Maintenance
CAIR
fricostar
®
64
FläktGroup DC-2009-0019-GB 2018-01/R9 • Specifications are subject to alteration without notice
Re-tensioning or replacing V-belt
Initial check:
Perform the initial check following 50 hours of operation
Regular checks:
Subsequent checks depend on the operating load and experience.
– Check every three months, if the unit operates on a regular daily basis (approx.
8 hrs a day).
– With higher operating hours increase the frequency of inspections; e.g. if the unit't
supply fan is continuously operating in the dehumidification mode up to 24 hours,
monthly checks are required.
•
Inspect the belt for tension and wear, re-tension or replace if required.
To re-tension the belt using the motor mounting plate or replace:
•
Slacken the counter nuts of the set bolts.
•
Replace the belt , if required.
•
Check the pulley alignment and adjust, if required (refer to Fig. 9-1).
•
Tension the fan belt (measure using a belt tensiometer, refer to Fig. 9-1).
•
Tighten counter nuts.
An acceptable belt deflection at a load of P = 20-30 N ranges from 5 to 20 mm, depend-
ing on the axis distance (see refer to Fig. 9-1).
Belt
profiles
Smallest pulley
diameter (mm)
F force
(N/belt)
SPZ
70 – 85
13 – 19
86 – 155
15 – 23
116 – 150
19 – 27
151 – 200
25 – 24
201 – 250
29 – 38
SPA
112 – 150
25 – 34
151 – 200
29 – 38
201 – 250
35 – 44
251 – 300
40 – 50
SPB
180 – 224
40 – 52
225 – 300
46 – 60
301 – 400
55 – 76
401 – 500
67 – 90
Tab. 9-3 High-performance narrow V-belt as per DIN 7753
0
10
20
30
40
50
0
500
1000
1500
2000
2500
3000
Deflection x [mm]
Distance between axes [mm]
EQUIPMENT DAMAGE AND NOTICE
Always reduce the distance between the axes to the point where the V-belt can be
placed in grooves without applying force. It is not allowed to use crow bars, screw-
drivers or similar tools for belt mounting.
If the V-belt pulleys are fitted with several grooves, replace all V-belts. Do not use
a belt set consisting of belts from different manufacturers.
Belts do not require any special maintenance. Avoid using belt wax and belt spray.
