Frick SGC/SGX Rotary Screw Compressor Installation Operation and Maintenance Guide

This manual contains installation, operation, and maintenance instructions. Read

thoroughly before beginning installation. Failure to follow these instructions may

result in personal injury or death, damage to the unit, or incorrect operation.

SGC/SGX Rotary Screw Compressor IOM

(MK2)

Models: SGC 1913-2824, SGCB/H 3511-3519, Original SGXB

3519-3524, SGXH 3519, and 4013-4021

Form: 070.650-IOM (JUL 2019)

Installation - Operation - Maintenance

File: Service Manual - Section 070

Replaces: 070.650-IOM (AUG 2015)

Dist: 3, 3a, 3b, 3c

Revised: February 21st, 2022

Check www.FrickCold.com for the latest version of this publication.

2 SGC/SGX Rotary Screw Compressor IOM (MK2)

Contents

ContentsSafety precaution definitions..........................................................................................................................5

General Information........................................................................................................................................ 6

Preface.................................................................................................................................................... 6

Design Limitations.................................................................................................................................6

Job Inspection.........................................................................................................................................7

Standard Bare Compressor.................................................................................................................. 7

Transit Damage Claims......................................................................................................................... 7

Compressor Identification....................................................................................................................7

Long-term Storage.............................................................................................................................. 10

Compressor and packaged equipment storage log..............................................................................10

Preparing Compressor for Storage..........................................................................................................11

Maintaining Compressor in Storage........................................................................................................11

Description........................................................................................................................................... 12

SGC/SGX Compressors.............................................................................................................................. 12

Compressor Lubrication System.............................................................................................................. 13

Oil Pump......................................................................................................................................................13

Construction Details............................................................................................................................13

Housing....................................................................................................................................................... 13

Rotors.......................................................................................................................................................... 14

Bearings...................................................................................................................................................... 14

Shaft seal.....................................................................................................................................................14

Stepless capacity control...........................................................................................................................14

Volumizer variable volume ratio control.................................................................................................14

Motor mount.............................................................................................................................................. 14

Installation...................................................................................................................................................... 16

Design Limits........................................................................................................................................16

Outline Dimensions.............................................................................................................................16

Holding Charge and Storage..............................................................................................................41

Rigging and Handling......................................................................................................................... 41

Lifting instructions..................................................................................................................................... 42

Foundation........................................................................................................................................... 44

Customer Connections........................................................................................................................45

Oil System Requirements................................................................................................................... 45

Oil selection.................................................................................................................................................46

Oil pressure.................................................................................................................................................46

Balance piston oil requirements and regulations..................................................................................46

Oil Filters............................................................................................................................................... 51

Oil Heaters............................................................................................................................................51

Compressor Oil.................................................................................................................................... 51

Oil Pump............................................................................................................................................... 51

Compressor.......................................................................................................................................... 51

SGC/SGX Rotary Screw Compressor IOM (MK2) 3

Motor Mounting Using Tunnel...........................................................................................................52

Motor Mounting - Foot Mounted Only.................................................................................................... 52

Compressor/motor coupling requirments............................................................................................. 52

Coupling Alignment Requirements - Foot Mounted Only.....................................................................53

Dehydration/Evacuation Test.............................................................................................................53

Electrical Installation........................................................................................................................... 53

Slide stop transmitter................................................................................................................................ 53

Capacity slide valve transmitter............................................................................................................... 54

Directional control valves..........................................................................................................................55

Compressor Hydraulic System...........................................................................................................55

Volumizer Volume Ratio Control........................................................................................................58

Operation........................................................................................................................................................ 59

Operation and Start-Up Instructions................................................................................................ 59

Low Ambient Temperature Operation..............................................................................................59

Initial Start-Up......................................................................................................................................59

Initial start-up procedure..........................................................................................................................59

Normal start-up procedure.......................................................................................................................60

Maintenance................................................................................................................................................... 61

General Information............................................................................................................................61

Normal Maintenance Operations......................................................................................................61

General Maintenance..........................................................................................................................62

Changing Oil.........................................................................................................................................62

Recommended Maintenance Program.............................................................................................63

Maintenance schedule........................................................................................................................ 64

Vibration Analysis................................................................................................................................ 65

Oil Quality and Analysis...................................................................................................................... 65

Operating Log.............................................................................................................................................66

Troubleshooting Guide....................................................................................................................... 66

Abnormal Operation Analysis and Correction........................................................................................66

Capacity linear transmitter replacement - slide valve........................................................................... 68

Volumizer® transmitter replacement - slide stop................................................................................. 69

Bare Compressor Replacement......................................................................................................... 70

Shutdown Due to Improper Oil Pressure - High Stage and Booster.............................................70

Forms............................................................................................................................................................... 71

Rotary Screw Compressor Operating Log Sheet............................................................................. 71

Read this First: Compressor Prestart Checklist................................................................................72

Mechanical Checks.....................................................................................................................................72

Drive Train Alignment......................................................................................................................... 73

Operating Log Sheet........................................................................................................................... 74

Vibration Data Sheet........................................................................................................................... 75

Revisions..........................................................................................................................................................76

SGC/SGX Rotary Screw Compressor IOM (MK2)4

Safety precaution definitions

This manual contains rigging, assembly, start-up, and maintenance instructions. Read

thoroughly before beginning installation. Failure to follow these instructions result in

personal injury or death, damage to the unit, or improper operation.

DANGER

Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

Indicates a potentially hazardous situation or practice which, if not avoided, will result in death or

serious injury.

CAUTION

Indicates a potentially hazardous situation or practice which, if not avoided, will result in damage to

equipment and/or minor injury.

NOTICE

Indicates an operating procedure, practice, etc., or portion thereof which is essential to highlight.

The information contained in this document is subject to change without notice.

5SGC/SGX Rotary Screw Compressor IOM (MK2)

General Information

Preface

This manual describes the installation, operation, and maintenance procedures of SGC, SGCB/H,

and SGXB/H Rotary Screw Compressors (referred to in this document as SGC or SGX). The term SGC

refers to the 1913, 1918, 2313, 2317, 2321, 2813, 2817, 2821, and 2824 SGC units, as well as the 3511,

3515, and 3519 SGCB and SGCH units. The term SGX refers to the 3519, 4013, 4018, and 4021 SGXB

and SGXH units, as well as the 3524 SGXB unit.

NOTICE

FRICK screw compressor repair must only be done by skilled mechanics who have completed training at

FRICK screw compressor school.

It is most important that these compressors be correctly applied to an adequately controlled

refrigerant or gas system. Consult your authorized Johnson Controls-FRICK representative for

expert guidance in this determination.

Proper performance and continued satisfaction with these units is dependent upon:

• Correct Installation

• Proper Operation

• Regular, Systematic Maintenance

• Proper Package and System Engineering

To ensure correct installation and application, the equipment must be correctly selected and

connected to a correctly designed and installed system. The engineering plans, piping layouts, for

example, must be detailed in accordance with the best practices and local codes, such as those

outlined in ASHRAE and EN codes.

A screw compressor is a vapor pump. To ensure that working fluid in the liquid state is not being

ingested, perform the following steps:

• Select controls carefully. Make sure they are in good operating condition.

• Size piping and arrange traps correctly, if they are necessary.

• Check that the suction line has an accumulator or slugging protection.

• Know the load surges and make provisions for control.

• Check that operating cycles and stand still periods are reasonable

• Size high side components within system and compressor design limits.

It is necessary to keep the discharge temperature high enough to prevent condensation of any

moisture in the compressor and oil separator

Design Limitations

SGC/SGX compressors are designed for operation within the pressure and temperature limits

specified by Johnson Controls-FRICK and the Johnson Controls-FRICK selection software CoolWare™.

They are primarily used for compressing refrigerant gas and most hydrocarbon gasses.

If your application is for sour gas, there are special requirements to protect the compressor.

Contact Johnson Controls-FRICK Compressor Engineering for application details.

SGC/SGX Rotary Screw Compressor IOM (MK2)6

Job Inspection

Immediately upon delivery examine all crates, boxes, and exposed compressor and component

surfaces for damage. Unpack all items and check against shipping lists for any discrepancy.

Examine all items for damage in transit.

Standard Bare Compressor

Items not included with bare compressor that are available as sales order options:

• Motor mount

• Solenoid valve block

• Solenoid valves

• Tank drain tubing (T connection)

• Oil feed line (P connection)

• Connection fittings

• Coupling

Transit Damage Claims

All claims must be made by consignee. This is an ICC requirement. Request immediate inspection

by the agent of the carrier and be sure the proper claim forms are executed. Report damage or

shortage claims immediately to Johnson Controls-FRICK Sales Administration Department, in

Waynesboro, PA.

Compressor Identification

Each compressor has an identification data plate, containing compressor model and serial number,

mounted on the compressor body.

NOTICE

When inquiring about the compressor or unit, or ordering repair parts, provide the model and serial

numbers from the data plate. See Figure 1.

7SGC/SGX Rotary Screw Compressor IOM (MK2)

Figure 1: Identification data plate

Rotary screw compressor serial numbers identify the factory that the compressor was

manufactured in and its build date. They are defined by the following information:

Example: 1024 0 A 9 0000015 Z

Plant Decade Month Year Global

Seq no.

Additional

Remarks

1024 0 A 9 0000015 Z

Month:

• A = JAN, B = FEB, C = MAR, D = APR, E = MAY, F = JUN,

• G = JUL, H = AUG, K = SEP, L = OCT, M = NOV, N = DEC

Additional Remarks:

• R = Remanufactured

• R1 = Rebuild

• R2 = Rebuild Plus

• Z = Deviation from base configuration.

The name plates in Figure 2 show which refrigerants are compatible with the compressor as

manufactured.

SGC/SGX Rotary Screw Compressor IOM (MK2)8

Figure 2: Refrigerant nameplates

Table 1: Geometrical swept volume

Rotor

diameter

Rotor Max

speed

Geometrical swept

volume drive shaft

end

Displacement

3550 rpm

2950 rpmCompressor

model

mm L/D rpm ft³/ rev m³/rev cfm m³/h

SGC 1913 1.35 4,500 0.16653 0.004713 591 834

SGC 1918

193

1.8 4,500 0.22204 0.006284 788 1,112

SGC 2313 1.35 4,500 0.29301 0.008292 1,040 1,468

SGC 2317 1.7 4,500 0.36897 0.010442 1,310 1,848

SGC 2321

233

2.1 4,500 0.45580 0.012899 1,618 2,283

SGC 2813 1.35 4,200 0.52501 0.014858 1,864 2,630

SGC 2817 1.7 4,200 0.66115 0.018711 2,347 3,312

SGC 2821 2.1 4,200 0.79546 0.022512 2,824 3,985

SGC 2824

283

2.4 4,200 0.89858 0.025430 3,190 4,501

SGCH/B

3511

1 .1 3,600 0.82248 0.023276 2,920 4,120

SGCH/B

3515

1.5 3,600 1.12154 0.031739 3,981 5,618

SGCH/B

3519

1.9 3,600 1.42748 0.040398 5,068 7,150

SGXB 3519 1.9 3,600 1.42748 0.040398 5,068 7,150

SGXB 3524

355

2.4 3,600 1.80328 0.051033 6,402 9,033

SGXH 3519 355 1.9 3,600 1.42748 0.040398 5,068 7,150

SGXH 4013 1.3 3,600 1.41180 0.03998 5,012 7,076

SGXH 4018 1.8 3,600 1.95481 0.05535 6,940 9,798

SGXH 4021

408

2.1 3,600 2.31319 0.06550 8,212 11,594

9SGC/SGX Rotary Screw Compressor IOM (MK2)

Long-term Storage

Long-term storage (6 months to 5 years) provisions are required, regardless of storage

environment, if start-up and useful operation does not occur within six (6) months of equipment

shipment. Special provisions may be required for storage of less than six (6) months if the storage

area is subject to unusual environmental conditions such as high humidity, large changes in

temperature, or dusty atmosphere.

The standard Johnson Controls-FRICK Warranty for aSGC/SGX screw compressor covers 12 months

from start-up or 18 months from shipment, whichever comes first. Make arrangements with the

local Johnson Controls-FRICK service organization (arranged through factory service) regarding

surveillance and maintenance during the storage period. It is the customer’s responsibility to

submit a monthly report showing the condition of the unit and noting any discrepancies to the

guidelines listed herein. Failure to comply with this Long Term Storage recommendation may void

the warranty.

Long term storage of equipment may lead to the deterioration of components over the period

of time. Synthetic components in the compressor may deteriorate over time even if they are kept

flooded with oil. A warm and dry environment is essential to minimize environmental and corrosion

damage. Long term storage of the affected equipment at a customer’s site may involve additional

requirements.

Follow the guidelines in Preparing Compressor for Storage and Maintaining Compressor in Storage to

maintain the screw compressor warranty.

Compressor and packaged equipment storage log

Table 2: Compressor and packaged equipment storage log

Model Serial

no.

Compressor*

shaft rotation

1 1/2 Turn

Rotor

housing

charge

Charge

added

Visual

inspection

per QAI-3

Charge Checked

by

Date

*Compressor, Motor, Oil Pump, and Refrigerant Pump

SGC/SGX Rotary Screw Compressor IOM (MK2)10

Preparing Compressor for Storage

If it is necessary to store the compressor for use at a later date, peform the following steps:

1. Evacuate the compressor to remove moisture.

2. Connect the evacuation lines to port SM1.

3. Connect the evacuation lines to the three Schrader access valves provided with the

compressor. One valve is connected to the compressor suction and the other two valves are

located at the block on the cylinder.

4. Break vacuum with dry nitrogen and bring pressure to 0 psig.

5. Pump oil into the SM1. Johnson Controls-FRICK recommends break-in oil P/N 111Q0831809 for

storage purposes.

6. After the compressor is oil charged, pressurize to 15 psig with nitrogen.

The amounts of oil needed for each compressor are:

193 mm: 12 gal 355 mm: 35 gal

233 mm: 15 gal 408 mm: 50 gal

283 mm: 25 gal

Maintaining Compressor in Storage

• Ensure that the 5 psig to 15 psig nitrogen charge is maintained. 15 psig is preferred.

• Rotate the male rotor shaft every two weeks. Mark the shaft to ensure the rotor does not

return to the original position.

• Store the compressor inside a dry building environment.

• Grease the male rotor shaft to prevent rust.

• Record all information in a Compressor Long Term Storage Log.

What to do next:

Contact Johnson Controls-Frick Service with any questions regarding long-term storage.

11SGC/SGX Rotary Screw Compressor IOM (MK2)

Description

SGC/SGX Compressors

FRICK SGC/SGX rotary screw compressors utilize mating asymmetrical profile helical rotors to

provide a continuous flow of vapor, designed for both high-pressure and low-pressure applications.

The compressors incorporate the following features:

• High-capacity roller bearings to carry radial loads at both the inlet and outlet ends of the

compressor.

• Heavy-duty, four-point contact ball or angular-contact bearings are mounted at the discharge

end of the compressor to carry axial loads.

• Balance pistons, located in the inlet end of the compressor, reduce axial loads on the male

axial bearings to increase bearing life.

• 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.

• Volumizer® volume ratio control to allow infinitely variable volume ratio (Vi) from 2.2 to 5.0 for

most SGC models during compressor operation:

- 2824, Vi = 2.0 to 4.1

- 3524, Vi = 2.4 to 4.5

- 4021, Vi = 2.2 to 4.3

• A hydraulic cylinder to operate the slide stop and slide valve.

• For SGC/SGX models up to 355, housings constructed of class 40 grey cast iron have a design

working pressure (DWP) of 400 psig. Those contrusted of ductile iron or steel are rated for

a DWP of 600 psig. For 408 compressors, 4013 models are rated for 700 psig, while 4018 and

4021 models are rated for 600 psig.

• Bearing and control oil vents to closed thread in the compressor instead of suction pressure to

avoid performance penalties from superheating and displacing suction gas.

• Shaft seal housing is designed to maintain operating pressure on seal well below discharge

pressure for increased seal life.

• Oil injected into the rotors to maintain good volumetric and adiabatic efficiency even at very

high compression ratios.

• The shaft rotation is clockwise when facing the compressor and is suitable for all types of

drives.

WARNING

Compressor rotation is clockwise when facing the compressor drive shaft. Never operate the

compressor in reverse rotation as this results in bearing damage.

• Suction and discharge flanges are ANSI B16.1 Class 300 for all except the SGX 4013 model. SGX

4013 has Class 400 suction and discharge flanges.

• Integral suction strainers are provided for all models except the SGX 35XX and 408 series.

These models must be fitted with a suitable strainer, #60 mesh x .0065 in. diameter stainless

steel wire or better, to prevent damage to the compressor from particles entering the suction

area.

SGC/SGX Rotary Screw Compressor IOM (MK2)12

Compressor Lubrication System

The lubrication system on SGC/SGX screw compressor units performs several functions:

• Provides lubrication to bearings and seal.

• Provides a cushion between the rotors to minimize noise and vibrations.

• Helps keep the compressor cool and preventsoverheating.

• Provides an oil supply to hydraulically actuate the slide valve and slide stop.

• Provides oil pressure to the balance piston to help increase bearing life. Some applications/

operating conditions require a regulated pressure to the balance piston.

• Provides an oil seal between the rotors to prevent rotor contact or gas bypassing.

• On SGX models, provides oil supply to the squeeze film dampers.

Oil Pump

A demand oil pump is required for low differential pressure applications. CoolWare™ provides a

warning when the oil differential pressure is too low. Oil being supplied to the compressor from the

oil separator is at system discharge pressure. Within the compressor, oil porting to all parts of the

compressor is vented back to a location in the compressor’s body that is at a pressure lower than

compressor discharge pressure. All oil entering the compressor is moved by the compressor rotors

out the compressor outlet and back to the system oil separator

All SGX compressors are equipped with squeeze film dampers (SFD) in the rotor blocking

diameters. Depending on operating conditions and power consumption, a full time and full lube oil

pump is required to supply oil to the compressor (SB-3 and SB-4 ports) at a pressure up to 40 psi

to 50 psi above discharge pressure. Coolware provides the exact calculation at the actual operating

condition. If the calculation information is not available, ensure the oil pressure is a minimum of 40

psi above discharge pressure.

On all SGH compressors, the oil pressure to the balance piston must be controlled and regulated

through the SB-2 compressor port. For booster and low pressure applications, SB-2 may not need

to be connected. For higher operating pressure a balance piston regulator (BPR) must be installed

and piped to the SB-2 connection

Since there are several variants of the BPR, use Coolware to select the best option. Correct

BPR information and pressure settings are required. Do not run the compressor without his

information.

NOTICE

Do not run the compressor without the correct balance piston regulator information and pressure

settings

Construction Details

Housing

Castings for SGC/SGX screw compressors through model 3524 are close grain, pressure tight,

and grey cast iron to ensure structural integrity and mechanical and thermal stability under all

operating conditions. Ductile iron housings are also available for special applications.

Standard casing material for SGX 4013-4021 compressor models is ductile iron grade 60-40-18 per

ASTM A395 and ASME SA395. Contact Johnson Controls – FRICK sales for additional information.

13SGC/SGX Rotary Screw Compressor IOM (MK2)

Rotors

The rotors are made from the highest quality steel bar-stock or forgings to the exacting tolerances

of FRICK designed high-efficiency rotor profiles. The four-lobed male rotor (5 lobes on 408) is

connects directly to the driver. The six-lobed female rotor (7 lobes on 408) is driven by the male on

a thin oil film.

Bearings

Antifriction bearings with L10 rated life in excess of 50,000 hours at design conditions (using the

FRICK Superfilter) are used for reduced frictional horsepower and superior rotor positioning. This

results in reduced power consumption, particularly at higher pressure ratios. Cylindrical roller

bearings are provided to handle the radial loads and the thrust loads are absorbed by four point

contact or angular contact bearings. In addition, thrust balance pistons are provided to reduce the

thrust load and improve bearing life.

Shaft seal

The compressor shaft seal is a single-face type with a spring-loaded carbon stationary surface

riding against a cast iron rotating seat. The seal is capable of withstanding static pressure up to 600

psig. During operation it vents to low pressure to provide extended life.

The 408 compressors utilize silicon-silicon carbide seal face material.

Stepless capacity control

Capacity control is achieved by using a movable slide valve. The slide valve moves axially under the

rotors to provide fully modulated capacity control from 100% to minimum load capacity. Minimum

load capacity varies slightly with compressor model, pressure ratio, discharge pressure level, and

rotor speed. See the Table 1 for minimum capacity for all SGC models.

The slide valve is positioned by hydraulic movement of its control piston. When in the unloaded

position, gas is bypassed back to suction through a recirculation slot before compression begins

and any work is expended, providing the most efficient unloading method available or part-load

operation of a screw compressor.

Volumizer variable volume ratio control

The FRICK compressor includes a method of varying the internal volume ratio to match the system

pressure ratio. Control of the internal volume ratio eliminates the power penalty associated with

over- or under-compression. Volume ratio control is achieved by using a slide stop, a movable

portion of the rotor housing that moves axially with the rotors to control discharge port location.

The slide stop is moved by hydraulic actuation of a control piston. The range of adjustment is listed

in the Table 3.

Motor mount

SGC/SGX models through 3524 are designed with a drive end flange that mates with a cast iron

motor mount (available as a sales order option). The motor mount is precision machined so that it

ensures proper alignment of the compressor and motor coupling.

SGC/SGX Rotary Screw Compressor IOM (MK2)14

Table 3: Compressor volume and capacity ratio

SGC model Min. Vi(1) Max. Vi Min. capacity % Slide valve and slide stop travel

1913 2.2 5.0

1918 2.2 5.0

2313 2.2 5.0

2317 2.2 5.0

2321 2.2 5.0

2813 2.2 5.0

2817 2.2 5.0

2821 2.2 5.0

2824 2.0 4.1

3511 2.2 5.0

3515 2.2 5.0

3519 2.2 5.0

3524 2.4 4.5

4013 2.2 5.0

4018 2.2 5.0

4021 2.2 4.3

Refer to CoolWare Refer to NS-7-11

Compressor volume ratio and capacity

information

1. Optional 1.7 - 3.0 Vi

15SGC/SGX Rotary Screw Compressor IOM (MK2)

Installation

Design Limits

Information for all of the models is provided below. See CoolWare to determine the limits for a

specific application.

SGC/SGX compressor models are primarily designed to connect to an electric drive motor using a

tunnel mount. If the application requires, the compressor can also be driven with a foot-mounted

motor. The tunnel mount ensures proper alignment of the compressor and motor so that the

shaft seal and coupling operate properly. The rotor and bearing design set limitations must not be

exceeded (Refer to CoolWare). Refer to 090.020-M - FRICK Compressor Control Panel for additional

information on set-point limits.

For proper piping, also refer to the FRICK package manual, 070.610-IOM - RWF II Rotary Screw

Compressor Units, Models 100 through 1080.

Outline Dimensions

Drawings, for reference only, can be found in Figure 3 to Figure 9. Complete dimensions and access

connections can be found on the outline drawings.

SGC 1913 and 1918 DWG# 534E0677

SGC 2313 and 2317 DWG# 534E0700

SGC 2321 DWG# 534E0714

SGC 2813 and 2817 DWG# 534E0749

SGC 2821 DWG# 534E0768

SGC 2824 DWG# 534E0973

SGCH 3511 and SGCB 3511 DWG# 534E0966

SGCH 3515 and SGCB 3515 DWG# 534E0971

SGCH 3519 and SGCB 3519 DWG# 534E0972

SGXH 3519 and SGXB 3519/3524 DWG# 534E1405

SGXH 4013, 4018, and 4021 DWG# 534E1403

If you do not have these drawings, request any you require by contacting Johnson Controls - FRICK

sales.

SGC/SGX Rotary Screw Compressor IOM (MK2)16

Figure 3: Port locations, SGC 1913/1918

17SGC/SGX Rotary Screw Compressor IOM (MK2)

Port Thread size (in.) Description

P 3/4-16 UNF-2B straight THD O-ring Manifold block pressure

SB-2 3/4-16 UNF-2B straight THD O-ring Balance piston and inlet bearings

SB-3 1 1/16-12 UN-2B straight THD O-ring Compressor oil supply

SC-5 9/16-18 UNF-2B straight THD O-ring Inlet pressure

SC-6 9/16-18 UNF-2B straight THD O-ring Discharge pressure

SC-7 1/8-27 NPTF Seal weepage

SC-8 1 1/16-12 UN-2B straight THD O-ring Closed thread drain

SC-9 9/16-18 UNF-2B straight THD O-ring Inlet housing oil drain

SC-13 9/16-18 UNF-2B straight THD O-ring Oil drain cylinder

SC-14 9/16-18 UNF-2B straight THD O-ring Liquid injection bleed

SD-1 1 1/16-12 UN-2B straight THD O-ring Coalescer bleed

SE-1 1/2-14 NPTF Electrical connector

SL-1 1 1/16-12 UN-2B straight THD O-ring Low Vi liquid injection

SL-2 1 1/16-12 UN-2B straight THD O-ring Hi Vi liquid injection

SM-1 1 1/16-12 UN-2B straight THD O-ring Main oil injection

SV-1 1 1/2 square flange Vapor injection-tongue and groove

TE-1 3/4-14 NPTF Suction gas temperature element

T 9/16-18 UNF-2B straight THD O-ring Manifold block tank

SGC/SGX Rotary Screw Compressor IOM (MK2)18

19SGC/SGX Rotary Screw Compressor IOM (MK2)

Figure 4: Port locations, SGC 2313/2317

SGC/SGX Rotary Screw Compressor IOM (MK2)20

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Frick SGC/SGX Rotary Screw Compressor Installation Operation and Maintenance Guide

Frick SGC/SGX Rotary Screw Compressor Installation Operation and Maintenance Guide

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