Frick SGC 2824 User Manual

070.650-IOM (AUG 2015)
Page 5
SGC ROTARY SCREW COMPRESSOR
INSTALLATION - OPERATION - MAINTENANCE
• Compressor must be stored inside a dry building
environment.
• Grease the male rotor shaft to prevent rust.
• Record all information in a “Compressor Long Term
Storage Log.”
Contact Johnson Controls-Frick Service with any
questions regarding long term storage.
DESCRIPTION
SGC/SGX COMPRESSORS
Frick SGC/SGX rotary screw compressors utilize mating
asymmetricalprolehelicalrotorstoprovideacontinuous
owofvaporandtheyaredesignedforbothhigh-pressure
and low-pressure applications. The compressors
incorporate the following features:
1. High-capacity roller bearings to carry radial loads at both
the inlet and outlet ends of the compressor.
2. Heavy-duty, four-point contact ball or angular-contact
bearings are mounted at the discharge end of the
compressor to carry axial loads.
3. Balance pistons, located in the inlet end of the compressor,
reduce axial loads on the male axial bearings to increase
bearing life.
4. Moveable slide valve to provide fully modulating capacity
control from 100% to approximately 10% (2824, 3519, and
4021 - to 15%; 3524 - to 20%) of full load capacity.
5. VOLUMIZER volume ratio control to allow innitely
variable volume ratio from 2.2 to 5.0 for most SGC models
(2824 Vi = 2.0 - 4.1; 3524 Vi = 2.4 – 4.5; 4021 Vi = 2.2 - 4.3)
during compressor operation.
6. A hydraulic cylinder to operate the slide stop and slide
valve.
7. Housings are designed for 400 psig pressure in SGC/SGX
models through 355. Model SGXH 4013 has 700 psig max.
allowable pressure, while the SGXH 4018 and 4021 models
allow 600 psig.
8. Bearing and control oil vented to closed thread in the
compressor instead of suction pressure to avoid
performance penalties from superheating and displacing
suction gas.
9. Shaft seal housing is designed to maintain operating
pressure on seal well below discharge pressure for increased
seal life.
10. Oil injected into the rotors to maintain good volumetric
and adiabatic efciency even at very high compression
ratios.
11. Shaft rotation clockwise facing compressor, suitable for
all types of drives. SEE FOLLOWING WARNING.
WARNING
Compressor rotation is clockwise when facing the
compressor drive shaft. The compressor should never
be operated in reverse rotation, as bearing damage
will result.
12.SuctionanddischargeangesareANSIB16.1Class300
for all but the SGX 4013 model. SGX 4013 has Class 400
suctionanddischargeanges.
13. Integral suction strainers are provided for all models
except the SGX 35XX and 408 series. These models must
be tted with a suitable strainer, #60 mesh X .0065”
diameter stainless steel wire or better, to prevent damage
to the compressor from particles entering the suction area.
COMPRESSOR LUBRICATION SYSTEM
The lubrication system on SGC/SGX screw compressor units
performs several functions:
1. Provides lubrication to bearings and seal.
2. Provides a cushion between the rotors to minimize noise
and vibrations.
3. Helps keep the compressor cool and prevents overheating.
4. Provides an oil supply to hydraulically actuate the slide
valve and slide stop.
5. Provides oil pressure to the balance piston to help increase
bearing life. NOTE: Some applications/operating conditions
require a regulated pressure to the balance piston.
6. Provides an oil seal between the rotors to prevent rotor
contact or gas bypassing.
7.OnSGXmodels,providesoilsupplytothesqueezelm
dampers.
COMPRESSOR AND PACKAGED EQUIPMENT STORAGE LOG
COMPRESSOR* ROTOR VISUAL
SHAFT ROTATION HOUSING CHARGE INSPECTION
MODEL SERIAL NO. 1½ TURN CHARGE ADDED PER QAI-3 CHARGE CHECKED BY DATE
*Compressor, Motor, Oil Pump and Refrigerant Pump

Frick SGC 2824 Specifications

General

Brand	Frick
Model	SGC 2824
Category	Air Compressor
Language	English