MK Plastics KVC IO&M User Manual

1

Axijet-V

® &

KVC®

High Plume Exhaust

Bulletin 73-03-February 2014

Lifting With Lifting Lugs

Figure-1

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Introduction

This bulletin has been prepared to guide the users of Axijet-V In-line Mixed Flow & Centrifugal Fans and
KVC In-line Centrifugal Fans in the proper installation, operation and maintenance procedures to insure
maximum equipment life with trouble-free operation.

Shipping and Receiving

All M.K. Plastics products are carefully constructed and inspected before shipment to insure the highest
standards of quality and performance. Compar e al l components with the bill of lading or packing list to
verify that the proper unit was received. Check each unit for any damage that m ay have occurred in
transit. Any damage should be reported immediately to the carrier and the necessary damage report filed.

Handling

Handling of all air moving equipment should be conducted by trained personnel and be consistent with
safe handling practices. Verify the lif t capacity and operating condition of handling equipment. Maintain
handling equipment to avoid serious personal injury. Units ship ped completely assembled may be lifted
with slings and spreader bars. Use well-padded chain s, cables or nylon straps. On most units, lif ting lugs
are fashioned to protect the fan and fan housi ng from damage (see Figure 1). Never lift a fan by the inlet
or discharge flange, shafting or drives, wheel, motor or motor base, or in any other manner that may bend
or distort parts. If installation is to be delayed, store the unit in a protected area. Prot ect the fan and motor
bearings from moisture and vibration (or shock loading). For extended storage, wrap entire unit in pl ast ic.
Wrap loosely so air may circulate around the fan and m oi st ure does not collect, or use a desiccant.
Extended storage requires monthly inspection s. Check for corrosion or damage to the unit and for debris
within the fan. Rotate the fan wheel a few revolutions. Stop the wheel in a position other than the i nitial
position. Grease the bearings every month wit h a grease compatible with the grease supplied with t he
bearings.

M.K.Plastics Corp. Montréal, Québec www.mkplastics.com

(Standard)

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Fan Installation, Factory Assembled Units

Follow proper handling instructions as given earlier.

1. Move the fan to the final mounting position.

2. Remove skid, crates and packing materials carefully.

3. Attach vibration isolators (if used) to app ropriate mounting clips on fan. Locate fan in position
using lifting instructions above.

4. Carefully level unit using shims (on rigid mounted f ans) at mounting hole locations. Fans mounted
with vibration isolators may be leveled by adjust ing the hardware.

5. Continue with Operations Checklist.

Motor Maintenance

The three basic rules of motor maintenance are:

1. Keep the motor clean.

2. Keep the motor dry.

3. Keep the motor properly lubricated.

Blow dust off periodically (with low pressure air) to prevent motor from overheating. Some smaller m otors
are lubricated for life. Lubrication requirem ents are normally attached to the motor. Use the motor
manufacturer’s recommendations for relubrication. If this information is not available, the following
schedule maybe used. Motors less than 10 HP runni ng about eight hours a day in a clean environment
should be lubricated once every five years; mot ors 15 to 40 HP, every three years. For motors in dusty or
dirty environments or running 24 hours a day: div i de the service interval by 4. Do not over lubricate.

Drive Maintenance and Installation

V-belt drives need periodic inspection, retensioni ng, and occasional belt replacement. When i nspecting
drives, look for dirt buildup, burrs or obstruction s that can cause pr emature belt or drive replacement. If
burrs are found, use fine emery cloth or a stone to remove them. Be careful that dust does not enter t he
bearings.

Check sheaves for wear. Excessive slippage of belts on sheaves can cause wear and vibration. Repl ace
worn sheaves with new ones. Carefully align sheaves to avoid premature sheave failure.

Inspect the belts for wear. If fraying or ot her wear is observed to be mostly on one side of the belts, the
drives may be misaligned. Reinstall the drives ac cording to the following instructions:

1. Slip (do not pound) proper sheave onto corresponding shaft. CAUTION: Placing fan sheave on
motor can over-speed wheel and cause structural failure.

2. Align sheaves with straight edge extended alon g sheaves, just making contact in two places on
outside perimeters of both sheaves.

3. Tighten sheave bolts (or setscrews if appropriate). Table1 can be used to determine the amount
of torque required.

4. Install a matched set of belts. Adjust the motor position to obtain slack, install, and tighten belts.
Using a pry bar will damage belts.

5. Tighten belts to proper belt tension. Ideal tension is just enough so that the belts do not slip under
peak load. When using drive tensioning data supplied by V-belt drive manufacturers, new be l ts
can be tensioned to a value 50% greater than for normal operation. This will reduce retensioning
requirements after break-in. Recheck sheave alignment after tensioning.

6. After initial installation of belts, recheck bel t tension again after a few days. (New belts requi re a
break-in period of operation.)

7. When replacing belts, replace the entire set. After initial replacement and tensioning, recheck belt
tension after a few days. (New belts require a break-in period of operation.) Never use belt
dressing on any belts.

8. Fans that have motors and drives mounted at the factory are trim balanced prior to shipment.
This is not possible on units that are shipped without motors and drives. The addition of drive
components in the field can create unbalance forces. MK Plastics recommends final balancing of
the unit after the drive components are installe d. Failure to do so may void the warranty.

M.K.Plastics Corp. Montréal, Québec www.mkplastics.com

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FASTENER

QD

IN IRON IN ALUM. HUB FOR DRIVE

#10 - - - - - 5

0.250-20 5.5 8 12 7.9 7.5 9

0.312-18 11 7 25 16 13 15

0.375-16 22 30 45 29 24 30

0.437-14 30 50 70 - - -

0.500-13 55 75 110 70 - 60

0.562-12 - - - - - 75

0.625-11 100 150 220 - - 135

0.750-10 170 270 380 - - -

0.875-9 165 430 600 - - ­1-8 250 645 900 - - -

1.25-7 500 1120 1500 - - -

Tolerance: +5%
For wheel setscrews use Grade 2 values.
The above torque values are for no lubricated fasteners.

BROWNING SPLIT

TAPER BUSHINGS

SIZE

GRADE 2

GRADE 5

GRADE 8

Table-1. Tightening Torque (Ft.-Lbs)

Motor Support Adjustment

Two different types of motor mounts, post and saddle, are used on Axijet-V & KVC fans. Which mount to
use depends on the size of the fan and motor.

On the post type motor mount, the motor plate is supported on four threaded rods. Belt tension is
adjusted by loosening the four nuts on top of the m otor plate and raising the motor plate by adjusting the
four nuts underneath it. The top nuts should then be tightened to hold the motor plate in place.

On the saddle type motor mount, the motor pivots on one side and adjustment of belt tension is achieved
by loosening the nuts on top of the motor plate on the other side, then raising the motor plate by adjusting
the nuts underneath the motor plate. The nuts on top of the motor plate should again be tightened to hold
the motor plate in place. Several holes are provi ded on the pivot side, and the pivot point can be raised
for gross belt adjustment. If this adjustment is made, however, the motor plate should be as parallel as
possible to the fan center plane. Care should be taken to maintain drive alignment and proper bel t
tension.

Bearing Maintenance

Proper lubrication of the fan drive bearings helps assure maximum bearing life. All fans are eq uipped with
decals indicating relubrication intervals f or normal operating conditions. See Table 2A, 2B and 2C for
typical lubrication data. However, every installation is different and the frequency of relubrication sho ul d
be adjusted accordingly.

Observation of the conditions of the grease expelled from the bearings at the time of relubricat i on i s the
best guide as to whether regreasing intervals and amount of grease added should be altered.

Greases are made with different bases. Ther e are synthetic base greases, lithium base, sodium base,
etc. Avoid mixing greases with different bases. They could be i ncompatible and result in rapid
deterioration or breakdown of the grease. The lubrication sticker identifies a list of acceptabl e lubricants.
All bearings are filled with a lithium-based grease before leaving the factory. When the fans are started,
the bearings may discharge excess grease through t he seals for a short period of time. Do not replace
the initial discharge because leakage will cea se when the excess grease has worked out. Sometimes the
bearings have a tendency to run hotter during t hi s period. There is no reason for alarm unless it lasts ov er
48 hours or gets very hot (over 200°F). When relubricating, use a sufficient amount of grease to purge the
seals. Rotate bearings by hand during relubrication.

M.K.Plastics Corp. Montréal, Québec www.mkplastics.com

4

500 1000 1500 2000 2500 3000 3500 4000 4500

1500 1.187 Ball 12 12 10 6 6 4 4 4 2
1825 1.437 Ball 12 12 10 6 6 4 4 4 2
2225 1.437 Ball 12 12 10 6 6 4 4 4 2
2450 1.687 Ball 12 12 10 6 6 4 4 4 2
2700 1.687 Roller 8 4 3 2 1 1 1 1 1
3000 1.937 Roller 8 4 3 2 1 1 1 1 1
3300 2.187 Roller 8 4 3 2 1 1 1 1 1
3650 2.187 Roller 8 4 3 2 1 1 1 1 1
4025 2.187 Roller 8 4 3 2 1 1 1 1 1
4450 2.437 Roller 6 3 2 1 1 0.5 0.5 0 0
4900 2.437 Roller 6 3 2 1 1 0.5 0.5 0 0
5425 2.687 Roller 6 3 2 1 1 0.5 0.5 0 0

Speed [RPM]

Type

Fan Si z e

Shaft Dia .

Relubricat i on Schedule (W eeks) *

Axi j et - VM ( Cl ass 2)

500 1000 1500 2000 2500 3000 3500 4000 4500

1225 1.000 Ball 12 12 10 6 6 4 4 4 2
1500 1.187 Ball 12 12 10 6 6 4 4 4 2
1825 1.437 Ball 12 12 10 6 6 4 4 4 2
2225 1.437 Roller 12 8 8 4 2 2 2 2 1
2450 1.937 Roller 8 4 3 2 1 1 1 1 1
2700 1.937 Roller 8 4 3 2 1 1 1 1 1
3000 2.187 Roller 8 4 3 2 1 1 1 1 1
3300 2.187 Roller 8 4 3 2 1 1 1 1 1
3650 2.187 Roller 8 4 3 2 1 1 1 1 1
4025 2.437 Roller 6 3 2 1 1 0.5 0.5 0 0
4450 2.687 Roller 6 3 2 1 1 0.5 0.5 0 0
4900 2.937 Roller 6 3 2 1 1 0.5 0.5 0 0
5425 3.437 Roller 6 3 2 1 1 0.5 0.5 0 0

Fan Si z e

Shaft Dia .

Type

Speed [RPM]

Relubricat i on Schedule (W eeks) *

Axi j et - VC & KVC (Class 2)

Table-2A. Relubricating Schedule (Weeks) – Axijet-VM (Class 2)

Table-2B. Relubricating Schedule (Weeks) – Axijet-VC & KVC (Class 2)

M.K.Plastics Corp. Montréal, Québec www.mkplastics.com