Frick TDSL 193L User Manual

070.250-IOM1 (NOV 2013)
Page 17
TDS_ Rotary Screw Compressor
Installation
Volumizer volume ratio control
Vi increase
The volume ratio Vi is increased when MSS solenoid YY3 is
energizedandoilowsfromtheoilmanifoldthroughvalve
ports P and A to cylinder port SC-3 and enters the increase
side of the cylinder. Simul taneous ly, oil contained in the
decreasesideofthecylinderowsoutcylinderportSC-4
through valve ports B and T to compressor closed thread
port.
Vi decrease
The volume ratio Vi is decreased when MSS solenoid YY4
isenergizedandoilowsfromtheoilmanifoldthrough
valve ports P and B to cylinder port SC-4 and enters the
decrease side of the cylinder. Simul taneous ly, oil contained
intheincreasesideofthecylinderowsoutcylinderport
SC-3 through valve ports A and T to compressor closed
thread port.
Low ambient operation
It is recommended that package oil separators be insu-
lated as a minimum requirement to preserve the heat
generated by the oil heaters, to prevent condensation and
secure lubrication at start-up.
Balance piston pressure regulator
for TDSH 355 compressors
A Balance Piston Pressure Regulator is required to reduce
the extended overbalance from the thrust balance piston
at part load.
Figure 13: Pressure regulating valve
534B 0325H 01 1/8" RESTRICTION ORIFICE
951A 0007H 01 (OR H 03)
SO LE NOIDVALVE
TO SB-2
COMPRESSO R
PORT
954A 0014H 01 PRESSURE-REGULATING VALVE (A4ALE)
FROM
COMPRESSO R
DISCHARGE OR
OIL MANIFO LD
BLPSPREG
FROM OIL
MANIFO LD
High-stage SB-2 oil supply line diagram: Shows the three
additions described below arranged in parallel.
Pressure-regulating valve: Discharge pressure determines
compressor thrust balance. The proper setting for the
pressure-regulating valve is 50 psi below DISCHARGE pres-
sure. This pressure may vary based on operating conditions.
Solenoid valve: Energizing, or opening, the solenoid valve
pressurizes the balance piston with full oil pressure from the
oil manifold, bypassing the A4ALE Pressure Regulating Valve.
De-energizing, or closing, the solenoid valve pressurizes
the balance piston with oil pressure regulated by the A4ALE
Pressure Regulating Valve.
Signals from the control panel operate the solenoid valve
(output module 12 on Frick micro panel). The solenoid valve
should open when the slide valve position is 70% or greater,
and close when the slide valve position is 65% or less. These
may vary based on operating conditions.
Orice: The oriceensuresoilsupplytotheinletendbear-
ings during upset conditions such as start-up.
Figure 12: MSV and MSS hydraulic cylinder and solenoid valves

Frick TDSL 193L Specifications

General

Brand	Frick
Model	TDSL 193L
Category	Air Compressor
Language	English