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5

3.a  Connect the pressure gauge to the tap in the discharge and, 

if required, in the suction flange. Position dial face to facilitate 

reading.

3.b  Make drain pipe connections. Route piping so that it will not 

interfere with normal maintenance procedures.

3.c  If packing gland bypass line is to be installed use the following 

chart to determine correct configuration.

4.  Electrical Connections
4.a  All connections to the motor such as main leads, space heat-

er leads, winding protection leads, etc., should be made in 

accordance with prevailing specifications.

4.b  Motor wiring can be identified by the following designations:

 

  H – Space Heaters

 

  P – Thermostats

 

  T – Main leads (connect per nameplate and voltage    

    required) on motor.

B:    STORAGE
B1:   CONSIDERATIONS

When a pump is made for use in a sump or a can, it is usually 

a short coupled or close coupled pump assembly. Short coupled 

pump assemblies are usually shipped assembled but with the 

driver separate. Storage for such a pump is an easy matter. See 

Section B3 below.

Pumps used for deep sump or well applications on the other 

hand, tend to be deep setting pumps. These are shipped unas-

sembled. The unassembled pieces are generally the driver, the 

discharge or motor stand, column pipe, tube and shaft assem-

blies, and the bowl assembly. The following is a general list of 

storage suggestions.

B2:   GENERAL  HINTS

As stated in Section A1 INSTALLATION of this manual, it is a 

very good idea to make sure all of the necessary items ordered 

are received without damage.
1  After uncrating/unpackaging and checking that all items were 

received in good order, recrate and package all items in the 

same manner that they were received. Clearly label each 

package as to the contents and use in the assembly.

2.  If more than one size and/or model of pump is ordered, take 

special care not to confuse like items, such as valves, gauge, 

bolts and hardware, or spare parts, for the two or more pumps.

3.  Group parts according to their stage of assembly. Example: 

bowls first, column and shafting second, discharge third, and 

so on. This will save searching for the proper parts and hard-

ware at any given point during assembly.

B3:   SHORT COUPLED PUMPS

1.  Cover suction and discharge ports to prevent entrance of any 

foreign materials.

2.   Cover all other miscellaneous holes, i.e. pressure relief, pre-

lube and pressure gauge holes, etc.

3.  Avoid exposure to weather and elements: either store indoors 

or cover with a tarp.

4.  Use a support framework so that no side pressure is exerted 

on the pump when placed in storage.

C:   ELECTRICAL
D:   OPERATION
D1:   PRIOR TO START-UP

1.  Perform initial servicing on the driver as recommended by 

the driver manufacturer. Also perform initial servicing on all 

auxiliary assemblies if required.

2.  Recheck all fasteners and fittings for tightness.

3.  If the air release is manual or if air vent is automatic but 

equipped with a valve, make certain the valve is opened 

partially but not all of the way.

4.  If there is a control valve on the discharge side of the pump, 

make certain it is partially open so that the pump will not be 

damaged if normal back pressure is not available until the 

line is filled.

9.  Bump starter to insure that the unit has correct rotation.

D2:   INITIAL  START-UP

1.  Energize starter. After pump has come up to the rated speed 

and all air has been exhausted, regulate control valve to 

achieve desired pressure.

2.  If the air release is manual, close it off after air is exhausted. 

If air release is automatic, determine if the air was exhausted 

too quickly (which causes the pump to jerk violently when the 

valve is closed) or too slowly and regulate manual valve or 

throttling device to correct this.

3.  Check all joints for leakage and correct if evident.

4.  Make certain the driver is operating satisfactorily as to tem-

perature, bearing temperature, etc., as prescribed by the driver 

manufacturer.

5.  Check for excessive vibration. If this is evident, shut down 

unit immediately and begin checking for the cause.

6.  If pump is equipped with packing, adjust the packing gland 

(see Sections G4.h and G4.i) to allow some leakage past the 

packing.

D3:   ROUTINE/NORMAL

1.  Start the pump in accordance with the starting equipment 

used.

2.  Driver lubricants should be checked following the instructions 

in the Motor O & M manual attached.

3.  The packing gland should be checked for proper leakage.

D4:   SHUTDOWN/EMERGENCY

1.  Shutdown in accordance with the starting equipment used. 

Refer to Section H (Trouble Shooting) for further instructions.

E:    FIELD TESTS

 

When  a  field  test  of  the  pump’s  performance  is  required, 

make the following readings: Volume, Total Head and Horsepower 

Measurements, Rotating Speed and Liquid Temperature. Compare 

the results of the field test with performance curve for your pump.
 

All volume, total head and efficiency guarantees are based 

on a shop test when handling clear, cold, fresh water at a tem-

perature not exceeding 85° F and under certain specified suction 

conditions.
(1)  Volume (Capacity) Measurement – Measure the rate of flow 

from the pump discharge in gallons per minute. The volume 

measurement may be made using any one of the following 

pieces of equipment: A calibrated Venturi meter, a thin-plate 

calibrated orifice, a calibrated pilot tube, or an accurately 

measured reservoir.

WARNING: If unit is equipped with VFD (Variable 

Frequency Drive), consult the factory for minimum and 

critical pump speeds before start-up.

Summary of Contents for VT Series

Page 1: ...ain that no rags wood scraps etc are lodged in any exposed openings Check pit depth and anchor bolt spacing with pump dimensions Lift and handle unit carefully to prevent bending strain damage caused by the hanging weight of the unit Do not lift any item by the shaft Take extra precautions when handling a mechanical seal or packing gland assembly since this is a delicate and precision component 2 ...

Page 2: ...ne correct sequence for installation of column lengths 1 Secure pipe clamp immediately beneath column coupling If column is flanged insert bolts and secure clamp below bottom of flange Clamp should keep bolts in position See Figure A5 3 1 2 Slide the lineshaft into bottom of column pipe and allow it to extend approximately 15 below the bottom end of the pipe Make certain the sleeve area of the lin...

Page 3: ... conjunction with oil tubing the top of the tubing should be approximately 11 4 inches below the tension box mounting face of the head after the flange is adjusted 5 Hoist head slightly Remove the clamp from the top piece of column Remove setting beams and clean surface of the foundation itself If there is an auxiliary line to the bowl bearing or thermo well that portion immediately below and atta...

Page 4: ...nue to tighten head nut until impellers are elevated a sufficient distance about 11 2 turns to accommodate pump hydraulic thrust and associated shaft stretch Align holes in head nut with taps in clutch install and tighten machine screws Place top cover on driver and secure 2 Solid Shaft Motor 2 a Slide the pump hub of the adjustable motor coupling onto the head shaft and insert the key Screw the a...

Page 5: ...tial servicing on the driver as recommended by the driver manufacturer Also perform initial servicing on all auxiliary assemblies if required 2 Recheck all fasteners and fittings for tightness 3 If the air release is manual or if air vent is automatic but equipped with a valve make certain the valve is opened partially but not all of the way 4 If there is a control valve on the discharge side of t...

Page 6: ... cutting the cross section with a chisel and prying one end inward until it is loose in the bore To install make a mandrel to fit the wear rings and press in with an arbor or screw press In an emergency the wear rings can be installed by gently and evenly tapping around the top edge with a wood block and a hammer or a rubber mallet 2 If impeller skirts are equipped with wear rings cut the wear rin...

Page 7: ...5 minutes and if leakage rate is more than desirable tighten the gland nuts 1 8 of a turn This packing adjustment is made with the pump running Before making another adjustment allow the packing to equalize against the increased pressure and the leakage to gradually decrease to a steady rate PUMP PACKING MUST ALWAYS LEAK SLIGHTLY Note 1 Chances are the packing will run a little warmer for the firs...

Page 8: ...mp Check operating vibration of the pump and compare to vibration check taken during initial inspection If vibration has changed shut down pump and inspect bowl assembly for damage or clogging Pump Foundation Check foundation for settling It may cause misalignment of pump and strain on discharge and suction piping Correct for any change in foundation Pump Performance Check discharge and suction pr...

Page 9: ... 7 Lubrication oil too heavy 8 Bent shaft 9 Tight bearing or packing 10 Specific gravity or viscosity of fluid higher than design 11 Worn pump 12 Damaged pump 13 Partial freezing of pump liquid ABNORMAL NOISE 1 Motor noise 2 Pump bearing running dry 3 Broken column bearing retainers 4 Broken shaft or oil tubing 5 Impeller dragging on bowl case 6 Cavitation due to insufficient N P S H A and or subm...

Page 10: ...place clean and assemble cor rectly 2 Face parallel and concentric H4 SHAFT AND COUPLING TROUBLE SOURCE PROBABLE CAUSE REMEDY Bent shaft Mishandling in transit or assembly Check straightness Correct to 005 ft total run out or replace Shaft coupling elongated neck down 1 Motor is started while pump running in reverse 2 Corrosion 3 Pipe wrench fatigue on reused couplings 4 Power being applied to sha...

Page 11: ... Insufficient lubrication 4 Incorrect type of packing 1 Repack correctly 2 Repack with the correct grade for service 3 Remachine or replace scored parts Packing wears prematurely 1 Improper packing 2 Insufficient lubrication 3 Shaft or sleeve scored 4 Incorrect type of packing 1 Remove cause 2 Replace worn parts 3 Remachine or replace I ORDERING PARTS Please contact your TACO representative with t...

Page 12: ... warranted by the motor manufacturer For complete details on motor warranty returns the purchaser should contact the motor manufacturer s local service repair center or contact the motor manufacturer directly Seals provided on commercial pumps are not covered by this warranty Any Taco product or part not installed or oper ated in conformity with Taco instructions or which has been subjected to mis...

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