background image

© 2021 Trane

COM-SVN01D-EN

Introduction

Read this manual thoroughly before operating or servicing
this unit.

Warnings, Cautions, and Notices

Safety advisories appear throughout this manual as
required. Your personal safety and the proper operation of
this machine depend upon the strict observance of these
precautions.

The three types of advisories are defined as follows:

WARNING

Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.

CAUTION

s

Indicates a potentially hazardous
situation which, if not avoided, could
result in minor or moderate injury. It
could also be used to alert against
unsafe practices.

NOTICE

Indicates a situation that could result in
equipment or property-damage only
accidents.

Important Environmental Concerns

Scientific research has shown that certain man-made
chemicals can affect the earth’s naturally occurring
stratospheric ozone layer when released to the
atmosphere. In particular, several of the identified
chemicals that may affect the ozone layer are refrigerants
that contain Chlorine, Fluorine and Carbon (CFCs) and
those containing Hydrogen, Chlorine, Fluorine and
Carbon (HCFCs). Not all refrigerants containing these
compounds have the same potential impact to the
environment. Trane advocates the responsible handling of
all refrigerants-including industry replacements for CFCs
and HCFCs such as saturated or unsaturated HFCs and
HCFCs.

Important Responsible Refrigerant
Practices

Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle
refrigerants must be certified according to local rules. For
the USA, the Federal Clean Air Act (Section 608) sets forth
the requirements for handling, reclaiming, recovering and
recycling of certain refrigerants and the equipment that is
used in these service procedures. In addition, some states
or municipalities may have additional requirements that
must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.

WARNING

Proper Field Wiring and Grounding
Required!

Failure to follow code could result in death or serious
injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes.

WARNING

Personal Protective Equipment (PPE)
Required!

Failure to wear proper PPE for the job being undertaken
could result in death or serious injury. Technicians, in
order to protect themselves from potential electrical,
mechanical, and chemical hazards, MUST follow
precautions in this manual and on the tags, stickers,
and labels, as well as the instructions below:

Before installing/servicing this unit, technicians
MUST put on all PPE required for the work being
undertaken (Examples; cut resistant gloves/sleeves,
butyl gloves, safety glasses, hard hat/bump cap, fall
protection, electrical PPE and arc flash clothing).
ALWAYS refer to appropriate Safety Data Sheets
(SDS) and OSHA guidelines for proper PPE.

When working with or around hazardous chemicals,
ALWAYS refer to the appropriate SDS and OSHA/GHS
(Global Harmonized System of Classification and
Labeling of Chemicals) guidelines for information on
allowable personal exposure levels, proper
respiratory protection and handling instructions.

If there is a risk of energized electrical contact, arc, or
flash, technicians MUST put on all PPE in accordance
with OSHA, NFPA 70E, or other country-specific
requirements for arc flash protection, PRIOR to
servicing the unit. NEVER PERFORM ANY
SWITCHING, DISCONNECTING, OR VOLTAGE
TESTING WITHOUT PROPER ELECTRICAL PPE AND
ARC FLASH CLOTHING. ENSURE ELECTRICAL
METERS AND EQUIPMENT ARE PROPERLY RATED
FOR INTENDED VOLTAGE.

Summary of Contents for CSHD

Page 1: ...on starting up and servicing of heating ventilating and air conditioning equipment can be hazardous and requires specific knowledge and training Improperly installed adjusted or altered equipment by a...

Page 2: ...nt that is used in these service procedures In addition some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants Know the...

Page 3: ...gases and extremely corrosive acids WARNING Explosion Hazard Failure to follow these instructions could result in death or serious injury or equipment or property only damage Use only dry nitrogen wit...

Page 4: ...ed in this document are the trademarks of their respective owners Revision History Updated Model Number Descriptions chapter Updated Torque values table in General Information chapter Updated Oil chan...

Page 5: ...Inspections 10 Repair Recommendations 11 Mechanical Failure 11 Electrical Failure 12 Two Types of Motor Failures 12 Removal and Installation 13 Removal 13 Compressor Replacement Tandem and Trio Compr...

Page 6: ...tenance IOM manuals The following table lists these IOMs by unit type Unit Type IOM a a Installation Operation and Maintenance IOM manuals listed here are current as of Februaryl 2015 Check e Library...

Page 7: ...76 176 MBtu h CSHN 184 184 MBtu h CSHN1 240 240 MBtu h CSHN 250 250 MBtu h CSHN1 315 315 MBtu h CSHN 374 374 MBtu h CSHN CSHL Digit 8 Voltage J 200 230 60 3 K 460 60 3 380 415 50 3 D 575 60 3 X 380 60...

Page 8: ...it absorbs moistureveryreadily Therefore itisimportanttoproperly handle the oil POE Oil handling guidelines Always use the smallest container size required for the job requirements Always leave the o...

Page 9: ...transported in the upside position droppedortippedovercouldresultininternaldamageto the compressor and it is recommended that the compressor not be put into service Damage to compressor or packaging...

Page 10: ...part number Compressor is the correct voltage Compressor ship with items Restrictors for use with tandem and trio compressors Oil equalizer Teflon gaskets WARNING R 410A Refrigerant under Higher Press...

Page 11: ...em or trio assemblies the suction and discharge lines must NOT be modified except for the use of slip joint couplings Other modification may cause oil return issues and lead to compressor failure Cut...

Page 12: ...as a mechanical failure Severe If oil test kit is positive with strong pungent odor and dark oil drain and replace oil in all of the non failed compressors Reuse the compressor mounting isolators or...

Page 13: ...service technician to perform a safe and successful compressor replacement Removal WARNING Pressurized Burning Fluid Failure to follow these instructions could result in death or serious injury Befor...

Page 14: ...ndem or trio set 1 Only replace the failed compressor 2 On tandem or trio assemblies the suction and discharge lines must not be modified except for the use of slip joint couplings Other modifications...

Page 15: ...m due to POE oil Remove the rubber plugs only when ready to install the compressor Plug other compressor on tandem or trio compressors Before removing the oil equalizer connection cap place a can pan...

Page 16: ...osive and could lead to long term problems and equipment damage if not properly removed Tandem two compressors and trio combinations three compressors with uneven compressor combinations requires the...

Page 17: ...g diagram Ensure that the compressor model terminals are installed on the correct terminals see Figure 12 Proper torque for the terminal screws is 25 in lb Before starting the compressor check the ele...

Page 18: ...pressurizing the system use an R 410A leak detection device to detect and locate leaks Vacuum Testing and Evacuation Use the procedure as described in the unit Installation Operation and Maintenance...

Page 19: ...tion and discharge service valves close them during the charging procedure Water chiller units Always operate the chilled water pumps while charging the unit to prevent freezing the evaporator Verific...

Page 20: ...operating Do not overcharge the unit Recommended system full load superheats unless specified differently in the unit Installation Operation andMaintenancemanual see LiteratureReferenced p 6 is 16 F 2...

Page 21: ...mpressor superheat subcooling oil sump superheat voltage and amperage Check all of the following on a regular basis System operating conditions System refrigerant charge level Oil levels and oil color...

Page 22: ...g valve may be stuck and not switched properly bypassing from the high side to the low side of the system this situation is indicated by an extremely warm suction inlet to the compressor Model CSHN374...

Page 23: ...lywiredintothesystem safety circuit If the motor is believed to be incorrectly phased change two of the three wires PTC Overheat motor over temperature over current Compressor motor drawing too much c...

Page 24: ...PTC open replace compressor Resistance 0 ohms PTC shorted replace compressor Resistance 2750 ohm Wait until the motor has cooled down and resistance is less than 2750 ohms reconnect and try to reset...

Page 25: ......

Page 26: ......

Page 27: ......

Page 28: ...are committed to using environmentally conscious print practices Trane by Trane Technologies NYSE TT a global climate innovator creates comfortable energy efficient indoor environments for commercial...

Reviews: