INSTRUCTION MANUAL

FOR

PISTON COMPRESSOR

CMO 24 CMO 26 CMO 28 TCMO 28 MK2

00.12

0171-370-EN 1

Specifications forCMO 24-26-28 Mk2 and TCMO 28 Mk2

The CMO/TCMO-type piston compressor canbe fitted with a range of equipment, depend-ing on the function and requirements it iscalled on to meet.

Some of these variants are discussed in this

instruction manual, even if they are not fea-tured on your particular unit.

The variants featured on the unit are markedwith an x in the following diagram, with theserial number stated below.

Control

Compressor

Refrigerant

Serial number

Compressor type

UNISAB II Control- and regulating system

cooling

Drive type

Explosion-proof electrical design

Additional suction filter

Oil return on parallel systems

Compressor used for air conditioning

Designation

Capacity regulation

Analogous control system

Water cooled top and side covers

Thermopump

Air-cooled top covers and water-cooled side covers

Air-cooled top- and side covers + oil-cooling

Air-cooled top- and side covers

Coupling

V-belts

With capacity regulation system

Without capacity regulation system

Oil separatorWith solenoid valve controlled oil return

With float valve controlled oil return

Intermediatecooling system

With internal intermediate cooling system

With external intermediate cooling system

R717 R22 R134a R404A R507 _____

0171-500-EN

00.07

2 0171-370-EN

Preface

The aim of this instruction manual is toprovide the operators with a thoroughknowledge of the compressor and the unitand at the same time provide informationabout:

S the function and maintenance of theindividual components;

S service schedules;

S procedure for dismantling andreassembling of the compressor.

This instruction manual draws attention totypical errors which may occur during opera-tions. The manual states causes of error andexplains what should be done to rectify theerrors in question.

It is imperative that the operators familiarizethemselves thoroughly with the contents of

this instruction manual to ensure a safe,reliable and efficient operation of the productas YORK Refrigeration is unable to provide aguarantee against damage of the productoccurring during the warranty period as aresult of incorrect operation.

Dismantling and assembly of compressorsand components should only be carried outby authorized personnel to preventaccidents.

The contents of this instruction manual mustnot be copied or passed on to anyunauthorized person without YORKRefrigerations permission.

YORK Refrigerations General Conditions forthe Supply of Components and Spare Partswill apply.

In the space below you can enter the name and address of your local YORK RefrigerationRepresentative:

0171-370-EN 3

Contents

Specifications for CMO 24-26-28 Mk2 and TCMO 28 Mk2 1. . . . . . . . . . . . . . . . . . . . . . . . .

Preface 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Description of compressor CMO 24-26-28 & TCMO 28 Mk 2 6. . . . . . . . . . . . . . . . . . . . . . .

Safety Precautions 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Reciprocating compressors 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .General safety instructions and considerations 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Handling of the compressor, areas of application,safety equipment and symbols, safety at servicing 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Safety equipment 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Safety symbols 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .First Aid for accidents with Ammonia 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .First aid for accidents with HFC/HCFC 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Protecting the operator as well as the environment 18. . . . . . . . . . . . . . . . . . . . . . . . . . . .Sound data for reciprocating and screw compressor units -- all types of compressors21

Vibration data for compressors - all types 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Compressor data for reciprocating compressor 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operating limits 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .R717 - Operating limits single stage compressorsCMO, SMC 100 S-L, SMC 180 27. .R717 - Operating limits single stage compressors SMC 100 E 28. . . . . . . . . . . . . . . . . . .R717 - Operating limits two-stage compressors TCMO TSMC 100 S-L-E, TSMC 18029R22 - Operating limits single stagecompressors CMO,SMC 100 S-L, SMC 180 30. . . .R22 - Operating limits two-stage compressorsTCMO, TSMC 100 S-L, TSMC 180 31. .R134a - Operating limits single stage compressors CMO SMC 100 S-L 32. . . . . . . . . . .R134a - Operating limits two-stage compressors TCMO TSMC 100 S-L 33. . . . . . . . . .R404A - Operating limits single stage compressors CMO, SMC 100 S-L 34. . . . . . . . . .R404A - Operating limits two-stage compressors TCMO, TSMC 100 S-L 35. . . . . . . . . .R507 - Operating limits single stage compressors CMO, SMC 100 S-L 36. . . . . . . . . . .R507 - Operating limits two-stage compressors TCMO, TSMC 100 S-L 37. . . . . . . . . . .

General operating instructions for CMO/TCMO, SMC/TSMC piston compressors 39. . . . .Starting up compressor and plant 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Stopping and starting-up compressor during a short period of standstill 40. . . . . . . . . . .Stopping plant for brief periods (until 2-3 days) 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Stopping plant for lengthy periods (more than 2-3 days) 41. . . . . . . . . . . . . . . . . . . . . . . .Automatic plants 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pressure testing refrigeration plant 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pumping down refrigeration plant 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operating log 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Servicing the reciprocating compressor 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pressure drop test: 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Removing refrigerant from compressor 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lubricating oil 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Lubricating oil requirements 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 0171-370-EN

General rules for use of lubricating oil in refrigeration compressors 50. . . . . . . . . . . . . . .Instructions for choosing lubricating oil for refrigeration compressors 50. . . . . . . . . . . . .Charging refrigeration compressor with lubricating oil 50. . . . . . . . . . . . . . . . . . . . . . . . . .Changing oil in refrigeration compressor 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Charging the compressor with oil 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Assessing the oil 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Visual assessment 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Analytical evaluation 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Procedure 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .The analysis 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pressure and temperature settings 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Expected discharge gas temperatures 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Servicing the refrigeration plant 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance of reciprocating compressor 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pump-down 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1. If the compressor is operational 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2. If the compressor is inoperative 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .