Table 4-1. Command Shaft Rotation Specifications - Emerson Vilter VSS Installation, Operation & Maintenance Manual

Section 4 • Operation
Command Shaft Rotation
Capacity
Compressor
Model
INC
VSM 71
VSM 91
VSM 101
VSM 151
CW
VSM 181
VSM 201
VSM 301
VSM 361
VSM 401
VSM 501
VSM 601 CCW
VSM 701
VSS 451
CW
VSS 601
VSS 751
CCW
VSS 901
VSS 1051
VSS 1201 CCW
VSS 1301
VSSC 1501 CCW
VSS 1551 CCW
VSS 1801 CCW
VSS 1851
CCW
VSS 2101
VSS 2401
VSS 2601
CCW
VSS 2801
VSS 3001
*The large gear on the command shaft has 50 teeth. The teeth are counted when moving the command shaft from the
minimum stop position to the maximum stop position.
The manual operating shaft on the gear motor should be turned the opposite direction of the desired command shaft
rotation.
The capacity and volume control motors are equipped with a brake, if it is necessary to operate the control motors manu-
ally, the brake must be disengaged. The brake can be disengaged by pushing on the motor shaft on the cone end. The shaft
should be centered in its travel. Do not use excessive force manually operating the motor or damage may result.
4 – 8

Table 4-1. Command Shaft Rotation Specifications*

Volume
DEC INC DEC
CCW CW CCW
CW CCW CW
CCW CW CCW
CW CCW CW
CW CCW CW
CW CCW CW
CW CCW CW
CW CCW CW
CW CCW CW
CW CCW CW
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
No. of Turns/Rotation
Capacity
Turns Degrees Travel
0.80 288 3.141"
0.91 328 3.568"
0.91 328 3.568"
1.09 392 4.283"
1.22 439 4.777"
1.36 490 5.325"
1.48 533 5.823"
1.36 490 5.325"
1.48 533 5.823"
1.80 648 7.072"
Angle/Slide Travel
Volume
Turns Degrees Travel
0.45 162 1.767"
0.52 187 2.045"
0.52 187 2.045"
0.63 227 2.473"
0.74 266 2.889"
0.82 295 3.200"
0.87 313 3.433"
0.82 295 3.200"
0.87 313 3.433"
1.36 490 5.341"