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® 

Co. All rights reserved.

6

OPERATION AND MAINTENANCE REQUIREMENTS

1.  Pump Operation – There are three indicator lights on the 

terminal box: Power (Green), Failure (Red), and On (Yellow). 

Pump operating conditions are indicated as below: (FIG 6) 

a) Power (Green): It is always on when connected to power. 

b) On (Yellow): Turns on when tap is open - indicates normal 

operation. 

c) Failure (Red): Turns on when tap is open - indicates pump 

is run dry. 

d) On (Yellow): Turns on intermittently when tap is closed - 

indicates pipe leak.

FIG 6 – PUMP OPERATION INDICATORS

Green

Red

Yellow

CITY

PRESSURE

BOOSTER PUMP

Refer to Instruction Manual

before installing or operating pump

156388 A

2.  Periodically check the condition of the check valve and 

strainer (if used).

3.  If the pump is to be inactive for long periods, it should be 

rinsed thoroughly with clean water, then drained and stored 

in a dry place.

4.  If the pump shaft is seized up after periods of inactivity, place 

a screwdriver in the motor end to rotate the shaft. This should 

free the pump shaft. (See FIG 7). If this does not remedy the 

problem, the pump will need to be dismantled.

FIG 7 – FREEING UP PUMP SHAFT

IL1964

5.  Internal Check Valve

 – If Teflon tape or debris enters into the 

pump cavity, the operation of the internal check valve can be 

restricted. This may create an erratic or poor performance 

with the pump. To clean the check valve (FIG 8).

FIG 8 – INTERNAL CHECK VALVE

a.  Remove the air relief

     port and top cover

b.  Confirm the spring 

      and check valve are 

      free of debris

c.  Reassemble the top

     cover and air relief

     port

IL1308B 

DO NOT apply any bonding material (such as silicon, glue, 

etc.) to seal the chamber cover. (FIG 9)

FIG 9 – DO NOT GLUE CHAMBER

IL1968

 

Summary of Contents for 350

Page 1: ... Product information presented here reflects conditions at time of publication Consult factory regarding discrepancies or inconsistencies MAIL TO P O BOX 16347 Louisville KY 40256 0347 SHIP TO 3649 Cane Run Road Louisville KY 40211 1961 TEL 502 778 2731 1 800 928 PUMP FAX 502 774 3624 Visit our website zoellerpumps com ...

Page 2: ...n this manual when connecting to power lines 4 Always disconnect power source before performing any work on or near the motor or its connected load 5 Risk of electric shock This pump has not been investigated for use in swimming pool areas or marine areas 6 Protect electrical cord Replace or repair damaged or worn cords immediately 7 To reduce the risk of electric shock connect only to a properly ...

Page 3: ...n be used to decrease the on off cycle rate of the pump system which can extend the life of the pump Typical tank 3 gallon draw down Set tank PSI equal to pump tank PSI The entire system must be air and water tight to maintain prime Use thread tape on all connections to ensure no leaks Hand tighten all threads and then add additional half turn with wrench FOR NEW PUMP INSTALLATION 1 The inlet and ...

Page 4: ...ected from the cold environment OPERATING CONDITIONS Ambient temperature range 32 ºF 0 ºC to 104 ºF 40 ºC PRIMING After installation with the pump OFF open ball valves 1 and 2 and slowly unthread the air relief plug FIG 4 Allow inlet water pressure to fill the pump cavity and remove in line air pockets After the pump cavity fills with water retighten the air relief plug FIG 4 PRIMING ILLUSTRATION ...

Page 5: ...amage Once water flow is restarted the pump will re start the power automatically 4 Rapid Cycle Protection If the unit cycles repeatedly on off the unit will shut down to protect the pump life The optional water tank not maintaining pressure could be a potential cause Hourly it will turn on to sample the water flow requirements and return to shut down if the problem persists The home owner can fix...

Page 6: ... 3 If the pump is to be inactive for long periods it should be rinsed thoroughly with clean water then drained and stored in a dry place 4 If the pump shaft is seized up after periods of inactivity place a screwdriver in the motor end to rotate the shaft This should free the pump shaft See FIG 7 If this does not remedy the problem the pump will need to be dismantled FIG 7 FREEING UP PUMP SHAFT IL1...

Page 7: ... the flange b Place the 4 screws in the flange DO NOT tighten at this time When all 4 screws are in place tighten them diagonally onto the flange DO NOT over tighten Recmmended torque is 18 22 in lbs FIG 11 PLACING GASKET ON FLANGE FIG 12 TIGHTENING FLANGE Screws should be tightened diagonally Do not tighten the screws unevenly Pipe and flange should be installed in a straight line IL1966 Screw to...

Page 8: ...erandsubsequentownerduringthewarranty period every new product to be free from defects in material and workmanship under normal use and service when properly used and maintained for a period of one year from date of purchase Proof of purchase is required Parts that fail within the warranty period that inspections determine to be defective in material or workmanship will be repaired replaced or rem...

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