Pentair MYERS AG3 Series 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.
AG3 and AG5 SERIES
AGRICULTURAL PUMPS
INSTALLATION AND SERVICE MANUAL
Part # 23833A507 | © 2014 Pentair Pump Group, Ltd. | 06/27/14

2
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.
m DANGER: Risk of Electrical Shock or
Electrocution. 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.
m DANGER: 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.
m DANGER: 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.
m DANGER: 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. Consult factory
for optional equipment rated for hazardous
location use.
m DANGER: Cutting Risk. Risk of serious cutting
or amputation exists. Disconnect all power
sources prior to servicing pump. Pump may start
without warning.
m DO NOT run the pump dry. Dry running can overheat
the pump (causing burns to anyone handling it) and
will void the warranty.
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.
APPLICATION
These pump systems are designed for pumping effluent
or sewage water with a pH ranging from 5 to 9, specific
gravities from 0.9 to 1.1, viscosities ranging from 28 to
35 S.S.U. and temperatures up to 140ºF.
UNPACKING PUMP
Remove pump from carton. When unpacking unit,
check for concealed damage. Claims for damage
must be made at the receiving end through the delivery
carrier. Damage cannot be processed from the factory.
PUMP MODELS
These instructions cover the installation of the AG3 and
AG5 series of agricultural pumps. The pumps are designed
for handling raw agricultural sewage and wastewater.
The AG3 and AG5 series are made with a recessed
impeller. All models will pass 3" diameter solids and have
a 4" standard flange discharge.
VOLTAGES
All single phase motors are for 230 volts only.
ELECTRICAL
To reduce risk of electrical shock, disconnect the pump
from the power source before handling or servicing.
Never operate a pump with a power cord that has frayed
or brittle insulation. Never let cords or plugs lie in water or
handle connected power cords with wet hands.
PUMPS
Pump builds up heat and pressure during operation.
Allow time for pump to cool before handling or servicing.
Make sure lifting handles are securely fastened each time
before lifting and do not lift pump by the power cord.
Do not exceed manufacturer’s recommendation for
maximum performance, as this could cause the motor
to overheat.
Submersible solids handling 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.
Do not operate pump without safety devices in place.
IMPORTANT! Myers is not responsible for losses, injury
or death resulting from a failure to observe these safety
precautions, misuse or abuse of pumps or equipment.
SEAL FAILURE
All motors have a probe installed in seal chamber near the
bottom so that any leakage past the lower seal into seal
chamber is detected.
A red warning light at the control panel comes on if water
enters seal chamber. This is an indicator only and does
not stop motor, but warns that seal should be replaced
immediately. RUNNING WITHOUT SEAL REPLACEMENT
COULD DAMAGE MOTOR.
HEAT SENSOR
All motors have a heat sensing thermostat installed in top
winding of motor. Any motor winding temperature above
248°F will open thermostat and stop motor. Thermostat
will automatically reset as soon as it has cooled.
CAUTION: WITH AUTOMATIC RESET, MOTOR CAN
START AT ANY TIME AFTER THERMOSTAT IS TRIPPED,
SO NEVER DO SERVICE WORK ON PUMP UNLESS
POWER SUPPLY IS DISCONNECTED.
IMPORTANT: BE SURE HEAT SENSOR WIRES AND
SEAL FAILURE WIRES ARE CONNECTED AT PANEL
TERMINAL BLOCK. WARRANTY IS VOID IF WIRES ARE
NOT CONNECTED OR ARE JUMPED.

3
MOTOR POWER CABLE AND
CONTROL CABLE
Each power cord has 4 conductors – white, black, red
and green. Interchanging any two leads reverses the
motor on 3ø only.
The white and black leads connect to the two line
terminals and the red connects to the start winding
terminal. The green is for ground and must be
connected per national or local code requirements.
The control cable has 5 conductors – black, white,
red, orange and green. White and black connect to
heat sensor terminals; red and orange connect to
the seal failure terminals and green connects to the
ground terminal.
SINGLE PHASE MOTORS
Single phase motors are for 230 volts only. A special
control panel with start and run capacitors and start
relay are required for these pumps.
These control panels must be obtained from F.E. Myers
or must be approved by Myers or warranty is void.
OIL FILLED
Motor chamber and seal chamber are oil filled for
coolest running, best heat transfer and best lubrications
for bearings and seals. Motor requires no oiling or
greasing. Motor is sealed for life of bearings.
POWER CORD SIZES
Power cord size depends on motor hp size and voltage.
Motors are furnished for single voltage.
CAUTION: NEVER PULL PUMP OR WORK ON
CONTROL BOX UNTIL INCOMING POWER IS
DISCONNECTED. NEVER RUN MOTOR UNTIL GREEN
GROUND CONDUCTOR IS PROPERLY CONNECTED.
MAKING ELECTRICAL CONNECTIONS
Level controls are held by support bracket and cords
are adjusted for proper depth.
Lower turnoff control should be set so that pump stops
when water level is about at top of check valve or
straight through casting. Upper turn-on control is set
to start pump when level is at height specified above
pump. Override control is set at height specified above
upper turn-on control. Alarm control is set about 6" to
12" above override control. No control should be set
above inlet invert.
If control panel is mounted directly on basin top, the
power and control wires are taken directly to control
box and are sealed in the cord plate with cord grip
connectors.
If panel is installed remote from basin, the cords can
be taken through a conduit to control panel, or junction
box can be used in the basin to make connections.
The Myers junction box has a built-in sealing connector
to seal the outgoing wires.
REMOVING PUMP CASE AND IMPELLER
In case of wear, damage, plugged pump or replacing
a defective motor, the pump volute case and impeller
can be removed in the field.
Remove bolts between seal housing flange and volute
case. The motor and impeller can now be lifted off as
a unit. If necessary to remove impeller, lay pump on
its side. With a screwdriver bend the tabs of the lock
washer away from the head of the hex head bolt.
Loosen and remove the bolt by turning counter-
clockwise. Impeller is mounted by a straight fit with
driving key. Pry evenly on opposite impeller sides
behind the impeller. Set motor on end with shaft up
after removing impeller so that oil will not drain past
the seal.
REPLACING IMPELLER AND PUMP CASE
Apply Loctite® in keyway, impeller bore and on the
threads of the hex head cap screw. Before placing the
impeller on the shaft, be sure the mechanical seal and
its spring are in place. Position retaining washer with
long pin extension in keyway.
Obtain a new lock washer and flatten two tabs located
180° from the locking projection on the inner edge of
the washer. There should be one flattened tab on each
side of the pin extending from the retaining washer.
Assemble hex head cap screw and tighten securely.
Bend lock washer tabs up against hex head on the
bolt. Do not bend up the two tabs flattened on each
side of the pin in the retaining washer.
AG SERIES CONNECTION DIAGRAMS

4
AG SERIES 3–5 HP REPAIR PARTS LIST
Ref. Part Number Description Qty.
1
25371A010 BAIL, LIFTING, COMPLETE 1
25371B000 BAIL, LIFTING 1
05484A016 WASHER, LOCK 1/2" 2
19103A052 HEX SCREW, 1/2" x 1-1/4" 2
2 23768A020 SUPPORT LEG-625 1
3 22569B031 CORD CAP 35' 1
4 15781A007 CONNECTOR 3
5 05434A043 MACH. SCREW, #10-24 x 3/8" LG. 1
6 05030A126 WASHER, 7/16" x 13/64" x 1/32" 1
7 05876A123 O-RING, 4-7/8" x 4-5/8" x 1/8" 1
8 07597A017 MACH. SCREW, SOCKET FLAT HD., 5/16"-18 x 1" 2
9 06107A015 LOCK WASHER, #10 1
10 19102A006 CAP SCREW, HEX HD., 7/16"-14 x 1-1/2" 8
11 05876A112 O-RING, 5-1/2" x 5-1/4" x 1/8" 1
12 22590B000 CAP, UPPER BEARING 1
13 10649A102 TUBE, PLASTIC, 1-1/4" LG. 2
10649A116 TUBE, PLASTIC, 3" LG. 2
14 19331A006 WASHER, FINGER SPRING 2
15 08565A022 BEARING, BALL 1
16 24407C200 STATOR (AG3) 1
24407C200 STATOR (AG5) 1
17 22846C100 ROTOR W/SHAFT 1
18 08565A023 BEARING, BALL 1
19 19102A023 CAP SCREW, HEX HD., 7/16"-14 x 2-1/4" 4
20 22571D000 HOUSING, MOTOR 1
21 22578A100 WIRE, ELECTRODE 2
22 05876A114 O-RING, 7" x 6-3/4" x 1/8" 1
23 05434A025 SCREW, MACHINE 2
24 25343A100 PROBE, SEAL LEAK 2
25 05876A113 O-RING, 6" x 5-3/4" x 1/8" 1
26 22577A000 SEAL, 1-1/4" SHAFT (UPPER) 1
27 12558A008 RING, RETAINING 1
28 22576D010 HOUSING, SEAL (UPPER) 1
29 22853C001 HOUSING, LOWER SEAL W/BEARING 1
30 06106A028 CAP SCREW, SOCKET HD., 3/8"-16 x 1" 4
31 05231A079 GASKET, VELLUMOID 1
32 27067A001 SEAL, 1-1/4" SHAFT (LOWER) 1
33 22855C010 IMPELLER (AG3) 1
22855C020 IMPELLER (AG5) 1
34 22854D001 CASE, VOLUTE 1
35 08001A007 WASHER, BEARING LOCK 1
36 19101A017 CAP SCREW, HEX HD., 3/8"-16 x 1-1/4" 1
37 05818A074 KEY, 1/4" SQUARE x 1-1/16" LG. 1
38 23609A001 WASHER, IMPELLER RETAINER W/PIN 1
CAP SCREW TORQUE VALUE
3/8-16 20 ft.-lbs.
1/2-13 43 ft.-lbs.
5/8-11 93 ft.-lbs.
3/4-10 128 ft.-lbs.
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5
CONDITION
Pump runs but does not pump liquid from basin.
Red light comes on at control box.
PROBABLE CAUSE
Pump impeller may be air locked; this occasionally
occurs on a new installation. Start and stop pump
several times to purge air. Be sure air vent hole in volute
case is clean.
Run additional water into basin so that pump will be
submerged deeper to clear air.
If pump is three phase, rotation may be wrong.
If pump has been installed for some time and does not
pump, it may be clogged at inlet.
Discharge gate valve may be closed.
Discharge check valve may be clogged or have a broken
clapper or spring.
Discharge head may be too high. Check elevation.
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.
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 for immediate replacement of lower seal.
CHECKING FOR MOISTURE IN MOTOR
Use ohmmeter and set on highest scale.
Readings on the large power cord between any of the
conductors should be more than 500,000 ohms. If
reading is below 500,000 ohms, the motor housing
and stator should be serviced at an authorized
service facility.
RESISTANCE OF WINDINGS
Every motor winding has a fixed resistance.
Winding must check close to the specification values
to operate properly. This winding resistance also
shows if motor is connected for voltage being used.
Use ohmmeter for this test and set on scale to read
directly in ohms.
TROUBLESHOOTING

6
CONDITION PROBABLE CAUSE
Overload trips at control box and alarm Push in on red reset button to reset overload. If
buzzer or flashing red light comes on due to overload trips again after short run, pump has some
high water level in basin. damage and must be removed from basin for checking.
Trouble may be from clogged impeller causing motor to
overload or could be from failed motor.
Trouble may be from faulty component in control box.
Always check control box before removing pump.
Yellow run light stays on continuously. Indicates H-O-A switch may be in the Hand position.
Level control switch may have failed, causing pump to
continue to operate when water is below lower control.
Impeller may be partially clogged, causing pump to
operate at very reduced capacity.
Gate valve or check valve may be clogged, causing low
pump flow.
Pump may be air logged.
Circuit breaker trips. Reset breaker by pushing clear 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 out instructions
given with control box before pulling pump.
If this condition happens after an electrical storm, motor
or control box may be damaged by lightning.
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. Impeller may be partially clogged with some foreign
objects, causing noise and overload on the motor.
Impeller may be rubbing on wear ring due to dent shaft
or misalignment.
Pump may be operating too close to shut-off.
Check head.
Grease and solids have accumulated around
pump and will not pump out of basin.
Lower control switch may be set too high.
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 is set
properly this condition generally will not occur.
Trash and grease may have accumulated around floats,
causing pump to operate erratically.

THIS PAGE INTENTIONALLY LEFT BLANK

1101 MYERS PARKWAY 490 PINEBUSH ROAD, UNIT #4
ASHLAND, OHIO, USA 44805 CAMBRIDGE, ONTARIO, CANADA N1T 0A5
419-289-1144 800-363-PUMP
WWW.FEMYERS.COM
Warranty Rev. 12/13
STANDARD LIMITED WARRANTY
Pentair Myers®
warrants its products against defects in material and workmanship for a period of 12 months from the
date of shipment from Pentair Myers or 18 months from the manufacturing date, whichever occurs first – provided
that such products are used in compliance with the requirements of the Pentair Myers 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 Myers, at its discretion, will repair or
replace to the original user, the parts that prove defective in materials and workmanship. Pentair Myers 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 Myers website: http://forms.pentairliterature.com/startupform/startupform.asp?type=m.
Warranty is effective only if Pentair Myers 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 Myers will cover only the lower
seal and labor thereof for all dual seal pumps. Under no circumstance will Pentair Myers 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 Myers 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 Myers or an authorized
Pentair Myers service provider; (h) to any unit that has been repaired using non factory specified/OEM parts.
Warranty Exclusions: PENTAIR MYERS MAKES NO EXPRESS OR IMPLIED WARRANTIES THAT EXTEND BEYOND
THE DESCRIPTION ON THE FACE HEREOF. PENTAIR MYERS SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE.
Liability Limitation: IN NO EVENT SHALL PENTAIR MYERS BE LIABLE OR RESPONSIBLE FOR CONSEQUENTIAL,
INCIDENTAL OR SPECIAL DAMAGES RESULTING FROM OR RELATED IN ANY MANNER TO ANY PENTAIR MYERS
PRODUCT OR PARTS THEREOF. PERSONAL INJURY AND/OR PROPERTY DAMAGE MAY RESULT FROM IMPROPER
INSTALLATION. PENTAIR MYERS DISCLAIMS ALL LIABILITY, INCLUDING LIABILITY UNDER THIS WARRANTY, FOR
IMPROPER INSTALLATION. PENTAIR MYERS 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 Myers shall vary or expand the provision hereof.