Aerovent IM-180 - Manual (Page 2)

A spare parts list is not supplied with the fan. There are very few parts which would ever require replacing. For
ordering these, mention part by name such as wheel, bearing or shaft and refer to model number and serial number
on label. If possible, advise order number and date of original purchase.
TEMP.
FACTOR
°F
70 1.00
100 1.00
150 0.85
200 0.55
Max. Safe Speeds For
Wheels At 70°F Temp
Correction Factors
For Max. Speed
at Various Temps
SIZE CL I CL II CL III
12 3080 4005 5082
16 2425 3153 4002
20 1941 2523 3046
25 1540 2002 2372
32 1213 1576 1837
39 970 1261 1455
Maintenance
Spare Parts
6. Do not exceed maximum operating speed as shown in the
table below.
Couplings
Direct-coupled fans should be checked for correct coupling
alignment before putting the unit in operation. Also, check
lubricant following manufacturer’s recommendations for type
and amount of lubricant used. For field installation, the cou-
pling should be mounted as follows:
1. Remove dirt or rust from fan and motor shafts and coat with
grease or oil for easy mounting of coupling.
2. Mount the coupling halves on the shafts with the fans sepa-
rated by the coupling manufacturer’s specified gap.
3. The coupling should be checked for parallel and angular
alignment with a straightedge and feeler gauge. Exact toler-
ances are specified by the coupling manufacturer.
4. Once a proper alignment is assured, complete the assembly
and lubricate the coupling before putting the unit into opera-
tion. After a short period of operation, recheck alignment.
Regular and systematic inspection of all fan parts is the key to
good fan maintenance. Frequency of inspection is determined
by the severity of the application and local conditions. Once a
maintenance schedule is established, it should be strictly adhered
to. Regular fan maintenance should include the following:
1. Check after one day operation.
2. Check after one week operation.
3. Check periodically once a month until experience indicates
that a longer period is satisfactory.
Fan Wheel
The fan wheel must be kept reasonably clean if it is to perform
properly. Dirt or chemical deposits will usually build up on the
wheel evenly and they present no problem to performance or
operation until they become thick enough to break away in
crust-like pieces. When this happens, the wheel may be thrown
out of balance and the resulting vibration could be serious.
When removing this crustaceous accumulation, care should be
taken not to clean the fan wheel with sharp objects which might
damage the laminated surface and reduce corrosion resistance.
Should the wheel show excessive wear, it should be replaced.
V-Belts
On belt-driven units, check V-belt drive for proper alignment
and tension (see IM-101). If belts show wear, they should be
replaced with a matched set of belts. If unit is direct coupled,
check coupling alignment.
Fan Bearings
Check fan bearings for adequate lubrication, wear, tightness
and overheating. (See bearing section of IM-100 for lubrication
specifications.)
Fasteners
Check tightness of all nuts and bolts taking care not to over-
tighten nuts on encapsulated housing bolts.
Condensate Drain
If fan is equipped with a condensate drain in the housing, check
to be sure it is not clogged.
Straightedge
Coupling
Shaft
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5959 trenton Lane n | minneapolis, mn 55442 | Phone: 763-551-7500 | Fax: 763-551-7501
®