Emerson Vilter VSS User Manual

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VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Section 2 • Theory of Operation
Control System
The compressor unit is controlled by the micro-proces-
sor, i.e. microVission 20/20 panel or PLC panel. This pan-
el’s main function is to control the refrigeration system
from the data that it receives from the sensors around
the unit. For additional information, re fer to micro-pro-
cessor manual (35391SC for Vission 20/20 Operating
Manual or 35391CM for Compact Logix PLC Software
Manual).
WARNING
Software programming credentials shall only be
made available by the supplier. The user will only
have access to operational features established by the
supplier. Failure to comply may result in serious injury
or death.
Temperature Elements, Pressure
Transmitters and Indicators
Temperature elements (TE), pressure transmitters (PT)
and pressure indicators (PI) are instruments used to
measure temperatures and pressures at specic loca-
tions on the compressor unit. Temperature elements are
typically mounted on the compressor, suction pipe, dis-
charge pipe, oil separator, oil lter inlet and outlet pipe.
Pressure transmitters are typically mounted on the block
and bleed assembly. The pressure transmitters measure
suction pressure, inlet and outlet oil pressure, and dis-
charge pressure in the oil separator. Typically, pressure
indicators are not mounted from the factory, except for
a pressure indicator to show the nitrogen holding charge
for shipping and storage purposes. If required, end us-
ers have the ability to mount pressure indicators at the
block and bleed assembly.

Emerson Vilter VSS Specifications

General

Brand	Emerson
Model	Vilter VSS
Category	Air Compressor
Language	English