CAMCORP SWF with Externally Mounted Fan User Manual
Page 42
3.
Belts tend to stretch somewhat after installation. Recheck
tension after several days of operation. Check sheave
alignment as well as setscrew and/or bushing bolt tightness.
COUPLING
Coupling alignment should be checked after installation and
prior to start up. Alignment is set at the factory, but shipping,
handling, and installation can cause misalignment. Also check
for proper coupling lubrication. For details on lubrication and
for alignment tolerances on the particular coupling supplied,
see the manufacturer's installation and maintenance supplement
in the shipping envelope.
Installation
Most nyb fans are shipped with the coupling installed. In cases
where the drive is assembled after shipping, install the coupling
as follows:
1.
Remove all foreign material from fan and motor shafts and
coat with machine oil for easy mounting of coupling halves.
2.
Mount the coupling halves on each shaft, setting the gap
between the faces specified by the manufacturer. Avoid
using force. If mounting difficulty is encountered, lightly
polish the shaft with emery cloth until the halves slide on
freely.
Alignment
1.
Align the coupling to within the manufacturer's limits for
parallel and angular misalignment (see Figure 2). A dial
indicator or laser can also be used for alignment where
greater precision is desired. Adjustments should be made
by moving the motor to change shaft angle, and by the use
of foot shims to change motor shaft height. Do not move
the fan shaft or bearing.
2.
When correctly aligned, install the flexible element and
tighten all fasteners in the coupling and motor base.
Lubricate the coupling if necessary.
3.
Recheck alignment and gap after a short period of opera-
tion, and recheck the tightness of all fasteners in the cou-
pling assembly.
Figure 2
START-UP
Safe operation and maintenance includes the selection and use
of appropriate safety accessories for the specific installation.
This is the responsibility of the system designer and requires
consideration of equipment location and accessibility as well as
adjacent components. All safety accessories must be installed
properly prior to start-up.
Safe operating speed is a function of system temperature and
wheel design. Do not under any circumstances exceed the
maximum safe fan speed published in the nyb engineering
supplement, which is available from your nyb field sales repre-
sentative.
Procedure
1.
If the drive components are not supplied by nyb, verify with
the manufacturer that the starting torque is adequate for
the speed and inertia of the fan.
2.
Inspect the installation prior to starting the fan. Check for
any loose items or debris that could be drawn into the fan
or dislodged by the fan discharge. Check the interior of the
fan as well. Turn the wheel by hand to check for binding.
3.
Check drive installation and belt tension.
4.
Check the tightness of all setscrews, nuts and bolts. When
furnished, tighten hub setscrews with the wheel oriented
so that the setscrew is positioned underneath the shaft.
5.
Install all remaining safety devices and guards. Verify that
the supply voltage is correct and wire the motor. “Bump”
the starter to check for proper wheel rotation.
6.
Use extreme caution when testing the fan with ducting dis-
connected. Apply power and check for unusual sounds or
excessive vibration. If either exists, see the section on
Common Fan Problems. To avoid motor overload, do not
run the fan for more than a few seconds if ductwork is not
fully installed. On larger fans, normal operating speed may
not be obtained without motor overload unless ductwork is
attached. Check for correct fan speed and complete instal-
lation. Ductwork and guards must be fully installed for safety.
7.
Setscrews should be rechecked after a few minutes, eight
hours and two weeks of operation (see Tables 1 & 2 for
correct tightening torques).
NOTE: Shut the fan down immediately if there is any sud-
den increase in fan vibration.
Page 3
BEFORE INITIAL OPERATION:
1. TIGHTEN ALL SET
SCREWS
IN FAN WHEEL.
2. TIGHTEN ALL SET
SCREWS
IN BEARINGS.
3. REPEAT AFTER 8 HOURS
OF OPERATION.
4. REPEAT AGAIN AFTER
TWO WEEKS OPERATION.
98-0271