NAKS 28B-DBFF-1500 Manual

NAKS Emhætte 28B-DBFF-1500

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Side 1/6

RECEIVING AND INSPECTION

Immediately upon receipt of a shipment, carefully inspect for damage

and shortage. Turn the impeller by hand to see that it turns freely

and does not bind. If any damage and/or shortage is detected or

suspected, the carrier must be asked to conduct an inspection. The

consignee’s representative should not accept a shipment without a

notation on the delivery receipt indicating items not delivered or the

apparent extent of damage.

When a shipment is opened and damage is found which was not

evident externally (concealed damage), it is mandatory that the

consignee request an immediate inspection by the carrier. Report any

damage to the carrier within 15 days. Failure to report damage within

the above time limit will result in rejection of a claim.

HANDLING

When handling fans and their accessories, always use equipment and

methods that will not cause damage. Fans should be lifted using slings

and padding or spreaders to avoid damage.

CAUTION! Always make sure that all lifting and handling equipment

and techniques conform to current safety standards.

Avoid lifting fans in a way that will bend or distort fan parts. Never pass

slings or timbers through the fan orice.

CAUTION! Do not lift by the fan hood. Fans with special coatings or

paints must be protected in handling to prevent damage.

STORAGE

Fans are protected against damage during shipment. If they cannot

be installed and put into operation immediately upon receipt certain

precautions are necessary to prevent deterioration during storage.

Responsibility for integrity of fans and accessories during storage must

be assumed by the user. The manufacturer will not be responsible

for damage during storage. These suggestions are provided solely as

a convenience to the user, who shall make his own decision as to

whether to use any or all of them.

INDOOR: The ideal storage environment for fans and accessories is

indoors, above grade, in a low humidity atmosphere which is sealed to

prevent the entry of blowing dust, rain, or snow. Temperatures should

be evenly maintained between 70°F and 105°F (wide temperature

swings may cause condensation and “sweating” of metal parts).

Windows should be covered to prevent temperature variations caused

by sunlight. Provide thermometers and humidity indicators at several

points and maintain the atmosphere at 40% relative humidity, or lower.

It may be necessary to use trays of renewable desiccant or portable

dehumidier to remove moisture from the air in the storage enclosure.

Thermostatically controlled portable heaters (vented to outdoors) may

be required to maintain even temperatures inside the enclosure.

CAUTION! Provide re extinguishers, or re alarms, or emergency

response communication to protect building and equipment against

re damage. Be sure that building and storage practices meet all local,

state and federal re and safety codes.

The following fans or accessories must be stored indoors, in a clean

dry atmosphere:

a. Propeller wall fans not in wall housings.

b. Any fan protected by a cardboard carton.

c. Motors dismounted from fans.

d. Spare wheels or propellers.

e. Belts, sheaves, bushings and other parts when not

mounted on fan.

f. Boxes, bags or cartons of hardware.

g. Curbs

h. Dampers

Remove any accumulations of dirt, water, ice or snow and wipe dry

before moving to indoor storage. Allow cold parts to reach room

temperature to avoid “sweating” of metal parts. Open boxes or cartons.

Remove any accumulated moisture; if necessary use portable electric

heaters to dry parts and packages. Leave coverings loose to permit air

circulation and to permit periodic inspection.

Rotate wheels or propellers by hand to distribute bearing grease over

the entire bearing surfaces.

Store at least 3 ½” off the oor on wooden blocks covered with moisture

proof paper or polyethylene sheathing. Provide aisles between parts

and along all walls, to permit air circulation and space for inspection.

OUTDOOR: Fans designed for outdoor use may be stored outdoors,

if absolutely necessary. The storage area should be reasonably level

and drained or ditched to prevent accumulation of water. Fencing and

lighting for security are desirable. Roads or aisles for portable cranes

and hauling equipment are needed. Consider the use of drift fencing

to minimize accumulation of blowing snow or dirt.

The following fans may be stored outdoors, if dry indoor storage space

is not available:

a. Fans intended for outdoor use that are crated in wood.

b. Wall fans installed in wall housings.

All fans must be supported on wooden blocks or timbers above water

or normal snow levels. Provide enough blocking to prevent settling into

soft ground. Fans should be set in place using the directional arrow

markings on the crate as a guide.

Locate pieces far enough apart to permit air circulation, sunlight, and

space for periodic inspection. Place all parts on their supports so that

rain water will run off, or to minimize water accumulation. Do not cover

parts with plastic lm or tarps-these cause condensation of moisture

from the air passing through heating and cooling cycles.

Fan wheels and propellers should be blocked to prevent spinning

caused by strong winds.

INSPECTION AND MAINTENANCE DURING STORAGE

Inspect fans and accessories at least once per month, while in storage.

Log results of inspection and maintenance performed. A typical log

entry should include the following:

a. Date

b. Inspector’s Name

c. Name of Fan

d. Location

e. Condition of Paint or Coating

f. Is moisture present?

g. Is dirt accumulated?

h. Corrective steps taken?

INSTALLATION & MAINTENANCE INSTRUCTIONS

Models 10B-DB, 20B-DB, 28B-DB, 36B-DB, 48B-DB, 52B-DB

Read and Save These Instructions

NAKS Form 613162

_________________________________________________________________________________________________________________________

2017 © North American Kitchen Solutions

172 Reaser Court, Elyria, OH 44035

Toll Free: (800) 715-1014

customerservice@naksinc.com

Page 1 of 6

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 specically 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 orice, 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 orice 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 overll 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.

_________________________________________________________________________________________________________________________

172 Reaser Court, Elyria, OH 44035

Toll Free: (800) 715-1014

customerservice@naksinc.com

Page 2 of 6

Produkt Specifikationer

Mærke:	NAKS
Kategori:	Emhætte
Model:	28B-DBFF-1500

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