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If moisture or dirt accumulations are found on parts, the source should
be located and eliminated. Fans should be rotated at each inspection
by hand ten to fteen revolutions to redistribute the motor and bearing
lubricant.
If paint deterioration begins, consideration should be given to touch-
up or repainting. Fans with special coatings may require special
techniques for touch-up or repair.
Machined parts coated with rust preventive should be restored to good
condition promptly if signs of rust occur. The most critical items are
pulleys, shafts and bearing locking collars. At the rst sign of rusting
on any of the above parts, remove the original rust preventive coating
with petroleum solvent and clean lint-free cloths. Polish any remaining
rust from surfaces with crocus cloth or ne emery paper and oil. Do
not destroy the continuity of the surfaces. Wipe clean with lint-free
cloths and recoat surfaces evenly and thoroughly with Tectly 506
(Ashland Oil Company) or equal. For hard to reach internal surfaces
or for occasional use, consider using Tectly 511M Rust Preventive or
WD40 or equal.
REMOVING FROM STORAGE
As fans are removed from storage to be installed in their nal location,
they should be protected and maintained in similar fashion, until the
fan equipment goes into operation.
INSTALLATION
1. CAUTION! This unit has rotating parts and safety precautions
should be exercised during installation, operation and
maintenance.
2. WARNING! Do not use in hazardous environments where
fan’s electrical system could provide ignition to combustible
or ammable materials, unless unit is specically built for
hazardous environments.
3. WARNING! If gases, other than clean air, are to be exhausted
using the fan, then the user bears the responsibility of determining
that the fan is appropriate and safe for the application.
4. If the fan manufacturers prefab curb is used, a ange is provided
for mounting the damper. Damper should be installed before
setting exhauster.
5. If damper box is being used, assemble box and mount in curb
before setting exhauster. Damper may be installed at this time
if desired. Damper should be fastened to the bottom of the
damper box, curb anges or nailing strips in curb.
6. Remove motor compartment cover and mount motor onto drive
base. (Larger motors are shipped not mounted because of the
possibility of shipping damage.)
Refer to Figure 1 for sizes 10-52. The motor is mounted directly
to the slots on the drive base using the four motor mount bolts
with their nuts. For sizes 10-52 motors with 1½” (38mm) shaft
length use upper set of slots on the drive base. For motors with
shaft longer than 1½” (38mm) use lower set of slots on the drive
base. Belt tensioning is brought about by sliding the motor away
from the fan pulley and then tightening the motor mount bolts
and nuts.
Belt should depress its width when pressed rmly inward at
midway point between the pulleys. Connect the wiring and
conduit, if used, from the disconnect switch to the motor.
7. Turn impeller by hand to make sure it rotates freely. If impeller
hits orice, adjust as follows:
For fans with duplex split pillow block bearings, 3-dimensional
adjustment is provided. Horizontal movement for adjustment is
allowed by four (4) bolts in the separator pan. Loosen the four
nuts in the outer edge (one in each quadrant) of the separator
pan for adjustment in all horizontal positions, re-tighten the four
nuts. Vertical movement for adjustment is allowed by two (2)
slots in the motor base bearing housing at the top and bottom.
The set screws can be loosened and the shaft can be raised or
lowered. Then the set screws must be re-tightened following the
set screw tightening procedure in Table 1.
Fans with unitary pillow block bearings have the same
adjustment capability and is accomplished in the same manner
as described above with one exception. The vertical adjustment
is carried out by loosening the bearing set screws and carefully
sliding the fan shaft to a new location. Tighten all bearing set
screws (see Table 1 for torque recommendations) into the fan
shaft when complete.
WARNING! Do not damage the orice when adjusting the
wheel.
8. CAUTION! Guards must be installed when fan is within reach of
personnel or within eight (8) feet (2.5m) of working level or when
deemed advisable for safety.
9. CAUTION! Before proceeding, make sure electrical service to
fan is locked in “OFF” position.
10. All wiring should be in accordance with local ordinances
and the National Electric Code.
11. WARNING! Check voltage at the fan to see if it corresponds
with the motor nameplate. High or low voltage can seriously
damage the motor. Extra care should be taken when wiring
two speed motors since improper connections will damage
motor and void motor warranty. Leave enough slack in
wiring to allow for motor movement when adjusting belt
tension.
12. Apply power momentarily and compare the rotation of the
impeller with the directional arrow on fan. Wheel rotation is
clockwise as viewed from drive side. WARNING! Operation
in the wrong direction will deliver air but will overload the
motor to the extent of blowing fuses, and seriously damaging
the motor. In the case of three phase motors, the direction
can be changed by interchanging any two of the three motor
leads. In the case of single phase motors, the reversing
instructions will appear on the wiring diagram in the motor
wiring compartment.
13. Using a minimum of eight (8) lag bolts - two (2) on each side
near corners, securely fasten fan to curb. Fasten all bolts
securely. The fan should rest on the curb as level as
possible.
MAINTENANCE
1. Under normal usage, no spare parts are recommended for one
year of operation. Recommended spare parts are shown on
page 4.
CAUTION! Before proceeding, make sure electrical service to
fan is locked in “OFF” position.
WINDMILLING: Even when the power supply is locked out,
fans may cause injury or damage if the impeller is subject
to “windmilling” which is the turning of the impeller and drive
components due to a draft in the system. To guard against this
hazard, the impeller should be secured to physically restrict
rotational movement.
2. Impeller shaft bearings on units with duplex split pillow block
housing are permanently lubricated and do not require
relubrication. Units with unitary pillow block bearing have grease
ttings and, under normal operation will need no relubrication for
3 to 5 years. If relubrication is required, use a grease conforming
to NLGI No. 2. CAUTION! Lubricating bearings with a high
pressure gun can blow bearing seals and overll the bearing
with grease. This condition can result in excessive churning and
overheating. For normal operating conditions it is a standard
practice to ll only 30% of the bearing void with grease. Do not
over lubricate.
_________________________________________________________________________________________________________________________
2017 © North American Kitchen Solutions
172 Reaser Court, Elyria, OH 44035
Toll Free: (800) 715-1014
customerservice@naksinc.com
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Productinformatie
| Merk | NAKS |
| Model | 52B-DBFF-4000 |
| Categorie | Afzuigkap |
| Taal | Nederlands |
| Grootte | 929 MB |
