Trane RT-SVX19A-E4 Installation Operation & Maintenance page 16

Table 6b - Belt tensioning
Fan pulley
TK* / YK* /
Motor kW
WK*
diam. (mm)
125 1,5 BK90 / 222
155 1,5 BK85 / 210
175 3 BK130 / 324
200 3 BK160 / 400
250 4,6 BK190 / 476
125 3 BK130 / 324
155 3 BK140 / 349
175 4,6 BK140 / 349
200 4,6 BK190 / 476
250 4,6 BK190 / 476
16
Installation
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.
Fan pulley
Type / Type /
/ lengh (mm)
diam. (mm)
1VP44 / 105
1VP44 / 105
1VP44 / 105
1VL40 / 95
1VP50 / 121
1VP44 / 105
1VP44 / 105
1VP56 / 136
1VP56 / 136
1VP56 / 136
Belt
Belt type
deflexion
(mm)
BX68 / 1727 5,89
BX68 / 1727 6
BX75 / 1905 6,05
BX90 / 2286 6,96
BX96 / 2438 6,91
BX75 / 1905 5,85
BX77 / 1955 6,17
BX75 / 1905 5,45
BX96 / 2438 6,87
BX96 / 2438 6,32
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
Deflexion Deflexion Belt tension
effort effort
mini kg maxi kg
2,4 2,9
2,4 2,9
2,4 2,9
2,4 2,9
2,4 2,9
2,4 2,9
2,4 2,9
2,4 2,9
2,4 2,9
2,4 2,9
Belt tension
mini maxi
N N
400 500
400 500
400 500
400 500
400 500
400 500
400 500
400 500
400 500
400 500
RT-SVX19A-E4