Trane YSC060ED, YSC120ED Installation, Operation And Maintenance Manual

Installation, Operation, and Maintenance

Packaged Rooftop Air Conditioners Precedent™ — Gas/Electric

5–10Tons–50Hz

Model Numbers

Only qualified personnel should install and service 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, adjusted or altered equipment by an unqualified person could result in death or serious injury.When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.

September 2012 RT-SVX38B-EN

YSC060ED - YSC120ED

SAFETY WARNING

Warnings, Cautions and Notices

Warnings, Cautions and Notices. Note that warnings,

cautions and notices appear at appropriate intervals throughout this manual. Warnings are provide to alert installing contractors to potential hazards that could result in death or personal injury. Cautions are designed to alert personnel to hazardous situations that could result in personal injury, while notices indicate a situation that could result in equipment or property-damage-only accidents.

Your personal safety and the proper operation of this

machine depend upon the strict observance of these precautions.

Read this manual thoroughly before operating or servicing this unit.

ATTENTION: Warnings, Cautions and Notices appear at

appropriate sections throughout this literature. Read these carefully:

WARNING

CAUTIONs

NOTICE:

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

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.

Indicates a situationthat could result in equipment or property-damage only

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 such as HCFCs and HFCs.

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.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!

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. Failure to follow code could result in death or serious injury.

WARNING

Personal Protective Equipment (PPE) Required!

Installing/servicing this unit could result in exposure to electrical, mechanical and chemical hazards.

• Before installing/servicing this unit, technicians MUST put on all Personal Protective Equipment (PPE) recommended for the work being undertaken.

ALWAYS refer to appropriateMSDS sheets and OSHA

guidelines for proper PPE.

• When working with or around hazardous chemicals,

ALWAYS refer to the appropriate MSDS sheets and

OSHA guidelines for information on allowable personal exposure levels, proper respiratory protection and handling recommendations.

• If there is a risk of arc or flash, technicians MUST put on all Personal Protective Equipment (PPE) in accordance with NFPA 70E or other country-specific requirements for arc flash protection, PRIOR to servicing the unit.

Failure to follow recommendations could result in death or serious injury.

Revision Summary

RT-SVX38B-EN (10 September 2012)

• MERV 8 filter with filter removal tool

• Stainless steel drain pan, condensate overflow switch

• Updated Model Number Description, Maintenance, Troubleshooting

Table of Contents

Model Number Description ............... 4

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

Unit Dimensions ........................ 10

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

Pre-Installation ....................... 16

Foundation .......................... 17

Ductwork ............................ 18

Roof Curb ........................... 18

General Unit Requirements ............ 20

Horizontal Discharge Conversion (5 Ton Units)

TCO-1 Instructions .................... 21

Horizontal Discharge Conversion (6 Through 10 Ton Units)

TCO1 Instructions ..................... 22

Requirements for Gas Heat ............ 22

Condensate Drain Configuration ........ 22

Filter Installation ...................... 23

Field Installed Power Wiring ........... 23

Main Unit Power ..................... 23

Space Temperature Averaging (ReliaTel™ Only)

.................................. 25

........................ 21

Zone Temperature Sensor (ZTS) Service Indicator

.................................40

Clogged Filter Switch ..................40

Fan Failure Switch .....................40

Condensate Overflow Switch ...........40

Unit Economizer Control (ECA) Troubleshooting

...................................41

Resetting Cooling and Ignition Lockouts ..42

Unit Wiring Diagrams Numbers ...........43

Limited Warranty ........................44

Combination Gas Electric Air Conditioner .44

Pre-Start ............................... 29

Voltage Imbalance .................... 29

Electrical Phasing (Three Phase Motors) .29

Test Modes .......................... 31

Unit Start-Up ........................... 32

Verifying Proper Air Flow .............. 32

Economizer Start-Up .................. 32

Compressor Start-Up ................. 33

Final System Setup ................... 33

Maintenance ........................... 34

Fan Belt Adjustment - Belt Drive Units ... 34

Monthly Maintenance ................. 34

Annual Maintenance .................. 36

Final Process ......................... 37

Trouble Shooting ....................... 38

ReliaTel™ Control .................... 38

System Status Checkout Procedure ..... 38

RT-SVX38B-EN 3

Model Number Description

YSC 036 E 3 R Z B ** 123 456 7 8 9 10 11 1213

Digit 1 - Unit Type

Y DX Cooling, Gas Heat

Digit2-Efficiency

S Standard Efficiency H High Efficiency

Digit 3 - Airflow

C Convertible

Digit 4,5,6 - Nominal Gross Cooling Capacity (MBh)

036 3Ton 048 4Ton 060 5Ton 072 6Ton 090 7½Ton, Single Compressor 092 7½Ton, Dual Compressor 102 8½ Ton 120 10 Ton

Digit 7 - Major Design Sequence

E R-410A Refrigerant F MicrochannelType Condenser

Coils

Digit 8 - Voltage Selection

1 208/230/60/1 3 208-230/60/3 4 460/60/3

W 575/60/3

Digit 9 - Unit Controls

E Electromechanical R ReliaTel™ Microprocessor

Digit 10 - Heating Capacity

L Low Heat M Medium Heat H High Heat X Low Heat, Stainless Steel Heat

Exchanger

Y Medium Heat, Stainless Steel Heat

Exchanger

Z High Heat, Stainless Steel Heat

Exchanger

Digit 11 - Minor Design Sequence

A First Sequence B Second Sequence

Digit 12,13 - Service Sequence

** Factory Assigned

Digit 14 - Fresh Air Selection

0 No Fresh Air A Manual Outside Air Damper 0-50% B Motorized Outside Air Damper

C Economizer, Dry Bulb 0-100%

D Economizer, Dry Bulb 0-100%

E Economizer, Reference Enthalpy

F Economizer, Reference Enthalpy

0-50%

without Barometric Relief

with Barometric Relief

0-100% without Barometric Relief

0-100% with Barometric Relief

3,7

G Economizer, Comparative

Enthalpy 0-100% without Barometric Relief

3,7

H Economizer, Comparative

Enthalpy 0-100% with Barometric

3,7

Relief

Digit 15 - Supply Fan/Drive Type/ Motor

0 Standard Drive 1 Oversized Motor 2 Optional Belt Drive Motor 6 Single Zone VAV 7 Multi-Speed Indoor Fan

Digit 16 - Hinged Service

Access/Filters

0 Standard Panels/Standard Filters

A Hinged Access Panels/Standard

Filters B Standard Panels/2” MERV 8 Filters C Hinged Access Panels/2” MERV 8

Filters D Standard Panels/2” MERV 13 Filters E Hinged Access Panels/2” MERV 13

Filters

Digit 17 - Condenser Coil Protection

0 Standard Coil 1 Standard Coil with Hail Guard 2 Black Epoxy Pre-Coated Condenser

Coil 3 Black Epoxy Pre-Coated

Condenser Coil with Hail Guard

4 CompleteCoat™ Condenser Coil 5 CompleteCoat™ Condenser Coil

with Hail Guard

Digit 18 - Through the Base Provisions

0 NoThrough-the-Base Provisions

A Through-the-Base Electric

B Through-the-Base Gas Piping C Through-the-Base Electric and Gas

Piping

Digit 19 - Disconnect/Circuit Breaker (three-phase only)

0 No Disconnect/No Circuit Breaker 1 Unit Mounted Non-Fused

Disconnect 2 Unit Mounted Circuit Breaker

Digit 20 - Convenience Outlet

0 No Convenience Outlet

A Unpowered Convenience Outlet B Powered Convenience Outlet

(three-phase only)

Digit 21 - Communications

Sensor

DCV

Options

0 No Communications Interface 1 Trane Communications Interface 2 LonTalk® Communications Interface 3 Novar 2024 Controls 4 Novar 3051 Controls without Zone

5 Novar 3051Controls Interface with

6 BACnet™ Communications Interface

Digit 22 - Refrigeration System Option

0 Standard Refrigeration System B Dehumidification Option

Digit 23 - Refrigeration Controls

Note: Applicable to Digit7=E,F

0 No Refrigeration Control 1 Frostat 2 Crankcase Heater 3 Frostat

11 ,29

and Crankcase Heater

Digit 24 - Smoke Detector

0 No Smoke Detector A Return Air Smoke Detector B Supply Air Smoke Detector C Supply and Return Air Smoke

Detectors

12,13

D Plenum Smoke Detector

Digit 25 - System Monitoring Controls

0 No Monitoring Control 1 Clogged Filter Switch 2 Fan Failure Switch 3 Discharge Air Sensing Tube 4 Clogged Filter Switch and Fan

Failure Switch

5 Clogged Filter Switch and Discharge

Air SensingTube

6 Fan Failure Switch and Discharge Air

SensingTube

7 Clogged Filter Switch, Fan Failure

Switch and Discharge Air SensingTube

8 Novar Return Air Sensor

(NOVAR 2024)

9 Novar ZoneTemp Sensor

(NOVAR 3051)

A Condensate Drain Pan Overflow

Switch

B Clogged Filter Switch14and

Condensate Drain Pan Overflow Switch

C Fan Failure Switch14and Condensate

Drain Pan Overflow Switch

D Discharge Air Sensing14and

Condensate Drain Pan Overflow Switch

15,30

19,30

22,23

12,13

4 RT-SVX38B-EN

Model Number Description

E Clogged Filter Switch Switch14and Condensate Drain Pan

Overflow Switch

F Clogged Filter Switch14, Discharge

Air SensingTube14and Condensate Drain Pan Overflow Switch

G Fan Failure Switch, Discharge Air

SensingTube14and Condensate Drain Pan Overflow Switch

H Clogged Filter Switch14, Fan Failure

Switch14, Discharge Air Sensing and Condensate Drain Pan Overflow

Switch

, Fan Failure

Digit 26 - System Monitoring Controls

0 No Monitoring Controls A Demand Control Ventilation

31,32

(CO2)

Digit 27 - Unit Hardware Enhancements

0 No Enhancements 1 Stainless Steel Drain Pan

Model Number Notes

1. Available on 3-5 ton models.

2. Standard on 4-5Ton E3,4,W and 6-10Ton Heat Pumps and all High Efficiency models.

3. Not available with electromechanical controls.

4. Manual outside air damper will ship factory supplied within the unit, but must be field installed.

5. High pressure controlis standard on all units.

6. On 3-5 ton, multispeed direct drive is standard on single phase and 15 SEER. On 6-10 ton, multispeed direct drive is standard on all 10 ton and 7.5-8.5 ton high efficiency. Belt drive is standard on all other units.

Digit 15 = 0

Standard Efficiency 1 Phase = High Efficiency Multispeed Direct Drive Motor 3 Phase (3-8½ Ton) = Belt Drive 3 Phase (10 T on) = Ultra High Efficiency Direct Drive Plenum Fan High Efficiency 1 Phase = High Efficiency Multispeed Direct Drive Motor 3 Phase (3-5 ton) = High Efficiency Multispeed Direct Drive Motor 3 Phase (3-5 ton w/Dehumidification) = Belt Drive Motor 3 Phase (7½-10 ton) = Ultra High Efficiency Direct Drive Plenum Fan

7. Economizer with Barometric Relief is for downflow configured units only. Order Economizer without Barometric Relief for

horizontal configuration. Barometric Relief for horizontal configured units must beordered as field installed accessory.

8. Through the base electric required when ordering disconnect/circuit breaker options.

9. Requires use of Disconnect or Circuit Breaker.

Not Available

Standard Efficiency 10 Ton w/575V High Efficiency 3-5 ton w/Standard Indoor Motor w/460V

10. Standard metering devices are

TXVs.

11. Frostat cannot be field installedin electro-mechanical units.

12. The return air smoke detector may not fitup or workproperly on the Precedent units when used in conjunction with 3rd party accessories such as bolt on heat wheels, economizers and power exhaust. Do not order the return air smoke detectors when using this type of accessory.

13. Return Air Smoke Detector cannot be ordered with Novar Controls.

14. These options are standard when ordering Novar Controls.

15. This option is used when ordering Novar Controls.

16. Includes gas piping and shutoff (field assembly required).

17. Not available with high temperature duct sensor accessory.

18. Digit 15 = 2

Standard Efficiency 1 Phase = Not Available 3 Phase = Not Available High Efficiency 1 Phase = Not Available 3 Phase (3-5 ton) = May be Ordered 3 Phase (3-5 ton w/Dehumidification) = Not Available 3 Phase (6-10 ton) = Not Available

19. Novar Sensor utilized with Digit 21 = (4)Novar 3051 Controls without Zone Sensor.

20. Available for 10 ton standard efficiency models only.

21. Available for 3, 4, 5, 6, 7½, 8½ ton standard/high efficiency models only.

22. Requires selection of 2” Pleated Filters (option B or C) for Digit 16.

23. Not available on 6 ton units and all single phase or standard efficiency.

24. Standard onYSC 6, 7½ (single and dual systems), 8½, 10 ton standard efficiency models and

YHC 4, 5, 6, 7½ ton highefficiency

models (except for dehumidification models).

25. Epoxy coil and epoxy with hailguard options are not available for units with microchannel condenser coil.

26. Single ZoneVAV is only available on 7.5-10 ton high efficiency and 10 ton standard efficiency products with ReliaTel™ controls.

27. Multi-speed indoor fan available only on 7.5 & 8.5 ton high efficiency, and 10 ton products with ReliaTel™ controls.

28. Motorized Outside Air Damper is not available on Multi-Speed or SZVAV (Single Zone Variable Air

Volume) products.

29. Frostat standard on Multi-Speed and SZVAV (Single ZoneVariable

Air Volume) products.

30. Novar is not available with SZVAV products.

31. Demand Control Ventilation not available with electromechanical controls.

32. Demand Control Ventilation Option includes wiring only.The C0

sensor is afield-installed only

option.

RT-SVX38B-EN 5

General Information

Unit Inspection

As soon as the unit arrives at the job site

• Verify that the nameplate data matches the data on the sales order and bill of lading (including electrical data).

• Verify that the power supply complies with the unit nameplate specifications.

• Visually inspect the exterior of the unit, including the roof, for signs of shipping damage.

If the job site inspection of the unit reveals damage or material shortages, file a claim with the carrier immediately.Specify the typeand extent ofthe damage on the “bill of lading” before signing.

• Visually inspect the internal components for shipping damage as soon as possible after delivery and before it is stored. Do not walk on the sheet metal base pans.

• If concealed damage is discovered, notify the carrier’s terminal of damage immediately by phone and by mail. Concealed damage must be reported within 15 days.

• Request an immediate joint inspection of the damage by the carrier and the consignee. Do not remove damaged material from the receiving location.Take photos of the damage, if possible.The owner must provide reasonable evidence that the damage did not occur after delivery.

• Notify the appropriate sales representative before installing or repairing a damaged unit.

Compressor Nameplate

The nameplate forthe compressors are located onthe side

of the compressor.

Unit Description

Before shipment, each unit is leak tested, dehydrated, charged with refrigerant and compressor oil, and run tested for proper control operation.

The condenser coilsare either aluminum fin, mechanically

bonded to copper tubing or all aluminum microchannel.

Direct-drive, vertical discharge condenser fans are provided with built-in thermal overload protection.

There are two control systems offered for these units.The

electromechanical control option uses a thermostat to perform unit functions.The ReliaTel™ Control Module is a microelectronic control system that is referred to as “Refrigeration Module” (RTRM). The acronym RTRM is used extensively throughout this document when referring to the control system network.

These modules through Proportional/Integral control

algorithms perform specific unit functions that governs unit operation inresponse to; zone temperature, supply air temperature, and/or humidity conditions depending on the application.The stages of capacity control for these units are achieved by starting and stopping the compressors.

The RTRM is mounted in the control panel and is factory

wired to the respective internal components.The RTRM receives and interprets information from other unit modules, sensors, remote panels, and customer binary contacts to satisfy the applicable request for cooling.

Storage

Take precautions to prevent condensate from forming

inside the unit’s electrical compartments and motors if:

1. The unit is stored before it is installed; or,

2. The unit is set on the roof curb, and temporary heat is provided in the building. Isolate all side panel service entrances and base pan openings (e.g., conduit holes, Supply Air and Return Air openings, and flue openings) from the ambient air until the unit is ready for start-up.

Note: Do not use the unit’s heater for temporary heat

without first completing the start-up procedure detailed under “Unit Start-Up,” p. 32.

The manufacturer will not assume any responsibility for

equipment damage resulting from condensate accumulation on the unit’s electrical and/or mechanical components.

Unit Nameplate

A Mylar unit nameplate is located on the unit’s corner support next to the filter access panel. It includes the unit model number, serial number, electrical characteristics, refrigerant charge, as well as other pertinent unit data.

Economizer Control Actuator (Optional)

ReliaTel™ Control

The ECA monitors the mixed air temperature, return air

temperature, minimum position setpoint (local or remote), power exhaust setpoint, CO ambient dry bulb/enthalpy sensor or comparative humidity (return air humidity against ambient humidity) sensors, if selected, to control dampers to an accuracy of +/- 5% of stroke.The actuator is spring returned to the closed position any time that power is lost to the unit. It is capable of delivering up to 25 inch pounds of torque and is powered by 24 VAC.

RTCI - ReliaTel™ Trane Communication Interface (Optional)

This module is used when the application calls for an

ICSTM building management type control system. It allows the control and monitoring of the system through an ICS panel.The module can be ordered from the factory or ordered as a kit to be field installed. Follow the installation instruction that ships with each kit when field installation is necessary.

setpoint, CO2, and

6 RT-SVX38B-EN

General Information

RLCI - ReliaTel™ LonTalk® Communication Interface (Optional)

This module is used when the application calls for an

ICSTM building management type control system that is LonTalk. Itallows the control and monitoringof the system through an ICS panel.The module can be ordered from the factory or ordered as a kit to be field installed. Follow the installation instruction that ships with each kit when field installation is necessary.

RBCI - ReliaTel™ BACnet Communications Interface (Optional)

This module is used when the application calls for anopen

BACnet protocol. It allows the control and monitoring of the system through an ICS panel.The module can be ordered from the factory or as a kit to be field installed. Follow the installation instructions that ships with each kit when field installation is necessary.

RTOM - ReliaTel™ Options Module (Optional)

The RTOMmonitors the supply fan proving, cloggedfilter,

supply air temperature, exhaust fan setpoint, supply air tempering, Frostat™ and smoke detector. Refer to system input devices and functions for operation.

System Input Devices & Functions

The RTRM must have a zone sensor or thermostat input in

order to operate the unit.The flexibility of having several mode capabilities dependsupon the type of zone sensor or thermostat selected to interface with the RTRM.

The descriptions of the following basic InputDevices used

within the RTRM network are to acquaint the operator with their function as they interface with the various modules. Refer to the unit’s electrical schematic for the specific module connections.

The following controls are available from the factory for

field installation.

Supply Fan Failure Input (Optional)

The Fan Failure Switch can be connected to sense indoor

fan operation:

FFS (Fan Failure Switch) If air flow through the unit is not proven by the differential pressure switch connected to the RTOM (factory set point 0.07 “w.c.) within 40 seconds nominally, the RTRM will shut off all mechanical operations, lock the system out, send a diagnostic to ICS, and the SERVICE output will flash.The system will remain locked out until a reset is initiated either manually or through ICS.

Clogged Filter Switch (Optional)

The unit mounted clogged filter switch monitors the

pressure differential across the return air filters. It is mounted in the filter section and is connected to the RTOM. A diagnostic SERVICE signal is sent to the remote panel if the pressure differential across the filters is at least

0.5" w.c.The contacts will automatically open when the

pressure differential across the filters decreases to approximately 0.4" w.c.The clogged filter output is energized when the supply fan is operating and the clogged filter switch has been closedfor at least 2 minutes.

The system will continue to operate regardless of the

status of the filter switch.

Note: On units equipped with factory installed MERV 13

filters, a clogged filter switch with different pressure settings will be installed. This switch will close when the differential pressure is approximately 0.8' w.c. and open when the differential falls to 0.7" w.c.

Condensate Drain Pan Overflow Switch (Optional)

ReliaTel Option

This input incorporates the Condensate Overflow Switch

(COF) mounted on the drain pan and the ReliaTel Options Module (RTOM).When the condensate level reaches the trip point for 6 continuous seconds, the RTOM will shut down all unit functions until the overflow condition has cleared.The unit will return to normal operation after 6 continuous seconds with the COF in a non-tripped condition. If the condensate level causes unit shutdown more than 2 times in a 3 days period, the unit will be locked-out of operation requiring manual reset of diagnostic system through Zone Sensor or Building Automation System (BAS). Cycling unit power will also clear the fault.

Compressor Disable (CPR1/2)

This input incorporates the low pressure control (LPC) of

each refrigeration circuit and can be activated by opening a field supplied contact installed on the LTB.

If this circuit is open before the compressor is started, the compressor will not be allowed to operate. Anytime this circuit is opened for 1 continuous second during compressor operation, the compressor for that circuit is immediately turned “Off”. The compressor will not be allowed to restart for a minimum of 3 minutes should the contacts close.

If four consecutive open conditions occur during the first three minutes of operation,the compressor for that circuit will be locked out, a diagnostic communicated to the remote panel (if installed), and a manual reset will be required to restart the compressor.

Low Pressure Control

ReliaTel Control

When the LPC is opened for 1 continuous second, the

compressor for that circuit is turned off immediately.The compressor will not be allowed to restart for a minimum of 3 minutes.

If four consecutive open conditions occur during an active call for cooling, the compressor will be locked out, a diagnostic communicated to ICS™, if applicable, and a

RT-SVX38B-EN 7

General Information

manual reset required to restart the compressor. On dual compressor units only the affected compressor circuit is locked out.

High Pressure Control

ReliaTel Control

The high pressure controls are wiredin series between the

compressor outputs on the RTRM and the compressor contactor coils. If the high pressure control switch opens, the RTRM senses a lack of current while calling for cooling and locks the compressor out.

If four consecutive open conditions occur during an active call for cooling, the compressor will be locked out, a diagnostic communicated to ICS™, if applicable, and a manual reset required to restart the compressor. On dual compressor units only the affected compressor circuit is locked out.

Lead/Lag Control (Dual Circuit Only)

ReliaTel Control Only

Lead/Lag is a selectable input located on the RTRM.The RTRM is configured from the factory with the Lead/Lag control disabled.To activate the Lead/Lag function, simply cut the wire connected to J3-8 at the RTRM. When it is activated, each time the designated lead compressor is shut off due to the load being satisfied, the lead compressor or refrigeration circuit switches. When the RTRM is powered up, i.e. after a power failure, the control will default to the number one circuit compressor.

Zone Sensor Module (ZSM) (BAYSENS106*)

This electronic sensor features three system switch

settings (Heat, Cool, and Off) and two fan settings (On and Auto). It is a manual changeover control with single setpoint. (Cooling Setpoint Only)

Zone Sensor Module (ZSM) (BAYSENS108*)

This electronic sensorfeatures four system switch settings

(Heat, Cool, Auto, and Off) and two fan settings (On and Auto). It is a manual or auto changeover control with dual setpoint capability. It can be used with a remote zone temperature sensor BAYSENS077*.

Zone Sensor (BAYSENS110*)

This electronic sensorfeatures four system switch settings

(Heat, Cool, Auto, and Off) and two fan settings (On and Auto) with four system status LED’s. It is a manual or auto changeover control with dual setpoint capability. It can be used with a remote zone temperature sensor BAYSENS077*.

Programmable Zone Sensor - (BAYSENS119*)

This 7 day programmable sensor features 2, 3 or 4 periods

for Occupied or Unoccupied programming per day. If the power is interrupted, the program is retained in permanent memory. If power is off for an extended period of time, only the clock and day may have to be reset.

The Zone Sensor allows selection of 2, 3 or 4 system

modes (Heat, Cool,Auto, and Off), two fan modes (On and

Auto). It has dual temperature selection with

programmable start time capability.

The occupied cooling set point ranges between 45 and 98

º F. The heating set point ranges between 43 and 96ºF.

A liquid crystal display (LCD) displays zone temperature,

temperature set points, day of the week, time, and operational mode symbols.

The Option Menu is used to enable or disable applicable

functions, i.e.; Morning Warm-up, Economizer minimum position override during unoccupied status, Fahrenheit or Centigrade, Supply air tempering, Remote zone temperature sensor, 12/24 hour time display, Smart fan, and Computed recovery.

During an occupied period, an auxiliary relay ratedfor 1.25 amps @ 30 volts AC with one set of single pole double throw contacts is activated.

Status Inputs (4 Wires Optional)

The ZSM can be wired to receive four (4) operating status

signals from the RTRM (HEAT, COOL, SYSTEM “ON”, SERVICE).

Four (4) wires from the RTRM should be connected to the appropriate terminals (7, 8,9&10)ontheZSM.

Remote Zone Sensor (BAYSENS073*)

This electronic sensor features remote zone sensing and

timed override with override cancellation. It is used with a

Trane Integrated Comfort™ building management

system.

Remote Zone Sensor (BAYSENS074*)

This electronic sensor features single setpoint capability

and timed override with override cancellation. It is used with aTrane Integrated Comfort™ building management system.

Remote Zone Sensor (BAYSENS016*)

This bullet type temperature sensor can be used for

outside air (ambient) sensing, return air temperature sensing, supply air temperature sensing, remote temperature sensing (uncovered). Wiring proceduresvary according to the particular application and equipment involved. Refer to the unit’s wiring diagrams for proper connections.

Remote Zone Sensor (BAYSENS077*)

This electronic sensor can be used with BAYSENS106*,

108*, 110*, 119* Remote Panels.When this sensor is wired to a BAYSENS119* Remote Panel, wiring must be 18 AWG ShieldedTwisted Pair (Belden 8760 or equivalent). Refer to the specific Remote Panel for wiring details.

Wireless Zone Sensor (BAYSENS050)

This electronic sensor features five system settings (Auto,

Off, Cool, Heat, and Emergency Heat) and with On and

8 RT-SVX38B-EN

Auto fan settings. It is amanual or auto changeover control with dual setpoint capability. Other features include a timed override function, lockable system settings, and Fahrenheit or Celsius temperature display. Included with the wireless zone sensor will be a receiver that is to be mounted inside the unit, a mounting bracket, and a wire harness.

High Temperature Sensor (BAYFRST001*)

This sensor connects to the RTRM Emergency Stop Input

on the LTB andprovides high limit “shutdown” of the unit.

The sensor is used to detect high temperatures due to a

high thermal event in the air conditioning or ventilation ducts.The sensor is designed to mount directly to the sheet metal duct. Each kit contains two sensors.The return air duct sensor (X1310004001) is set to open at 135ºF. The supply air duct sensor (X1310004002) is set to open at 240ºF. The control can be reset after the temperature has been lowered approximately 25ºF below the cutout setpoint.

Evaporator Frost Control

ReliaTel™ Option

This input incorporates the Frostat™ control (FOS)

mounted in the indoor coil circuit and can be activated by closing a field supplied contact installed in parallel with the FOS.

General Information

Discharge LineTemp Switch (DLTS)

The DLTS is looped in series with HPC and LPC. It prevents

compressor from overheating (over 300 Fº dome temp) in case of indoor fan failure (cooling) or outdoor fan failure (heating).

Phase Monitor

This sensor monitors voltage between the 3 conductors of

the 3 phase power supply.Two LED lights are provided:

• The green light indicates that a balanced 3 phase supply circuit is properly connected.

• The red light indicates that unit operation has been prevented.There are two conditions that will prevent unit operation:

• The power supply circuit is not balanced with the

proper phase sequence of L1, L2, L3 for the 3 conductors of a 3 phase circuit.

• The line to line voltage is not between 180 volts and

633 volts.

RT-SVX38B-EN 9

Unit Dimensions

Figure 1 illustrates the minimum operating and service

clearances for either a single or multiple unit installation.

These clearances are the minimum distancesnecessary to

assure adequate serviceability, cataloged unit capacity, and peak operating efficiency.

Figure 1. Typical installation clearances for single & multiple unit applications

Providing less than the recommended clearances may result in condenser coil starvation, “short-circuiting” of exhaust and economizer airflows, or recirculation of hot condenser air.

YSC060ED

10 RT-SVX38B-EN

YSC072-120ED

Figure 2. 5 tons standard efficiency

44 MMMM

1038 MMMM

1053 MMMM

Notes:

1. All dimensions are in inches/millimeters.

2. ½ NPT Gas Connection

Unit Dimensions

Figure 3. 5 tons standard efficiency - roof curb

Note: All dimensions are in inches/millimeters.

1038

1053

RT-SVX38B-EN 11

Unit Dimensions

Figure 4. 5 tons standard efficiency - unit clearance and roof opening

Note: All dimensions are in inches/millimeters.

CLEARANCE 36” (914 MM)

Figure 5. 6, 7½ tons standard efficiency

Note: All dimensions are in inches/millimeters.

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Figure 6. 6, 7½ tons standard efficiency - roof curb

Note: All dimensions are in inches/millimeters.

Unit Dimensions

(356 MM)

Figure 7. 6, 7½ tons standard efficiency - unit clearance and roof opening

Note: All dimensions are in inches/millimeters.

(2130 MM)

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Unit Dimensions

Figure 8. 8½ - 10 tons standard efficiency

Note: All dimensions are in inches/millimeters.

1/2 NPT GAS CONNECTION

Figure 9. 8½ - 10 tons standard efficiency - roof curb

Note: All dimensions are in inches/millimeters.

(356 MM)

(2130 MM)

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Figure 10. 8½ - 10 tons standard efficiency - unit clearance and roof opening

Note: All dimensions are in inches/millimeters.

Unit Dimensions

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Trane YSC060ED, YSC120ED Installation, Operation And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual