Pentair MYERS S33 Manual

VERTICAL
FLOAT SWITCH
S33V1 & S33V1C
AUTOMATIC
S33A1 & S33A1C
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 S33
SUMP PUMPS
INSTALLATION AND SERVICE MANUAL
Part # 23833A587 | © 2012 Pentair Pump Group, Inc. | 11/08/12

23833A587 11/08/12 2
WARNING: Risk of electric shock – This pump
is supplied with a grounding conductor and
grounding-type attachment plug. To reduce the risk
of electric shock, be certain that it is connected only
to a properly grounded, grounding-type receptacle.
This pump has not been investigated for use in
swimming pool areas. DO NOT WORK ON PUMP
UNTIL POWER IS UNPLUGGED. DO NOT cut off
ground pin or use an adapter fitting. DO NOT use
an extension cord. The pump power cord should be
connected to a separately fused, grounded 115 volt
line with a capacity of 15 amps. NEVER touch the
pump when it is connected to electrical power.
A CHECK VALVE MUST BE USED IN THE DISCHARGE
LINE FOR ALL PUMPS. A shut-off valve should be
used. Always install check valve with arrow on body in
direction of flow.
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.
AIR LOCKING
A sump pump is said to be air locked if water
traps air in the pump and it cannot get out, thus
preventing pump from operating.
All Myers sump pumps have a small air vent hole in
the impeller chamber to let out trapped air. If this
hole becomes plugged, pump may air lock. This
usually happens on pumps that are used mainly in
the wet seasons. In summer months,the pump may
be turned off as sump water dries up. When pump
is turned on again and water comes up in the sump,
the air will trap in pump if not vented.
AS A SECONDARY PRECAUTION IN INSTALLATIONS
OF THIS TYPE, EXAMPLE: 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.
1. Before installing or servicing your pump, BE
CERTAIN pump power source is disconnected.
2. Installation and electrical wiring must adhere to
state and local codes and must be complete before
priming pump. Check appropriate community
agencies, or contact local electrical and pump
professionals.
3. CALL AN ELECTRICIAN WHEN IN DOUBT. Pump
should be connected to a separate 15 amp circuit
breaker or 15 amp fuse block. Plugging into existing
outlets may cause low voltage at motor, causing
blown fuses, tripping of motor overload, or burned-
out motor.
4. A permanent ground connection from pump to the
grounding bar at the service panel is mandatory.
Myers sump pumps come with a grounding
conductor and a grounding type attachment plug.
Do not connect pump to a power supply until
permanently grounded. For maximum safety, ground
pump to a circuit equipped with a fault interrupter
device.
5. Voltage of power supply must match the voltage of
the pump. All Myers sump pumps are factory preset
to 115V, 60 Hz.
6. Before installing pump, clear sump basin of any
water, debris, or sediment.
WARNING: Sump basin must be vented in
accordance with local plumbing codes. Myers
sump pumps are not designed for and CANNOT be
installed in locations classified as hazardous in the
National Electric Code, ANSI/NFPA 70.
7. The sump basin should be between 14" and 18" in
diameter for the S33A1, S33P-1, S33A1C, S33PC-1,
S33M1C and 12"-18" for the S33V1, S33V1C,
S33PV1 made of plastic, fiberglass, or concrete.
8. The following may cause severe damage to pump
and will void warranty:
• Using the pump without a check valve.
• Using an extension cord.
• Cutting off the ground pin or using an
adapter fitting.
• Working on pump or switch while plugged in.
• Removing motor housing, unscrewing impeller, or
otherwise removing impeller seal.
• Running the pump continuously.
• Pumping chemicals or corrosive liquids.
• Pumping gasoline or other flammable liquids.
PERFORMANCE TABLE (in gallons per minute)
PUMP
MODEL
TOTAL HEAD (vertical pumping distance) IN FEET
6 8 10 12 14 16 18 20 22
S33 33 30 29 27 25 23 17 15 12
PIPING
Plastic PVC pipe is shown in the illustrations, but drain
hose, galvanized steel or copper pipe may be used if
desired. All piping must be clean and free of all foreign
matter to prevent clogging. Use thread compound on all
threaded joints unless specified otherwise.
9. Do not open pump housing to attempt repair. This
will cause a severe shock hazard.
10.Any finished basement or living area should be
equipped with a sump pump alarm to warn of a
pump failure and protect against water damage.
11.Cycle the pump at least once per month when
regular use isn’t occurring.

23833A587 11/08/12
3
12. Always use a properly installed check valve with this
sump pump.
COMPLETE SUBMERSIBLE SUMP
PUMP INSTALLATION
Be certain sump basin is clean and all power to pump
is shut off. If pump fails to operate properly after
installation, refer to the troubleshooting checklist on
page 4 or contact your Myers distributor. All parts with
part numbers are quality Myers parts.
Tools Needed for All Pump Installation:
Pipe wrench, slot screwdriver, hacksaw, round file, drill,
1/8" drill bit, pvc cement.
1. Thread male PVC adapter into pump discharge
opening.
2. Cement a 15" piece of PVC pipe to adapter. Use
appropriate diameter piping. Drill a 1/8" relief hole
in the pipe 5" above pump connection. This hole
prevents pump from air-locking.
3. Clamp check valve to top of 15" PVC pipe with
water flow arrow pointing away from pump.
4. Lower pump into basin. Clamp needed PVC
discharge pipe and fittings to open end of check
valve.
5. Fill sump basin with water and plug in pump.
Perform several ON-OFF cycles to assure
satisfactory operation.
STARTING PUMP – S33A (AUTOMATIC)
1. These pumps have an integral mechanical (mercury-
free) ball float switch. Vertical switch models have a
vertical actuated cylinder float.
2. Plug cord into a 115 volt GROUNDED
RECEPTACLE.
3. Run water into sump until pump starts.
4. Allow pump to operate through several ON-OFF
cycles to be sure operation is satisfactory.
5. If shut-off valve is used in discharge line, be sure
valve is open.
6. If pump does not operate properly, see trouble
service chart for remedy. NOTE: TETHER LENGTH
OF SWITCH CORD ON BALL FLOAT MUST BE
MINIMUM OF 3-5/8".
USING THE S33M SUMP PUMP FOR
MANUAL OPERATION
The pump cord for these units can be plugged directly
into proper GROUNDED RECEPTACLE for continuous
pump operation.
CAUTION: THIS TYPE OF OPERATION SHOULD BE
USED ONLY FOR EMERGENCY USE OR WHERE
A LARGE VOLUME OF WATER IS TO BE PUMPED,
SUCH AS FLOODED BASEMENT.
PUMP MUST NOT BE RUN CONTINUOUSLY OUT OF
WATER.
AUTOMATIC/MANUAL MODEL
The Model S33 sump pump can be changed from
one style, automatic or manual, to the other by
interchanging only the plug ends of the float control
with the manual plug. The ball floats must be tethered
with a cable clamp. DO NOT REMOVE THE MOTOR
CAP.
HOW MECHANICAL SWITCH
FLOAT OPERATES
This level control uses a mechanical switch sealed in a
polypropylene float cylinder. The switch is not position
sensitive; that is, it will operate regardless of position.
When level rises in the sump, the cylinder floats up with
the level. When the cylinder position is at an angle of
about 45˚, the steel ball rolls over a detent and actuates
the switch. This starts the pump motor.
As the sump level draws down, the cylinder floats down
and when it is again at an angle of about 45˚, the steel
ball drops away, deactivating the switch and the motor
stops.
BE SURE CYLINDER FLOATS FREELY IN SUMP BASIN
WITHOUT TOUCHING THE BASIN WALLS. ADJUST
PUMP POSITION IN SUMP IF NECESSARY.
CLEANING FLOAT
If pump becomes inoperative because of accumulation
of trash on the float, remove from sump and clean float.
1. Wipe all water and dirt from pump and float and also
the vertical rod on vertical models.
2. Be sure float operates freely after cleaning.
CLEANING IMPELLER AND VOLUTE CASE
1. Remove (3) screws that hold bottom plate to volute
case.
2. Remove (4) screws that hold volute case to metal
motor housing.
3. Use screwdriver to pry plastic case from metal
housing. Use care not to gouge groove in the
plastic. Pry in several spots to loosen.
4. Remove volute case and clean impeller and volute
passage.
5. Be sure impeller turns freely after cleaning.
6. Clean out holes in plastic pump base and wash
thoroughly before replacing.
7. DO NOT UNSCREW IMPELLER.

23833A587 11/08/12 4
CONDITION
Pump does not run or hum.
Refer to a., b., c., d., e. or f.
Pump runs but does not deliver water.
Refer to g., h., i., j., k. or l.
Pump runs and pumps out sump but
does not stop.
Refer to m.
Pump runs but delivers only small
amount of water.
Refer to i., j., k. or l.
Fuse blows or circuit breaker trips
when pump starts.
Refer to k., l., n. or o.
Motor runs for short time then stops.
Then after short period starts again.
Indicates tripping overload caused by
symptom shown.
Refer to k., l. or o.
PROBABLE CAUSE
a. Line circuit breaker may be off, or fuse, if used,
may be blown or loose.
b. Water level in sump may be too low. Run in more
water. Turn-on level is 12 to 13 inches above
sump bottom.
c. Pump cord plug may not be making contact in
receptacle.
d. If pump is using the series cord plug, the two
plugs may not be plugged tight together.
e. Float may be stuck. Be sure float operates freely
in basin.
f. If all symptoms check OK, motor winding may
be open. Take to service center for check.
g. Check valve may be installed backward. Arrow
on valve points in direction of flow.
h. Discharge shut-off valve, if used, may be closed.
i. Pump may be air locked. Start and stop several
times by plugging and unplugging cord. Check
vent hole in pump case for plugging.
j. Pump head may be too high. Pump cannot
deliver water over 18 ft. vertical. Horizontal
distance does not affect pumping, except loss
due to friction.
k. Inlet holes in pump base may be clogged.
Remove pump and clean out openings.
l. Impeller or volute openings may be plugged or
partially plugged. Remove pump and clean per
maintenance instructions.
m. Float is stuck in Up position. Be sure float
operates freely in basin.
n. Fuse size or circuit breaker is too small. Must be
15 amps.
o. Defective motor stator; return to Myers service
center.
CHECK LIST IF PUMP DOES NOT OPERATE PROPERLY

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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.
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.FEMYERS.COM WWW.FEMYERS.COM