Pentair Myers VR2 Series Manual

INSTALLATION AND SERVICE MANUAL
GRINDER
PUMPS
Fl
I i
P NTAIR
MYERS
Part II 23833A701 I © 2018 Pentairpie I 07/05/2018
Models
VR2 SERIES
ENGLISH: PAGES 2-8
Installation and Service 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.
~-
c us

i
USAGE
The VR2 Series is a submersible wastewater grinder
pump designed specifically for individual residential and
pressure sewer applications. The pumps are to be used
for domestic sewage only and are not to be used for
pumping commercial or industrial sewage such as from
motels, schools, apartments, factories, etc. THIS PUMP
IS NOT FOR USE IN HAZARDOUS LOCATIONS!
INSPECTING PUMP
Before making any piping or electrical connections,
check the pump for shipping damage or cracks. Using a
flat screwdriver placed in the slot on the shaft end, turn
shaft and impellers to be sure they are free. DO NOT
TURN IMPELLER WITH FINGERS AS EDGES ARE SHARP.
POWER SUPPLY
The VR2 Series grinderpump should be connected only to
a 230 volt, single-phase, 60 Hz power source. The pump
will draw approximately 10.7 amperes at minimum flow
and 15.0 full load amperes. The pump mustbe connected
to a grounded power socket. DO NOT cut off the ground
pin from the power cord plug. ·
POWER CORD
A 20 foot power cord is attached to the grinder pump via
two i'nsulated quick-disconnect terminals and a ground
terminal. To replace a cord, begin by slightly loosening
cord nut in the cord cap plate. Remove cord cap plate
from the motor housing and carefully pull the power
leads up out of the motor housing and disconnect them
from the motor leads. Disconnect the ground wire from
the cap plate and continue to completely loosen the cord
nut from the cap.
To install new cord, feed terminals through cord cap
plate and reconnect power terminals. Reconnect ground
terminal to the bottom side of the cap plate. Carefullyfeed
wires bad~ into the motor housing and fasten the cord
cap plate to the motor housing. Lastly, tighten the cord
nut into the cap plate. Tighten firm, do not overtighten.
The powercord should be replaced ifit has been damaged
in any way or the cord jacket has become brittle.
MOTOR TYPE
The VR2 Series grinder pump contains a 3/4 frame, 2 hp,
single-phase, 60 Hz, 3L150 rpm, capacitor start, capacitor
r·ur, motor with Class F insulation and built-in, on-winding
overload protection. Motor has upper and lower ball
bearings and is oil-cooled and lubricated.
7
A CAUTION!
THE VR2 SERIES GRINDER PUMP SHOULD NEVER BE
WORKED ON WITHOUT FIRST DISCONNECTING THE
POWER CORD.
OIL TYPE
The motor housing contains dielectric transformer oil
to provide good heat transfer and lubrication of ball
bearings; no other lubrication is required. Oil level may
be checked by removing the plug from the top of the
motor housing. The oil level should be filled to the bottom
of the end shield. Do not overfill with oil. Only dielectric
transformeroil obtained from aMyers• authorized service
center should be used.
PUMP SWITCH INSTALLATION INSTRUCTIONS
NOTE: In accordance with third party approval, pump
must be submerged a minimum of 10-9/16" from bottom
of the legs on volute case during operation.
Mounting the Switch
1. Determine pumping range for installation. Do not
tether less than 3-1/2" from pipe.
2. Tighten strap around discharge pipe keeping switch
cable between strap and pipe to prevent slippage.
3. Space small ties at least 1" apart. To readjust ties,
press small tie tabs down.
4. To lock releasable tab, run remaining strap between
tab and head. Tuck strap back through head.
Piggyback Plug Install
A Electrical outlet must not be located in pump
chamber.
A Electrical outlet voltage, piggyback plug voltage, and
pump voltage must match.
1. Follow steps 1through 4 of "Mounting the Switch."
2. Insert switch's piggyback plug into outlet.
3. Plug pump into piggyback plug.
4. Check installation. Allow system to cycle to ensure
proper operation.
Direct Wire Install
1. Follow steps 1through 4 of "Mounting the Switch."
2. Further wiring of switch should be done by qualified
professionals only.
3. Check i!'Stallation. Allow system to cycle to ensure
proper operation.

--~----~~~-----~--------------------------------------·.,,
230\/AC ·
black
white
230V
power
source
In 230 VAC pump installations, one side of the line
going to the pump is always HOT. This condition
exists if the switch is on or off. Install double pole
disconnect on all 230 VAC pump circuits.
SAFETY WARNINGS
A WARNING! Risk of electrical shock. Pumps are
supplied with a grounding conductor and grounding-type
attachment plug on the power cord. To reduce the risk
of electrical shock, be certain that it is connected only
to 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. When wiring
this pump follow all local electrical, safety codes and
ordinances as well as most recent National Electric Code
(NEC-ANSI/NFPA).
The VR2 Series grinder 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 a good outside GROUND such as a metal
water pipe or GROUND STAKE driven at least 8 feet into
the ground.
CALIFORNIA PROPOSITION 65 WARNING:
IA WARNING! This product and related accessories
contain chemicals known to the State of California to
cause cancer, birth defects or other reproductive harm.
DISMANTLING PUMP FOR REPLACEMENT
PARTS
Before dismantling pump for replacement parts, clean
pump thoroughly.
3
REPLACING STATIONARY CUTTER PLATE AND
ROTATING CUTTER
All repairs must be done at the factory or at an authorized
Myers service facility.
A CAUTION!
DISCONNECT ALL POWER AND CONTROL WIRES
TO MOTOR AT CONTROL PANEL BEFORE STARTING
DISASSEMBLY OPERATIONS. NEVER RELY ON OPENING
CIRCUIT BREAKER ONLY.
DISASSEMBLY OF STATIONARY CUTTER
PLATE AND ROTATING CUTTER
1. Remove retaining washerand screw from end ofshaft.
Ascrewdriver can be used to hold the shaft in place by
wedging it between one of the four socket head cap
screws and the rotating cutter while loosening the
screw.
2. Using a rubber mallet, or soft metal hammer, bump
rotating cutter in counterclockwise direction as
thread is right-hand. Unthread rotating cutter from
shaft. Be careful to not lose ring shims that space the
rotating cutter from the stationary cutter plate.
3. Remove four socket head cap screws holding
the stationary cutter plate to the volute. Remove
stationary cutter from volute. If stationary cutter is
stuck, the socket head cap screws can be threaded
into tapped back-off holes in plate. Tighten screws to
remove plate from volute.
4. Inspect rotating cutter and stationary cutter plate for
wear and replace if worn.
5. Make sure pocket in volute is clean and reinstall
stationary cutter plate using the four socket head
cap screws. Apply blue Loctite"to the threads. Do not
overtighten cap screws.
6. Replace ring shims (if removed from the shaft) and
thread rotating cutter onto shaft. Make sure threads
on shaft are clean and use Never-Seez' or other
graphite compound on threads before replacing
rotating cutter.
7. Using a rubber mallet, or soft metal hammer, bump
rotating cutter in clod~wise direction to make sure it
is seated on the impeller.
8. To ensure proper operation of the cutter mechanism.
the gap between the stationary cutter plate and
rotating cutter must be no more than .008". To
check the gap use a .008" feeler gauge. If the .008"
feeler gauge does not fit between the surface of the
stationary cutter and rotating cutter and the motor
shaft turns freely, the gap is set correctly. If the .008"
feeler gauge fits between the surfaces, shims must
be removed to close the gap.

9. Replace retaining washer and screw in the end of the
shaft. Be sure screw is tight. A screwdriver can be
used to hold the shaft in place by wedging it between
one of the four socket head cap screws and the
rotating cutter while tightening the screw.
10. Be sure shaft turns freely after reassembly. Some
drag will occur due to the seal, but there should be
no binding or tight spots when turning the rotating
cutter.
11. If rotating cutter rubs or drags on stationary cutter
plate, recheck gap and re-shim rotating cutter.
TO REPLACE CAPACITORS ONLY
1. Remove oil fill plug near the top of motor housing,and
pour oil out.
2. Loosen the cord nut on power cord until cord is loo,::;e
enough to push cord down into motor housing.
3. Remove four bolts from motor housing and bump
housing with a plastic hammer to loosen. Lay pump
on its side.
4. Remove the housing carefully to be sure that enough
cord is pushed into the housing so as not to create
tension on cord.
WIRING DIAGRAM - MARATHON•
5. Slide motor housing up far enough to expose the
capacitors and to be able to lay the housing down.
6. Disconnect wiring from capacitor and loosen
capacitor clamp and slide capacitor out. Replace with
new capacitor, tighten clamp and reconnect.
7. Check all wiring connectors to be sure they are
secure.
8. Be sure 0-ring is in place.
9. Slide motor housing back onto pump while pulling the
cord out slowly. Assemble motor housing with four
bolts.
10. Reassemble cord nut. Be sure washers are seated
and cord is pulled up against the washers. Tighten nut
securely.
11. Put pump upright and refill motor with Myers
submersible pump oil. DO NOT OVERFILL WITH
OIL. Replace oil plug. Retighten plug firmly, but do
not overtighten.
12. Be sure pump turns freely before connecting power.
Turri pump on side and turn impeller, using screwdriver
in slotted shaft. Plug pump into receptacle to test
operation. Pump mustrun quietly and free ofvibration.
BLACK SCREW ON MOTOR
END BELL
RUN
CAPACITOR
TC"DhJ11',.1/\, C'
I'-' ,,y.,,•1,-,._...,.
z
w
w
fr'.
'-"
0
z
:::,
0
fr'.
'-"

TROUBLESHOOTING GUIDE
Pump does not run or hum.
A.
Line circuit breaker may be off;
J. Pump head may be too high.
See A, B, C, 0, Eor F. or fuse, if used, may be blown or Horizontal distance does not
loose. affect pumping, except loss due
Pump runs but does not deliver
B.
Water level in sump may be too to friction.
water. low.
Run in more water. K.
Inlet holes in pump base may
See G, H, I, J, Kor L.
C. Pump cord plug may not be be
clogged. Remove pump and
Pump runs and pumps out sump but making
contact in receptacle. clean out openings.
does not stop.
D. If pump is using the series cord
L.
Impeller or volute openings may
See M.
plug, the two plugs may not be be
plugged or partially plugged.
plugged tightly togeth,er. Remove pump and clean. Check
Pump runs but delivers only small
tether length of switch.
amount of water.
E. Float may be stuck. Be sure float Float is stuck
in up position.
operates freely in basin. Check
M.
See I, J, K, Lor N.
Be sure float operates freely in
tether length of switch. basin.
Fuse blows or circuit breaker trips
F.
If all symptoms check DK, motor
Pump impeller may be partially
when pump starts. winding may
be open; take to
N.
See K, L, N, Dor P.
service center for repair. clogged causing
motor to run
slow, resulting in motor overload.
Motor runs for short time then
G. Check valve may be installed Fuse size or
circuit breaker is too
backward. Arrow on valve points 0.
stops. Then after short period
in direction of flow. small. Must
be 20 amps.
starts again. Indicates tripping
P. Defective motor stator. Return to
overload caused by symptom
H.
Discharge shut-off valve, if used,
shown.
may be closed. Myers service center.
See K, L, Nor P.
I.
Pump may be air locked. Start
For any other symptoms contact a
and stop several times by
plugging and unplugging cord.
Myers authorized service facility. Check vent hole
on pump case
for plugging.
5

I
)\
MOTOR ENO PARTS
Item
1
2
3
4
5
6
3
9
10
11
12
13
14
15
16
17
18
19
20
21
22
'
I
nl
24
25
25
~:.,
L.'
i
23 i
COMMON PARTS LIST
For use with product built with
Marathon• motor.
Engineering
Description
No.
28165B000 Motor Assembly -All Models
28228B001 Impeller, 5.313" 0.0. - VRS20 models
28228B002 Impeller, 6.00" 0.0. -VRH20 models
28228B003 Impeller,
4.50" 0.0. - VRF20 models
25338B001
Power Cord, 14-3, 20'
281328000 Motor Housing
281880000 Seal/Bearing Housing
28188AOOO
Bearing Retainer, VRS20
25193B000 Cord Cap Plate
281330001 Volute
282278000 Stationary Cutter- VRS20 models
281468000 Stationary Cutter - VRH20 models
281688000 Stationary Cutter - VRF20 models
281458000
Rotating Cutter - VRS20 and VRH20
models
281878000 Rotating Cutter - VRF20 models
132531001 Premium Oil
21576A011
Seal, 7/8" Shaft
28229AOOO Volute Shim; .005 Thickness
28229A001 Volute Shim; .010 Thickness
28229A002 Volute Shim; .020 Thickness
05876A125 0-ring, 1/8" X 5.8591.D.
05876A244
0-ring, 3/32" X 1.7371.0.
253718010
Lifting Bail
05030A020 Washer, Flat. 5/16"
05022A088 Plug, 1/4" Pipe
001780081 Screw, Socket Head, 5/16" X .875"
001780101 Screw, Socket Head, 5/16" X 3.00"
C48200061 Screw, Socket Head, 10-24 X .625"
006280571
Shim: 1.00 OD x .62510 x .002
006280591 Shim; 1.00 00 x .62510 x .020
806280601
Shim; 1.00 OD x .62510 x .030
006280581 Shim; 1.00 00 x .62510 x .005
C7597A018
Screw, Flat Head, 1/4" x .75"
21583AOOO
Washer, Retaining
000630021 Screw, 6-32 x .25"
009950011 Lockwasher, Star
. 45950201
Float Switch, Wide Angle. 20'
(VRS/F/H20A)
)01560711
Spacer, VRF20 models only
Qty
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0.8 Gallons
1
4
1
1
1
1
1
2
1
8
4
7
1
1
1
1
1
1
1
1
1
1

♦ PENTAIR
MYERS
V AND VR SERIES
LIMITED WARRANTY
Pentair Myers' warrants its V and VR series grinders against defects in material and workmanship for a period of 24 months from the
manufacturing date, or 36 months from the manufacturing date with completion of astart-up report within 30 days of installation. Product
must be properly installed, serviced and operated in compliance with the manufacturer's instruction manuals.
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 achange 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. All seal fail and heat sensing devices must be
connected, f~.nctional and monitored or this warranty will be void. Pentair Myers will cover only the lower seal and labor thereof for all
dual seal ~n\:'. Under no circumstance will Pentair Myers be responsible for the cost of field labor, travel expenses, rented equipment,
.\ remoyal/reinf:\allation 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 01· 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 failures resulting from excessive sand, lime, cement, gravel or other abrasive materials
d) To failures caused by scale or corrosion build-up due to excessive hydrocarbons or chemical content
e) To normal maintenance services and parts used in connection with such service;
f) To units that are not installed in acco1·dance with applicable local codes, ordinances and good trade practices;
g) If the unit is moved from its original installation location;
h) If unit is used for purposes other than for what it is designed and manufactured;
i) To any unit that has been repaired or altered by anyone other than Pentair Myers or an authorized Pentair Myers service provider;
j) 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, INCID::cl·!TAL 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 AU. 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 c:insequential
damages and therefore such limitations may not apply to you. no warranties or representations at any time made by any representa'.i,8S of
Pentair Myers shall vary or expand the provision hereof.
1101 Myers Parkway
Ashland. OH 44805
USA
Ph: 855.274.8-ill,8
490 Pinebush Road
Unit 4
Cambridge. Ontario NlT OAS
Canada
Ph: 800.387.4386
Orders Fax: [phone];
www.femyers.com