Emerson Vilter VSS Instruction manual

VSS/VSM/VSH/VSSH Compressor Unit
Installation, Operation & Maintenance Manual
FOR UNITS BUILT AFTER JANUARY 1, 2015

i
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
What is covered & how long it is covered: Subject to the other terms of this Warranty Statement, Seller warrants to its
direct purchasers (and to no others) that the Products it manufactures will be free from defects in material and work-
manship under normal use, regular service and maintenance. This warranty only applies when such defect appears
in the Products within 12 months (“m”) from the date such Products are placed in service and when such Products
are returned to and received by Seller within 18m from the date of manufacture by Seller (“12m/18m”), except that
defects in the following Products different than 12m/18m are covered by the number of months indicated below if
returned to Seller within the following number of months (“m Ship”) from shipment by Seller—
What is not covered: This warranty does not extend to any losses or damages due to misuse; corrosion; accident;
abuse; neglect; normal wear and tear; negligence (other than Seller’s); unauthorized alteration; use beyond rated ca-
pacity; acts of God; war or terrorism; unsuitable power sources or environmental conditions; operation with refrigera-
tion or lubricants which are not suitable for use with the Product; improper installation, repair, handling, maintenance
or application; substitution of parts not approved by Seller; or any other cause not the fault of Seller. This warranty is
only applicable to Products properly maintained and used according to Seller’s instructions, the use of genuine Vilter™
replacement parts and recommended oil in all repairs, and when Buyer has demonstrated adherence to a scheduled
maintenance program as detailed in the applicable operating manual. The Buyer must use Vilter approved oil only and
provide oil analysis results to Vilter. To the extent the Buyer has supplied specications, information, representation of
operating conditions or other data to Seller in the selection or design of the Products and the preparation of Seller’s
quotation, and in the event that actual operating conditions or other conditions differ from those represented by
Buyer, any warranties or other provisions contained herein which are affected by such conditions will be null and void.
Seller does not warrant that the Products comply with any particular law or regulation not explicitly provided in the
Product specications, and Buyer is responsible for ensuring that the Products contain all features necessary to safely
perform in Buyer’s and its customers’ plants and operations. If the Products are for a gas compression application,
this warranty does not apply if the Products are operated in conjunction with a gas with an H2S level above 100 PPM.
Product
Compressor Type
Reciprocating
Compressors
VSS / VSM Refrigeration
Compressors
VSG / VSSG Gas
Compressors
New Unit 24m Ship 24m Ship 12m/18m
Compressor
(New Unit Only) 24m Ship 60m Ship 12m/18m
New Bareshaft
Compressor 24m Ship 24m Ship 12m/18m
Remanufactured
Compressor 12m/18m 12m/18m 12m/18m
Any Engineered to Order (ETO) packaged system (including Heat Pumps and
Process Chillers) not described above carry the 12m/18m warranty.
VSS / VSM single screw compressors installed and shipped on New Units carry
an internal Product component warranty of 5 years from shipment date and a
warranty of 15 years from shipment date for compressor bearings only. Does
not include actuator motors and shaft seals.
Vilter™ Genuine OEM Parts, retrot Vission 20/20 panels, retrot PLC panels and
any other supplied equipment not described above carry a 12m warranty from
shipment date.
New Vapor Recovery Units (“VRU Units”) and its Compressors carry the stan-
dard 12m/18m warranty—all other VRU parts carry a 6 m warranty from ship-
ment date.
Standard VILTER™ Warranty Statement

ii VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Third Party Motors & Starters: Motors and starters or Motor & Starter Parts purchased by Seller from a third party
for resale to Buyer or for incorporation into Seller’s Product will carry only the warranty extended by the original
manufacturer (“OEM”). Motor manufacturer warranties cover only the repair or replacement of the motor, and do not
cover removal and installation charges, incidental charges associated with the removal and installation process, loss
of product, or shipping to and from the manufacturer or approved shop. The individual motor manufacturer warranty
terms can be found on the manufacturer’s associated websites.
Other limitations: Seller will not be liable under the above warranty if Buyer is in default of its payment obligations
to Seller under any purchase order or credit agreement. Except with Seller’s written permission given after receipt of
Buyer’s request within 60 days of an event, Seller will not be responsible for costs of dismantling, lost refrigerant, reas-
sembling, repair labor and expenses, travel cost or transporting the Product. Products repaired or replaced under this
warranty will be warranted for the unexpired portion of the warranty applying to the original Products. Buyer agrees
that all instructions and warnings supplied by Seller will be passed on to those persons who use the Products. Products
are to be used in their recommended applications and all warning labels adhered to the Products by Seller must be left
intact. Any technical advice furnished by Seller before or after delivery in regard to the use, application or suitability of
the Products may not be construed as an express warranty unless conrmed by Seller in writing, and Seller assumes
no obligation or liability for the advice given or results obtained—all advice given and accepted at Buyer’s sole risk.
Exclusive Remedy: Within (10) ten days after Buyer’s discovery of any warranty defects within the warranty period,
Buyer will notify Seller of such defect in writing. Seller will, at its option and as Buyer’s exclusive remedy, repair, correct,
or replace F.O.B. point of manufacture, or issue credit or refund the purchase price for, that portion of the Products
found by Seller to be defective. Failure by Buyer to give such written notice within the applicable time period will be
deemed an absolute and unconditional waiver of Buyer’s claim for such defects. Buyer assumes all other responsibility
for any loss, damage, or injury to persons or property arising out of, connected with, or resulting from the use of the
Products, either alone or in combination with other products/components. If so required, Products or parts for which
a warranty claim is made are to be returned transportation prepaid to Seller’s factory. THE FOREGOING CONSTITUTES
THE SOLE AND EXCLUSIVE REMEDY FOR BREACH OF ANY WARRANTY HEREUNDER.
SOLE WARRANTY: THE WARRANTIES ABOVE CONSTITUTE SELLER’S SOLE AND EXCLUSIVE WARRANTIES WITH
RESPECT TO THE PRODUCTS AND ARE IN LIEU OF AND EXCLUDE ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,
ARISING BY OPERATION OF LAW OR OTHERWISE, INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE WHETHER OR NOT THE PURPOSE OR USE HAS BEEN DISCLOSED TO SELLER IN SPECIFICATIONS,
DRAWINGS OR OTHERWISE, AND WHETHER OR NOT SELLER’S PRODUCTS ARE SPECIFICALLY DESIGNED AND/OR
MANUFACTURED BY SELLER FOR BUYER’S USE OR PURPOSE.
LIMITATION OF LIABILITY: SELLER SHALL NOT BE LIABLE FOR DAMAGES CAUSED BY DELAY IN PERFORMANCE AND
THE REMEDIES OF BUYER HEREIN ARE EXCLUSIVE. IN NO EVENT, REGARDLESS OF THE FORM OF THE CLAIM OR
CAUSE OF ACTION (WHETHER BASED IN CONTRACT, INFRINGEMENT, NEGLIGENCE, STRICT LIABILITY, OTHER TORT
OR OTHERWISE) SHALL SELLER’S LIABILITY TO BUYER AND/OR ITS CUSTOMERS EXCEED THE PRICE PAID BY BUYER
FOR THE SPECIFIC PRODUCTS OR PORTION OF THE PRODUCTS PROVIDED BY SELLER GIVING RISE TO THE CLAIM OR
CAUSE OF ACTION, AND BUYER SHALL INDEMNIFY AND HOLD HARMLESS SELLER FOR ANY DAMAGES INCURRED
BY SELLER IN EXCESS THEREOF. BUYER AGREES THAT IN NO EVENT SHALL SELLER’S LIABILITY TO BUYER AND/OR ITS
CUSTOMERS EXTEND TO INCLUDE INCIDENTAL, CONSEQUENTIAL OR PUNITIVE DAMAGES. The term “consequential
damages” includes loss of anticipated prots, business interruption, loss of use, revenue, reputation and data, costs in-
curred, including for capital, fuel, power and loss or damage to capital or equipment. Buyer agrees that all instructions
and warnings supplied by Seller will be passed on to those persons who use the Products. Seller’s Products are to be
used in their recommended applications and all warning labels adhered to the Products by Seller are to be left intact.
Standard VILTER™ Warranty Statement

iii
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Important Message
READ CAREFULLY BEFORE INSTALLING AND STARTING YOUR COMPRESSOR.
The following instructions have been prepared to assist in installation, operation and removal of VilterTM Single Screw
Compressors. Following these instructions will result in a long life of the compressor with satisfactory operation.
The entire manual should be reviewed before attempting to install, operate, service or repair the compressor.
Only qualified personnel shall operate, install and maintain the equipment.
Qualified personnel shall be accredited by a local regulatory agency, which requires that they are continually scruti-
nized by an organization whose sole mission is to establish, maintain and assure that the highest industry standards
are set and met in a continuous and ongoing basis. The credentials shall address topics ranging from plant safety,
operating concepts and principles and operations through the basics of refrigeration compliance and PSM (Process
Safety Management) requirements.
Follow local workplace occupational safety and health regulations.
A compressor is a positive displacement machine. It is designed to compress gas. The compressor must not
be subjected to liquid carry over. Care must be exercised in properly designing and maintaining the system to
prevent conditions that could lead to liquid carry over. Vilter Manufacturing is not responsible for the system
or the controls needed to prevent liquid carry over and as such Vilter Manufacturing cannot warrant equipment
damaged by improperly protected or operating systems.
VilterTM screw compressor components are thoroughly inspected at the factory. However, damage can occur
in shipment. For this reason, the equipment should be thoroughly inspected upon arrival. Any damage noted
should be reported immediately to the Transportation Company. This way, an authorized agent can examine
the unit, determine the extent of damage and take necessary steps to rectify the claim with no serious or costly
delays. At the same time, the local Vilter representative or the home office should be notified of any claim made.
All inquires should include the VilterTM sales order number, compressor serial and model number. These can be found
on the compressor name plate on the compressor.
All requests for information, services or parts should be directed to:
Vilter Manufacturing LLC
Customer Service Department
5555 South Packard Ave
Cudahy, WI 53110 USA
Telephone: [phone]; Fax:[phone]
E-mail: [e-mail]; Web: Emerson.com/Vilter
Equipment Identification Numbers:
Vilter Order Number: _______________________Compressor Serial Number: _________________
Vilter Order Number: _______________________Compressor Serial Number: _________________

iv VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
EC Declaration of Incorporation
We hereby declare that the following machinery is intended to be incorporated into other machinery, and must
not be put into service until the relevant machinery into which it is to be incorporated has been declared in con-
formity with the essential requirements of the Machinery Directive 2006/42/EC.
Machine Description: Industrial Compressor
Make: Vilter
Type: VSM / VSS / VSH / VSSH / VSG & VSSG Single Screw Compressor
Model Size: 97, 113, 127, 128, 145, 160, 180, 204, 222, 243, 152, 182, 202, 301, 361, 401, 501, 601,
701, 291, 341, 451, 601, 751, 901, 791, 891, 1051, 1201, 1301, 1551, 1851, 2101, 2401,
2601, 2801, 3001
Manufactured by: Vilter Manufacturing, LLC.
The following transposed harmonised European Standards have been used:
EN ISO 12100-1:
2010
- Safety of Machinery - General principles for design-Risk assessment and risk reduction.
EN ISO 13857:
2008
- Safety of Machinery - Safety distances to prevent danger zones being reached by the
upper and lower limbs.
EN349: 1993 + A1:
2008
- Safety of Machinery - Minimum gaps to avoid crushing hazards.
EN ISO 13850:
2015
- Safety of Machinery - Emergency stop equipment - Principles for design.
IEC/EN60204-1 (2016) - Safety of Machinery - Electrical equipment of machines - Specication for general
requirements
A technical construction le for this machinery is retained at the following address:
Vilter Manufacturing, LLC.
5555 South Packard Avenue
P.O. Box 8904, Cudahy
Wisconsin 53110-8904
Signed for and on behalf of Vilter Manufacturing, LLC.:
Last update: May 2019
Vilter Manufacturing, LLC.
5555 South Packard Avenue t P.O. Box 8904 t Cudahy, Wisconsin 53110-8904
001-414- 744-0111 t FAX: [phone]

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VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Table of Contents
Section Title Page Number
Standard Vilter™ Warranty Statement ............................................................................................................i
Important Message.......................................................................................................................................iii
EC Declaration of Incorporation ....................................................................................................................iv
Section 1 • General Information
How To Use This Manual............................................................................................................................. 1-1
Additional Important Notes ....................................................................................................................... 1-1
Refrigeration Compressor Unit Model Designations ................................................................................... 1-2
System Unit Identification ......................................................................................................................... 1-3
Compressor Unit Component Identification............................................................................................... 1-4
Instrument Identification Letters................................................................................................................ 1-7
Symbols Identification ............................................................................................................................... 1-9
Major Component Identification ................................................................................................................ 1-9
Control and Instrument Identification ...................................................................................................... 1-10
Line Type Designations ............................................................................................................................ 1-10
Valve and Instrument Tagging.................................................................................................................. 1-11
Equipment Number Identification............................................................................................................ 1-11
Pipe Line Data Identification..................................................................................................................... 1-12
Section 2 • Theory Of Operation
Refrigerant Flow ........................................................................................................................................ 2-1
Oil Life and Oil Flow.................................................................................................................................... 2-1
Oil Cooling................................................................................................................................................. 2-2
Water Cooled Oil Cooling ............................................................................................................... 2-2
Liquid Injection Oil Cooling............................................................................................................. 2-2
V-Plus Oil Cooling........................................................................................................................... 2-2
Thermosyphon Oil Cooling............................................................................................................. 2-2
Control System .......................................................................................................................................... 2-3
Temperature Elements, Pressure Transmitters and Indicators ......................................................... 2-3
Section 3 • Installation
Delivery Inspection .................................................................................................................................... 3-1
Rigging and Lifting of Compressor Unit...................................................................................................... 3-1
Compressor Unit Inspections Prior To Installation ...................................................................................... 3-2
Recommended On-Site Tools..................................................................................................................... 3-2
Long Term Storage Recommendations....................................................................................................... 3-3
Compressor Motor ......................................................................................................................... 3-3
Long Term Storage Log................................................................................................................... 3-4
Foundation ................................................................................................................................................ 3-5
Considerations Prior To Starting ..................................................................................................... 3-5
Foundation Materials...................................................................................................................... 3-5
Building The Foundation ................................................................................................................ 3-5
Compressor Unit Installation .......................................................................................................... 3-6
Leveling and Grouting .................................................................................................................... 3-7
Additional Information................................................................................................................... 3-8
Operation and Performance ........................................................................................................... 3-8
General Design Requirements ........................................................................................................ 3-8
Stop/Check Valve Installation................................................................................................................... 3-11
Piping .................................................................................................................................................... 3-12
Flange Loads............................................................................................................................................ 3-13
Remote Air-Cooled Oil Cooler Piping ........................................................................................................ 3-14
Electrical Connections ............................................................................................................................. 3-15

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Table of Contents
Section Title Page Number
Field Wiring Instructions .............................................................................................................. 3-15
Testing Refrigeration System For Leaks .................................................................................................... 3-18
Ammonia Systems ....................................................................................................................... 3-18
Halocarbon Refrigerant Systems .................................................................................................. 3-18
CO2 Systems ................................................................................................................................ 3-19
Evacuating The System ............................................................................................................................ 3-19
Notice on Using Non-Vilter Oils................................................................................................................ 3-20
Unit Oil Charging and Priming.................................................................................................................. 3-20
Unit Initial Oil Charging ................................................................................................................ 3-21
Priming Oil Lines and Compressor ................................................................................................ 3-21
System Refrigerant Charging ................................................................................................................... 3-22
Low Side Equipment..................................................................................................................... 3-22
Compressors................................................................................................................................ 3-22
Condensers .................................................................................................................................. 3-22
Controls ....................................................................................................................................... 3-22
Initial High Side Charging ............................................................................................................. 3-22
Section 4 • Operation
Notice on Using Non-Vilter Oils.................................................................................................................. 4-1
Operation .................................................................................................................................................. 4-1
Oil Inspection ............................................................................................................................................ 4-1
Dual Oil Filters............................................................................................................................................ 4-2
Control System ......................................................................................................................................... 4-2
Calibration ..................................................................................................................................... 4-2
Starting, Stopping and Restarting The Compressor ........................................................................ 4-2
Emergency Shutdown .................................................................................................................... 4-3
Slide Valve Actuator Operation .................................................................................................................. 4-3
Calibrate Slide Valve Actuators (For Units Using Vission20/20™) ................................................................ 4-4
Calibrate Slide Valve Actuators (For Units Using Compact Logix PLC)........................................................ 4-10
Compressor Control with Vission20/20™ Micro-Controller (No Slide Operation)...................................... 4-15
Coalescing Oil Return Line Setup.............................................................................................................. 4-16
Suction Equalizing Line Setup - For VSS/VSM Compressors....................................................................... 4-17
Dual Oil Filter Setup For Oil Filters With Filter Head Assemblies ................................................................ 4-18
Stop/Check Valve Operation .................................................................................................................... 4-19
Section 5 • Maintenance/Service
Maintenance and Service Schedule - For VSS/VSM Unit Only ...................................................................... 5-1
Maintenance and Service Schedule - For VSH/VSSH Unit Only..................................................................... 5-2
Preventive Maintenance, Checks and Services............................................................................................ 5-4
Daily............................................................................................................................................... 5-4
Weekly........................................................................................................................................... 5-4
Monthly ......................................................................................................................................... 5-4
Trimonthly ..................................................................................................................................... 5-4
Annually......................................................................................................................................... 5-4
Compressor Unit Isolation For Maintenance/Service (Compressors With Slide Valves)................................ 5-5
Recommendations When Servicing (Compressors Without Slide Valves) ................................................... 5-6
Preparation of Unit For Servicing................................................................................................................ 5-6
Compressor Unit Leak Check After Servicing .............................................................................................. 5-7
Oil System Components............................................................................................................................. 5-7
Oil Sampling................................................................................................................................... 5-7
Recommendations ............................................................................................................. 5-7
Installation of The Oil Sampler Valve ................................................................................... 5-8

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VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Table of Contents
Section Title Page Number
Pre-Sampling...................................................................................................................... 5-8
Sampling Procedure ........................................................................................................... 5-8
Oil Sample Analysis Report ............................................................................................... 5-10
Oil Draining.................................................................................................................................. 5-11
Oil Charging ................................................................................................................................. 5-12
Tool Required ................................................................................................................... 5-12
Charging During Operation .............................................................................................. 5-12
Charging During Shutdown .............................................................................................. 5-12
Filter Element Replacement (Single Oil Filter Assembly) and Oil Pump Strainer Servicing .............. 5-13
Drain Oil From Isolated Oil Line ......................................................................................... 5-13
Oil Filter Element Removal (For 3111A Oil Filter Housing) ................................................. 5-14
Oil Filter Element Removal (For 3110A or 3112A Oil Filter Housing) .................................. 5-14
Oil Pump Strainer Screen Removal and Service.................................................................. 5-14
Oil Pump Strainer Screen Installation ................................................................................ 5-15
Oil Filter Element Installation (For 3111A Oil Filter Housing) ............................................. 5-15
Oil Filter Element Installation (For 3110A or 3112A Oil Filter Housing) .............................. 5-15
Filter Element Replacement (Duplex Oil Filter Assembly) .............................................................. 5-16
Removal ........................................................................................................................... 5-16
Installation ....................................................................................................................... 5-17
Filter Element Replacement (Dual Oil Filter Assembly) .................................................................. 5-17
Switching Oil Filters For Maintenance................................................................................ 5-18
Drain Oil From Isolated Oil Filter........................................................................................ 5-19
Oil Filter Element Removal (For 3111A Oil Filter Housing) ................................................. 5-19
Oil Filter Element Removal (For 3110A or 3112A Oil Filter Housing) .................................. 5-20
Oil Filter Element Installation (For 3111A Oil Filter Housing) ............................................. 5-20
Oil Filter Element Installation (For 3110A or 3112A Oil Filter Housing) .............................. 5-20
Oil Separator Coalescing Filter Replacement................................................................................. 5-21
Removal ........................................................................................................................... 5-21
Installation ....................................................................................................................... 5-21
Oil Separator Heater Cartridge Replacement ................................................................................ 5-23
Parts Required .................................................................................................................. 5-23
Removal ........................................................................................................................... 5-23
Installation ....................................................................................................................... 5-23
Drive Coupling Hub (Form-Flex BPU) Installation...................................................................................... 5-24
Straight Bore Hubs ....................................................................................................................... 5-24
Tapered Bore Hubs ....................................................................................................................... 5-24
Drive Center Member Installation and Alignment..................................................................................... 5-25
Drive Coupling Hub (Form-Flex BPU) and Center Member Removal.......................................................... 5-27
Drive Coupling (Type C Sure-Flex) Replacement ....................................................................................... 5-27
Removal....................................................................................................................................... 5-27
Installation................................................................................................................................... 5-28
Coupling Guard Replacement................................................................................................................... 5-29
Removal....................................................................................................................................... 5-29
Installation................................................................................................................................... 5-29
Compressor Replacement ........................................................................................................................ 5-30
Removal....................................................................................................................................... 5-30
Installation................................................................................................................................... 5-31
Bare Shaft Compressor Lifting Points and Weights ................................................................................... 5-31
Bare Shaft Compressor Center of Gravity (Models 291-2101)................................................................... 5-33
Bare Shaft Compressor Center of Gravity (Models 2401-3001)................................................................. 5-34
Compressor Inspection ............................................................................................................................ 5-35
Compressor Shaft Bearing Clearance Inspections ......................................................................... 5-35
Determine Maximum Applied Force.................................................................................. 5-35
Main Rotor Bearing Axial Clearance Inspection.................................................................. 5-35
Main Rotor Bearing Radial Clearance Inspection................................................................ 5-36

TOC − 4 VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Table of Contents
Section Title Page Number
Gaterotor Bearing Inspection ....................................................................................................... 5-37
Gaterotor Inspection .................................................................................................................... 5-38
A) Gaterotor - Main Housing Shelf Clearance..................................................................... 5-38
B) Gaterotor Float Measurement....................................................................................... 5-39
C) Gaterotor Backlash Inspection ...................................................................................... 5-40
Important Notes............................................................................................................... 5-42
Additional Inspections.................................................................................................................. 5-42
Post Inspection............................................................................................................................. 5-42
Gaterotor Assembly Replacement (All Compressors Except VSM 301-701 & VSM 97-127 Compressors) ... 5-42
Removal....................................................................................................................................... 5-42
Installation................................................................................................................................... 5-43
Gaterotor Assembly Replacement (VSM 301-701 Compressors Only)....................................................... 5-46
Removal....................................................................................................................................... 5-46
Installation................................................................................................................................... 5-46
Gaterotor Assembly Replacement (VSM 97-127 Compressors Only)......................................................... 5-48
Removal....................................................................................................................................... 5-48
Installation................................................................................................................................... 5-48
Gaterotor Disassembly (All Compressors Except VSM 97-127 Compressors)............................................. 5-50
Gaterotor Blade Removal.............................................................................................................. 5-50
Gaterotor Blade Installation.......................................................................................................... 5-51
Gaterotor Thrust Bearing Removal................................................................................................ 5-51
Gaterotor Thrust Bearing Installation............................................................................................ 5-51
Gaterotor Roller Bearing Removal................................................................................................. 5-52
Gaterotor Roller Bearing Installation............................................................................................. 5-52
Gaterotor Disassembly (VSM 97-127 Compressors Only) ......................................................................... 5-53
Gaterotor Blade Removal.............................................................................................................. 5-53
Gaterotor Blade Installation.......................................................................................................... 5-53
Gaterotor Thrust Bearing Removal................................................................................................ 5-54
Gaterotor Thrust Bearing Installation............................................................................................ 5-54
Gaterotor Roller Bearing Removal................................................................................................. 5-54
Gaterotor Roller Bearing Installation............................................................................................. 5-54
Compressor Shaft Seal Replacement ........................................................................................................ 5-55
Shaft Seal Assembly ..................................................................................................................... 5-55
Handling Seal Face with Care........................................................................................................ 5-55
Compressor Shaft Seal Replacement - For VSS/VSM Units ............................................................. 5-56
Tools ................................................................................................................................ 5-56
Removal ........................................................................................................................... 5-56
Installation ....................................................................................................................... 5-56
Compressor Shaft Seal Replacement - For VSH/VSSH Units ........................................................... 5-58
Shaft Seal Removal -For Part# 25985Y and 25985YA ......................................................... 5-58
Shaft Seal Removal – For Part# 28985W and 28985WA .................................................... 5-59
Prior to Shaft Seal Installation ........................................................................................... 5-60
Shaft Seal Installation For Part# 25985Y and 25985YA ...................................................... 5-61
Shaft Seal Installation – For Part# 28985W and 28985WA ................................................ 5-61
Slide Valve Actuator Assembly Replacement ............................................................................................ 5-63
Removal....................................................................................................................................... 5-63
Installation................................................................................................................................... 5-63
Actuator Installation Using Anti-Rotation Bolts............................................................................. 5-64
Slide Valve Command Shaft Assembly Replacement................................................................................. 5-65
Removal....................................................................................................................................... 5-65
Installation................................................................................................................................... 5-65
Liquid Injection Control Valve Station....................................................................................................... 5-66
Main Rotor Assembly ............................................................................................................................... 5-68
Torque Specifications............................................................................................................................... 5-68
Using A Torque Wrench Correctly............................................................................................................. 5-69

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VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Table of Contents
Section Title Page Number
Nord-Lock®Washers ................................................................................................................................ 5-69
Section 6 • Troubleshooting
Slide Valve Actuator Troubleshooting Guide............................................................................................... 6-1
Slide Valve Actuator LED Blink Codes.......................................................................................................... 6-4
Troubleshooting Guide - General Problems & Solutions.............................................................................. 6-6
Section 7 • Warranty And Parts
Warranty Claim Processing ........................................................................................................................ 7-1
Motor Warranty Procedure ........................................................................................................................ 7-2
On-Site Service Support............................................................................................................................. 7-3
Remanufactured Bare Shaft Single Screw Compressor Process................................................................... 7-3
Explanation of Rebuild Levels.......................................................................................................... 7-3
Bare Shaft Compressor Description ................................................................................................ 7-3
Section 8 • Spare Parts List
VSH/VSSH Recommended Spare Parts List ................................................................................................. 8-1
VSS Recommended Spare Parts List ........................................................................................................... 8-3
Gaterotor ....................................................................................................................................... 8-5
Shaft Seal ..................................................................................................................................... 8-11
Main Rotor ................................................................................................................................... 8-13
Slide Valve Cross Shafts and End Plate........................................................................................... 8-14
End Plate (VSS 2401 - VSS 3001 Only)........................................................................................... 8-16
Slide Valve Carriage Assembly ...................................................................................................... 8-18
Actuator and Command Shaft ...................................................................................................... 8-21
Miscellaneous Frame Components ............................................................................................... 8-22
Miscellaneous Frame Components Tubing and Fittings................................................................. 8-25
Replacement Tools ....................................................................................................................... 8-25
Replacement Parts ....................................................................................................................... 8-28
VSM 301-701 Recommended Spare Parts List .......................................................................................... 8-31
Gaterotor Assembly ..................................................................................................................... 8-31
Shaft Seal ..................................................................................................................................... 8-34
Main Rotor ................................................................................................................................... 8-35
Slide Valve Cross Shafts and End Plate........................................................................................... 8-36
Slide Valve Carriage Assembly ...................................................................................................... 8-38
Actuator and Command Shaft ...................................................................................................... 8-40
Miscellaneous Frame Components ............................................................................................... 8-41
Housing Accessories..................................................................................................................... 8-43
Replacement Tools ....................................................................................................................... 8-44
VSM 97-127 Recommended Spare Parts List ............................................................................................ 8-46
Kits................................................................................................................................................ 8-47
Appendices
Appendix A Torque Specifications.............................................................................................................. A-1
Appendix B Vilter Oil.................................................................................................................................B -1
Appendix C Vibration Measurements - Single Screw Compressor...............................................................C-1
Appendix D Liquid Injection Valve Setup Instructions & ICM/ICAD Motorized Valve Quick Start Guide .......D-1
Appendix E Liquid Injection Valve Station ICF 20-40 Installation Guide .......................................................E-1
Appendix F Hand-Held Slide Valve Calibration Tool ....................................................................................F-1
Appendix G Pre Start Up for Remote Oil Coolers ........................................................................................G-1

TOC - 6 VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Table of Contents
Table / Figure Page Number
List of Tables and Figures
Tables
Table 3-1. Maximum Allowable Flange Loads ........................................................................................... 3-14
Table 4-1. Command Shaft Rotation Specifications .................................................................................... 4-8
Table 4-2. Stop/Check Valve Open Positions............................................................................................. 4-19
Table 5-1. Maintenance/Service Schedule - For VSS/VSM Unit Only............................................................. 5-1
Table 5-2a. Maintenance/Service Schedule (For VSH/VSSH Unit Only) ........................................................ 5-2
Table 5-2b. Maintenance/Service Schedule (For VSH/VSSH Compressor Only)............................................ 5-3
Table 5-3. Oil Filter Replacement Parts Required....................................................................................... 5-13
Table 5-4. Shaft And Hub Distances.......................................................................................................... 5-24
Table 5-5. Hub Clamp Bolt and Set Screw Torque Specifications ............................................................... 5-25
Table 5-6. Disc Pack Installation Torque Specifications.............................................................................. 5-25
Table 5-7. Clamping Bolts and Set Screw Torque Specifications ................................................................ 5-28
Table 5-8. Bare Shaft Compressor Component Weights............................................................................ 5-31
Table 5-9. Bare Shaft Compressor Component Lifting Hole Sizes .............................................................. 5-31
Table 5-10. Maximum Main Rotor Bearing Clearance ............................................................................... 5-36
Table 5-11. Maximum Gaterotor Bearing Clearance.................................................................................. 5-37
Table 5-12. Gaterotor Float ...................................................................................................................... 5-39
Table 5-13. Backlash Range...................................................................................................................... 5-41
Table 5-14. Gaterotor Tool Kits ................................................................................................................. 5-42
Table 5-15. Shaft Seal Tool Kits................................................................................................................. 5-56
Table 5-16. VSH/VSSH Shaft Seals ............................................................................................................ 5-58
Table 5-17. Coils For Solenoid Valves (ICFE) .............................................................................................. 5-67
Table 5-18. Parts For Motorized Valve Station (ICF)................................................................................... 5-67
Table 5-19. Torque Specifications (ft-lbs).................................................................................................. 5-68
Table 6-1. Slide Valve Actuator Troubleshooting Guide (1 of 3) ................................................................... 6-1
Table 6-2. Slide Valve Actuator LED Blink Codes (1 of 2).............................................................................. 6-3
Table 6-3. Troubleshooting Guide - General Problems & Solutions (1 of 3) .................................................. 6-5
Figures
Figure 1-1. Refrigeration Compressor Unit Components ............................................................................ 1-4
Figure 2-1. Figure 2-1. Refrigeration Compressor Unit P&ID
(Thermosyphon Oil Cooling with Single Oil Filter Shown)........................................................................... 2-1
Figure 3-1. Rigging and Lifting Points (VSS-2101 Compressor Unit Shown) ................................................ 3-1
Figure 3-2. Concrete Pad With Compressor Unit Dimensions - Side View.................................................... 3-6
Figure 3-3. Concrete Pad With Compressor Unit Dimensions - Front View .................................................. 3-7
Figure 3-4. Interior Foundation Isolation .................................................................................................... 3-7
Figure 3-5. Foundation With Housekeeping Pads Dimensions - Top View ................................................... 3-8
Figure 3-6. Housekeeping Pad Dimension Detail - Top View ....................................................................... 3-9
Figure 3-7. Level Compressor Unit Using Top Surface of Spherical Washers ................................................ 3-9
Figure 3-8. Concrete Pad Housekeeping Detail......................................................................................... 3-10
Figure 3-9. Stop/Check Valve Orientation................................................................................................. 3-11
Figure 3-10. Maximum Allowable Flange Loads........................................................................................ 3-13
Figure 3-11. Recommended Remote Air Cooled Oil Cooler Piping ............................................................ 3-14
Figure 3-12. Example - Vission 20/20 Wiring Diagram.............................................................................. 3-16

TOC - 7
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Table of Contents
Table / Figure Page Number
Figure 3-13. Example - Interconnect Wiring Diagram ............................................................................... 3-17
Figure 3-14. Example - V-Plus Wiring Diagram ......................................................................................... 3-17
Figure 3-15. Oil Operating Levels ............................................................................................................. 3-20
Figure 3-16. Oil Drain Valve...................................................................................................................... 3-21
Figure 3-17. Priming Oil Lines and Compressor ........................................................................................ 3-21
Figure 4-1. Oil Operating Levels ................................................................................................................. 4-1
Figure 4-2. Actuator Assembly ................................................................................................................... 4-4
Figure 4-3. Slide Valve Calibration Screen (Vission 20/20) .......................................................................... 4-5
Figure 4-4. Menu Screen and Slide Calibration Button (Vission 20/20)........................................................ 4-6
Figure 4-5. Wire Connections For Capacity and Volume Actuators ............................................................. 4-7
Figure 4-6. Photo-Chopper ........................................................................................................................ 4-9
Figure 4-7. Actuator Assembly ................................................................................................................. 4-10
Figure 4-8. Overview, Main Menu and Instrument Calibration Screens (Compact Logix PLC)..................... 4-12
Figure 4-9. Slide Calibration Screen (Compact Logix PLC) ......................................................................... 4-13
Figure 4-10. Photo-chopper..................................................................................................................... 4-13
Figure 4-11. Vission 20/20 Configuration Screen - I/O Configuration (Page 8) .......................................... 4-15
FIgure 4-12. Compressor and Model Setup with Vission 20/20 ................................................................. 4-15
Figure 4-13. Coalescing Oil Return Line .................................................................................................... 4-16
Figure 4-14. Suction Equalizing Line and Valve ......................................................................................... 4-17
Figure 4-15. Dual Oil Filter Setup For Oil Filters With Manifold Heads........................................................ 4-18
Figure 5-1. Discharge Bleed Valve, Suction Equalizing Line and Valve ......................................................... 5-5
Figure 5-2. Oil Analysis Kit (VPN 3097A)..................................................................................................... 5-8
Figure 5-3. Oil Sampler Valve (VPN #3708A) For Gas Compression Applications ......................................... 5-8
Figure 5-4. Oil Sampling Valve (VPN #3709A) For Ammonia and Refrigerant Compressors ......................... 5-9
Figure 5-5. Operating the Oil Sampling Valve ............................................................................................. 5-9
Figure 5-6. Stages of the Oil Sample Taking Process ................................................................................. 5-10
Figure 5-7. Oil Strainer Drain Valve and Oil Separator Drain Valve ............................................................. 5-11
Figure 5-8. Suction Oil Charging Valve ..................................................................................................... 5-12
Figure 5-9. Filter Assembly and Oil Strainer Drain Valve (VPN 3111A Oil Filter Housing Shown) ................ 5-14
Figure 5-10. Filter Assembly (Vpn 3112A Oil Filter Housing Shown).......................................................... 5-15
Figure 5-11. Duplex Oil Filter Assembly (VPN 3110A Double Oil Filter Housing Shown) ............................ 5-16
Figure 5-12. Dual Oil Filter (3111A Oil Filter Housings Shown).................................................................. 5-18
Figure 5-13. Filter Assembly and Oil Strainer Drain Valve (VPN 3111A Oil Filter Housing Shown) .............. 5-19
Figure 5-14. Filter Assembly (VPN 3112A Oil Filter Housing Shown) ......................................................... 5-20
Figure 5-15. Oil Separators, Manhole Covers and Coalescing Filter Assemblies ......................................... 5-22
Figure 5-16. Heater Cartridges................................................................................................................. 5-23
Figure 5-17. Hub Distance (Axial Spacing)................................................................................................ 5-25
Figure 5-18. Angular Alignment and Parallel Offset .................................................................................. 5-26
Figure 5-19. Coupling Guard Assembly (VPN A27435C shown) ................................................................ 5-29
Figure 5-20. Compressor Replacement and Hardware Assembly (VSS 2401-3001 Shown)........................ 5-30
Figure 5-21. Bareshaft Compressor Lifting Points and Component Weights ............................................. 5-32
Figure 5-22. Bareshaft Compressor Assembly Center of Gravity (Models 97-127)..................................... 5-32
Figure 5-23. Bareshaft Compressor Assembly Center of Gravity (Models 291-2101)................................. 5-33
Figure 5-24. Bareshaft Compressor Center of Gravity - Discharge Manifold and Main Compressor Assembly
(Models 291-2101) .................................................................................................................................. 5-33
Figure 5-25. Bareshaft Compressor Assembly Center of Gravity (Models 2401-3001)............................... 5-34
Figure 5-26. Bareshaft Compressor Center of Gravity - Discharge Manifold and Main Compressor Assembly
(Models 2401-3001) ................................................................................................................................ 5-34
Figure 5-27. Bearing Axial Clearance Inspection ....................................................................................... 5-35
Figure 5-28. Bearing Radial Clearance Inspection ..................................................................................... 5-36
Figure 5-29. Gaterotor Bearing Clearance................................................................................................. 5-37
Figure 5-30. Gaterotor and Shelf Clearance .............................................................................................. 5-38

TOC - 8 VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Table of Contents
Table / Figure Page Number
Figure 5-31. Gaterotor and Shelf Clearance Measurement Steps............................................................... 5-38
Figure 5-32. Visual Inspection Between Gaterotor and Bushing................................................................ 5-39
Figure 5-33. Gaterotor Float Dial Location ................................................................................................ 5-39
Figure 5-34. Gaterotor Float..................................................................................................................... 5-40
Figure 5-35. Alignment of Gaterotor ........................................................................................................ 5-40
Figure 5-36. Location of Dial Indicator Magnetic Base............................................................................... 5-40
Figure 5-37. Placement of Dial Indicator................................................................................................... 5-41
Figure 5-38. Measuring Backlash.............................................................................................................. 5-41
Figure 5-39. Chipped Edge of Gaterotor ................................................................................................... 5-42
Figure 5-40. Gaterotor Assembly Removal and Tools................................................................................ 5-43
Figure 5-41. Gaterotor Assembly Removal ............................................................................................... 5-44
Figure 5-42. Gaterotor Assembly and Tools .............................................................................................. 5-45
Figure 5-43. Gaterotor and Shelf Clearance .............................................................................................. 5-45
Figure 5-44. Gaterotor Assembly Breakdown ........................................................................................... 5-46
Figure 5-45. Gaterotor Thrust Bearing...................................................................................................... 5-47
Figure 5-46. Gaterotor and Shelf Clearance .............................................................................................. 5-47
Figure 5-47. Gaterotor Assembly Removal ............................................................................................... 5-48
Figure 5-48. Gaterotor Assembly (VSM 97-127 Compressors ONLY) ......................................................... 5-49
Figure 5-49. Gaterotor and Shelf Clearance .............................................................................................. 5-50
Figure 5-50. Gaterotor Blade Assembly .................................................................................................... 5-50
Figure 5-51. Gaterotor Blade Installation.................................................................................................. 5-51
Figure 5-52. Gaterotor Thrust Bearing...................................................................................................... 5-51
Figure 5-53. Thrust Bearing Installation.................................................................................................... 5-51
Figure 5-54. Roller Bearing Assembly ....................................................................................................... 5-52
Figure 5-55. Gaterotor Support (VSM 97-127).......................................................................................... 5-53
Figure 5-56. Gaterotor Blade Installation.................................................................................................. 5-53
Figure 5-57. Gaterotor Thrust Bearing (VSM 97-127)................................................................................ 5-54
Figure 5-58. Shaft Seal Assembly.............................................................................................................. 5-55
Figure 5-59. Handling Seal Face with Care ................................................................................................ 5-55
Figure 5-60. Compressor Shaft Seal Assembly.......................................................................................... 5-56
Figure 5-61. Compressor Shaft Seal Installation: Tapered and Straight Shafts ........................................... 5-57
Figure 5-62. Shaft Seal Breakdown (28985Y & 28985YA).................................................................. 5-58,5-61
Figure 5-63. Shaft Seal Breakdown (28985W and 28985WA Only) .................................................. 5-59, 5-62
Figure 5-64. Shaft with Pin ....................................................................................................................... 5-60
Figure 5-65. Shaft Seal Housing................................................................................................................ 5-60
Figure 5-66. The Alignment of Compressor Shaft and Mating Ring ........................................................... 5-60
Figure 5-67. Actuator Installation Using Anti-Rotation Bolts..................................................................... 5-64
Figure 5-68. Command Shaft Assembly Replacement .............................................................................. 5-65
Figure 5-69. Danfoss ICF 20-40 Valve Station (Liquid Injection Control) .................................................... 5-66
Figure C-1. Compressor Bearing Vibration Measurement Location...............................................................C-1
Figure C-2. Main Rotor Cross-Section VSS/VSM Compressors ......................................................................C-2
Figure C-3. Gaterotor Cross-Section VSS/VSR/VSM Compressors.................................................................C-3

1 – 1
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
How To Use This Manual
This manual contains instructions for refrigeration com-
pressor units. It has been divided into eight sections and
Appendices:
Section 1: General Information
Section 2: Theory of Operation
Section 3: Installation
Section 4: Operation
Section 5: Maintenance & Service
Section 6: Troubleshooting
Section 7: Warranty and Parts
Section 8: Spare Parts List
Appendices
Appendix A: Torque Specications
Appendix B: Vilter Oil
Appendix C: Vibration Measurements - Single Screw
Compressor
Appendix D: Liquid Injection Valve Setup Instructions
and ICM/ICAD Motorized Valve Quick Start Guide
Appendix E: Liquid Injection Valve Station ICF 20-40
Installation Guide
Appendix F: Hand-Held Slide Valve Calibration Tool
Appendix G: Pre Start Up for Remote Oil Coolers
It is highly recommended that the manual be reviewed
prior to servicing system parts.
Figures and tables are included to illustrate key concepts.
Safety precautions are shown throughout the manual.
They are dened as the following:
NOTICE - Notice statements are shown when there are
important information that shall be followed. Not fol-
lowing such notices may result in void of warranty, seri-
ous nes, serious injury and/or death.
WARNING - Warning statements are shown when there
are hazardous situations, if not avoided, will result in se-
rious injury and/or death.
CAUTION - Caution statements are shown when there
are potentially hazardous situations, if not avoided, will
result in damage to equipment.
NOTE - Notes are shown when there are additional infor-
mation pertaining to the instructions explained.
Additional Important Notes
• Additional installation, operation and maintenance
instructions can be found in the Vission 20/20
manual (35391SC) or Compact Logix PLC Software
Manual (35391CM).
• Due to continuing changes and unit updates, always
refer to the website www.Vilter.com to make sure
you have the latest manual.
• Any suggestions of manual improvements can be
made to VilterTM Manufacturing at the contact infor-
mation on page iii.
Section 1 • General Information

1 – 2 VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Refrigeration Compressor Unit Model Designations
The compressor unit model designation can be found on the nameplate. For nameplate location, see Component
Identication section on page 1-4.
Section 1 • General Information
Separator Type
16= 16-inch diameter
20= 20-inch diameter
24= 24-inch diameter
30= 30-inch diameter
36= 36-inch diameter
42= 42-inch diameter
48= 48-inch diameter
54= 54-inch diameter
60= 60-inch diameter
*H=Horizontal
V=Vertical
SH=Special Horizontal
SV=Special Vertical
VSM - 301 - A - HP - E - 16H - N - PL - R - S - 3 - XCHR
Compressor Model
VSM/VSMC = VilterTM
Single Mini-Screw
VSS/VSSC= VilterTM Single
Screw
VRS= VilterTM Twin Screw
VSH /VSSH= VilterTM
Single Screw Heat Pump
Compressor Size
CFM- Nominal CFM
displacement of the
compressor at 3600
rpm
Application
HP=High Stage,
with Oil Pump
HN=High Stage,
No Oil Pump (SOI
= Suction Oil
Injection)
B = Booster
S = Swing
Driver
V =Variable
Frequency Drive
E =Electric Motor
Drive
G =Engine Drive
Economizer
N= No Economizer,
Economizer Ports
Plugged
E= Economizer
Connection, Ports Piped
to Single Flange
F= Economizer Flanges,
Flanged Port Covers
(piping by others)
Oil Filter
S=Single Filter
D=Dual Filter
Oil Cooler
PL=Plate
ST=Shell and Tube
Liquid Injection Cooling & Port:
LH = High Port
LM = Medium Port
LL = Low Port
L2 = High and Medium Ports
L1 = Medium and Low Ports
VP= V-Plus Pumped Liquid
R= Remote
Oil Cooling
Medium
R = Refrigerant
W =Water
G =Glycol
A=Air
Suction Connection
3, 4, 6, 8 = 3”, 4”, 6”, 8”
A = 10”
B = 12”
C = 14”
*
Custom Features
Blank X[letter(s)] = Special Feature(s):
No special
features
C=Cartridge-Style Reliefs L=Dual coolers (LI or PL)
E=Special Electrical Codes R=CRN Units
F=Fixed Slide S=Special Separator Features
H=Hazardous Area Req. V=Specic Vendor
**
***
Refrigerant Service
A = R-717 (Ammonia)
B = R-407A
C = R-744 (CO2)
E = R-134a
F=R-407F
H = R-404A
J = R-410A
K=R-407C
M = R-22
P = R-290 (Propane)
R = R-1270 (Propylene)
Z = R-507

1 – 3
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
System Unit Identication
To keep denitions of units simple and consistent, VilterTM has dened the following three:
• Bare Shaft Compressor
• Compressor Unit
• Package Unit
Bare Shaft Compressor
A bare shaft compressor is just the compressor with no coupling and motor nor foundation.
Compressor Unit
A compressor unit consists of the bare shaft compressor with the coupling, motor, oil separator, frame, micro-control-
ler system and oil system. A compressor unit typically a single screw compressor unit, is not mounted on a structural
steel base.
Package Unit
A package unit is a complete system mounted on a structural steel base with interconnecting piping.
Section 1 • General Information

1 – 4 VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
1 - Motor
2 - Motor Conduit Box
3 - Coupling and Guard
4 - Suction Oil Charging Valve
5 - Thermometer
6 - Suction Strainer
7 - Suction Check Valve
8 - Suction Stop Valve
9 - Compressor
10 - Discharge Pipe
11 - Vission 20/20 HMI
12 - Block & Bleed Assembly
13 - Oil Drain/Fill Valve
14 - Oil Pressure Regulator
15 - Oil Heater
16 - Frame
17a - Oil Filter, Single (Vertical)
17b - Oil Filter, Dual (Horizontal)
18 - Oil Pump Motor
19 - Oil Pump
20 - Oil Sight Glass
21 - Oil Pump Strainer
22 - Oil Pressure Relief Valve
23 - Oil Temperature Control Valve
(Oil Mixing Valve)
24 - Oil Cooler (Plate Heat Exchanger)
25 - Oil Separator
26 - Discharge Connection
27 - Coalescing Oil Return Line
28 - Heater Wiring Panel
29 - Economizer Connection Flange
30 - Nameplate
31 - Suction Equalizing Line
32 - Oil Separator Certication Plate
Compressor Unit Component Identication
Each refrigeration compressor unit may differ, but below are typical components that can be found on each unit.
Figure 1-1. Refrigeration Compressor Unit Components (1 of 3)
Section 1 • General Information
3
6
7 8
9
11
1317a24
1
25
12
10
1416182021 192223
4 5
15 15
2

1 – 5
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
26
21
29
28
2
Figure 1-1. Refrigeration Compressor Unit Components (2 of 3)
Section 1 • General Information
57
27
1
1918
30
30
32
17b
31

1 – 6 VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
33 - Temperature Element (Suction)
34 - Pressure Transducer (Filter Inlet)
35 - Pressure Transducer (Oil
Pressure)
36 - Pressure Transducer (Suction
Pressure)
37 - Pressure Transducer
(Discharge Pressure)
38 - Temperature Element (Oil
Separator)
39 - Temperature Element (Oil
Injection)
Compressor Unit Component Identication (Continued)
40 - Capacity Slide Valve Actuator
41 - Volume Slide Valve Actuator
42 - Temperature Element
(Discharge)
Figure 1-1. Refrigeration Compressor Unit Components (3 of 3)
Section 1 • General Information
42
33 34 35 36 37
38
39
41
40
36