General maintenance, Belt driven direct drive – Aerovent IM-165 User Manual
Page 2
General Maintenance
A regular fan maintenance schedule should be established to
include the following:
1.
Fan Wheel: The fan wheel in a centaxial fan must be kept
reasonably clean if it is to perform properly. Where dirt
build-up is slight, very little unbalance can result. Air heav-
ily laden with grease and dirt will deposit a great deal on
impeller blades. Conditions should be observed and clean-
ing performed as required for smooth fan operation and,
in the case of grease, removal of this type of fire hazard.
One problem that often develops is the unbalance
which occurs when particles of dirt and grease are thrown
from the blades. This unbalance condition will naturally
cause excessive wear and noise. If the wheel shows exces-
sive wear, it should be replaced.
Cleaning of the wheel should be accomplished, if pos-
sible, without removing it from the shaft. If the fan is
furnished with an access door, the wheel can be cleaned
through this opening. If no door is supplied, then the inlet
cone must be removed to expose the wheel. If for some
reason the wheel is removed from the shaft, take note
of the “A” dimension called out in the chart above. This
dimension must be held if proper performance is to be
maintained.
2.
V-Belt Drive: Check V-belt drive for proper alignment
and tension. (See General Installation and Maintenance
Manual IM-100.)
3.
Fan Bearings: Lubricate the bearings as detailed in
the ball bearing lubrication instructions in the General
Installation and Maintenance Manual (IM-100).
4.
Screws and Bolts: Check tightness of all screws and
bolts throughout the assembly.
Guide Vanes
Wheel
Back Plate
Bar Ring
Inlet Cone
Airflow
Taper Lock
Bushing
A
W
Wheel
W
Inlet Cone
Airflow
Taper Lock
Bushing
A
Wheel
Back Plate
Guide
Vanes
Bar Ring
Belt Driven
Direct Drive
SIZE
A
W*
12
4
5
⁄
8
5
7
⁄
16
14
5
7
⁄
32
5
1
⁄
32
16
5
27
⁄
32
5
21
⁄
32
18
6
21
⁄
32
6
3
/
8
20
7
3
/
8
7
1
⁄
16
22
81⁄
4
7
15
⁄
16
25
9
5
⁄
16
8
15
⁄
16
28
10
17
⁄
32
10
1
⁄
16
SIZE
A
W*
32
11
27
⁄
32
11
11
⁄
32
35
13
5
⁄
16
12
3
/
4
39
14
27
⁄
32
14
3
/
16
44
16
9
⁄
16
15
7
/
8
49
18
9
⁄
16
17
23
⁄
32
55
20
7
/
8
19
27
⁄
32
63
24
3
/
4
22
11
⁄
16
71
26
15
⁄
32
25
1
⁄
2
*100% wheel width
“A” dimension (inlet cone to wheel back plate) must be held. This dimension is
critical to fan performance. “A” dimension shown is based on 100% wheel width
and must be adjusted if wheel furnished is other than 100% full width.
All dimensions in inches.
1.5MSS05/10
Aerovent | www.Aerovent.com
5959 trenton Lane n | minneapolis, mn 55442 | Phone: 763-551-7500 | Fax: 763-551-7501
®