Xylem IM010 R08 Model 3656/3756 - Manual (Page 7)

7
• Reach into pump suction opening and rotate impeller slightly
until the shaft will engage the coupling. Verify that there is
no gap between bracket and flywheel housing faces. Rotate
pump as necessary to align bracket holes with engine. Install
capscrews and bolt pump end securely to engine.
NOTE: If any interference, or incompatibility of parts is
detected during installation, DO NOT proceed with
assembly. Direct the problem to your nearest Goulds
Pumps distributor.
• Mount the pump to the engine using the bolts and lock-
washers provided, torqued as follows in a crossing sequence:
SAE #2, #3, #4, #5 – 20 lbs.-ft. (27 N.m)
SAE #1 – 50 lbs.-ft. (68 N.m)
• Install coupling guards (501N).
• Bolt motor adapter (3) to the rigid support described above.
Coupling Alignment
FAILURE TO DISCONNECT AND
LOCKOUT ELECTRICAL POWER
BEFORE ATTEMPTING ANY
MAINTENANCE CAN CAUSE
SEVERE PERSONAL INJURY.
FRAME-MOUNTED UNITS ONLY
• Alignment MUST be checked prior to running. See Figure 7.
Figure 7
• Tighten all hold-down bolts before checking alignment.
• If realignment is necessary, always move the motor. Shim
as required.
• Parallel misalignment, shafts with axis parallel but not
concentric. Place dial indicator on one hub and rotate this
hub 360° while taking readings on the outside diameter of
the other hub. Parallel alignment is achieved when reading is
0.010" (0.254 mm) TIR, or less.
• Angular misalignment, shaft with axis concentric but not par-
allel. Place dial indicator on one hub and rotate this hub 360°
while taking readings on the face of the other hub. Angular
alignment is achieved when reading is 0.020" (0.508
mm) TIR, or less.
• Final alignment is achieved when parallel and angular re-
quirements are satisfied with motor hold-down bolts tight.
NOTICE: ALWAYS RECHECK BOTH ALIGNMENTS
AFTER MAKING ANY MECHANICAL
ADJUSTMENTS.
Piping
• Piping should be no smaller than pump’s discharge and
suction connections and kept as short as possible, avoiding
unnecessary fittings to minimize friction losses. See Table 1.
• All piping MUST be independently supported and MUST
NOT place any piping loads on the pump
NOTICE: DO NOT FORCE PIPING INTO PLACE
AT PUMP SUCTION AND DISCHARGE
CONNECTIONS.
• All pipe joints MUST be airtight.
PIPING – SUCTION
• For suction lifts over 10 ft. (3 m) and liquid temperatures
over 120° F (49° C), consult pump performance curve for
net positive suction head required (NPSH
R
).
• If a pipe size larger than pump suction is required, an ec-
centric pipe reducer, with the straight side up, MUST be
installed at the pump suction.
• If pump is installed below the liquid source, install a gate
valve in the suction for pump inspection and maintenance.
NOTICE: DO NOT USE THE GATE VALVE TO
THROTTLE PUMP. THIS MAY CAUSE LOSS
OF PRIME, EXCESSIVE TEMPERATURES
AND DAMAGE TO PUMP, VOIDING
WARRANTY.
• If the pump is installed above the liquid source, the following
MUST be provided:
• To avoid air pockets, no part of the piping should be above
the pump suction connection.
• Slope the piping upward from liquid source.
• Use a foot valve or check valve ONLY if necessary for
priming or to hold prime during intermittent duty.
• The suction strainer or suction bell MUST be at least
3 times the suction pipe diameter area.
• Insure that the size and minimum submergence over suc-
tion inlet is sufficient to prevent air from entering pump
through a suction vortex. See Figures 8 through 11.
PIPING – DISCHARGE
• Install a check valve suitable to handle the flow, liquids and
to prevent backflow. After the check valve, install an ap-
propriately sized gate valve to be used to regulate the pump
capacity, pump inspection and for maintenance.
• When required, pipe increaser should be installed between
the check valve and the pump discharge.
Hazardous machinery
can cause personal
injury or death.
WARNING
Parallel
Angular
Figure 10 Figure 11
H min.
D D
H min.
D D
1.5D
min.
3.0D
min.
H min.
D min.
2
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
H = Min. Submergence in feet
H
1 2 3 4 5 6 7 8 9 10111213141516 V
V = Velocity in feet per second
= GPM x 0.321
Area
GPM x 0.4085
D 2
Figure 8 Figure 9