Pentair hydromatic SK75/100 Installation And Operator's Manual

INSTALLATION AND

OPERATOR'S MANUAL

Submersible Sewage

Ejector Pump

INSTALLATION ET MANUEL

DE L'OPéRATEUR

Pompe submersible

d'eauxd'egout

Installation/Operation/Parts

For further operating, installation, or
maintenance assistance:

Call 1-888-957-8677

English ..........Pages 2-13

293 WRIGHT STREET, DELAVAN, WI 53115 WWW.HYDROMATIC.COM
PH: 888-957-8677

269 TRILLIUM DRIVE, KITCHENER, ONTARIO, CANADA N2G 4W5
PH: 519-896-2163

© 2013 Pentair, Ltd. All Rights Reserved. W-03-252 (Rev. 03/04/13)

SK75/100

Installation/Fonctionnement/Pièces

Pour plus de renseignements concernant
l’utilisation, l’installation oul’entretien,

Composer le 1 [phone]

Français ........Pages 14-26

Safety 2

Contents

Important Safety Instructions .......................2

Installation .......................................3

Operation ........................................5

Maintenance ......................................5

Resistance Checks ................................ 6

Reassembly ...................................... 7

Oil fill ........................................... 8

Troubleshooting ..................................9

Repair Parts .....................................10

Warranty .......................................12

Product Specifications ............................13

Important Safety Instructions

SAVE THESE INSTRUCTIONS - This manual contains
important instructions that should be followed during
installation, operation, and maintenance of the product.
Save this manual for future reference.

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!

indicates a hazard which, if not avoided, will

result in death or serious injury.

indicates a hazard which, if not avoided,

could result in death or serious injury.

indicates a hazard which, if not avoided,

could result in minor or moderate injury.
NOTICE
The manufacturer cannot anticipate every possible

circumstance that might involve a hazard. The warnings
in this manual, and the tags and decals affixed to the unit
are, therefore, not all-inclusive. If you use a procedure
or operating technique that the manufacturer does not
specifically recommend, you must satisfy yourself that it
is safe for you and others. You must also make sure that
the procedure or operating technique that you choose
does not render the system unsafe.

addresses practices not related to personal injury.

Electrically powered sewage pumps normally give many
years of trouble-free service when correctly installed,
maintained, and used. However, unusual circumstances
(interruption of power to the pump, large solids in
the sump, flooding that exceeds the pump’s capacity,
electrical or mechanical failure in the pump, etc.) may
prevent your pump from functioning normally. To prevent
possible damage, consult your dealer about installing a
secondary sewage pump or a high water alarm.

See Troubleshooting in this manual for information
about common sewage pump problems and remedies.
For more information, see your retailer, call Hydromatic
customer service at 1-888-957-8677 or visit our web site
at hydromatic.com.

Hazardous voltage - risk of electrical
shock. Shock can cause serious injury or death.
Failure to follow the warnings below can result in fatal
electricshock.

Burn Hazard.
temperatures. Do not touch an operating motor. To do so
can cause personal injury.

Risk of flooding. If a flexible discharge hose
is used, pump may move around in sump when motor
starts. If it moves far enough so that the switch hits the
side of sump, the switch may stick and prevent the pump
from starting. Make sure the pump is secured so it cannot
move around in the sump.

Motors can operate at high

Safety • Installation 3

Hazardous pressure and gas - risk of

explosion and personal injury. Failure to follow the

warnings that follow can result in personal injury.

1. If your basement has water or moisture on the floor,
do not walk on the wet area until all the power
has been turned off. If the shut-off box is in the
basement, call the electric company or the hydro
authority to shut off the service to the house, or call
your local fire department for instructions. Do not
handle the pump or pump motor with wet hands or
when standing on wet or damp surfaces.

2. Connect only to a properly grounded receptacle.

3. All wiring should be performed by a
qualifiedelectrician.

4. Protect the electrical cord from sharp objects, hot
surfaces, oils, and chemicals. Observe the Cord Lift
Warning shown below.

5. Risk of explosion and hazardous gas. Septic
tank must be vented in accordance with local
plumbingcodes.

Do not smoke or use sparkable electrical devices or

flame in a septic (gaseous) or possible septicsump.

If a septic sump condition exists and if entry into

sump is necessary, then (1) provide proper safety
precautions per OSHA requirements and (2) do
not enter sump until these precautions are strictly
adhered to.

Do not install pump in location classified as

hazardous per N.E.C., ANSI/NFPA 70- 2001.

6. Know the pump application, limitations and
potential hazards.

7. Wear safety glasses at all times when working with
the pump.

Keep the work area clean, uncluttered and properly

8.
lighted - secure all unused tools and equipment.

9. Keep visitors at a safe distance from working area.

10. Make the workshop child-proof - with padlocks,
master switches, and by removing starter keys.

11. Release all pressure within the system before
servicing any component.

12.

Provide a means of pressure relief for pumps whose
discharge line can be shut-off or obstructed.

13. Periodically inspect the pump and system
components. Perform routine maintenance
asrequired.

14. Drain all the liquid from the system beforeservicing.

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.

Installation

Thank you for purchasing this Hydromatic® pump. To
help ensure years of trouble-free operation, please read
the manual carefully.

Before installation, check your local electrical and
plumbing codes. Typical sewage pump installations are
shown on the next page.

WARNING

Risk of electrical shock.
Can burn or kill.
Do not lift pump by

powercord.

Cord Lift Warning

Risk of electrical shock and fire.

1. Attempting to lift or support the pump by
the power cord can damage cord and cord
connections, expose bare wires, and cause
a fire or electrical shock.

2. Use handle on top of pump for all lifting or
lowering of pump. Disconnect the power
to the pump before doing any work on it
or attempting to remove it from the pit.

3. Lifting or supporting the pump by the
power cord will void the warranty.

Installation 4

Typical Simplex Installation

Typical Duplex Installation

Installation • Operation • Maintenance 5

Follow these guidelines for installation:

1. Provide properly sized pit (see Specifications) on
sewage tank. Minimum pump run time is two
minutes. For maximum pump life, three minutes
isrecommended.

2. Make sure sump is free of string, cloth, nails, gravel,
etc. before installing pump.

3. Do not set pump directly on the bottom of sump pit
if it is not solid. Raise the pump by using bricks or
concrete blocks underneath it.

4. Do not remove ground pin from electrical plug.

5. Do not use an extension cord to operate thispump.

6. For proper automatic operation, make sure the pump
power cord is plugged into the piggyback receptacle
on the switch cord. Three phase models must be
properly connected to a suitable controlpanel.

Do not cut, crimp, or bend single phase switch

power cord. The vent tube needs to “breathe” for
proper operation of switch. This may cause pump
failure and void warranty.

7. Use steel or plastic pipe for all connecting lines
between pump and sewer outlet.

NOTICE: Some city regulations do not

allow installing a pump with plastic pipe.
Checklocalregulations.

8. Use PTFE pipe thread sealant tape on pipe
connections. Do not use ordinary pipe joint
compound on plastic pipe or pump. Pipe joint
compound can attack plastics and damage pump.

9. In applications where the pump may sit idle for
months at a time, it is recommended that the
pump(s) be cycled every month to ensure the
pumping system is working properly whenneeded.

10. A check valve should be installed horizontally in the
discharge pipe.

11. The optional Hydromatic Q Alert is an audible
alarm system for high water conditions. It should be
installed in every sump for greater protection.

NOTICE: Q Alert is for indoor use only. Other

Q Alarm and control panels are available for
outdoor use. Contact your Hydromatic distributor
forapplications.

12. Use pump partially or completely submerged for
pumping waterlike liquids. The pump will pump
solid materials up to 2” (spherical) in diameter. This
pump has not been investigated for use in swimming
pool areas.

Risk of fire. Do not pump flammable

liquids. Strong chemicals or salt water should not
be pumped without consulting your Hydromatic
distributor for proper seals and coatings.

Operation

NOTICE: Do not allow pump to run in a dry sump.
Doing so will void the warranty and may damage
thepump.

An automatic overload protector in the motor will
protect the motor from burning out due to overheating/
overloading. When the motor cools down, the overload
protector will automatically reset.

If overload trips frequently, check for the cause. It could
be a stuck impeller, wrong/low voltage, or electrical
failure in motor. If an electrical failure in the motor is
suspected, have it serviced by a competent repairman.

Maintenance

Read the following instructions carefully before replacing
any parts. Reasonable care and safe methods should be
practiced. Check local codes and requirements before
installation. Only a competent plumber or electrician
should make the installations.

Submerge pump in a disinfectant solution (dilute chlorine
bleach) for at least one hour before disassembling pump.

Check for an obstruction in the impeller by looking
through the suction hole of the pump. The shaft should
turn freely if unobstructed. Keep fingers, clothing or any
material from suction inlet.

The steps described in this section should be performed
only by an authorized service center.

NOTICE: Read all directions before replacing any
parts. Always remove pump from power source
beforeservicing.

The numbers in parentheses, such as "(3)" or "(16)", refer
to item numbers used on the Repair Parts diagram.

Maintenance 6

Using an ohmmeter

To be sure wires are not burned off or broken, use an
ohmmeter to perform resistance checks. Set ohmmeter
scale to RX1 scale and check meter by putting both
meter leads together and adjusting the needle knob until
meter reads zero. If meter cannot be adjusted to zero, the
batteries in meter must be replaced.

NOTICE: Always reset meter to zero [0] when going to a
new scale before making any measurements.

If wire is OK, meter needle will go to near zero and stay
there. If meter needle does not move, the wire has an
open and the wire must berepaired orreplaced.

Resistance Checks

1. For single phase (1ø) pumps, attach one meter lead
to the white cord wire of the power cord and the
other meter lead to the black cord wire. This reading
should match the resistance shown in Winding
Resistance Chart, 1ø, 230V.

Model Start Winding Run WInding Total

SK75 6.63 Ω 3.06 Ω 9.69 Ω

SK100 8.57 Ω 2.35 Ω 10.92 Ω

Winding Resistance Chart, 1ø, 230V

For three phase (3ø) pumps, repeat the above

procedure for white and red wires as well as red
and black wires. Each of the three separate readings
should read approximately the same and should
match the resistance shown in Winding Resistance
Chart, 3ø. If no resistance is obtainable for any of the
three phases, either a wire is broken, there is a bad
connection or the winding is defective. Skip Steps 5
and 8 if resistance is OK.

200V 230V 460V 575V

Model

SK75,

SK100

Any one

phase

7.31 Ω 9.66 Ω 38.65 Ω 60.39 Ω

Winding Resistance Chart, 3ø

2. Remove plug (3) from top of housing (4) and pour
oil into a clean glass container. If oil is clear, it
will indicate motor is not burned and there has
been no water leak into the motor. If oil is black,
it will indicate a burned stator. If oil is cloudy, it
will indicate water in motor oil, so all seals should
bereplaced.

Any one

phase

Any one

phase

Any one

phase

3. After draining oil, remove the hex head cap screws
(7) that attach motor housing (4) to volute (11).
Slide motor housing upward 5 to 6 inches in order
to expose power cord wire connections to motor
(5). Disassemble power cord wire connections from
motor and then disassemble power cord from motor
housing. Using the wire leads from the motor, check
the winding resistance with anohmmeter.

For Single Phase (1ø)

4. Attach one meter lead to the white cord wire and the
other meter lead to the black cord wire. See Winding
Resistance Chart, 1ø, 230V for an appropriate
resistance reading. Repeat this procedure for the
black cord wire and red lead wire. This reading is the
start winding resistance. Also repeat this procedure
for the white cord wire and the red cord wire. This
reading is the total motor winding resistance. If no
resistance is obtainable for either the start or main
winding, either there is a bad connection or the
winding isdefective.

For Three Phase (3ø)

5. Twist the three leads of one end of the power cord
together. Then at the other end, with an ohmmeter,
check any two leads. Check the third lead with either
of the first two. If a zero reading is indicated for
any wire, the wire is broken and a new power cord
assembly must be installed.

6. Ground check on stator should be performed using
ohmmeter with scale set to R X 100K. Connect one
meter lead to one lead of the stator and touch the
other meter lead to the housing (4). If the resistance
to the ground is less than 500,000 ohms, there is
moisture in the winding or leakage through stator
insulation. The stator must be dried out and then
rechecked on the ohmmeter. If the resistance is still
less than 500,000 ohms after drying, the stator must
be replaced. A zero reading indicates a direct short,
and the stator will have to be replaced.

Maintenance 7

7. If the wiring is grounded and there is no apparent
moisture in the oil (see step 2), the stator must be
checked with a high pot tester.

Shock Hazard. Due to the high voltage,

use extreme care when using the high pot tester.
A dangerous shock can be avoided with careful
handling of the test probes.

Using a voltage of 1500 volts for 115 volt motors

and 2000 volts for 230 volt motors, touch one
probe to the white lead and the other probe to the
stator laminations for only one second. Buzzing
will indicate arcing is occurring at a breakdown of
insulation or a small amount of moisture is present.
The stator will then have to be dried out or replaced.

The high pot test is very destructive. So, each time

the same stator is checked, the voltage should be
lowered about 250 volts. If not, you may cause the
stator to short by breaking down the insulation.

8. Repeat step 4, this time attaching the meter leads
to the stator wires. If a zero reading is obtained, the
winding is defective and the stator must bereplaced.

9. Remove the impeller screw and impeller washer,
then unscrew the impeller (10). Hold the rotor/
shaft assembly with a screwdriver and carefully tap
impeller with a plastic or rubberhammer.

10. Remove the flat head machine screw from seal plate
(9). Remove clamp ring (8) and motor housing (4) off
the seal plate (9).

11. Remove the four hex head stator bolts and lift the
stator from the seal plate (9). A screwdriver can be
inserted under the stator shell in order to remove
thestator.

12. Bump the end of the shaft with a plastic hammer.
This will push the rotating half of the mechanical
seal (14) from the shaft and also push the lower
bearing from the seal plate (9). Now remove the
shaft, rotor and bearing assembly from the seal
plate(9).

13. If water is found in the oil, both the rotating and
stationary halves of the mechanical seal (14) must be
replaced. Remove the stationary seal half by inserting
a screwdriver into seal plate (9) from the top and
tapping lightly with ahammer.

14. Turn the bearing by hand: if it feels rough when
turned or looks rusted, it should be replaced. Use a
bearing puller to remove the bearing.

Reassembly

1. Thoroughly clean the seal (14) and bearing pockets
in the volute. All sand and dirt must beremoved.

2. If the stationary seal half was removed, coat the
replacement stationary seal half with O-ring lube
and use a plastic pusher to press it into the motor
housing (4). Make sure the rubber ring goes in first.
Do not use any sharp objects that may damage
theseal.

3. When installing a replacement bearing, press only
on the inner face and make sure the bearing is flush
against the snap ring. If a press is not available, the
bearing can be tapped onto the shaft using a sleeve
that bears only on the inner face. Pressing on the
outer face will ruin the bearing.

NOTICE: Never pound on the outer face of the

bearing as this will cause bearing damage.

4. Push the shaft, rotor and ball bearing assembly
into the seal plate (9), being careful not to chip the
ceramic of the stationary seal half.

5. Replace the motor (5) if it is visibly burned or if the
ground resistance test or the winding resistance test
has failed. Note that the replacement stator must be
of the same manufacture as the existing rotor or vice
versa. Replace the four stator bolts.

6. Coat the rubber ring on the rotating seal half with
O-ring lube and press the seal onto the shaft with the
rubber ring facing the impeller (10).

NOTICE: Mixing old and new seal parts will cause

immediate seal failure. When replacing seal, replace
both the rotational and the stationary sealhalves.

Maintenance 8

7. Attach clamp ring (8) to seal plate (9) and secure
with machine screws.

8. Install impeller (10) onto the pump shaft. On 3ø
models fasten the impeller washer with the impeller
screw to the pump shaft.

9. Turn impeller (10). It should turn freely with nodrag.

10. Place motor/seal plate assembly into the volute
case(11).

11. Place the new O-ring (6) over the seal plateshoulder.

12. Clean motor housing assembly and connect power
cord into cord entry of motor housing.

13. Connect power cord wires to motor connections and
then slide motor housing assembly overmotor.

14. Secure motor housing to volute case with three hex
head screws (7).

15. Reach in the eye of the volute (11) and turn impeller
(10) again. It should turn freely with nodrag.

16. Before filling the motor housing with oil, a seal leak
test should be performed. Apply 7 to 8pounds of
air pressure in the 1/4" NPT tap (3) on the top of the
motor cover and seal chamber.

NOTICE Too much pressure will damage the seal.

Seal would have to be replaced.

Then submerge the pump in water and check for

leaks. If a leak occurs, isolate where it is coming
from and correct the problem by replacing the
failedpart.

7. Hydromatic pumps have a small air vent hole in
the impeller cavity to let out trapped air. If this hole
becomes plugged, pump may air lock. To break the
air lock, use a small screwdriver to clear hole in the
impeller cavity.

As a secondary precaution in installations of this

type, an 1⁄8” hole should be drilled in the discharge
pipe just above the volute. The check valve should
be at least 12inches above pump discharge. Do
not put check valve directly into pump discharge
opening.

NOTICE In sumps where the pump is operating

daily, air locking rarely occurs.

Oil fill

1. After seal leak test is satisfactory, remove unit from
water and wipe or blow off any excess water.

2. Do not put oil in motor with any water present in
motor cavity.

3. Use refined paraffinic transformer oil, ¹Shellflex™
2210 or equivalent.

¹ Shell Oil Company, Texas

4. Slowly fill oil to 1/8" over windings in motor housing
through opening (3). Use an oil fill tube that will go
into holes so that air can escape. Replace plug (3).

NOTICE Do not fill the motor housing completely –

allow air space for expansion.

5. Connect power cord wires to terminals in panel, or
connect power source, and check pump running.
Motor should run smoothly and be free of vibration.
Pump is ready for operation.

Troubleshooting 9

Troubleshooting

kill. Disconnect power before attempting any service or
repair work on pump.

Symptom Possible Cause(s) Corrective Action

Motor not running

Pump runs continuously

Little or no effluent
delivered from pump

Pump cycles constantly

Hazardous voltage. Can shock, burn, or

Motor protector tripped.

Open circuit breaker or blown fuse.

Impeller clogged or binding.

Power cable damaged.

Bad control panel. Inspect control panel wiring. Call a licensed electrician.

Defective liquid level switch.

Not enough liquid in wet well to activate
controls.

Liquid level cords tangled Untangle cords for free operation.
Automatic controls defective Try running pump in manual mode. If it runs, the automatic control is at fault.
Liquid level control cords tangled Untangle cords for free operation.

Pump is airlocked.

Flow in matches or exceeds the pump’s
capacity.

Check valve plugged, stuck shut, or
installed backwards.

System head excessive. Consult dealer.
Pump suction plugged. DISCONNECT POWER, pull pump, inspect, and clear as needed.

Wrong voltage or not wired correctly.

Pump is air locked.

Worn or damaged impeller. DISCONNECT POWER, pull pump and inspect impeller. Replace if necessary.
Liquid level controls incorrectly installed

or defective.
No discharge check valve installed. Install discharge check valve.
Discharge check valve stuck open. Repair or replace check valve as necessary.
Sewage wetwell too small. Consult dealer.
Liquid level controls incorrectly installed

or defective.
Pump too small for inlet flow. Consult dealer about larger pump or second pump.

which can cause loss of fingers. Keep hands away from
pump suction inlet when working on or servicing pump.

Allow motor to cool. Make sure pump is completely submerged. Clear debris from volute
and impeller. Check for high amp draw.

Replace fuse or reset breaker. If circuit breaker opens repeatedly, don’t reset it - call a
licensed electrician.

Check amp draw. If it is more than twice the nameplate amps, the impeller is locked.
Bearings and shaft may be damaged. DISCONNECT POWER, clear debris from volute,
impeller, and cutter as needed.

Resistance between power cable and ground should be infinity. If any reading is less than
infinity, call a licensed electrician.

With switch disconnected from power, check continuity through switch while activating
liquid level switch. Replace switch if necessary.

Allow the liquid to rise several inches above the switch-on level.

Stop pump for about one minute, then restart. Repeat stopping and starting until the
airlock clears. If the airlock persists, DISCONNECT POWER, pull the pump and drill a
1/8” hole in the discharge pipe between the pump discharge and the check valve.

A larger pump or more pumps may be needed.

Make sure check valve is installed correctly (flow arrow should point away from pump)
and functioning correctly.

Check pump’s rotation; check nameplate voltage against supply voltage (they must
match); consult a licensed electrician.

Stop pump for about one minute, then restart. Repeat stopping and starting until the
airlock clears. If the airlock persists, DISCONNECT POWER, pull the pump and drill a
1/8” hole in the discharge pipe between the pump discharge and the check valve.

Reposition or replace as necessary.

Reposition or replace as necessary.

Hazardous impellers and unexpected starts