Sta-Rite EC650120M Installation Manual

EC6, EC7, EH7, HT7, SC7, SCC7,

SC9, SCC9, and EC9 Series

Submersible Effluent &
Sewage/Solids Handling Pump

INSTALLATION, OPERATION, & PARTS MANUAL

SAFETY INFORMATION

Carefully read and follow all safety instructions in this
manual or on pump.

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!

warns about hazards that will cause serious

personal injury, death or major property damage if ignored.

warns about hazards that can cause serious

personal injury, death or major property damage if ignored.

warns about hazards that will or can cause

minor personal injury or property damage if ignored.

The word NOTICE indicates special instructions which are
important but not related to hazards.

NOTICE: Pump must be installed in a vertical position only.
Installing pump in any other position will void warranty.

1. To avoid serious injury and/or property damage, read
these rules and instructions carefully.

2. Check your local codes before installing.You must com­ply with their rules.

3. Vent sewage or septic tank according to local codes.

4. Do not install pump in any location classified as haz­ardous by National Electrical Code, ANSI/NFPA
70-1984.

5. Pump normally runs hot. To avoid burns when servicing
pump, allow it to cool for 20 minutes after shut-down
before handling it.

6. Do not run pump dry. Dry running can overheat pump
and will void warranty.

7. Pump is permanently lubricated. No oiling or greasing is
required in normal operation. For overhaul, see instruc­tions under "Service", Page 4.

Hazardous voltage. Can shock, burn, or

cause death. During operation the pump is in water.To

avoid fatal shocks, proceed as follows if pump needs
servicing:

8A Ground pump according to all applicable codes and

ordinances.

8B. Disconnect power to outlet box or circuit breakers before

servicing.

8C. To reduce risk of electric shock, take care when changing

fuses or resetting circuit breakers. Do not stand in water
when working on control box or with circuit breakers.

Single Phase Pumps:

8D. When using cord and plug, plug into a grounded outlet

only. When wiring to a system control, connect pump
ground lead to system ground.

Three Phase Pumps:

Risk of electrical shock. Do not remove

cord and strain relief. Do not connect conduit to pump.

8E. Three phase pumps are intended for permanent connec-

tion only. Provide strain relief at control box for power
supply cord connection to box. All control components
must be UL listed and suitable for end use application.
Only qualified personnel should install the pump and
associated control equipment.

DESCRIPTION

These pumps are designed for sewage, effluent and waste
water removal, sump drainage, liquid transfer systems, cir­culation, dewatering and flood control. Pump motors range
from a 115V or a 230V single phase to a 208-230V or 460V
three phase. All models come with a 20’ 3-prong grounding
type cord and plug.

Models SC7, SCC7, SC9 and SCC9 are rated for continu­ous duty when fully submerged in a liquid with a maximum
temperature of 105° F (40.5° C).

The maximum liquid temperature for all models, except
HT750120T (high temperature) is 130°F (55°C). The maxi­mum liquid temperature for HT750120T is 200°F (93.3°C).

NOTICE: This unit is not designed for applications involving
salt water or brine! Use with salt water or brine will void
warranty.

© 2007 S505 (Rev. 8/20/09)

293 Wright Street • Delavan, WI 53115

2

Max. Individual Discharge Switch Setting

Model Motor Load Branch Circuit Adapter in inches (mm)

Number HP Volts Phase Amps Required (Amps) Size (inches)

On Off

EC650120M 1/2 115 1 12.0 15 2
EC650120T 1/2 115 1 12.0 15 2 18.1(460) 9.1(231)
EC750120M 1/2 115 1 13.0 15 2
EC750120T 1/2 115 1 13.0 15 2 18.1(460) 9.1(231)
EC7100220M 1 230 1 6.6 10 2
EC7100220T 1 230 1 6.6 10 2 18.1(460) 9.1(231)
EC7100520M 1 575 3 2.7 6 2
EH750120M 1/2 115 1 12.0 15 2
EH750120T 1/2 115 1 12.0 15 2 18.1(460) 9.1(231)
EH7100220M 1 230 1 8.7 10 2
EH7100220T 1 230 1 8.7 10 2 18.1(460) 9.1(231)
SCC750120T 1/2 115 1 11.2 15 3 20(508) 11(279)
SC750120M 1/2 115 1 11.2 15 2
SC750120T 1/2 115 1 11.2 15 2 20(508) 11(279)
SC750220M 1/2 230 1 5.5 10 2
SCC775120T 3/4 115 1 12.0 15 3 20(508) 11(279)
SC775120M 3/4 115 1 12.0 15 2
SC775120T 3/4 115 1 12.0 15 2 20(508) 11(279)
SCC775220T 3/4 230 1 6.7 10 3 20(508) 11(279)
SC775520M 3/4 575 3 1.8 6 2
HT750120T 1/2 115 1 12.0 15 2 17.8 (452) 8.8 (224)

Full Individual Branch Dischagee

Model Motor Load Circuit Required Adapter

Number HP Volts Phase Amps (Amps) Size (inches)

SC975220T, SCC975220T**** 3/4 230 1 7.5 10 2,3
SC975220M, SCC975220M 3/4 230 1 7.5 10 2,3
SC975320M, SCC975320M 3/4 208-230 3 8.0 10 2,3
SC975420M, SCC975420M 3/4 460 3 4.0 10 2,3
SC9100220M, SCC9100220M 1 230 1 8.5 15 2,3
SC9100220T, SCC9100220T**** 1 230 1 8.5 15 2,3
SC9100320M, SCC9100320M 1 208-230 3 8.5 15 2,3
SC9100420M, SCC9100420M 1 460 3 4.1 10 2,3
SCC9100520M 1 575 3 3.5 6 3
SC9150220M, SCC9150220M 1-1/2 230 1 12.0 15 2,3
SC9150320M, SCC9150320M 1-1/2 208-230 3 9.0 15 2,3
SC9150420M, SCC9150420M 1-1/2 460 3 4.7 10 2,3
SCC9150520M 1-1/2 575 3 3.8 6 3
SC9200220M, SCC9200220M 2 230 1 13.0 15 2,3
SC9200320M, SCC9200320M 2 208-230 3 10.0 15 2,3
SC9200420M, SCC9200420M 2 460 3 5.3 10 2,3
SCC9200520M 2 575 3 4.2 10 3
EC9200220M 2 230 1 11.0 15 2
EC9200320M 2 208-230 3 7.5 10 2
EC9200420M 2 460 3 3.8 6 2

SPECIFICATIONS – EC6, EC7, EH7, HT7, SC7, SCC7 SERIES

SPECIFICATIONS – SC9, SCC9, EC9 SERIES

GPM AT TOTAL FEET

Model 10 20 30 40 50 60 70 80

CAPACITY GALLONS/MINUTE

EC650120M 90 75 60 35 – – – – 50
EC650120T 90 75 60 35 – – – – 50
EC750120M 110 95 80 60 35 – – – 59
EC750120T 110 95 80 60 35 – – – 59
EC7100220M 100 95 90 80 65 40 9 – 72
EC7100220T 100 95 90 80 65 40 9 – 72
EC7100520M 100 95 90 80 65 40 9 – 72
EH750120M 60 60 60 55 50 30 5 – 71
EH750120T 60 60 60 55 50 30 5 – 71
EH7100220M 62 62 62 62 60 50 40 20 89
EH7100220T 62 62 62 62 60 50 40 20 89

No flow

at height

shown

below

GPM AT TOTAL FEET

Model 10 20 30 40

CAPACITY GALLONS/MINUTE

SCC750120T 100 40 – – 26
SC750120M 100 40 – – 26
SC750120T 100 40 – – 26
SC750220M 100 40 – – 26
SCC775120T 115 60 – – 28
SC775120M 115 60 – – 28
SC775120T 115 60 – – 28
SCC775220T 115 60 – – 28
SC775520M 115 60 – – 28
HT750120T* 65 60 50 30 48

No flow

at height

shown

below

PERFORMANCE – EC6, EC7, EH7, HT7, SC7, SCC7 SERIES

**** Model numbers ending in “T” include Float Switch model number PW217-224. Float Switch PW217-224 turns on at 22” and turns off at 13”.

* Flows are for 200° F water temperature.

INSTALLATION

Risk of electrical shock. Can burn or kill.

Do not lift pump by power cord. See “Cord Lift Warning” on
Page 5.

NOTICE: Install pump on a hard, level surface (cement,
asphalt, etc.). Never place pump directly on earth, clay or
gravel surfaces. Basin must be at least 18’’ (457 mm) in
diameter and 30’’ (762 mm) deep.

Piping:

Piping must not be smaller than pump discharge.
When installed in a sewage system, pipe must be capable of

handling semi-solids of at least 2’’ (51mm) diameter.
When installed in an effluent system, pipe must be capable

of handling semi-solids of at least 3/4’’ (19 mm) diameter.
The rate of flow in the discharge pipe must keep any solids

present in suspension in the fluid. To meet minimum flow
requirements of 2 ft. per second (61 cm/sec) in discharge
line, size pipe as follows:

A Pipe Size Of: Will Handle a Flow Rate Of:

2’’ (51 mm) 21 GPM (79.5 L/M)
2-1/2’’ (64 mm) 30 GPM (113.5 L/M)
3’’ (76 mm) 48 GPM (182 L/M)

In a sewage system use a 2’’ (51 mm) min. check valve in
pump discharge to prevent backflow of liquid into sump
basin. The check valve should be a free flow valve that will
easily pass solids. Be sure check valve installation complies
with local codes.

In an effluent system use a 1-1/2’’ (38 mm) min. check valve
in pump discharge to prevent backflow of liquid into pump
basin. The check valve should be a free flow valve that will
easily pass solids. Be sure check valve installation complies
with local codes.

NOTICE: For best performance of check valve when handling
solids, do not install it with discharge more than 45° above the
horizontal. Do not install check valve in a vertical position as
solids may settle in valve and prevent opening on startup.

Drill a 3/16’’ (5 mm) hole in discharge pipe about 1 to 2’’
(25-50 mm) above pump discharge connection (but below
check valve) to prevent airlocking the pump.

Electrical

Hazardous voltage. Can shock, burn, or

cause death. When installing, operating, or servicing this

pump, follow safety instructions below.

1. DO NOT splice the power cord, submerge electrical cord

plug, or use extension cords.

2. DO NOT handle or service pump while it is connected to

power supply.

3. DO NOT operate pump unless it is properly grounded.

Wire pump directly into grounded terminal block in auto­matic float or pump controller box. Power cord on 1-phase
units is a 3-wire conductor with 3-prong grounding-type
plug. Do not modify cord or plug. When using with plug-in
receptacle, plug pump into a 3-wire, grounded, grounding­type receptacle only. Connect pump according to all
applicable codes.

For automatic operation, plug or wire pump into an automatic
float switch or pump controller. For continuous operation,
plug directly into an electrical outlet or wire directly into
switch box. Connect pump to its own individual branch circuit
with nothing else on the circuit. See Specifications Chart
(Page 2) for fuse or circuit breaker sizes.

Risk of electrical shock and fire. Be sure
that power supply information (Voltage/Hertz/Phase) on
pump motor nameplate matches incoming power supply
exactly. Install pump according to all electrical codes
that apply.

Models with an automatic float switch are factory set with a 4’’
tether length. This tether length can be adjusted to accom­modate a variety of pumping ranges. (See performance graph,
Page 4). The installer must ensure that the switch does not
become obstructed and that the range is set so the liquid level
remains a minimum of 2’’ above pump suction at the lowest
level, and below the basin inlet pipe at the highest level.

Overloads - Single Phase

In single-phase units, an automatic overload protector in the
motor will protect motor from burning out due to overheating/
overloading. When motor cools down, protector automatically
resets and start motor.

If overload trips frequently, check for 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.

3

PERFORMANCE
SC9, SCC9, EC9 SERIES

GPM AT TOTAL FEET

Model 10 20 30 40 50 60 70

CAPACITY GALLONS/MINUTE

SC975220T 160 105 – – – – – 29
SCC975220T 160 105 – – – – – 29
SC975220M 160 105 – – – – – 29
SCC975220M 160 105 – – – – – 29
SC975320M 160 105 – – – – – 29
SCC975320M 160 105 – – – – – 29
SC975420M 160 105 – – – – – 29
SCC975420M 160 105 – – – – – 29
SC9100220M 185 140 80 – – – – 38
SCC9100220M 185 140 80 – – – – 38
SC9100220T 185 140 80 – – – – 38
SCC9100220T 185 140 80 – – – – 38
SC9100320M 185 140 80 – – – – 38
SCC9100320M 185 140 80 – – – – 38
SC9100420M 185 140 80 – – – – 38
SCC9100420M 185 140 80 – – – – 38
SCC9100520M 185 140 80 – – – – 38
SC9150220M 215 175 120 40 – – – 43
SCC9150220M 215 175 120 40 – – – 43
SC9150320M 215 175 120 40 – – – 43
SCC9150320M 215 175 120 40 – – – 43
SC9150420M 215 175 120 40 – – – 43
SCC9150420M 215 175 120 40 – – – 43
SCC9150520M 215 175 120 40 – – – 43
SC9200220M 230 190 150 100 30 – – 54
SCC9200220M 230 190 150 100 30 – – 54
SC9200320M 230 190 150 100 30 – – 54
SCC9200320M 230 190 150 100 30 – – 54
SC9200420M 230 190 150 100 30 – – 54
SCC9200420M 230 190 150 100 30 – – 54
SCC9200520M 230 190 150 100 30 – – 54
EC9200220M 145 142 130 110 95 75 42 80
EC9200320M 145 142 130 110 95 75 42 80
EC9200420M 145 142 130 110 95 75 42 80

No flow

at height

shown

below

Control Panel Overload Adjustment –
Three Phase

NOTICE: Control panel not provided with pump. See control

panel installation and operating instructions before adjusting
overload setting.

For pumps with a nameplate service factor of 1.0, set over­load protective device to nameplate full load current.

For pumps with a nameplate service factor of 1.15 or higher,
set overload protective device to 1.09 times the nameplate
full load current.

Size overload protective device so that trip current is 115% of
final setting as selected above.

SERVICE

Pump is permanently lubricated. No oiling or greasing is
required in normal service.

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

Hazardous voltage. Can shock, burn, or

cause death. Before servicing pump, disconnect electrical

power to pump and control switch.
After removing basin cover and necessary discharge piping,

lift pump out of basin.

Risk of electrical shock. Can burn or kill.

Do not lift pump by power cord. See “Cord Lift Warning”.
Place pump in an area where it can be cleaned thoroughly.

Remove all scale and deposits on pump.
Submerge pump in disinfectant (chlorox or chlorine) for at

least one hour before disassembling pump.
The pump motor housing contains a special lubricating oil.

Keep oil clean and free of water at all times.

NOTICE: Whenever motor cover is being removed for ser­vice, remove oil and replace with new oil at reassembly. Use
only oil listed in parts list (Part No. U197-8A). When filling
with new oil, DO NOT overfill. To allow room for expansion,
oil level with cold motor should be about 1/4’’ (6 mm) above
top of motor assembly.

Impeller, Seal, and Capacitor Replacement
– EC6/EC7/EH7/SC7/SCC7/HT7 Series

Risk of electrical shock. Disconnect electri­cal power before doing any service work on pump!

Refer to assembly drawings on Page 6.

Disassembly

1. Unscrew hex-head cap screws, remove motor assembly

from volute and set it on its side in a clean area.

2. Remove oil plug. Turn pump upside down to drain oil.

3. Hold impeller; remove impeller nut and washer.

4. Unscrew impeller (turn counter-clockwise) for cleaning.

Risk of electric shock. Before touching
capacitor, discharge it by shorting the terminals
together with an amber handled screwdriver.

5. Loosen cord nut and gently pull cord assembly out from
motor cover. Disconnect wires from cord set (wires and
connector are color coded for reassembly).

6. Unfasten socket head screws holding motor cover to seal
plate and remove motor cover.

7. If replacing capacitor, remove wires from capacitor.
Remove capacitor.

8. Remove rotating half of seal off of shaft.

9. Cradle motor assembly so that it stands vertically with
motor shaft extending out of the bottom.

10. Remove through bolts from motor assembly. Remove
motor and shaft from seal plate.

11. Working from back of seal plate, tap primary seal head
out of seal plate; thoroughly clean seat cavity.

Re-assembly

NOTICE: Make sure that seal faces are clean and undam-

aged. Apply Permatex #2 or equivalent sparingly to outside
edge of seal body (with spring) Figure 1.

1. Press new seal body into cavity in seal plate (Figure 1).

4

Pumping Range (Inches)

6 1014182226303438"

5.5"

6

10

14

18

22

26"

Tether Length (Inches)

3.5"

413 0893

Permatex
here

Impeller side of seal plate

Press seal
into cavity

Figure 1

Performance Graph – Tether Length vs. Pumping Range

2. Reinstall motor and shaft to seal plate using the four
through bolts removed in step 10 under “Disassembly”.

NOTICE: Do not overtighten through bolts!

3. Slide new rotating half of seal onto shaft (Figure 2).
NOTICE: Do not nick or scratch the silicon carbide seal

face when passing it over shaft shoulder. Seal faces must
be clean and undamaged or seal may leak.

4. Reassemble impeller, washer, and impeller nut.

5. Install new capacitor. See below for electrical connec­tions to capacitor.

6. Inspect O-Ring carefully; replace if damaged. If it is not
nicked or scratched, clean and reinstall.

NOTICE: It is good practice to replace O-Ring each time
pump is serviced.

7. Reinstall capacitor cover, feeding wire through connector
hole, then reconnect cord wires to connector. Reference
color code markings.

8. Fill motor with clean dielectric oil (Part No. U197-8A). To
allow room for expansion, oil level with cold motor should
be about 1/4’’ (6 mm) above top of motor assembly.

For three phase wiring connections, see the “Three Phase
Wiring Connection” diagrams on Page 8.

5

White

Red

Black

Green

Black

Capacitor

1308 1094

White

White

Red

Red

Black

Green

Green

Black

Slide ceramic
part onto
shaft.

Figure 2

Capacitor Connections (Single Phase Only)

Motor leads

HT7 only

Leads from

Stator

1. Attempting to lift or support pump by
power cord can damage cord and cord
connections.

2. Cord may pull apart, exposing bare wires
with possibility of fire or electrical shock.

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

4. Use lifting ring or handle on top of pump
for all lifting/lowering of pump. Disconnect
power to pump before doing any work on
pump or attempting to remove pump from
sump.

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

power cord.

WARNING

CORD LIFT WARNING

6

REPAIR PARTS – EC6, SC7, SCC7, EC7, EH7 AND HT7 SERIES

SC7/SCC7 EC6/EC7/EH7

HT7

1306 1094 HT7

Rope Handle Ring

Oil Fill Plug

U78-57DV

Volute

See Chart

Impeller
See Chart

Shaft Seal, Stationary
Head Assembly

Motor Assembly

See Chart

Motor Cover

1/4" Hex Capscrew (4)

Seal Plate

7/16" Hex Nut

U36-33SS

Not Shown

Capscrew, 1/4-20 x 1"
Soc Hd. Screw (4)

U30-475SS

O-Ring

U9-365

Float Switch

PW217-25A

Bosses tapped
1/2" NPT

Power Cord Assembly

PW217-282

Dielectric Oil (Qt -3 Required) U197-8A

NOTE: Pump uses 2.6 Qts.

Shaft Seal, Rotating
Mating Ring

U30-883SS

PW18-53A

PW18-54D

U97-102SS

U9-439A

U9-439B

Capscrew, U30-539SS

Float Switch
Cord Clamp, CC0030-13

Power Cord Assembly See Chart

Float Switch Cord Clamp, CC0030-13**

Capscrew, U30-539SS**

Rope Handle Ring U97-102SS
Oil Fill Plug U78-57DV

Capacitor See Chart

Rope Handle Ring

U97-102SS

(Included with
Motor Housing)

Oil Fill Plug

U78-57DV

Power Cord Assembly

See Chart

Capscrew,
U30-539SS**

Float Switch
Cord Clamp,
CC0030-13**

Float Switch See Chart

1/4-20 Soc Hd. Screw (4) U30-53SS

O-Ring

U9-365

** Included with models having a tether switch

7/16" Hex Nut

U36-33SS

Not Shown

Motor Through Bolts (4) U30-941

Dielectric Oil (Qt -3 Required) U197-8A

NOTE: All models use 2.6 qts.

Motor Assembly See Chart

Motor Cover PW18-54C

1/4" Hex Capscrew (4) U30-883SS

Seal Plate PW18-53A

Volute See Chart

Shaft Seal, Stationary Head Assembly

U9-439A

Shaft Seal, Rotating Mating Ring

U9-439B

Impeller See Chart

1306 1094 SC7

Capacitor

See Chart

Motor Assembly

See Chart

Motor Cover

PW18-54C

1/4" Hex Capscrew (4)

U30-883SS

Seal Plate

PW18-53A

Volute

See Chart

Shaft Seal,

Stationary Head Assembly

U9-439A

Shaft Seal,

Rotating Mating Ring

U9-439B

Impeller

See Chart

1/4-20 x 1" Capcrew (4)

7/16" Hex Nut

U36-33SS

Not Shown

Dielectric Oil (Qt -3 Required) U197-8A

NOTE: All models use 2.6 Qts.

**Included with models having a tether switch

Float Switch

See Chart

U30-53SS

O-Ring

U9-365

1306 1094 EC7 Series