Fan blade removal and installation, Fan operation – Grain Systems PNEG-010 User Manual
Page 20
6. Fan Operation
20
PNEG-010 Vane Axial Fan
Approximate Hours of Fan Time to Change Bin Temperature
1. Bushels are rounded and approximate.
2. The hours required are based on clean grain. High moisture grain and grain containing fines or foreign material will
require more time to complete the air change.
3. Not Recommended: Bins in the NR range, may require fan(s) of a different size to get the cool time into the
accepted range.
4. Bins requiring more than 100 hours of aeration to totally change the temperature may require continuous aeration at
about 1/10
th
CFM per bushel or some other acceptable method.
Fan Blade Removal and Installation
The fan blade is secured to the motor shaft by the use of a taper-lock bushing, motor shaft key and
cap screws. The size, quantity and torque of cap screws required will depend on the model of the fan.
Fan Size
HP
Bin Diameter Approximate 22' to Eave-Approximate Hours
of Fan Time Required
Approximate 32' to Eave
18
21
24
27
30
33
36
42
48
36
42
48
1
73
79
90
NR
NR
NR
NR
NR
NR
NR
NR
NR
1.5
56
61
65
66
76
82
92
NR
NR
NR
NR
NR
3
44
51
52
57
63
69
78
93
NR
NR
NR
NR
7
38
42
44
47
52
56
61
71
81
79
93
NR
10
35
37
41
42
45
49
53
62
71
72
82
92
15
30
32
35
39
40
42
45
54
63
62
70
80
Approximate BU
4500
6500
8500
11000
13500
16500
19500
27000
35500
28000
38500
50500
DANGER
Always disconnect and lock out power before working on or around fan.
CAUTION
Although the taper-lock method of retaining the blade onto the motor shaft is
very simple and obvious, it is essential that the following points be read
carefully and fully understood, as improper installation can result in serious or
fatal injury caused by a loose, fast flying blade.
THREADED BUSHING HOLES: The threaded holes within the bushing are
provided for disassembly purposes only. Do not attempt to use these holes for
re-assembly, as they will not allow the parts to become locked onto the shaft,
thereby causing an extremely hazardous operating condition.
CLEARANCE HOLES: When reassembling parts, the cap screws must be
installed through the UNTAPPED.
NR