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Basket Fan 130
8
Maintenance
DANGER
Switch off and completely isolate the fan from the electrical
supply before commencing maintenance.
WARNING
All moving parts must be at a complete standstill before com-
mencing maintenance.
8.1
Maintenance schedule
► Maintenance tasks – TO BE CARRIED OUT EVERY MONTH
1. Examine the fan housing for defects and remove any dirt that has accu-
mulated.
2. Examine the motor and remove any dirt that has accumulated on the
motor and between the motor cooling fins.
3. Examine the impeller for defects and remove any dirt that has accumu-
lated.
4. Examine the condition of the guards (if fitted) and remove any dirt that
has accumulated.
► Maintenance tasks – TO BE CARRIED OUT EVERY 3 MONTHS
1. Check the condition of the bearings.
2. Check the tension and condition of the v-belt.
3. Check the tightness of fasteners and fixings.
► Maintenance tasks – TO BE CARRIED OUT ANNUALLY
1. Only for 1~ fan motors: check the capacitor capacitance.
8.2
Maintenance subjects
Cleaning
In areas of application where high levels of contamination are present,
cleaning intervals should be adjusted accordingly.
Cleaning is preferably done using a soft brush. Do not use any aggressive
detergents, solvents or chemicals for cleaning.
Wet cleaning
Wet cleaning is allowed using low pressure clean water spray. Avoid directing
water jets at bearings and electrical connections as much as possible.
When wet cleaning is planned, close any open condensate drain holes before
commencing wet cleaning.
WARNING
Do not use a high pressure cleaner.
Water may penetrate electrical connections and bearings.
► After wet cleaning
1. Open the condensate drain hole at the lowest point of the fan motor.
2. Run the fan for 2 hours at full speed to remove any moisture that may
have entered the fan motor.
Bearings
The bearings used in the fan and/or fan motor are maintenance free and
greased for life. Average lifespan during normal operation is >30.000 hours.
INS00018-E
Original instructions
Defects in the bearings can usually be detected by listening. When the shaft /
impeller is rotated by hand, it should move freely with a smooth uniform
sound. Squeaking or grinding noises indicate the bearings may require
replacement.
Impeller
Cleaning the impeller is very important. A dirty impeller will suffer from
imbalance resulting in vibrations. A dirty impeller will also result in reduced fan
performance and reduced fan efficiency.
V-belt tension
For proper function of a V-belt, the V-belt requires correct tension. If the V-belt
tension is too low, the V-belt can slip causing premature wear of the V-belt. If
the V-belt tension is too high, the motor and impeller bearing life will be
considerably shorter.
Adjusting the V-belt tension
The V-belt tension in this product cannot be adjusted. This product is fitted
with a long-life pre-tensioned V-belt. If the V-belt no longer provides the
required tension, it must be replaced.
V-belt tension check
► Simple method to check proper V-belt tension
1. Measure span length A
2. Calculate deflection length C
ð C = 0.0156 x A (mm)
ð Pushing with deflection force B, deflection should be C
Deflection force B:
V-belt profile: A
Small pulley Ø (mm)
75 to 90
90 to 118
118 to 180
Illustration 6: V-belt tension check
Capacitor (1~ fan motor)
Capacitor capacitance decreases slowly over time. Average lifespan is ±
30.000 hours. Replace the capacitor when the capacitance has dropped
below the value as listed on the capacitor.
Deflection force B (kg)
Min
Max
1.6
2.4
2.0
2.8
2.3
3.3
ENGLISH | 9
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