Acme Engineering PNURF Installation Manual

Read and Save These Instructions

Form 613115

INSTALLATION & MAINTENANCE INSTRUCTIONS

Models PNURG, PNURF, USNURG, and USNURF

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 represen
tative should not accept shipment without a notation on the
delivery receipt indicating items not delivered or apparent
extent of damage.

When a shipment is opened and damage is found which
was not evident externally (concealed damage), it is man
datory that the consignee request an immediate inspection
by the carrier. Report damage to the carrier within 15 days.
Failure to report damage within the above time limit will
cause 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 orifices of fan.

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 dam
age during storage. These suggestions are provided solely
as a convenience to the user, who shall make his own deci
sion as to whether to use any or all of them.

INDOOR: The ideal storage environment for fans and ac
cessories is indoors, above grade, in a low humidity atmo
sphere which is sealed to prevent the entry of blowing dust,
rain, or snow. Temperatures should be evenly maintained
at between 70°F and 105°F (wide temperature swings may
cause condensation and "sweating" of metal parts). Win
dows should be covered to prevent temperature variations
caused by sunlight. Provide thermometers and humidity in
dicators 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 dehumidifier to remove moisture from the air in the
storage enclosure.

Thermostatically controlled portable heaters (vented to out
doors) may be required to maintain even temperatures in

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side the enclosure.

CAUTION! Provide fire extinguishers, or fire alarms, or
telephone to protect building and equipment against fire
damage. Be sure that building and storage practices meet
all local, state and federal fire 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 which is protected by a cardboard carton.

c. Motors dismounted from fans.

d. Spare wheels or propellers.

e. The 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 indoor storage. Allow cold parts to
reach room temperature to avoid “sweating” of metal parts.
Open boxes or cartons. Remove any accumulated mois
ture; if necessary use portable electric heaters to dry parts
and packages. Leave coverings loose to permit air circula
tion 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 floor on wooden blocks covered
with moisture proof paper or polyethylene sheathing. Pro
vide 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 accu

mulation of water. Fencing and lighting for security are de

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sirable. Roads or aisles for portable cranes and hauling

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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:

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a. Fans intended for outdoor use that are crated in

wood.

b. Wall fans where installed in wall housings.

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All fans must be supported on wooden blocks or timbers
above water or normal snow levels. Provide enough block
ing 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, sun
light, 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 film 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 per
formed. 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?

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 fifteen 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 re
stored to good condition promptly if signs of rust occur. The
most critical items are pulleys, shafts and bearing locking
collars. At the first 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 fine emery paper and oil.
Do not destroy the continuity of the surfaces. Wipe clean
with lint-free cloths and recoat surfaces evenly and thor
oughly with Tectly 506 (AshlandOil Company) or equal. For
hard to reach internal surfaces or for occasional use, con
sider using Tectly 511M RustPreventive or WD40 or equal.

REMOVING FROM STORAGE

­As fans are removed from storage to be installed in their fi

nal location, they should be protected and maintained in
similar fashion, until the fanequipment goes into operation.

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1.

CAUTION! This unit has rotating parts and safety

INSTALLATION

precautions should be exercised during installation,
operation and maintenance.

2.

WARNING! Do not use in hazardous environments
where the fan's electrical system could provide ignition
to combustible or flammable materials, unless the unit
is specifically built for hazardous environments.

3.

WARNING! If gases, other than clean air, are to be
exhausted using the fan, then the user bears the

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responsibility of determining that the fan is appropriate
and safe for the application.

4.

COMMERCIAL KITCHEN EXHAUST APPLICATIONS:

Ventilators should be installed in accordance with the
requirements of the National Fire Protection
Association Bulletin NFPA96 “Vapor Removal From
Cooking Equipment” taking specific note of the
following:

(a) Ducts terminating into the base of an up-discharge

exhaust fan shall be constructed of carbon steel
not less than 16 MSG (1.6 mm) and extend a
minimum of 18" (457 mm)above the roof surface.

(b) Air velocity through the duct shall not be less than

1500 FPM (7.620 m/s).

(c) A minimum of 40" (1016 mm) clearance shall be

maintained between the exhaust discharge and
the roof surface. (To comply Sizes 120 through
300 require 18" [457 mm] roof curb.)

(d) Fan Discharge shall be a minimum of 10 feet from

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the fresh air intake.

5. GREASE TROUGH ACCESSORY: A container to
collect residue grease should be located under the
grease drain on the ventilator to prevent accumulation
of grease on the roof surface. An accessory grease
trough that attaches to the curb is available from the
manufacturer at extra cost. Containers should be

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serviced at regular intervals to prevent overflow. Curb
Hinges are also available as an optional accessory.

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Installation instructions are shipped with the
accessories.

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6. FAN INSTALLATION:

(a) WALL MOUNT (120-245): If wall mounted,

provide an opening sufficient for enclosing the curb
cap. Securely fasten to the wall through the cap.
Fan breather tube should be on the side of the fan

at a 90° angle from vertical. A wall mounting
adapter option is available from the manufacturer.
Refer to Form 613121 included with the adapter
for instructions. (see figure 1)

Fig. 1

(b)

ROOF MOUNT (120-490): Roof exhausters
should be mounted on a roof curb suitable for the
purpose, either field fabricated or prefab type.
Prefab type curbs are available as an accessory at
extra cost from the manufacturer. The fan should
rest on the curb as level as possible. When curb is
not level (slightly pitched on flat roofs) the down
spout drain fitting should be located on the lowest
side of the curb. Securely fasten the exhauster to
the curb using a minimum of 4 lag bolts.

7.

CAUTION! Guards must be installed when the fan is
within reach of personnel or within eight (8) feet (2.5 m)
of working level or when deemedadvisable for safety.

to be moved vertically. Make sure all bolts are securely
tightened before applying electrical power.

For 245 through 490 with duplex split pillow block
bearings, three dimensional adjustment is also
provided. Horizontal movement is allowed by
loosening the bolts holding the bearing base (18) to the
bottom of the motor enclosure base (10). Re-tighten
bolts after adjusting. Vertical adjustment is allowed by
loosening the bolts in the bearing cap (22) which allow
the entire bearing housing to be moved vertically.

9. MOTOR - BELT TENSION ADJUSTMENT: For sizes
120 through 200, the motor is mounted directly to the
slots on the Drive Base using the four motor mount
bolts. Belt tensioning is accomplished by sliding the
motor away from the fan pulley and then tightening the
motor mount bolts and nuts. Some sizes use motor
rails for certain motors.

For sizes 245 through 490, the motor is mounted on a
separate motor base. Belt tensioning is accomplished
by sliding the motor base away from the fan pulley and
then tightening the motor base bolts and nuts.

Belt should depress its width when pressed firmly
inward at midway point between the pulleys.

10.

CAUTION! Before proceeding, make sure electrical
service to fanis locked in the “OFF” position. Run wires
through the internal wiring post to the motor ( or to the
disconnect switch). (Restaurant exhaust fans have
wires run through the wiring post to the exterior of the
windband.)

11. All wiring should be in accordance with local
ordinances and the National Electric Code.

8. IMPELLER-ORIFICE ADJUSTMENT: Turn centrifugal
impeller by hand to make sure it rotates freely. If the
impeller hits the orifice, adjust as follows:

For 120 through 200 with duplex split pillow block
bearings, three dimensional adjustment is provided.
Do not loosen all bolts at once. Proceed with
adjustments in one direction at a time to minimize
difficulty. Horizontal movement for adjustment is
allowed by loosening the two bolts connecting the drive
brace (4) to the top and bottom flange of the drive
base (3) and by loosening the four bolts, two at each
end, of the drive base (3). Horizontal movement in the
other direction is allowed by loosening the four bolts
securing the bearing caps (6) to the drive base (3).
After loosening the appropriate bolts, the impeller can
be repositioned to insure that it does not strike the
orifice. Vertical adjustment is allowed by loosening the
set screw on the impeller hub which allows the impeller

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12. 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 to motors since improper
connections will damage the motor and void the motor
warranty.

13.

WARNING! Do not operate at speeds higher than
shown in the catalog for this equipment. Apply power
momentarily and compare the impeller rotation with the
directional arrow. Operation in the wrong direction will
deliver air but may overload the motor to the extent of
blowing fuses or overload protection and could
seriously damage 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 or
on the motor.