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23833A595

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1.  Push in red reset button to reset overload.  If overload trips again after 

short run, pump has some damage and must be removed from basin for 

checking.

2.  Trouble may be from clogged grinder causing motor to overload or could 

be from failed motor.

3.  Trouble may be from faulty component in control box.  Always check 

control box before removing pump.

1.  Indicates H-O-A switch be in the hand position.
2.  Level control switch may have failed causing pump to continue to oper-

ate when water is below lower float.

3.  Grinder assembly may be partially clogged causing pump to operate at 

very reduced capacity.

4.  Check valve may be clogged causing low pump flow.  Gate valve may 

be in off position.

5.  Pump may be air locked.

1.  Reset breaker by pushing clear down on handle then back to on posi-

tion.  If breaker trips again in few seconds it indicates excessive load 

probably caused by a short in the  motor or control box.  Check out 

instructions given with control box before pulling pump.

2.  If this condition happens after an electrical storm, motor or control box 

may be damaged by lightning.

3.  Resistance reading of the motor with lead wires disconnected from the 

control box can determine if trouble is in motor or control box.

1.  Grinder assembly may be partially clogged with some foreign objects 

causing noise and overload on the motor.

2.  Grinder impeller may be rubbing on grinder ring due to bent shaft or mis-

alignment.

1.  Pump “ON” switch may be set too high.
2.  Run pump on hand operation for several minutes with small amount 

of water running into basin to clean out solids and grease.  This allows 

pump to break suction and surge which will break up the solids.

3.  Trash may have accumulated around lower weight causing pump to turn 

off too soon.  Clean trash from weight and suspension cable.

Overload trips and alarm buzzer 

or flashing red light comes on 

due to high water level in basin

Yellow run light stays on con-

tinuously

Circuit breaker trips

Pump is noisy and pump

rate is low

Grease and solids have accumu-

lated around pump and will not 

pump out of basin

              CONDITION                                                            PROBABLE CAUSE

Summary of Contents for DELTA ENVIRONMENTAL D2C20 Series

Page 1: ...this manual to the owner of the equip ment or to the responsible party who maintains the system D2C20 SERIES CENTRIFUGAL GRINDER PUMP SERVICE MANUAL AND PARTS LIST D2C20 21 Single Phase and D2C20 23 T...

Page 2: ...cool for 30 minutes after shutdown before handling it Submersible grinder pumps are not approved for use in swimming pools recreational water installations decorative fountains or any installation whe...

Page 3: ...f Pumps Model D2C20 21 is UL and CSA approved Level Sensing Controls Intrinsically safe type float controls are recommended for all applications An intrinsically safe control panel relay will limit th...

Page 4: ...ve Lift pump until sealing flange is open to vent off trapped air Lower pump open discharge valve and start the pump again CAUTION Positive displacement pump is designed to operate at minimum 5 GPM ca...

Page 5: ...00 Housing w Stator 1 See Chart Rotor Only 1 See Chart Ref No Part No Description Req d Number 25 Bearing Lower 1 08565A018 26 Gasket 5 1 2 I D x 1 8 2 05014A171 27 Housing Upper Seal 1 24328D000 28 F...

Page 6: ...NEL DON T RELY ON OPENING CIRCUIT BREAKER ONLY Pump has two oil filled chambers 1 the motor and ball bearings and 2 the seal chamber for long life and best heat transfer The lower seal above the pump...

Page 7: ...om basin Red light comes on at control box PROBABLE CAUSE 1 Pump impeller may be air locked this occasionally occurs on a new installation Start and stop pump several times to purge air 2 Run addition...

Page 8: ...en with control box before pulling pump 2 If this condition happens after an electrical storm motor or control box may be damaged by lightning 3 Resistance reading of the motor with lead wires disconn...

Page 9: ...ON OPENING CIRCUIT BREAKER ONLY DISASSEMBLY OF SHREDDING RING AND GRINDER IMPELLER 1 Remove three screws from grinder ring flange Grinder ring is pressed into flange for easy removal See Fig 1 2 Threa...

Page 10: ...h on impeller and screw up against shoulder Now pump can be reassembled See Fig 5 8 Clean all threads with wire brush and file smooth any threads that may be nicked 9 Use Never Seeze or other graphite...

Page 11: ...23833A595 11 MOTOR WIRING DIAGRAM...

Page 12: ...23833A595 12 PUMP DIMENSION PERFORMANCE CURVE...

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Page 16: ...in 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 servi...

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