Sta-Rite EC333220M Installation Manual

EC3/EC4/SC4/HT3/HTX3/SC5/SC6 Series

Submersible Solids
Handling Pumps

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.

1. Read these rules and instructions carefully. Failure to

follow them could cause serious bodily injury and/or
property damage.

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 80-1984
or the Canadian Electrical Code.

Hazardous voltage. Can shock,

burn, or kill. During operation the pump is in water.

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

5A. Disconnect power to outlet box before unplugging pump.
5B. Take extreme care when changing fuses. Do not stand

in water or put your finger in the fuse socket.

5C. Do not modify the cord and plug. When using the cord

and plug, plug into a grounded outlet only. When wiring
to a system control, connect the pump ground lead to
the system ground.

6. Do not run the pump dry. Dry running can overheat the
pump, (causing burns to anyone handling it) and will
void the warranty.

7. The pump normally runs hot. To avoid burns when ser­vicing pump, allow it to cool for 20 minutes after shut­down before handling it.

© 2007 S504 (Rev. 10/24/07)

293 Wright Street • Delavan, WI 53115

Motor Individual Cord Switch Setting Discharge

Model Motor Full Branch Circuit Length in inches (mm)

Adapter

Number HP Voltage Load Amps Required (Amps) in ft. (m)

On Off Size

EC333120T 1/3 115/1 13.0 15 20 (6.1) 13.5 (343) 4.5 (114) 1-1/2"
EC333120M 1/3 115/1 13.0 15 20 (6.1) – – 1-1/2"
EC333220T 1/3 230/1 7.0 10 20 (6.1) 13.5 (343) 4.5 (114) 1-1/2"
EC333220M 1/3 230/1 7.0 10 20 (6.1) – – 1-1/2"
EC440120T 4/10 115/1 9.7 15 15 (4.6) 16.5 (419) 7.5 (191) 2"
EC440120M 4/10 115/1 9.7 15 15 (4.6) – – 2"
EC440220T 4/10 230/1 4.9 10 20 (6.1) 16.5 (419) 7.5 (191) 2"
EC440220M 4/10 230/1 4.9 10 20 (6.1) – – 2"
SC440110T 4/10 115/1 12.5 15 10 (3.0) 16 (406) 7 (178) 2"
SC440110M 4/10 115/1 12.5 15 10 (3.0) – – 2"
SC440120T 4/10 115/1 12.5 15 20 (6.1) 16 (406) 7 (178) 2"
SC550110T 1/2 115/1 13.0 15 10 (3.0) 16 (406) 7 (178) 2"
SC550110M 1/2 115/1 13.0 15 10 (3.0) – – 2"
SC550120T 1/2 115/1 13.0 15 20 (6.1) 16 (406) 7 (178) 2"
SC550120M 1/2 115/1 13.0 15 20 (6.1) – – 2”
SC550220T 1/2 230/1 8.0 15 20 (6.1) 16 (406) 7 (178) 2"
SC550220M 1/2 230/1 8.0 15 20 (6.1) – – 2"
SC650110T 1/2 115/1 9.0 10 10 (3.0) 18 (457) 8.5 (216) 2"
SC650120T 1/2 115/1 9.0 10 20 (6.1) 18 (457) 8.5 (216) 2"
SC650120M 1/2 115/1 9.0 10 20 (6.1) – – 2"
SC650220M 1/2 230/1 5.0 10 20 (6.1) – – 2"
HT333120T 1/3 115/1 13.0 15 20 (6.1) 13.5 (343) 4.5 (114) 1-1/2"
HTX333120M 1/3 115/1 13.0 15 20 (6.1) 1-1/2"

MOTOR, SWITCH, & CORD SPECIFICATIONS

8. The pump is permanently lubricated. No oiling or greas­ing is required in normal operation. for overhaul, see
instructions under “Service”.

DESCRIPTION

These submersible sump/effluent and sewage pumps are
designed for effluent and wastewater removal, sump drainage,
dewatering, flood control. The high temperature models can be
used in boiler blow down pits, condensate pits and as hot water
pumps. Units have built in thermal overload protection with auto­matic reset. The mechanical seal and ball bearings on the motor
shaft are permanently lubricated. Stainless steel hardware and a
heavy duty lift out ring allow for easy disassembly after extended
use.

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

SPECIFICATIONS

Power supply required...............See “Motor, Switch and Cord

Specifications” chart on Page 1

Motor duty ..........................................................Continuous**

Maximum Liquid Temperature............................130°F(55°C)*

Discharge Adapter ......................................1-1/2” OR 2” NPT

*HT3 and HT3X Series pumps have a maximum liquid tem­perature of 194°F (90°C).

** For continuous duty, pump must be fully submerged in a
liquid with a maximum temperature of 105° F (41° C).
SC650 Series models only.

INSTALLATION

Hazardous voltage. Can shock, burn or kill.

Do not lift pump by the power cord. See “Cord Lift Warning”
on Page 3.

NOTICE: Install the pump on a hard, level surface (cement,
asphalt, etc.). Never place the pump directly on earth, clay or
gravel surfaces.

Piping

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

capable of handling semi-solids of at least 2" (51mm) in
diameter.

When installed in an effluent system, the pipe must be
capable of handling semi-solids of at least 3/4" (19mm) in
diameter.

The rate of flow in the discharge pipe must keep any solids
present in suspension in the fluid. To meet minimum flow
requirements (2 feet per second in the discharge line), size
the pipe as follows:

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

1-1/2" (38mm) 12 GPM
2" (51mm) 21 GPM
2-1/2"(64mm) 30 GPM
3"(76mm) 48 GPM

In a sewage system use a 2" (51mm) 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" (38mm) 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.

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

Drill a 3/16" (5mm) hole in the discharge pipe about 1–2"
(25-51mm) above the pump discharge connection (but below
check valve) to prevent airlocking the pump.

Electrical

Hazardous voltage. Can shock, burn, or kill.

When installing, operating, or servicing this pump, follow the
safety instructions listed below.

1. DO NOT splice the electrical power cord.

2. DO NOT allow the electrical cord plug to be submerged.

3. DO NOT use extension cords. They are a fire hazard and

can reduce voltage sufficiently to prevent pumping and/or
damage motor.

4. DO NOT handle or service the pump while it is connect-

ed to the power supply.

5. DO NOT remove the grounding prong from the plug or

modify the plug. To protect against electrical shock, the
power cord is a three-wire conductor and includes a 3­prong grounded plug. Plug the pump into a 3-wire,
grounded, grounding-type receptacle. Connect the pump
according to the NEC or CEC and local codes.

For automatic operation, plug or wire the pump into an auto­matic float switch or duplex controller. The pump will run con­tinuously when plugged directly into an electrical outlet.

Connect or wire pump to its own individual branch circuit with
no other outlets or equipment in the circuit. Size fuses or cir­cuit breakers according to the “Motor, Switch and Cord
Specifications” chart.

Risk of electrical shock and fire. Can burn,

kill or cause property damage. 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.

2

GPM AT TOTAL FEET

Model 51015202530

CAPACITY GALLONS/MINUTE

EC333120T – 46 32 12 – – 22
EC333120M – 46 32 12 – – 22
EC333220T – 46 32 12 – – 22
EC333220M – 46 32 12 – – 22
EC440120T 61 52 45 38 30 21 40
EC440120M 61 52 45 38 30 21 40
EC440220T 61 52 45 38 30 21 40
EC440220M 61 52 45 38 30 21 40
SC440110T 90 66 25 – – – 18
SC440110M 90 66 25 – – – 18
SC440120T 90 66 25 – – – 18
SC550120T 91 64 31 – – – 18
SC550120M 91 64 31 – – – 18
SC550110T 91 64 31 – – – 18
SC550110M 91 64 31 – – – 18
SC550220T 91 64 31 – – – 18
SC550220M 91 64 31 – – – 18
SC650110T 160 130 75 22 – – 23
SC650120T 160 130 75 22 – – 23
SC650120M 160 130 75 22 – – 23
SC650220M 160 130 75 22 – – 23
HT333120T* – 42 30 10 – – 21
HTX333120M* – 42 30 10 – – 21

No flow

at height

shown below

*For performance at maximum temperature see Catalog.

PERFORMANCE

OPERATION

Risk of fire or explosion. Can cause severe

personal injury, property damage or death. Do not use in

explosive atmospheres. Pump water only with this pump.
NOTICE: Do not allow the pump to run in a dry sump. It 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 and start the motor.

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

The pump is permanently lubricated. No oiling or greasing is
required.

SERVICE

General

Hazardous voltage and risk of cord dam-

age. Can shock, burn, or kill. Before removing the pump

from the basin for service, always disconnect electrical power
to the pump and the control switch. Do not lift the pump by
the power cord. See the “Cord Lift Warning” below.

After removing the basin cover and the necessary discharge
piping, lift the pump out of the basin.

Place the pump in an area where it can be cleaned thor­oughly. Remove all scale and deposits on the pump.

Submerge the complete pump in a disinfectant solution
(chlorox or chlorine bleach) for at least one hour before dis­assembling the pump.

The pump motor housing contains a special lubricating oil
which should be kept clean and free of water at all times.

NOTICE: Whenever the motor housing is being removed for
service, remove oil and replace it with new oil at reassembly.
Use only oil listed in parts list in this manual. When filling
with new oil, DO NOT overfill. Allow about 7/8" (22mm) air
space from top of boss in housing for expansion of oil when
the pump is operating.

Pump Disassembly

Impeller and Seal Replacement
A. Impeller removal (See the correct pump disassembly

drawing, “Model Number Cross Reference Chart”, Page 4):

1. Remove the oil fill plug and turn the pump upside
down to drain oil.

2. Remove the capscrews holding the upper motor hous­ing to the lower motor housing; lift off the upper motor
housing and remove the motor lead wires from the
connector to detach upper housing from assembly.
The lead wires are fitted with quick connect terminals
for this purpose.

3. Remove the capscrews holding the lower motor hous­ing to the volute; lift off the lower motor housing.

4. Hold the rotor shaft assembly and unscrew the
impeller by turning it counter-clockwise. Remove
impeller and clean it.

If no more service is needed, reverse instructions above
to reassemble the pump. Reattach the motor lead wires
as shown in Figure 1, fill with clean dielectric oil (Part
No. U197-8A), check the oil level and replace fill plug.
Oil should cover the motor windings (E3/EC3/SC5
Series) or the top of the motor (EC4 Series).

B. Shaft seal replacement:

1. Follow the instructions to remove the impeller, above.

2. Remove the stator capscrews and the spacers (if
applicable). Lift off the stator.

3. Remove the seal’s ceramic seat from the shaft and tap
the body of the seal out of the lower motor housing.

4. Clean the seal cavity thoroughly before installing the
new seal. NOTICE: Make sure that the seal faces are
clean; do not scratch or damage the new seal face
during seal replacement. Apply Permatex #2 or an
equivalent sparingly to the outside edge of seal body
before installing the seal in the lower motor housing.

5. Press the new seal body into position in the lower
housing cavity.

6. Press the ceramic seat onto the motor shaft. The
impeller will pull it into position.

7. Reassemble the stator and tighten the stator cap­screws. If your pump has a capacitor (Key. No. 14), be
sure the spacer is under it to keep it away from the oil
in the motor.

Risk of electrical shock. Can burn or

kill. Discharge capacitor before handling it. Electrical

shock can burn or kill.

8. Reassemble the impeller and the pump (reverse
instructions 1 through 4 in section A).

9. Install new capacitor.

10. Reattach the motor lead wires as shown in Figure 1.

11. Fill with clean dielectric oil (Part No. U197-8A), check
the oil level and replace the oil fill plug.

Figure 1

3

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

Green Wire
(connected between
the two tallest
dividers)

View A-A

Either Black Wire

Short Divider

Either Black Wire

409 0893

4

410 0893

Oil Fill
Plug

Housing
Capscrew

Rotor/Stator
Assembly

Stator
Capscrew

Lower
Motor
Housing

Volute

Shaft Seal,
Stationary
Head Ass’y

Shaft Seal,
Rotating
Mating Ring

O-Ring

Insulating
Disk

Blk

Blk

Grn

Impeller

Power Cord

Pump Disassembly

EC3/SC5/HT3/HTX3 Series

Oil fill plug

Upper motor
housing

Housing
capscrew

Power cord
connector

Blk

Blk

Grn

Rotor/Stator
Assembly

Lower Motor
Housing

Rotor/Stator
Capscrew

Volute

A

A

(See Fig. 1)

Shaft Seal, Stationary Head Assembly
Shaft Seal, Rotating Mating Ring

Impeller

Spacer

Pump Disassembly – EC4 Series

NEW MODEL NO. ORIGINAL MODEL NO.

EC333120T PWE3B01A
EC333120M PWE3B01
EC333220T PWE3B02A-04
EC333220M PWE3B02-04
EC440120T PWE4C01A
EC440120M PWE4C01
EC440220T PWE4C02A
EC440220M PWE4C02
SC440110T NEW
SC440110M NEW
SC440120T NEW
SC550120T PWS5C01A-07
SC550120M PWS5C01-07
SC550110T PWS51C01A-07
SC550110M PWS51C01-07
SC550220T PWS5C02A-06
SC550220M PWS5C02-06
SC650110T PWS61C01A
SC650120T PWS6C01A
SC650120M PWS6C01
SC650220M PWS6C02
HT333120T PHTS3B01-06
HTX333120M PHTSX3B01-06

MODEL NUMBER CROSS
REFERENCE CHART

5

3917 0301 Disassmbly

Shaft Seal, Stationary Head Assembly

Shaft Seal, Rotating Mating Ring

Lower Motor Housing

Impeller

Insulating Disk

Volute

Upper Motor Housing

Oil Fill
Plug

Capscrews

Switch Cord Clamp

Pump Disassembly – SC4 Series

Oil fill
plug

Upper motor
housing

Housing
capscrew

Power cord
connector

Lower Motor
Housing

Rotor/Stator
Assembly

Rotor/Stator
Capscrew

Volute

Shaft Seal, Stationary Head Assembly
Shaft Seal, Rotating Mating Ring

Impeller

A

A

(See Fig. 1)

Pump Disassembly – SC6 Series

6

EC3/SC5/HT3/HTX3 SERIES EXPLODED VIEW

EC333120M EC333220M SC550110M SC550120M SC550220M

Key Part EC333120T EC333220T HT333120T HTX333120M SC550110T SC550120T SC550220T

No. Description Qty. 1/3 HP 115 V 1/3 HP 230 V 1/3 HP 115 V 1/3 HP 115 V 1/2 HP 115V 1/2 HP 115V 1/2 HP 230V

1 Power Cord 1 PW117-122-TSE PW117-218-TSE PW117-226-TSE § PW117-237-TSE PW117-122-TSE PW117-218-TSE
2 Cord Connector 1 PS17-46P PS17-46P PS17-46P § PS17-46P PS17-46P PS17-46P
3 Handle Ring 1 U97-128 U97-128 U97-128 U97-128 U97-128 U97-128 U97-128
4 1/4" NPT Plug 1 U78-57DT U78-57DT U78-57DT U78-57DT U78-57DT U78-57DT U78-57DT
5 Upper Motor Housing 1 PW18-22F PW18-22F PW18-22F PW18-22 PW18-22F PW18-22F PW18-22F
6 #10-32 x 3/4" Capscrew 6 U30-482SS U30-482SS U30-482SS U30-482SS U30-482SS U30-482SS U30-482SS
7 Insulating Disk 1 PS18-82 PS18-82 PS18-82 PS18-82 PS18-82 PS18-82 PS18-82
8 #10-32 x 3-1/8" Capscrew 2 U30-949ZP U30-949ZP U30-949ZP U30-949ZP U30-949ZP U30-949ZP U30-949ZP
9 Rotor/Stator Assembly 1 PS218-151 — PS218-151 PS218-151 PS218-151 PS218-151 —

• Rotor/Shaft Assembly 1 — PS118-151R — — — — PS118-151R

• Stator 1 — PS118-153S — — — — PS118-153S
10 Switch Cord Clamp* 1 CC0030-13 CC0030-13 CC0030-13 — CC0030-13 CC0030-13 CC0030-13
11 #8-32 x 1/2” Capscrew* 1 U30-539SS U30-539SS U30-539SS — U30-539SS U30-539SS U30-539SS
12 Automatic Float Switch* 1 PS17-111 PW217-222 PW217-25 — PS17-109 PS17-111 PW217-222
13 O-Ring 1 U9-339 U9-339 U9-339 U9-339 U9-339 U9-339 U9-339
14 Lower Motor Housing 1 PW18-23AA PW18-23AA PW18-23AA PW18-23AA PW18-23AA PW18-23AA PW18-23AA

15A Shaft Seal Stationary

Head Assembly 1 U9-379A U9-379A U9-379A U9-379A U9-379A U9-379A U9-379A

15B Shaft Seal Rotating

Mating Ring 1 U9-321A U9-321A U9-321A U9-321A U9-321A U9-321A U9-321A
16 Impeller 1 PW5-5P PW5-5P PW5-5 PW5-5 PW5-11P PW5-11P PW5-11P
17 Volute 1 PW1-4 PW1-4 PW1-4 PW1-4 PW1-13 PW1-13 PW1-13

• Dielectric Oil 1 U197-8A U197-8A U197-8A U197-8A U197-8A U197-8A U197-8A

• Not Illustrated.
* Models w/“T” suffix only.

§ Requires Replacement Cord, Part No. PW117-106-TSE.

REPAIR PARTS LIST

1

2

3
4

5

6

7

8

9

12

11
10

13

14

6

15A
15B

16

17