pumps.
 Keep work area clean, uncluttered and properly lighted.
Store all unused tools and equipment.
 DO NOT use to pump flammable liquids.
ELECTRICAL SAFETY
Hazardous voltage. Can shock, burn, or kill.
When installing, operating, or servicing this pump, follow the
safety instructions listed below.
 ELECTROCUTION HAZARD: Must be installed
by a qualified professional. Disconnect all electrical power
before attempting service.
 DO NOT modify the cord. When wiring to a system control,
connect ground lead to the system ground.
A water test must be taken before installation
of any water treatment equipment. The water quality can
significantly influence the life of your system. You should
test for corrosive elements, acidity, total solids and other
relevant contaminants, including chlorine and treat your water
appropriately to ensure satisfactory performance and prevent
premature failure.
SAFETY INFORMATION
Before Installation: This manual contains important information
for the safe use of this product. Read this manual completely
and follow the instructions carefully. Reasonable care and
safe methods relating to the installation and operation of
this product should be practiced. Check local codes and
requirements before installation.
RISK OF ELECTRICAL SHOCK AND FIRE. May
result in serious injury, death or fire hazard. 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 by OSHA as a
confined space.
RISK OF FIRE OR EXPLOSION. Do not smoke or
use open flames in or around this system. This system is not
intended for use in hazardous locations per NFPA 70 National
Electric Code. Do not pump flammable liquids.
CUTTING RISK. Risk of serious cutting or
amputation exists. Disconnect all power sources prior to
servicing pump. Pump may start without warning.
 DO NOT modify the cord and plug. When using the cord
and plug, plug into a grounded outlet only. 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.
 Submersible sewage 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. Pump is
designed to be installed in a sump or wet location where
drainage collects.
 DO NOT THROW AWAY OR LOSE THIS MANUAL. Keep it
in a safe place so that you may refer to it often for the
continued safe operation of the product.
Single phase pumps with automatic heat
sensor reset will restart without warning as the motor cools.
Therefore, never do service work on the pump unless power
supply is disconnected.
RISK OF ELECTRIC SHOCK. Pumps without seal
leak detectors are supplied with a grounding connector and
grounding-type attachment plug on the power cord. To reduce
the risk of electric shock, be certain that it is connected only
to a properly grounded, grounding-type receptacle. DO NOT
cut off ground pin or use an adapter fitting. DO NOT use an
extension cord with this pump. Entire plug may be cut off if a
control panel is used.
When wiring this pump follow all local electrical and safety
codes and ordinances as well as the most recent National
Electric Code (NEC-ANSI/NFPA 70).
All pumps have a GROUND WIRE that is connected to a screw
in the metal motor housing. This wire goes to the receptacle
or control box which must be connected to an NEC approved
ground.

4MY23833A551 (10-01-22)
INSTALLATION & MAINTENANCE
GENERAL DESCRIPTION AND USES
The WHR Series are solids handling pumps that can be used to
pump RAW SEWAGE for COMMERCIAL and DOMESTIC use, but
are not intended to handle large rags, mop heads or strings.
All pumps can be used for normal sewage duty where extra
capacity is required.
RECESSED IMPELLERS
All of the pumps are of the recessed impeller type that provides
a clear volute passage for solids as no solids pass through the
impeller.
All of the pumps listed can be used to pump septic tank
EFFLUENT or GROUND sewage as used in some pressure sewer
systems.
THESE PUMPS ARE NOT APPROVED FOR, AND
SHOULD NOT BE USED IN SWIMMING POOLS OR FOUNTAINS.
AIR LOCKING
A sewage pump is air locked if water traps air in the pump and it
cannot get out, thus preventing the pump from operating.
In installations of this type a 1/8" hole should be drilled in the
discharge pipe below the check valve. The check valve should
be 12 to 18 inches above pump discharge.Do not put check valve
directly into pump discharge opening.
LEVEL CONTROLS
All pumps must use certified level control switches for
automatic operation. Level control rating must be at least equal
to the horsepower rating of the pump.
Plug-in cords can be used on all the single phase pumps without
seal leak detector. This cord has a GROUND pin that plugs into a
grounded receptacle. The grounded receptacle cannot be used
in the wet sump or basin due to DANGER of current leakage.
Sealed junction boxes must be used in wet sumps or basins to
make connections to motor cord.
MOTOR TYPES
All single phase pump motors have internal capacitors.
Automatic reset overload switches are attached directly to
the motor windings on single phase pumps. Three phase pump
motors are squirrel cage induction type.
INSTALLATION
Pumps can be installed inside sealed basins with proper venting
for either simplex or duplex systems. Simplex or duplex basin
systems are available.
Basins are not intended for use with home septic systems. They
are for use in office buildings and small industrial buildings and
factories.
If raw sewage must be pumped from the home's sewage system,
use outside basins that connect with pressure sewer mains or
gravity sewers, or run to septic tanks.
Basins can be used inside the home where extra capacity sump
pumps are required for water softeners and wash water.
If an inside basin is used, it is usually installed at the time of
pouring the concrete basement floor.
Pumps can be installed in a compartment of septic tanks for
pumping to pressure sewer mains, gravity sewers, leach fields,
or evaporation mounds.
PROPER VENTING FOR BASINS INSTALLED INSIDE
All inside sealed basins must have a 2" or 3" vent pipe installed
in accordance with local codes. Basins for handling softener
water, wash or drainage water do not have to be sealed or
vented.
Outside basins are usually of fiberglass and from 4 to 8 feet deep
and have a sealed cover. Pump is usually installed with a lift-out
rail system so that pump can be removed without disturbing
the discharge piping. The check valve comes out with pump
for servicing. Complete lift-out systems mounted in fiberglass
basins are available to meet customer specifications.
Basin must be vented in accordance with local
plumbing codes. These pumps are not designed for and CANNOT
be installed in locations classified as hazardous in accordance
with the National Electric Code.
PIPING
Pumps are fitted with 2" or 3" female threaded pipe flange.
Galvanized or PVC plastic pipe can be used. Plastic pipe is
preferred for raw sewage or septic tank effluent.
CHECK VALVES AND SHUT-OFF VALVES
All pumps must have check valves and shut-off valves in the
discharge line. Check valves must be flapper type with outside
spring or ball type. Shut-off valves can be ball or gate type.
Plastic construction for both check and shut-off valves is
preferred.

5
MY23833A551 (10-01-22)
INSTALLATION & MAINTENANCE
HOW TO SET CONTROLS FOR SIMPLEX SYSTEMS
1. Automatic systems — These systems have the float
switches mounted on the pump, so pump is installed
in the basin and motor cord is plugged into GROUNDED
receptacle. For sealed basin cover, power cord is brought
through a split rubber plug in the basin cover.
2. Where 2 float controls are used, the turn-on control is set
3" to 6" above top of motor, and the turn-off control is set
about 6" to 8" above bottom of basin. If a high level alarm
control is used, it is set about 6" above upper control. If
basin depth will not allow these settings, closer spacing can
be used.
HOW TO START SIMPLEX SYSTEMS
NOTE: ALWAYS HAVE ELECTRICIAN MAKE ELECTRICAL CHECKS.
1. For single-phase pumps with plug cords piggyback into
receptacle and run water into basin until pump starts. Allow
pump to make several on/off cycles. Leave power cord
plugged in.
If pump runs but does not pump it may be air locked. Unplug
cord and crack union in the discharge line, then restart
pump. This should vent off any trapped air. Retighten union.
2. With 2 float controls turn on power at the control box and
run water into basin. When level gets above top control,
pump should start and continue to pump until level drops
to lower control, stopping pump. Run pump through several
cycles. If pump runs but does not pump, turn off power
and check for an air lock. Leave power on for automatic
operation.
For all cases if motor does not start when water level is up,
check for proper plug-in or that start switch is on, or if fuse is
blown.
STARTING PUMP PIGGYBACK (AUTOMATIC) USING MECHANICAL
SWITCH WITH SERIES PLUG – SIMPLEX SYSTEM
1. These pumps have a mechanical (mercury-free) float switch
with a 20 ft. cord and a 115 volt or 230 volt series piggyback
plug on 1/2 HP with switch mounted to the pump. On 3/4, 1,
and 2 HP, it requires 20 ft. cord and 230 volt only.
2. Plug the switch cord plug into a proper voltage, properly
grounded outlet.
3. Plug the pump power cord into the back of the switch cord
series plug.
4. Tape the cords to the discharge pipe every 12".
5. Run water into basin until pump starts. Be sure discharge
line valve is open.
6. Allow pump to operate through several on/off cycles.
HOW TO SET CONTROLS AND START DUPLEX SYSTEMS
1. Control box must be used on all duplex systems
2. Four float controls are used for duplex systems. Set turn-on
control 6" to 8" above pumps. Set turn-off control 8" to 10"
above bottom of basin. Set override control 6" to 8" above
turn-on control. Set high level alarm control about 6" to 8"
above override control. Mark all control cords so that they
can be connected correctly in the control box.
3. Turn Hand-Off-Auto switches to OFF position and close
circuit breaker.
4. Turn both H-O-A switches to the AUTO position and run
water into basin. When level rises and activates the turn-on
switch, one pump should start and run. Pump will continue
to run until lower control is exposed, stopping pump.
5. Run water into sump again and when water level raises the
turn-on control, opposite pump will start and run until level
drops exposing lower control, stopping pump.
6. Run this test several times to be sure pumps are alternating
properly.
7. To check high level alarm, again turn both switches to OFF
and fill basin until level is above the alarm control. Turn
switches to AUTO position and alarm buzzer should sound
and alarm light should come on. When level drops below the
alarm, control buzzer should stop.
8. If pumps operate as described, then set both H-O-A to
AUTO and pumps are ready to operate automatically.
NEVER WORK ON PUMPS OR CONTROL BOXES UNTIL
CIRCUIT BREAKERS ARE TURNED OFF. Always have a
qualified electrician make electrical connections and
service checks.

6MY23833A551 (10-01-22)
INSTALLATION & MAINTENANCE
NEVER WORK ON PUMPS OR CONTROL BOXES
UNTIL CIRCUIT BREAKERS ARE TURNEDM OFF. Always have a
qualified electrician make electrical connections and service
checks.
SPECIAL INSTRUCTIONS FOR 3-PHASE PUMPS
Only qualified persons shall service and install
this pump. The pump must be wired by a qualified electrician,
using an approved starter box and switching device.
Risk of electric shock. Do not remove cord and
strain relief. Do not connect conduit to pump.
1. Three phase pumps are always installed with control boxes
having magnetic starters with 3-leg overload protection.
DO NOT TRY TO RUN THREE PHASE PUMPS DIRECTLY
ACROSS THE LINE.
2. To Connect Pump: Run wire from pump to the bottom
of control box or appropriate junction box suitable for
enclosing splice connections. A hole must be cut into the
control box for the wires. With power to control box off,
connect green (ground) line to ground lug. Connect black
(power) wires to power lead terminals. Make sure that all
wires are inside control box and not in a position to be
pinched or shorted when the door is closed.
3. All three phase motors can run either direction. Rotation
can be changed by interchanging any two line leads at
magnetic starter. BE SURE CIRCUIT BREAKER IS OFF
BEFORE MAKING THIS CHANGE.
To find if rotation is correct, operate pumps and check
delivery operation. If flow and head are low, the rotation is
wrong. With duplex pumps check operation of both pumps.
4. All pump impellers either single or three phase must turn
counterclockwise when looking into pump inlet. If uncertain
of rotation, TURN OFF POWER and lift pump from basin
using the lifting ring (with cord connected) and lay pump on
side so impeller can be seen. Turn on power and start pump
using hand position of H-O-A switch. Turn on and off fast,
so that coast of impeller can be seen.
RISK OF AMPUTATION WHEN PUMP STARTS.
Never put hand or fingers on the impeller. Interchange any two
line leads at the magnetic starter to change rotation.
TROUBLESHOOTING
PUMP DOES NOT RUN OR START WHEN WATER IS UP IN TANK.
1. Check for blown fuse or tripped circuit breaker.
2. Check for defective level switch.
3. Where control panel is used be sure H-O-A switch is in the
AUTO position. If it does not run, turn switch to the HAND
position and if the pump runs then the trouble is in the
automatic electrical system. Have an electrician make
electrical checks.
4. Check for burned-out motor. Occasionally lightning can
damage a motor even with lightning protection.
5. Where plug-in cords are used be sure contact blades are
clean and making good contact. DO NOT USE PLUG-IN
CORDS INSIDE A BASIN OR WET WELL.
PUMP RUNS BUT DOES NOT DELIVER FLOW.
1. Check for airlock. Start and stop pump several times. If this
does not help it may be necessary to loosen a union in the
discharge line to relieve airlock.
2. Check valve may be installed backward. Check flow arrow
on valve body. Check shut-off valve. It may be closed.
3. Check vertical elevation of discharge pipe. It may be higher
than pump can support.
4. Pump inlet may be plugged. Remove pump to check.
5. Level control ball or weight may be stuck on side of basin.
Be sure it floats freely.
RISK OF ELECTRICAL SHOCK. Always unplug
power cords or turn off all main and branch circuit breakers
before doing any work on the pump. If control panel is remote
from pump, disconnect lead wires to motor so that no one can
turn the circuit breaker back on.

7
MY23833A551 (10-01-22)
WIRING DIAGRAMS & DIMENSIONS
DIMENSIONS
[DIMENSIONS IN MM]
10 3/8"
[264]
19 3/4"
[502]
2" NPT Flanged
Discharge, 3" NPT
Optional [502]
2 1/8"
[54] 6 5/8"
[168]
13 1/4"
[337]
6 1/4"
[159]
2 15/18"
[74]
115V, 200V OR 230V
1 PHASE, P.S.C.
460V – 3 PHASE 575V – 3 PHASE
200V – 3 PHASE
230V – 3 PHASE
208V – 3 PHASE (1–2 HP)
WIRING DIAGRAMS
Black
Green
Ground
White
Black
White
Black
White
Red
Green
Ground
Black
White
Red
Green
Ground
Black
White
Red
Black
Green
Ground

8MY23833A551 (10-01-22)
REPAIR PARTS LIST
27
26
25
24
23
22
18
9
17
15
16
14
13
12
11
10
9
8
7
6
5
4
2
1
REF. DESCRIPTION QT Y. PART NUMBER
1Cord, Power 1See Chart
2Housing Motor 125327D000P
4 Oil, Transformer (5 gal.) .8-1 gal RTF
5, 6 Stator, Rotor shaft with shell 1 See Chart
6A Connectors (3 ph only) 3-6 15781A001
7Seal, shaft 125370A000
8 Plate, brg & seal 1 25367D000
9 Screw, cap, 5/16 x 1-1/4 8 19100A012
10 Flange, 2" CI 8 002080002
10 Flange, 3" CI alternate 8 002070002
11 Screw, cap, 1/2-13 x 1-1/2 2 19103A043
12 Gasket, rubber 1003240011
REF. DESCRIPTION QT Y. PART NUMBER
13 Case, volute 1 27195E000
14 Impeller, DI (std. series) 1 See Chart
15 Screw, Machine #10 x 3/8 106106A042
16 Sealant (Grade 271 Loctite®) 114550A001
17 Washer, Impeller Retainer 105030A262
18 Gasket, tetraseal, 7x6-3/4x1/8 105014A181
22 Capacitor (1 ph only) 1See Chart
23 Plug, 1/4" pipe 105022A092
24 Washer, 3/32" Thk. 105030A235
25 Gasket, rubber 105014A193
26 Washer, 1/32" Thk. 105030A234
27 Nut, cord plug, solid 125341A002

9
MY23833A551 (10-01-22)
VARIABLE PARTS CHART
HP VOLTS PH
POWER
CORD W/
PLUG
POWER
CORD NO
PLUG
CAP. STATOR ROTOR AND
SHAFT

ASSEMBLY
WHRH
IMPELLER DI
1/2 115 125338B004 25338B006 23839A000 25484D100 27194C002
1/2 208 125338B006 23839A000 25484D101 27194C002
1/2 230 125338B005 25338B006 23839A000 25484D101 27194C002
1/2 208 325338B003 25484D102 27194C002
1/2 230 325338B003 25484D102 27194C002
1/2 460 325338B003 25484D102 27194C002
1/2 575 325338B003 25484D103 27194C002
1208 125338B002 23838A000 25484D104 27194C001
1230 125338B001 25338B002 23838A000 25484D105 27194C001
1208 325338B003 25484D106 27194C001
1230 325338B003 25484D106 27194C001
1460 325338B003 25484D106 27194C001
1575 325338B003 25484D107 27194C001
1-1/2 208 125338B002 23838A000 25484D104 27194C004
1-1/2 230 125338B001 25338B002 23838A000 25484D105 27194C004
1-1/2 208 325338B003 25484D106 27194C004
1-1/2 230 325338B003 25484D106 27194C004
1-1/2 460 325338B003 25484D106 27194C004
1-1/2 575 325338B003 25484D107 27194C004
2208 125338B009 23839A000 25484D108 27194C011
2230 125338B009 23839A000 25484D109 27194C011
2208 325338B008 25484D111 27194C011
2230 325338B008 25484D111 27194C011
2460 325338B003 25484D111 27194C011
2575 325338B003 25484D112 27194C011

10 MY23833A551 (10-01-22)
PAGE INTENTIONALLY LEFT BLANK

11
MY23833A551 (10-01-22)
WARRANTY
Limited Warranty
Myers®warrants to the original consumer purchaser (“Purchaser” or “You”) of the products listed below, that they
will be free from defects in material and workmanship for the Warranty Period shown below.
Product Warranty Period
whichever occurs first:
Jet pumps, small centrifugal pumps, submersible
pumps and relatedaccessories
12 months from date of original installation,
or 18 months from date of manufacture
Fibrewound Tanks 5 years from date of original installation
Steel Pressure Tanks 5 years from date of original installation
Sump/Sewage/Effluent/Utility/Battery Backup Products 36 months from date of manufacture
Wastewater Solids Handling Pumps 12 months from date of shipment from factory
or 18 months from date of manufacture
Our warranty applies only where such products are used in compliance with the requirements of the applicable
product catalog and/or manuals. For additional information, please refer to the applicable standard limited
warranty featured in the product manual.
Our warranty will not apply to any product that, in our sole judgment, has been subject to negligence,
misapplication, improper installation, or improper maintenance. Without limiting the foregoing, operating a
three phase motor with single phase power through a phase converter will void the warranty. Note also that
three phase motors must be protected by three-leg, ambient compensated, extra-quick trip overload relays of
the recommended size or the warranty is void.
Your only remedy, and MYERS’s only duty, is that MYERS repair or replace defective products (at MYERS’s choice).
You must pay all labor and shipping charges associated with this warranty and must request warranty service
through the installing dealer as soon as a problem is discovered. No request for service will be accepted if
received after the Warranty Period has expired. This warranty is not transferable.
MYERS SHALL NOT BE LIABLE FOR ANY CONSEQUENTIAL, INCIDENTAL, OR CONTINGENT DAMAGES
WHATSOEVER.
THE FOREGOING LIMITED WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS AND IMPLIED
WARRANTIES, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. THE FOREGOING LIMITED WARRANTIES SHALL NOT EXTEND BEYOND THE
DURATION PROVIDED HEREIN.
Some states do not allow the exclusion or limitation of incidental or consequential damages or limitations on the
duration of an implied warranty, so the above limitations or exclusions may not apply to You. This warranty gives
You specific legal rights and You may also have other rights which vary from state to state.
This Limited Warranty is effective January 1, 2021 and replaces all undated warranties and warranties dated
before January 1, 2021.
PENTAIR MYERS
293 Wright Street, Delavan, WI 53115
Phone: [phone] • Fax: [phone] • www.femyers.com
In Canada: 490 Pinebush Road, Unit 4, Cambridge, Ontario N1T 0A5
Phone: [phone] • Fax: [phone]

All indicated Pentair trademarks and logos are property of Pentair. Third party registered and unregistered trademarks and logos are the property of their respective owners. Because we are
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. MY23833A551 (10-01-22)
293 Wright Street
Delavan, WI 53115
Ph: 888.987.8677
Fx: 800.426.9446
490 Pinebush Road,Unit 4
Cambridge, Ontario, Canada N1T 0A5
Ph: 800.363.7867
Fx: 888.606.5484
pentair.com