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© 2020 Trane

 SS-SVX004C-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.

Содержание TR-OHS RCU Series

Страница 1: ...the equipment The installation starting up and servicing of heating ventilating and air conditioning equipment can be hazardous and requires specific knowledge and training Improperly installed adjus...

Страница 2: ...quipment 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 Kno...

Страница 3: ...ede these policies Non Trane personnel should always follow local regulations Introduction SS SVX004C EN 3 Copyright This document and the information in it are the property of Trane and may not be us...

Страница 4: ...Procedures 16 Refrigerant Characteristics 19 Settings and Adjustments 20 High Low Pressure Limit Switches 20 Head Pressure Controls 20 Hot Gas Bypass 20 Commissioning and Decommissioning 21 Operation...

Страница 5: ...10 11 Unit RCU Remote Condensing Unit Digit 12 Outdoor Indoor O Outdoor Unit I Indoor Unit About Digits Model numbers are comprised of digits Each digit or set of digits defines the product model Exam...

Страница 6: ...electric box on the RCU O is weatherproof There are several cabinet sizes based on the capacity of the unit Refer to the installation drawing supplied with the unit for the layout and dimensions of th...

Страница 7: ...r located in the electric box The 012 040 model RCU I use a direct drive blower The 042 120 RCU I units have a belt driven blower with separate drive motor Electric Box RCU electrical components are p...

Страница 8: ...provided as standard on RCU O units and as an option on RCU I units A service disconnect switch electrically isolates the unit during routine maintenance The handle of the switch may be locked in the...

Страница 9: ...ly lift unit in a LEVEL position could result in unit dropping and possibly crushing operator technician which could result in death or serious injury and equipment or property only damage Test lift u...

Страница 10: ...ing for ducted systems Refer to the below figure Notes Do not install the A C system directly above electronic equipment that may hinder serviceability Equipment must be level to operate properly Figu...

Страница 11: ...ill be used if the volume of the piping is too large Note The size of the equipment pipe connections does not indicate the size of the refrigerant lines to be used In cases where the pipe size doesn t...

Страница 12: ...of 30 equivalent ft for longer rises individual calculations must be made Sizes assume the use of single risers double risers may be necessary Table 2 Recommended liquid line sizes Recommended Liquid...

Страница 13: ...se and frequency information specified on the system nameplate The supply voltage measured at the unit must be within 10 of the voltage specified on the nameplate refer to the below figure The namepla...

Страница 14: ...the compressor To correct this problem exchange any two of the incoming main power wires at the main power circuit breaker Do not rewire the unit s individual components Electric Box Layout The elect...

Страница 15: ...rform a dry nitrogen leak detection test on the system Using dry nitrogen only pressurize the system to 150 psig Ensure all service and solenoid valves are energized open and that no part of the syste...

Страница 16: ...Failure to follow instructions below could result in death or serious injury Do not work in confined spaces where refrigerant or other hazardous toxic or flammable gas may be leaking Refrigerant or ot...

Страница 17: ...e the cylinder is emptied Initial System Charge Introducing the Refrigerant Charge Follow the steps below to charge systems with R407C refrigerant The initial charge will be performed by introducing l...

Страница 18: ...f refrigerant charge This can be done by using the system controller to enable a call for dehumidification lower the humidity setpoint This process may need to be repeated several times After cycling...

Страница 19: ...Pressure psig R407C 70 55 85 Switch State Opens Closes Low Pressure Switch psig R407C 10 32 High Pressure Switch psig R407C 410 Manual Reset Saturated Refrigerant Pressure Table The refrigerant vapor...

Страница 20: ...liquid flow from the condensing unit to the receiver When using this method of head pressure regulation there must be enough refrigerant in the system to ensure adequate charge at the lowest expected...

Страница 21: ...pressure gas 3 The refrigerant then flows to the condensing unit coil The high temperature high pressure gas from the compressor is cooled and condensed by the flow of air through the condensing unit...

Страница 22: ...he following recommended guidelines When transferring refrigerant into cylinders ensure that only appropriate refrigerant recovery cylinders are employed Ensure that the correct number of cylinders fo...

Страница 23: ...care to avoid accidents and ensure proper operation General Maintenance access to the remote condensing unit is through the removable panel on top of the unit Examine the areas around the air inlet an...

Страница 24: ...overload and re set circuit breaker s or motor starter protector s Condensing Unit Head Pressure Too High Non condensable gas or air in system Recover system evacuate per Preparing System for Charging...

Страница 25: ...o the unit Check fan motor starter protector contactor fan cycling switch or fan speed controller Suction Pressure too Low Expansion valve not opening fully indicated by abnormally cold suction line O...

Страница 26: ...ine whether it is an electrical or a mechanical failure An electrical failure will be indicated by the distinct pungent odor once the system has been opened If a burnout has occurred the oil will be b...

Страница 27: ...Cleanup Procedure WARNING Hazardous Voltage Disconnect all electric power including remote disconnects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadverte...

Страница 28: ...r opening the sheave one half turn to decrease speed 7 Replace the sheave key and tighten set screw 8 Proper belt tension is achieved when the belt has a deflection of 1 2 inch per foot of span betwee...

Страница 29: ...Model Number Sales Order Number Item Number Unit Serial Number Description of Problem Obtaining Warranty Parts A support technician will provide troubleshooting assistance over the telephone If it can...

Страница 30: ...gerant charge bubbles in sight glass 2 Check suction and discharge pressure 3 Ensure refrigerant lines are secured 4 Tighten electrical connections 5 Ensure motor mount is secured 6 Clean unit as nece...

Страница 31: ...tolerances Main power wiring connections to the equipment including earth ground have been properly installed Customer supplied main power circuit breaker HACR type or fuses have proper ratings for e...

Страница 32: ...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...

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