Discharge Piping; Rotation; Operation; Maintenance - Xylem Goulds MCC Instrucciones De Instalación, Funcionamiento Y Mantenimiento

3.2. Suction pipe must be at least as large as the suction
connection of the pump. Smaller size will degrade
performance.
3.3. If larger pipe is required, an eccentric pipe reducer
(with straight side up) must be installed at the pump.
3.4. Installation with pump below source of supply:
3.4.1. Install full flow isolation valve in piping for
inspection and maintenance.
Do not use suction isolation valve to
CAUTION
throttle pump.
3.5. Installation with pump above source of supply:
3.5.1. Avoid air pockets. No part of piping should be
higher than pump suction connection. Slope
piping upward from liquid source.
3.5.2. All joints must be airtight.
3.5.3. Foot valve to be used only if necessary for
priming, or to hold prime on intermittent
service.
3.5.4. Suction strainer open area must be at least
triple the pipe area.
3.6. Size of inlet from liquid source, and minimum
submergence over inlet, must be sufficient to prevent
air entering pump through vortexing. See Figures 1
through 4.
3.7. Use 3 to 4 wraps of Teflon tape to seal threaded con-
nections.
H min.
D
Figure 1
3.0D
min.
1.5D
H min.
min.
D min.
D D
2
Figure 3
4. 4 . 4. 4. 4. 4. 4. 4. 4. 4.

4. DISCHARGE PIPING

4 D D D D D D D D D D D IS IS IS IS IS IS IS ISCH IS IS IS CH CH CH CH CH CH CHAR CH CH CH AR AR AR AR AR AR ARGE AR AR AR GE GE GE GE GE GE GE GE GE GE P P P P P P P P P P P IP IP IP IP IP IP IPIN IP IP IP IP ING IN IN IN IN IN IN IN IN IN
4.1. Arrangement must include a check valve located
between a gate valve and the pump. The gate valve
is for regulation of capacity, or for inspection of the
pump or check valve.
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 con-
nections.
4
H min.
D
Figure 2
H
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1 2 3 4 5 6 7 8 9 10111213141516
V = Velocity in feet per second
= GPM x 0.321 GPM x 0.4085
2
Area D
Figure 4
G G G G G G G G G G
5 . 5. 5 5. 5. 5. 5. 5. 5. 5. 5.

5. ROTATION

R R R R R R R R R R R OT OT OTAT OT OT OT OT OT OT OT OT AT AT AT AT AT ATIO AT AT AT AT IO IO IO IO IO IO IO IO ION IO N N N N N N N N N N
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 rota-
tion:
5.1.1. Single-phase motor: Non-reversible
5.1.2. Three-phase motor: Interchange any two
power supply leads.

6. OPERATION

6 6. 6. 6 . 6 6 6 . 6. 6 . 6. 6 O O O O O O O O O O O PE PERA PE PE PE PE PE PE PE PE PE RA RA RA RA RA RATI RA RA RA RA TI T TI TI TI TI TI TI TI TI ON ON ON ON ON ON ON ON ON ON ON
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 operat-
ing conditions and temperature has stabilized. Check
for expansion of piping.
7. 7. 7.

7. MAINTENANCE

7. 7. 7. 7. 7. 7. 7. 7. M M M M M M M M M M M AI AI AI AI AI AI AINT AI AI AI AI NT NT NT NT NT NT NT NTEN NT NT ENAN EN EN EN EN EN EN EN EN EN AN AN AN AN AN AN ANCE AN AN AN
7.1. Ball bearings are located in and are part of the mo-
tor. They are permanently lubricated. No greasing
required.
8 . 8 8 8. 8. 8. 8. 8. 8. 8.

8. DISASSEMBLY

8. D D D D D D D D D D D ISAS IS IS IS IS IS IS IS IS IS IS AS AS ASSE AS AS AS AS AS AS AS SE SE SEMB SE SE SE SE SE SE SE MB MB MB MB MB MB MB MB MBLY MB LY LY LY LY LY LY LY LY LY LY
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).
V
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
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