Rotation; Operation; Maintenance; Disassembly - Xylem RED JACKET SM Manual Del Usuario

4.2. If an increaser is required, place between check valve
and pump.
4.3. Use 3 to 4 wraps of Teflon tape to seal threaded
connections.

5. Rotation

5. Rotation
5.1. Correct rotation is right-hand (clockwise when
viewed from the motor end). Switch power on and
off quickly. Observe shaft rotation. To change rotation:
5.1.1. Single-phase motor: Non-reversible
5.1.2. Three-phase motor: Interchange any two
power supply leads.

6. Operation

6. Operation
Pumped liquid provides lubrication. If
CAUTION
pump is run dry, rotating parts will seize
and mechanical seal will be damaged. Do not operate
at or near zero flow. Energy imparted to the liquid is
converted into heat. Liquid may flash to vapor. Rotating
parts require liquid to prevent scoring or seizing.
6.1. Before starting, pump must be primed (free of air
and suction pipe full of liquid) and discharge valve
partially open.
6.2. Make complete check after unit is run under
operating conditions and temperature has stabilized.
Check for expansion of piping.

7. Maintenance

7. Maintenance
7.1. Ball bearings are located in and are part of the motor.
They are permanently lubricated. No greasing required.

8. Disassembly

8. Disassembly
Complete disassembly of the unit will be described. Pro-
ceed only as far as required to perform the maintenance
work required.
8.1 Turn off power.
8.2 Drain system and flush if necessary.
8.3 Remove motor hold-down bolts.
8.4. Disassembly of Liquid End
8.4.1. Remove casing bolts (370).
8.4.2. Remove back pull-out assembly from casing (100).
8.4.3. Remove impeller locknut (304).
Do not insert screwdriver between impel-
CAUTION
ler vanes to prevent rotation of close-
coupled units. Remove cap at opposite end of motor. A
screwdriver slot or a pair of flats will be exposed. Using
them will prevent impeller damage.
8.4.4. Remove impeller (101) by turning counter-
clockwise when looking at the front of the
pump. Protect hand with rag or glove.
Failure to remove the impeller in a
CAUTION
counter-clockwise direction may damage
threading on the impeller, shaft or both.
8.4.5. With two pry bars 180 degrees apart and
inserted between the seal housing (184) and
the motor adapter (108), carefully separate the
two parts. The mechanical seal rotary unit
(383) should come off shaft with the seal
housing.
8.4.6. Push out the mechanical seal stationary seat
from the motor side of the seal housing.
4

9. Reassembly

9. Reassembly
9.1. All parts should be cleaned before assembly.
9.2. Refer to parts list to identify required replacement
items. Specify pump index or catalog number when
ordering parts.
9.3. Reassembly is the reverse of disassembly.
9.4. Observe the following when reassembling the
liquid-end:
9.4.1. All mechanical seal components must be in
good condition or leakage may result. Replace
ment of complete seal assembly, whenever seal
has been removed, is good standard practice.
It is permissible to use a light lubricant, such as
glycerin, to facilitate assembly. Do not contaminate
the mechanical seal faces with lubricant.
9.4.2. Inspect casing O-ring (513) and replace if
damaged. This O-ring may be lubricated with
petroleum jelly to ease assembly.
9.5. Check reassembled unit for binding. Correct as
required.
9.6. Tighten casing bolts in a star pattern to prevent
O-ring binding.
10. Troubleshooting Chart
10. Troubleshooting Chart
MOTOR NOT RUNNING
(See causes 1 through 6)
LITTLE OR NO LIQUID DELIVERED
(See causes 7 through 17)
POWER CONSUMPTION TOO HIGH
(See causes 4, 17, 18, 19, 22)
EXCESSIVE NOISE AND VIBRATION
(See causes 4, 6, 9, 13, 15, 16, 18, 20, 21, 22)
PROBABLE CAUSE:
1. Tripped thermal protector
2. Open circuit breaker
3. Blown fuse
4. Rotating parts binding
5. Motor wired improperly
6. Defective motor
7. Not primed
8. Discharge plugged or valve closed
9. Incorrect rotation
10. Foot valve too small, suction not submerged, inlet
screen plugged.
11. Low voltage
12. Phase loss (3-phase only)
13. Air or gasses in liquid
14. System head too high
15. NPSHA too low:
Suction lift too high or suction losses excessive.
Check with vacuum gauge.
16. Impeller worn or plugged
17. Incorrect impeller diameter
18. Head too low, causing excessive flow rate
19. Viscosity or specific gravity too high
20. Worn bearings
21. Pump or piping loose
22. Pump and motor misaligned