Pentair HYDROMATIC NSPG 200 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.
MODEL NSPG 200
SUBMERSIBLE
GRINDER PUMP
INSTALLATION AND SERVICE MANUAL
Item # E-03-357 | Part # 5625-357-1 | © 2015 Pentair Ltd. | 06/09/15

2
General
Information
Attention:
This manual contains important
information for the safe use of
this product. Read this manual
completely before using this
product and refer to it often
for continued safe product use.
Reasonable care and safe methods
should be practiced. Check
local codes and requirements
before installation.
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.
WARNING: Before handling
these pumps and controls, always
disconnect the power first. Do not
smoke or use sparkable electrical
devices or flames in a septic
(gaseous) or possible septic sump.
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.
Pump
Information
Pump Description:
The Hydromatic®pumps
covered by these instructions are
submersible grinder pumps.
The cutter blades are on the
suction side of the centrifugal
pump impeller and discharge
directly into the inlet of the
impeller. The integral stainless
steel pump-motor shaft is sealed
by two mechanical seals with an
oil chamber between the seals
to provide lubrication for both
seal faces.
A radial sleeve bearing, lubricated
by the oil in the seal chamber,
is located between the seals and
takes the radial load from the
pump impeller and cutter blades.
The motor winding, rotor and
ball thrust bearing are mounted
in a housing sealed and filled
with oil to lubricate the bearing
and transmit the heat from motor
winding to outer shell. The ball
thrust bearing is held in a movable
cap so that the axial cutter and
cutter ring clearance can be
adjusted from the outside without
the use of shims.
The power cord is sealed into the
motor housing with a cord grip,
and the individual conductors
are sealed into the cord cap with
epoxy sealing compound.
Application:
These pumps are designed
for either home or industrial
sewage discharge applications
with a pH ranging from 6 to 9,
specific gravities from 0.9 to 1.1,
viscosities ranging from 28 to
35 S.S.U., and temperatures up
to 140°F.
Codes:
All local wiring codes must
be observed. Consult the local
inspector before installation
to avoid costly delays that can
occur due to rejection after job
is finished.
Installation
Instructions
Location:
If pumps are installed in an
existing basin or concrete sump,
the piping can either be connected
permanently or rails and brackets
can be furnished for mounting to
walls of basin. In either case, be
sure that the Hydromatic solids
handling check valve is used and
that the pumps are submerged in
a vertical position. The complete
factory built packaged system
is recommended for the most
satisfactory installation and
generally for the lowest cost
where expensive installation
labor is involved.
Electrical Connections:
Make all connections from motor
to control panel to comply with
local codes.
CAUTION: Be sure ground wire
is connected to a good ground
such as a water pipe. This is
important for safety.
Pump
Operations
Starting the Pump:
To start the pump, perform the
following steps in order:
1. If pump is three phase, the
rotation of the impeller must
first be checked. Lift pump
from sump, lay it down and
quickly turn pump on and
then off. The impeller should
turn counterclockwise when
viewed from the suction. If
rotation is wrong, turn off
main breaker and interchange
any two line leads to
motor to correct rotation.
If the pump is piped-in
permanently and inlet cannot
be observed, rotation will
have to be checked by pump
operation described later.
If pump is single phase, no
rotation check is necessary.
2. Run water into sump until
motor is covered.

3
3. Open gate valve in
discharge line.
4. Turn pump on. If pump
runs and sump liquid does
not pump down, stop pump
and close discharge gate
valve. Then lift pump until
sealing flange is open to
vent off trapped air. Lower
pump, open discharge
valve and start the pump
again. If the pump is piped
in permanently, it may be
necessary to break union at
pump discharge to clear air.
5. If pump is three phase,
piped-in permanently,
and still does not operate
properly after venting,
rotation is wrong and can be
reversed by interchanging
any two line leads.
6. Level controls should be
set so that pump turns off
when level is about 2 inches
above inlet and turns on
when level is about 2 inches
above motor.
Pump
Maintenance
Axial Cutter Adjustment:
To maintain the proper face
clearance between the axial
cutter and the cutter ring, follow
this procedure:
1. Close gate valve at
pump discharge.
2. Turn off circuit breaker.
CAUTION: Never work on pump
unless power has been turned off.
3. Remove pump from sump.
4. Loosen jam nuts on set
screws located on top of
bearing housing.
5. Loosen set screws.
6. Tighten hex head capscrews
until axial cutter just drags
on cutter ring when radial
cutter is turned by hand.
7. Back off on hex screws
1/8 turn.
8. Tighten setscrews to lift
axial cutter for proper
face clearance.
9. Tighten jam nuts
on setscrews.
10. Again, turn radial cutter by
hand to determine if shaft
has any drag.
11. If there is still some drag,
repeat above steps and back
off hex screws further.
IMPORTANT: Be sure that
both hex screws are tightened
or loosened the same amount
and that the setscrews are tight
against the motor housing. Also,
remember that the setscrews
increase the clearance while
the hex screws decrease
the clearance.
Replacing Grinder Parts:
1. Close gate valve at
pump discharge.
2. Turn off circuit breaker.
3. Remove pump from sump.
4. Unscrew capscrews and
remove cutter ring retainer.
5. Unscrew hex head capscrews
and remove volute case.
Cutter ring can now be
removed from volute. Keep
both shims for reassembly
as necessary.
6. Radial cutter and axial
cutter are now exposed. If
checking for clogging, these
parts can now be cleaned
without removing them from
the shaft.
7. If necessary to replace
cutters, remove capscrew,
washer and radial cutter
from shaft. Radial cutter and
impeller are screwed onto
shaft. The thread is right-
hand. Tap radial cutter with
plastic hammer if necessary
to loosen. Axial cutter lifts
off impeller and is held from
rotating by pin. Unscrew
impeller from shaft in the
same manner as radial cutter,
and remove washer.
8. Clean all parts thoroughly
before proceeding with
the assembly. Make sure
spring pin is inserted into
impeller. Replace case but
do not replace grinder ring at
this point.
9. Loosen hex head capscrews
1/2 turn. Replace shims and
cutter ring and cutter retainer
ring. Now repeat steps 4
through 11 under Axial
Cutter Adjustment. It may
be necessary to loosen hex
head capscrews in pump case
and tap with a hammer to get
proper clearance on O.D. of
radial cutter.
10. Plug pump into power and
operate for a few seconds
only to be sure parts are
not rubbing.
Replacing Seals:
1. Remove pipe plug from
top of motor and from seal
chamber and drain out all
oil. The lower pipe plug
drains the seal housing
while the other drains the
motor housing. Check for
water in the oil drained from
motor chamber. If there is
some water in this oil, the

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pump must be completely
dismantled and the stator
dried out or replaced if the
resistance to ground is less
than 500,000 ohms after
drying. A hypot check of
1500 volts for 230 volt
motors and 2000 volts for
460 volt motors should
be performed.
2. Remove cutters, impeller
and pump parts as described
above under Replacing
Grinder Parts.
3. Remove socket head
capscrew in seal plate and
screw two of the screws into
the tapped back-off holes
to force seal plate from seal
housing. Pulling this plate
off will also force lower seal
from shaft. Remove lower
seal from seal plate.
4. Remove snap ring and pull
upper seal from shaft. It may
be necessary to use packing
hooks to remove seal. Use
a screwdriver to break the
upper stationary ceramic
seal ring so that it can be
removed easily.
CAUTION: Do not use any
old seal parts. Replace all parts
with new pieces. Mixing old
parts with new parts will cause
immediate seal failure.
5. When cleaning all parts
before replacement, check
to be sure sleeve bearing or
shaft is not worn. Be sure
all O-rings are in excellent
condition without cuts or
nicks, and replace them if
not in excellent condition.
Use O-ring lube to prevent
cutting at assembly.
6. Refill seal chamber and
motor chamber with oil.
Lay pump on side to fill
seal chamber. Do not fill
completely; allow about
1/2 inch below fill plug
so that there will be an air
space for expansion. Set
pump upright and replace
the upper drain plug in the
side before filling motor
chamber. Again fill so that
oil level is just over the top
of winding to allow air space
for expansion.
7. Use only Hydromatic
submersible oil in motor
chamber and seal chamber.
In an emergency, a high
grade transformer oil can
be used.
Replacing Motor Stator:
1. If necessary to replace stator,
completely dismantle pump
as described above.
2. Remove bearing housing
and shaft rotor assembly.
When cap and rotor are
removed, motor leads can
be disconnected through the
bearing cap bore. The leads
are connected with twist-on
wire nuts. Do not tape leads
when replacing stator as oil
will deteriorate the tape and
cause motor failure. Use only
twist on wire nuts.
3. If cord leads are burned,
it may be necessary to
replace power cord and cord
grip assembly.
4. Remove motor housing bolts
and lift off housing.
5. Remove stator screws and set
housing on hardwood blocks.
Bump housing up and down
on hardwood block to
loosen stator which should
drop out.
6. Thoroughly clean housing
and other parts and install
new stator.
7. Connect leads through
housing bore and tuck
leads back behind the stator
windings to prevent rubbing
on rotor. Use only twist-on
wire nuts to connect wires.
8. If the ball bearing is
rusted or feels rough
when turned, it should be
replaced. Remove hex head
capscrews, lockwashers,
retainer plate and pull the
bearing and rotor assembly
from the bearing cap.
Remove hex head capscrew
and washer and press the
bearing off the shaft. Install
the new bearing by pressing
on inner face only. Pressing
on the outer face will ruin
the bearing.
9. In reassembly replace any
O-rings that are defective.
Use Parker O-ring Lube
on all O-rings for easy
assembly and to prevent
cutting.
10. Completely reassemble and
fill with oil.
11. Always run pump for a
few seconds after assembly
work to be sure all parts
run smoothly and are
correctly adjusted before
replacing in sump. Check
again for correct rotation.
Pump should rotate
counterclockwise when
viewed from the suction.

5
NOTE: When applying power,
be sure the pump is restrained
from turning by holding the
pump at the motor housing, or by
clamping it in a holding xture.
CAUTION: Always keep hands
away from the pump cutter
area after the circuit breaker
is reconnected.
Pump
Troubleshooting
Below is a list of troubles and
their probable causes.
No liquid delivered.
1. Pump air bound
2. Discharge head too high
3. Pump or piping plugged
4. Wrong rotation
5. Speed too low
Insufficient liquid delivered.
1. Discharge head too high
2. Impeller or cutters partially
plugged or damaged
3. Wrong rotation
4. Incorrect diameter impeller
5. Speed too low
Insufficient discharge pressure.
1. Wrong rotation
2. Air or gases in liquid
3. Impeller damages
4. Incorrect impeller diameter
5. Speed too low
Pump overloads motor.
1. Wrong rotation
2. Specific gravity or viscosity
of liquid too high
3. Speed too high
4. Head lower than rating,
pumping too much liquid
5. Pump clogged
6. Defective bearings
7. Defective impeller
Pump is noisy.
1. Defective bearings
2. No axial clearance between
impeller and volute
3. No axial clearance between
cutter ring and axial cutter
4. No diametral clearance
between radial cutter and
cutter ring
If the cause of the trouble cannot
be determined and corrected as
outlined above, contact your
nearest factory representative.

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NSPG 200 Parts List
38
35
28
45203643
924
44
22
29
39
23
42
8
13
14
15
30
7
47
26
11
10
17 183 1 634 40 31 12 4 5 32 219
16
41
33
37
27
46
21
25
Item
No. Eng. No. Part Description Qty.
1 054010102 Head – Suction 1
2 054020112 Volute 1
3 070330122 Impeller 1
4 054050025 Cutter, Lower Radial 1
5 055060012 Cutter, Upper Axial 1
6 054070012 Cutter Ring, Stationary 1
7 054080102 Seal Housing 1
8 054090122 Motor Housing, GE Motor 1
054090142 Motor Housing, Emerson Motor 1
9 054100112 Bearing Cap, GE Motor 1
054100132 Bearing Cap, Emerson Motor 1
10 054040105 Seal Plate and Lower Bearing 1
11 054130011 Gasket 1
12 055700031 Impeller Washer 1
13 21573C104 Stator 1/200 Volt GE 1
21573C100 Stator 1/230 Volt GE 1
21573C101 Stator 3/200 Volt GE 1
21573C102 Stator 3/230/460 Volt GE 1
21573C103 Stator 3/575 Volt GE 1
14 Rotor and Shaft w/Bearing
108320175 1-Phase GE 1
108230225 3-Phase GE 1
15 003000001 Upper Shaft Seal 1
16 009750021 Snap Ring 1
17 049170011 Lower Seal, Rotating 1
18 049180011 Lower Seal Seat 1
19 064200001 Pin 1
20 134250741 Nameplate 1
21 131880001 Shim .005" AR
22 064210065 Cord Cap Assy, 25’ Single 1
23 000730011 Wire Connector, All 1-Phase and
200/575 Volt 3-Phase
3
000730011 230 Volt 3-Phase 4
000730011 460 Volt 3-Phase 6
24 001500081 O-ring, GE Motor 1
001500461 O-ring, Emerson Motor 1
25 05876A120 O-ring 1
26 001500291 O-ring 1
27 000190011 Screw 4
28 005170111 Capscrew 2
29 001010201 Capscrew 2
30 001010191 Capscrew 9
31 011300081 Impeller Screw 1
32 005170091 Socket Head Screw 3
33 000250091 Stator Screw, GE Motor 4
000250081 Stator Screw, Emerson Motor 4
34 000300131 Machine Screw 3
35 001140061 Hex Nut 2
36 045800011 Drive Screw 2
37 001770021 Lockwasher 4
38 000130071 Adjustment Screw 2
39 008340151 O-ring 1
40 001560291 Flat Washer 1
41 05454A009 Lock Washer 4
42 054140003 Brg Retainer Plate 1
43 071670011 Bearing 1
44 001560221 Flat Washer 1
45 19100A004 Capscrew 1
46 001560121 Flat Washer 1
47 001190081 Pipe Plug 2
517000597 Seal Kit 1
24709110000 Paraffinic Oil

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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, whichev
er
occurs first – provided that such products are used in compliance with the requirements of the Pentair Hydr
omatic
catalog and technical manuals for use in pumping raw sewage, municipal wastewater or similar, abrasive-fr
ee,
noncorrosive liquids.
During the warranty period and subject to the conditions set forth, Pentair Hydromatic, at its discretion, will r
epair
or replace to the original user, the parts that prove defective in materials and workmanship. Pentair Hydr
omatic
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/startupf
orm.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 cov
er
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 fr
eight
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, ac
cident
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 FO
R
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 DAMA
GE
MAY RESULT FROM IMPROPER INSTALLATION. PENTAIR HYDROMATIC DISCLAIMS ALL LIABILITY, INCLUDIN
G
LIABILITY UNDER THIS WARRANTY, FOR IMPROPER INSTALLATION. PENTAIR HYDROMATIC RECOMMEND
S
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.
1101 MYERS PARKWAY 490 PINEBUSH ROAD, UNIT 4
ASHLAND, OHIO 44805 CAMBRIDGE, ONTARIO, CANADA N1T 0A5
PH: 855-274-8947 PH: 800-363-7867
WWW.HYDROMATIC.COM