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© Copyright 2017 Zoeller

®

 Co. All rights reserved.

1-1/4" N.P.T.

18-5/8" [473 mm]

5" [127 mm]

6-1/2"

[165 mm]

4" [102 mm]

4" [102 mm]

7-5/8"

[194 mm]

4"

[102 mm]

General Information

GRINDER PUMP DESCRIPTION

1.  Pumps are constructed of class 30 cast iron with powder 

coated epoxy protection for long life when pumping sew-

age in submersible applications.  The cutter assembly is 

comprised of 440 C stainless steel components hardened 

to a value of 55-60 on the Rockwell C scale; a cutter and 

a precision ground flat disk.  Cutting action takes place 

with the rotation of the cutter in the clockwise (looking 

down on the unit) direction only, see Fig. 6 on page 11.

2.  Pump motors are single phase design.  Single phase 

motors require a starting relay, starting capacitor and 

a run capacitor.  These items are located in the switch 

case on the pump.

3.  These grinder pumps have a single seal design and do 

not have sensor wires.

4.  Automatic reset thermal overload protection is integral on 

single phase motors. For three phase models, overload 

protection is to be provided in the control panel.

FIELD ASSEMBLED INSTALLATION

1. Installation and piping instructions are included with 

the rail system and basin instructions.  If pump is being 

retrofitted to an existing rail system, accessory parts 

may be required.  Consult the factory and advise make 

and model of rail system being used.

2.  Refer to the appropriate Indoor/Outdoor prepackaged 

instructions on pages 6-9 for more information on 

system installation.

3. All electrical connections including pump to control 

box and power supply to control panels must comply 

with the “National Electrical Code” and applicable local 

codes.  Conduit and panel enclosure openings must 

have a gas and watertight seal.  Installation of electrical 

panels, conduit and connections should be made by a 

qualified licensed electrician.  A UL Listed potting kit, 

P/N 10-2350, is available from Zoeller Company.

4.  When installing a pump with a check valve, or a rail 

system with a check valve, you must give the pump 

case time to fill to help prevent air lock when lowering 

the unit into the liquid. The pump case has an air vent 

located behind the discharge. This air vent is across the 

pump housing mounting surface and must be cleaned 

before each reinstall. An extra air vent hole (3/16") may 

be drilled in discharge pipe below the check valve to 

help prevent air lock. This drilled hole must be cleaned 

before each reinstall. After the pump is installed, run 

the unit submerged to assure the pump case is filled 

(Water should come out of 3/16" diameter hole).

SK1621

FIGURE 1.

154108

154108

TOTAL DYNAMIC HEAD/FLOW

PER MINUTE

SEWAGE AND DEWATERING

Shut-off Head:

90

100

80

70

53 ft. (16.2m)

27.4
30.5

24.4

21.3

-
-

-

-

MODEL

60

50

40

30

20

10

5

Feet

-

-

16.5

28

37

42

15.2
18.3

12.2

6.1

9.1

3.0

-
-

62

140

106

159

43

Gal.

1.5

Meters

820

Liters

163

-

-

12

81 ft. (24.7m)

-

-
-

-

45

22

32

39

42

43

43

121

83

148

159

43

Gal.

819

Liters

Gal.

818

Liters

-
-
-
-

16.7

27

36

107 ft. (32.6m)

7

63
26

102

136

43

46

46

46

46

46

174
163

174

174

174

174

46

174

15

40

35

41

25

33

43

4.6

7.6

10.7

163
163
163

151

125

83

22

163

155

43

163

46

174

46

174

46

174

20

30

40

50

60

10

15

20

25

30

35

40

45

50

55

5

20

40

60

80

100

120

140

160

180

200

0

METERS

FEET

PUMP PERFORMANCE CURVE

MODELS 818/819/820 

0

TOT

AL

 DYNAMIC HEAD

FLOW PER MINUTE

U.S. GALLONS

LITERS

70

10

80

90

100

110

4

8

12

16

20

24

28

32

820

819

818

Summary of Contents for 818

Page 1: ...ntents Safety Instructions 1 Limited Warranty 2 Preinstallation Checklist 3 General Information 4 Pump Wiring Instructions 5 Typical Indoor Prepackaged System 6 Indoor Prepackaged Installation Instructions 7 Typical Outdoor Prepackaged System 8 Outdoor Prepackaged Installation Instructions 9 Operation 10 Cutter Maintenance 11 Service Checklist 12 Safety Instructions TO AVOID SERIOUS OR FATAL PERSO...

Page 2: ... user or 18 months from date of original manufacture of the product whichever comes first Parts that fail within the warranty period one year from date of purchase by the end user or 18 months from the date of original manufacture of the product whichever comes first that inspections determine to be defective in material or workmanship will be repaired replaced or remanufactured at Manufacturer s ...

Page 3: ... grinder pump or other pit peculiarities and are secured so that the grinder pump will shut off It is recommended to use rigid pipe and fittings and the pit be 24 in diameter for simplex systems and 36 in diameter for duplex systems or larger 4 Grinder installations should be checked yearly for debris and or build up which may interfere with the ON or OFF positions of variable level float controls...

Page 4: ...ust comply with the National Electrical Code and applicable local codes Conduit and panel enclosure openings must have a gas and watertight seal Installation of electrical panels conduit and connections should be made by a qualified licensed electrician A UL Listed potting kit P N 10 2350 is available from Zoeller Company 4 When installing a pump with a check valve or a rail system with a check va...

Page 5: ...iagram above to secure the float switch properly and obtain the proper tether to customize the on off cycle to each application Note the minimum off level shown above On Prepackaged Systems the tether length is set at 5 Determining Pumping Range in Inches 1 inch 2 5 cm Tether Length 5 10 15 20 22 Pumping Range 9 13 5 18 22 24 Use only as a guide Due to weight of cable pumping range above horizonta...

Page 6: ...4 STEEL CORD SEAL INSPECTION PLATE 3 GROMMET SEAL SWITCH CORD ALARM FLOAT BASIN COVER LIFTING BOLT 16 X 1 4 STEEL 5 16 304 STAINLESS STEEL PUMP PLATE PUMP POWER CORD SILENCE INPUT 1 POWER ON FIELD INSTALLED ALARM 4 RUBBER INLET CAST IRON ADAPTERS OFF 24 NOMINAL TO ALARM PANEL BALL VALVE FIELD INSTALLED GALVANIZED PIPE 1 1 4 X 32 GALVANIZED PIPE 1 1 4 X 12 GRINDER PUMP SINGLE PHASE 2HP 1 1 4 GROMME...

Page 7: ...n a very low traffic area within 15 of the power disconnect The hole should be at least 8 larger in diameter than the basin in order to leave 4 of backfill all the way around the perimeter A minimum of 4 of compacted subbase is also required Backfill and subbase should be 1 8 to 3 4 pea gravel or 1 8 to 1 2 crushed stone Also reference the basin installation instructions included with the unit 6 T...

Page 8: ... AFD 1 25 2 Z RAIL 2 CAST IRON CHECK VALVE 3 4 GALV GUIDE RAILS 2 SCH 80 BALL VALVE 2 FLEX BOOT FITTING LOCATION VARIES WITH BASIN DEPTH FLOAT TREE ASSEMBLY 2HP GRINDER PUMP 2 PVC SCH 80 PLBG 1 8 302 STAINLESS STEEL LIFTING CABLE ALARM ON OFF SOLID FIBERGLASS COVER HIGH WATER ALARM OR SIMPLEX CONTROL PANEL FIELD INSTALLED ALARM FLOAT SWITCH MUST OPERATE OFF LOW VOLTAGE TO BE USED WITH QWIK BOX SK3...

Page 9: ...iameter with the hole in the basin Attach the hub to the side of the basin using the sealant and hardware provided 6 The bottom of the excavation can now be properly backfilled compactedandleveled Setbasininhole Ensuretheremovable cover extends above the finished grade line and the grade slopes awayfromtheunit Backfillandsubbaseshouldbe1 8 3 4 pea gravel or 1 8 1 2 crushed stone Reference basin in...

Page 10: ...nd securely installed Floats positioned properly Discharge valves open 3 16 vent hole drilled in pipe between check valve and pump Once the above has been verified proceed with the following checks Pump power cables and control floats properly installed and voltage verified Conduit connections to panel and junction box are properly sealed After installing the pump into the containment area with ad...

Page 11: ...by surface grinding both disc and cutter to a 32 micro finish Do not attempt grinding in the field Send parts to a qualified machine shop or return to the factory for repair The disc cutter and shims are a matched set Keep parts together Measure disc before and after resurfacing with micrometer and record measurements 7 Afterresurfacing thediscandcuttermustbeflatwithin0 001 If the disc has been su...

Page 12: ... always disconnect pump and panel from its power source before handling Neverenterthebasinuntilithasbeenproperlyvented and tested Any person entering a basin should be wearing a harness with safety rope extending to the surface so that they can be pulled out in case of asphyxiation Sewage water gives off methane and hydrogen sulfide gases both of which can be highly poisonous Installationandchecki...

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