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The Motor Amps Load Limit protects the com-
pressor from overloading by decreasing the
compressor capacity if the motor amperage is
at the Maximum Amps setpoint, or preventing
an increase in capacity if the motor amperage is
above the Full Load Amps setpoint. ( See manual
for the appropriate microprocessor.)
3. Oil Separator Heater
The oil separator heater keeps the oil in the
separator from becoming too viscous and helps
keep gas from condensing in the receiver section
of the separator.
The heater is turned on only when the compres-
sor is off. The separator heater is supplied with
an integral temperature control.
Operation
B. Safety Setpoints
A detailed explanation of all safety setpoints can be
found in the Compact Logix PLC manual, p/n 35391CL.
1. Oil Pressure
Low oil pressure differential stops the compressor
unit when there is an insufficient difference in pres-
sure between the oil manifold and suction.
2. Discharge Pressure
High discharge pressure cutout stops the compres-
sor unit, when the discharge pressure in the oil
separator exceeds the setpoint.
COMMAND SHAFT ROTATION NO. OF TURNS / ROTATION ANGLE / SLIDE TRAVEL
COMP. CAPACITY VOLUME CAPACITY VOLUME
MODEL INC DEC INC DEC TURNS/ANGLE/TRAVEL TURNS/ANGLE/TRAVEL
VSR 111 CCW CW CCW CW 0.91 / 328 / 3.568” 0.52 / 187 / 2.045”
VSR 151 CCW CW CCW CW 0.91 / 328 / 3.568” 0.52 / 187 / 2.045”
VSR 221 CCW CW CCW CW 0.91 / 328 / 3.568” 0.52 / 187 / 2.045”
VSR 301 CCW CW CCW CW 0.91 / 328 / 3.568” 0.52 / 187 / 2.045”
VSS 451 CCW CW CCW CW 0.91 / 328 / 3.568” 0.52 / 187 / 2.045”
VSS 601 CCW CW CCW CW 0.91 / 328 / 3.568” 0.52 / 187 / 2.045”
VSS 751 CW CCW CW CCW 1.09 / 392 / 4.283” 0.63 / 227 / 2.473”
VSS 901 CW CCW CW CCW 1.09 / 392 / 4.283” 0.63 / 227 / 2.473”
VSS 1051 CW CCW CW CCW 1.22 / 439 / 4.777” 0.74 / 266 / 2.889”
VSS 1201 CW CCW CW CCW 1.22 / 439 / 4.777” 0.74 / 266 / 2.889”
VSS 1501 CW CCW CC CCW 1.36 / 490 / 5.325” 0.82 / 295 / 3.200”
VSS 1801 CW CCW CW CCW 1.36 / 490 / 5.325” 0.82 / 295 / 3.200”
VSM 71 CCW CW CCW CW 0.80 / 288 / 3.141” 0.45 / 162 / 1.767”
VSM 91 CCW CW CCW CW 0.80 / 288 / 3.141” 0.45 / 162 / 1.767”
VSM 101 CCW CW CCW CW 0.80 / 288 / 3.141” 0.45 / 162 / 1.767”
VSM 151 CCW CW CCW CW 0.80 / 288 / 3.141” 0.45 / 162 / 1.767”
VSM 181 CCW CW CCW CW 0.80 / 288 / 3.141” 0.45 / 162 / 1.767”
VSM 201 CCW CW CCW CW 0.80 / 288 / 3.141” 0.45 / 162 / 1.767”
VSM 301 CCW CW CCW CW 0.80 / 288 / 3.141” 0.45 / 162 / 1.767”
VSM 361 CCW CW CCW CW 0.80 / 288 / 3.141” 0.45 / 162 / 1.767”
VSM 401 CCW CW CCW CW 0.80 / 288 / 3.141” 0.45 / 162 / 1.767”
VSM 501 CW CCW CW CCW 0.91 / 328 / 3.568” 0.52 / 187 / 2.045”
VSM 601 CW CCW CW CCW 0.91 / 328 / 3.568” 0.52 / 187 / 2.045”
VSM 701 CW CCW CW CCW 0.91 / 328 / 3.568” 0.52 / 187 / 2.045”
TABLE 1. VSS / VSR / VSM COMMAND SHAFT ROTATION AND TRAVEL