Acme Engineering PV Installation Manual

FORM 613097

Read and Save These Instructions

INSTALLATION & MAINTENANCE INSTRUCTIONS

Models PV and USPV

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 orifice.

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 dehumidifier 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 fire extinguishers, or fire alarms, or
emergency response communication 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 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 floor 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 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
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?

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
restored 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
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 final
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 flammable materials, unless unit is
specifically built for hazardous environments.

3. If the fan manufacturers prefab curb is used, a flange is
provided for mounting the damper. Damper should be
installed before setting exhauster.

4. 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 flanges or nailing strips
in curb.

5. 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 75-240. The motor is mounted
directly to the slots on the drive base using the four
motor mount bolts with their nuts. For sizes 75-135,
motors with 1
slots on the drive base. For motors with shaft longer than

1

" (38mm) use lower set of slots on the drive base.

1

2

Belt tensioning is brought about by sliding the motor

1

" (38mm) shaft length use upper set of

2

away from the fan pulley and then tightening the motor
mount bolts and nuts.

Belt should depress its width when pressed firmly inward
at midway point between the pulleys. Connect the wiring
and conduit, if used, from the disconnect switch to the
motor.

For fan sizes 260 through 543, refer to Figure 2. Motor
adjustment rails are provided. Most motors for these
sizes are shipped separately. The motor is to be bolted
to the motor adjustment rails using the motor mount
bolts, nuts and washers. Install belt(s) and check for
tension. Belt tensioning is accomplished by loosening the
motor adjustment rail bolts and nuts, and also the belt
jack locknut. The two (2) belt jack bolts are then turned
clockwise to tighten the belt. After proper belt tension is
reached, the motor adjustment rail bolts and nuts and
belt jack locknuts must be tightened. The proper belt

tension is described above. The electrical wiring
connections can now be made and the flexible steel
conduit (where used) may be connected to the motor.

6. Turn impeller by hand to make sure it rotates freely. If
impeller hits orifice, adjust as follows:

For fans with duplex split pillow block bearings,
3-dimentional 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 orifice when adjusting
the wheel.

7. CAUTION! Guards must be installed when fan is within
reach of personnel or within seven (7) feet (2.134m) of
working level or when deemed advisable for safety.

8. CAUTION! Before proceeding, make sure electrical
service to fan is locked in “OFF” position.

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

10. 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.

11. Apply power momentarily and compare the rotation of
the impeller with the directional arrow on fan.
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.

12. 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 pages 4 and 5.

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

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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 fittings 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 overfill the bearing with
grease. This condition can result in excessive churning
and overheating. For normal operating conditions it is a
standard practice to fill only 30% of the bearing void with
grease. Do not over lubricate.

3. Motor bearings are prelubricated. Consult information
printed on motor for lubrication instructions.

4. Check belt tension after first 48 hours of operation and
thereafter annually. Belt should depress its width when
pressed firmly inward at midway point between the
pulleys. Too much tension will damage bearings. Belt
should be tight enough to prevent slippage. When
replacing worn belt, replace motor pulley if “shoulder” is
worn in groove.

WARNING! Do not replace the motor pulley with a
larger diameter pulley. Do not replace the fan pulley with
one smaller in diameter. The pulley ratios are set so that
the motor will not be overloaded. Do not operate at
speeds higher than that cataloged for this equipment.

5. If impeller shaft bearings need replacement, replace with
bearings comparable to the original equipment. If duplex
split pillow block bearings are used, install new bearings
into neoprene rings, check correct position of impeller
with orifice, position bearings in die-formed recess and
tighten set screws. (Minimum/maximum torque settings
shown in Table 1.) Replace die-formed bearing cap and
tighten four bolts.

NOTE: If locking collar type bearing is used, collar must
first be positioned against inner race on the bearing
nearest the impeller and turned in the direction of
impeller rotation with drift pin and hammer until it locks.
Locking collars must be on the inboard (facing) sides of
the bearings. Secure the bearing to the shaft with torque
set screw. Lock and secure the other bearing to the shaft
in the same manner.

NOTE: If pillow block type bearings are used, slide
bearings onto shaft to desired location and bolt bearing
block securely to support base. Slide shaft back and
forth in secured bearing (do not drive with hammer) and
rotate to make certain it turns freely. Check correct
position of impeller with inlet orifice. Then secure
bearings to shaft by tightening set screws.

SET SCREW TIGHTENING SCHEDULE

1. Before initial operation of the fan, tighten set screws
according to the procedure outlined below.

2. After 500 operating hours or three months, whichever
comes first, tighten set screws to the full recommended
torque.

3. At least once a year, tighten set screws to the full
recommended torque.

PROCEDURE FOR TIGHTENING SET SCREWS IN

BEARINGS AND HUBS

One Set Screw Application

Using a torque wrench, tighten the set screw to the torque
recommended in Table 1.

Two Set Screw Application

1. Using a torque wrench, tighten one set screw to half of
the torque recommended in Table 1.

2. Tighten the second set screw to the full recommended
torque.

3. Tighten the first set screw to the full recommended
torque.

Table 1. Recommended Tightening Torque

for Set Screws

Set Screw Diameter Torque (in-lbs)

#10 35

1/4 80

5/16 126

3/8 240

7/16 384

1/2 744

9/16 1080

5/8 1500

3/4 2580

7/8 3600

1 5400

VARIABLE FREQUENCY

DRIVES AND MOTORS

There are occasions when a Variable Frequency Drive (VFD)
will cause poor motor performance and possible damage. To
avoid these problems, the Company recommends the
following:

1. Select compatible motor and VFD converter; if
possible, the motor and the converter should be from
the same manufacturer or at least the converter
selected should be recommended by the motor
manufacturer.

2. A motor shaft grounding system should be used to
prevent motor bearing damage from eddy currents.

NOTE: The Company will not honor motor warranty
claims if the customer fails to follow these
recommendations.

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