Installation
RT-SVX19A-E4
16
To increase airflow
Loosen variable sheave set screw
and turn sheave clockwise.
To decrease airflow
Loosen variable sheave set screw
and turn sheave counter-clockwise.
To increase belt tension
Loosen the nut (next to the idler
sheave) that secures the sheave in
place. With a wrench, apply
pressure clockwise on the outside
nut (round headed one), until
tension desired is reached. While
holding pressure with the tension
nut, retighten the nut next to the
idler sheave.
Figure 9 - Typical fan, motor, and sheave
assembly
A = Fan Housing
B = Terminal Block
C = Fan Sheave
D = Plastic Bushing
E = Belt Tension Adjustment Bolt
F = Idler Pulley
Table 6b - Belt tensioning
TK* / YK* /
WK*
Motor kW
Fan pulley
Type /
diam. (mm)
Fan pulley
Type /
diam. (mm)
Belt type
/ lengh (mm)
Belt
deflexion
(mm)
Deflexion
effort
mini kg
Deflexion
effort
maxi kg
Belt tension
mini
N
Belt tension
maxi
N
125
1,5
BK90 / 222
1VP44 / 105
BX68 / 1727
5,89
2,4
2,9
400
500
155
1,5
BK85 / 210
1VP44 / 105
BX68 / 1727
6
2,4
2,9
400
500
175
3
BK130 / 324
1VP44 / 105
BX75 / 1905
6,05
2,4
2,9
400
500
200
3
BK160 / 400
1VL40 / 95
BX90 / 2286
6,96
2,4
2,9
400
500
250
4,6
BK190 / 476
1VP50 / 121
BX96 / 2438
6,91
2,4
2,9
400
500
125
3
BK130 / 324
1VP44 / 105
BX75 / 1905
5,85
2,4
2,9
400
500
155
3
BK140 / 349
1VP44 / 105
BX77 / 1955
6,17
2,4
2,9
400
500
175
4,6
BK140 / 349
1VP56 / 136
BX75 / 1905
5,45
2,4
2,9
400
500
200
4,6
BK190 / 476
1VP56 / 136
BX96 / 2438
6,87
2,4
2,9
400
500
250
4,6
BK190 / 476
1VP56 / 136
BX96 / 2438
6,32
2,4
2,9
400
500