Ingersoll-Rand Precedent WSC036E, Precedent WSC120E, Precedent WSC048E, Precedent WSC060E, Precedent WSC072E Installation, Operation And Maintenance Manual

...

Installation, Operation, and Maintenance

Packaged Rooftop Air Conditioners Precedent™ — Heat Pump

3 – 10 Tons – 60 Hz

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 alter ed 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.

August 2012 RT-SVX23F-EN

WSC036E - WSC120E

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 situation that 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 af fect 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. T rane 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, y ou MUST f ollow r equir ements 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/servi cin g th is un it, technicians MUST put on all P ersonal Protective Equipmen t (PPE) recommended for the work being undertaken. AL W A YS r efer to appr opriate MSDS sheets and OSHA guidelines for proper PPE.

• When working with or ar ound hazar dous chemi cals, 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, te chnicians 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 f ollow recommendations could result in death or serious injury.

Revision Summary

RT-SVX23F-EN (18 July 2012)

• MERV 8 filter with filter removal tool

• Stainless steel drain pan, condensate overflow switch

• Updated Model Number Description, Maintenance, Troubleshooting

Table of Content

Model Number Descriptions . . . . . . . . . . . . . . 5

Model Number Notes . . . . . . . . . . . . . . . . 6

General Information . . . . . . . . . . . . . . . . . . . . . 7

Unit Nameplate . . . . . . . . . . . . . . . . . . . . . . . 7

Compressor Nameplate . . . . . . . . . . . . . . . . 7

Unit Description . . . . . . . . . . . . . . . . . . . . . . . 7

Economizer Control Actuator (Optional) . 7 RTCI - ReliaTel™ Trane Communication I nter-

face (Optional) . . . . . . . . . . . . . . . . . . . . . . 7

RLCI - ReliaTel™ LonTalk Communication In-

terface (Optional) . . . . . . . . . . . . . . . . . . . . 7

RBCI - ReliaTel BACnet Communications In-

terface (Optional) . . . . . . . . . . . . . . . . . . . . 7

RTOM – ReliaTel™ Options Module . . . . . 7

System Input Devices & Functions . . . . . . . 7

Unit Clearances . . . . . . . . . . . . . . . . . . . . . . . . . 11

Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . 17

Unit Inspection . . . . . . . . . . . . . . . . . . . . . 17

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Unit Clearances . . . . . . . . . . . . . . . . . . . . 17

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . 21

Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

General Unit Requirements . . . . . . . . . . . . 23

Factory Installed Economizer . . . . . . . . . 23

Temperature Limit Switch Usage for Electric

Heat Units . . . . . . . . . . . . . . . . . . . . . . . . . 23

Horizontal Discharge Conversion WSC036E,

WSC048E (3 - 4 Ton Units) . . . . . . . . . . . 23

Horizontal Discharge Conversion WSC060-

120E (5 - 10 Ton Units) . . . . . . . . . . . . . . . 24

TCO-A Instructions . . . . . . . . . . . . . . . . . . 25

Return Air Smoke Detector . . . . . . . . . . . 25

Main Electrical Power Requirements . . . 26

Electric Heat Requirements . . . . . . . . . . . 26

Low Voltage Wiring

(AC & DC) Requirements . . . . . . . . . . . . . 26

Condensate Drain Configuration . . . . . . 27

Filter Installation . . . . . . . . . . . . . . . . . . . . 27

Field Installed Power Wiring . . . . . . . . . . .28

Main Unit Power Standard Wiring . . . . . .28

Main Unit Power Optional TBUE Wiring

(Through the Base Electrical Option) . . . .28

Field Installed Control Wiring . . . . . . . . . .29

Smoke Detector - (ReliaTel™ Only) Customer

Low Voltage Wiring . . . . . . . . . . . . . . . . . .32

Pre-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Space Temperature Averaging (ReliaTel™

only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Voltage Imbalance . . . . . . . . . . . . . . . . . . .35

Electrical Phasing (Three Phase Motors) .36 Compressor Crankcase Heaters (Optional on

WSC036E*, WSC048E1, and WSC060E1 -

Standard on Remaining Units) . . . . . . . . .36

ReliaTel Controls . . . . . . . . . . . . . . . . . . . .36

Test Modes . . . . . . . . . . . . . . . . . . . . . . . . .37

Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Verifying Proper Air Flow . . . . . . . . . . . . . . .38

Units with 5-Tap Direct Drive Indoor Fan .38

Units with Belt Drive Indoor Fan . . . . . . . .39

ReliaTel Units with Direct Drive Indoor Fan

(7.5 - 10 Ton Units) . . . . . . . . . . . . . . . . . . .39

Return Air Smoke Detector . . . . . . . . . . . .40

Economizer Start-Up ReliaTel Control . . .40

Compressor Start-Up . . . . . . . . . . . . . . . . .41

Heating Start-Up . . . . . . . . . . . . . . . . . . . .41

Final System Setup . . . . . . . . . . . . . . . . . .42

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Fan Belt Adjustment - Belt Drive Units . . . .43

Monthly Maintenance . . . . . . . . . . . . . . . . . .44

Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Return Air Smoke Detector Maintenance 44

Condensate Overflow Switch . . . . . . . . . .44

Cooling Season . . . . . . . . . . . . . . . . . . . . .44

Heating Season . . . . . . . . . . . . . . . . . . . . .44

Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . .44

Final Process . . . . . . . . . . . . . . . . . . . . . . . .46

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . .47

System Status Checkout Procedure . . . . . .47

RT-SVX23F-EN 3

Table of Content

Method 1 . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Method 2 . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Resetting Cooling and Heating Lockouts 48 Zone Temperature Sensor (ZTS) Service Indi-

cator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Clogged Filter Switch . . . . . . . . . . . . . . . . 49

Fan Failure Switch . . . . . . . . . . . . . . . . . . 49

Condensate Overflow Switch . . . . . . . . . 49

Zone Temperature Sensor (ZTS) Test . . 49 Programmable & Digital Zone

Sensor Test . . . . . . . . . . . . . . . . . . . . . . . . 50

Unit Economizer Control (ECA) Trouble-

shooting ReliaTel Control . . . . . . . . . . . . 50

Troubleshooting Procedures for Direct Drive

Plenum Fan . . . . . . . . . . . . . . . . . . . . . . . . 51

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . 52

Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . 53

Heat Pump WCC, WCD, WCH, WCM and WSC

(Parts Only) . . . . . . . . . . . . . . . . . . . . . . . . 53

Heat Pump WCZ, WCY, WCX, WCC, WCD, WCH, WCM, WCP and WSC (Parts Only) 54

4 RT-SVX23F-EN

Model Number Descriptions

WSC 120 E 4 R 0 A **

123 456 7 8 9 10 11 1213

Digit 1 - Unit Type

W Packaged Heat Pump

Digit 2 - Efficiency

S Standard Efficiency

Digit 3 - Airflow

C Convertible

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

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

Digit 7 - Major Design Sequence

E R-410A Refrigerant

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

R ReliaTel™ Microprocessor

Digit 10 - Heating Capacity

0=No Electric Heat F=14 kW (1 phase) A=5 kW (1 phase)1G=18 kW (1&3 phase) B=6 kW (3 phase) J=23 kW (3 phase) C=9 kW (3 phase) K= 27 kW (3 phase) D=10 kW (1 phase) E=12 kW (3 phase) P = 54 kW (3 phase)

N = 36 kW (3 phase)

Digit 11 - Minor Design Sequence

A First Sequence

Digit 12,13 - Service Sequence

** Factory Assigned

Digit 14 - Fresh Air Selection

0No 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 G Economizer, Comparative

H Economizer, Comparative

0-50% without Barometric Relief with Barometric Relief

0-100% without Barometric Relief 0-100% with Barometric Relief Enthalpy 0-100% without

Barometric Relief Enthalpy 0-100% with Barometric

Relief

Digit 15 - Supply Fa n/Drive Type/ Motor

0 Standard Drive 1 Oversized Motor 2 Optional Belt Drive Motor 6 Single Zone Variable Air

Volume (SZVAV)

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

Digit 18 - Through the Base Provisions

0 No Through the Base Provisions A Through the Base Electric

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 Options

0 No Communications Interface 1 Trane Communications Interface 2 LonTalk® Communications Interface 6 BACnet™ Communications Interface

Digit 22 - Refrigeration System Option

0 Standard Refrigeration System

Digit 23 - Refrigeration Controls

0 No Refrigeration Control 1Frostat

2 Crankcase Heater 3 Frostat and Crankcase Heater

11,13

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

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

Fail Switch

5 Clogged Filter Switch and Discharge

Air Sensing Tube

6 Fan Fail Switch and Discharge Air

Sensing Tube

7 Clogged Filter and Fan Fail Switches

and Discharge Air Sensing Tube

A Condensate Drain Pan Overflow

Switch

B Clogged Filter Switch and

Condensate Drain Pan Overflow Switch

C Fan Failure Switch and Condensate

Drain Pan Overflow Switch

D Discharge Air Sensing and

Condensate Drain Pan Overflow Switch

E Clogged Filter Switch, Fan Failure

Switch and Condensate Drain Pan

Overflow Switch

F Clogged Filter Switch, Discharge

Air Sensing Tube and Condensate Drain Pan Overflow Switch

G Fan Failure Switch, Discharge Air

Sensing Tube and Condensate Drain Pan Overflow Switch

H Clogged Filter Switch, Fan Failure

Switch, Discharge Air Sensing and Condensate Drain Pan Overflow Switch

Digit 26 - System Monitoring Controls

0 No Monitoring Controls A Demand Control Ventilation (CO

Digit 27 - Unit Hardware Enhancements

0 No Enhancements 1 Stainless Steel Drain Pan

)

RT-SVX23F-EN 5

Model Number Descriptions

Model Number Notes

1. Available on 3-5 ton models.

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

3. High pressure control is standard on all units.

4. Multispeed direct drive standard on single-phase products. Belt drive standard on three-phase 37½ ton. Variable speed direct drive standard on 10 ton.

5. 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 be ordered as field installed accessory .

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

7. Requires use of Disconnect or Circuit Breaker.

8. Standard metering devices are TXVs.

9. The return air smoke dete ctor may not fit up or work properly 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.

10. Requires hinged access panels.

11. Crankcase heaters are only available as option on WSC036E, WSC048E1, & WSC060E1. CCH are standard on all other units.

12. Motorized outside air damper is not available on Multi-Speed or SZVAV (Single Zone Variable Air Volume)

13. Frostat standard on Multi-speed and SZVA V (Single Zone V ariable Air Volume)

14. Multi-speed indoor fan only available on 10 ton products.

15. Demand Control Ventilation Option includes wiring only. The

products.

sensor is a field-installed only

option.

6 RT-SVX23F-EN

General Information

Unit Nameplate

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

Compressor Nameplate

The nameplate for the compressors are located on the 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 coils are aluminum fin, mechanically bonded to copper tubing.

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

The ReliaT el™ 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 in response to; zone temperature, supply air temperature, and/or humidity conditions depending on the application. The stages of capacity control for these units is 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 interpret information from other unit modules, sensors, remote panels, and customer binary contacts to satisfy the applicable request for cooling.

Economizer Control Actuator (Optional)

The ECA monitors the mixed air temperature, return air temperature, minimum position setpoint (local or remote), power exhaust setpoint, CO2 setpoint, CO2, and 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.

RLCI - ReliaTel™ LonTalk Communication Interface (Optional)

This module is used when the application calls for an ICSTM building management type control system that is LonT alk. 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.

RBCI - ReliaTel BACnet Communications Interface (Optional)

This module is used when the application calls for an open 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

The RT OM monitors the supply fan proving, clogged filter , supply air temperature, exhaust fan setpoint, supply air tempering, Frostat™ and smoke detector. R efer to system input devices and functions for operation.

This module is standard on 10 ton products.

System Input Devices & Functions

The RTRM must have a zone sensor or thermostat input in order to operate the rooftop unit. The flexibility of havi ng several mode capabilities depends upon the type of zone sensor thermostat selected to interface with the RTRM.

The descriptions of the following basic Input Devices 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.

RT-SVX23F-EN 7

General Information

Supply Fan Failure Input (Optional)

The Fan Failure S witch 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 RTRM (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 RTO M. A diagnostic SER V ICE 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 switc h has been closed for at least 2 minutes. The system will continue to operate regardless of the status of the filter switch.

Note: On units equipped with factory instal led 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)

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

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

High Pressure Control

The high pressure controls are wired in series between the compressor outputs on the RTRM and the compressor contactor coils. If the high pressure control switch opens, the RTRM senses a lac k of current while calling for cool ing and locks the compressor out.

ReliaTel Option

This input incorporates the Condensate Overflow Switch (COF) mounted on the drain pan and the ReliaT el 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 pow er 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

8 RT-SVX23F-EN

Power Exhaust Control (Optional)

The power exhaust fan is started whenever the position of the economizer dampers meets or exceed the power exhaust setpoint when the indoor fan is on.

The setpoint panel is located in the return air section and is factory set at 25%.

Lead/Lag Control (Dual Circuit Only)

Lead/Lag is a selectable input located on the RTRM. The RTRM is configured from the factory with the Lead/Lag control disabled. T o 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. af ter a power failure, the control will default to the number one circuit compressor.

Zone Sensor Module (ZSM) (BAYSENS107*)

This electronic sensor features three system switch settings (Heat, Cool, and Off) and two fan settings (On and

General Information

Auto). It is a manual changeover control with single setpoint. (Cooling Setpoint Only)

Zone Sensor Module (ZSM) (BAYSENS109*)

This electronic sensor features 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*.

Programmable Zone Sensor - (BAYSENS119*)

This 7 day programmable sensor features 2, 3 or 4 periods for Occupied or Unoccupied programming per d ay. 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 degrees Fahrenheit. The heating set point ranges between 43 and 96 degrees Fahrenheit.

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 rated for 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) on the ZSM.

Remote Zone Sensor (BAYSENS073*)

This electronic sensor features remote zone sensing and timed override with over ride 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 a Trane 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 procedures vary 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 P anels. When this sensor is wired to a BAYSENS11 9* remote panel, wiring must be 18 AWG shielded twisted 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 Emerg ency Heat) and with On and Auto fan settings. It is a manual or auto c hangeover 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 located on the LT B and provides high limit “shutdown” of the unit and requires a manual reset. The sensor is used to detect high temperatures due to fire in the air conditioning or ventilation ducts. The sensor is desig ned to mount directly to the sheet metal duct. Each kit contains two sensors. The return air duct sensor (X1310004001) is set to open at 135°F. The supply air duct sensor (X131 0004002) is set to open at 240°F. The control can be reset after the temperature has been lowered approximately 25°F below the cutout setpoint.

Evaporator Frost Control

This input incorporates the Frostat™ control (FOS) located on the indoor coil and can be activated by closing a field supplied contact installed in parallel with the FOS.

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 FOS close.

Frostat is standard on multi-speed indoor motors and single zone VAV products (SZVAV).

Smoke Detector Sensor (Optional)

This sensor is only applicable on units equipped with a RTOM. It provides high limit “shutdown” of the unit and requires a manual reset. The sensor is used to detect smoke due to fire in the air conditioning or ventilation ducts.

RT-SVX23F-EN 9

General Information

Important:

• The supply air smoke detector samples supply air. The

return and plenum air smoke detectors sample return air. The smoke detectors are designed to shut off the unit if smoke is sensed in the supply air stream or return air stream. This function is performed by sampling the airflow enteri ng the unit at the return air opening. Follow the instructions provided below to assure that the airflow through the unit is sufficient for adequate sampling. Failure to follow t hese instructions will prevent the smoke detectors from performing it's design function.

• Airflow through the unit is affected by the amount of dirt and debris accumulated on the indoor coil and filters. To insure that airflow through the unit is adequate for proper sampling by the return air smoke detector, complete adherence to the maintenance procedures, including recommended intervals between filter changes, and coil cleaning is required.

• Periodic c hec ks and maintenance procedures must be performed on the smoke detector to insure that it will function properly . For detailed instructions concerning these checks and procedures, refer to the appropriate section(s) of the smoke detector Installation and Maintenance Instructions provided with the literature package for this unit.

In order for the supply air smoke detector or return air smoke detector to properly sense smoke in the supply air stream or return air stream, the air velocity entering the smoke detector unit must be between 500 and 4000 feet per minute. Equipment covered in this manual will develop an airflow velocity that falls within these limits over the entire airflow range specified in the evaporator fan performance tables.

Phase Monitoring protection

Precedent units with 3-phase power are equipped with phase monitoring protection as standard. These devices protect motors and compressors against problems caused by phase loss, phase imbalance, and phase reversal indication.

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 v olts and 633 volts.

10 RT-SVX23F-EN

Unit Clearances

WSC036-048E Units

WSC060-120E Units

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

RT-SVX23F-EN 11

Unit Clearances

CLEARANCE 36” (914 MM)

Figure 2. Heat pump - 3-4 ton standard efficiency

Note: All dimensions are in inches/millimeters.

 

Figure 3. Heat pump - 3-4 ton standard efficiency - unit clearance and roof opening

Note: All dimensions are in inches/millimeters.

12 RT-SVX23F-EN

Figure 4. Heat pump - 3-4 ton standard efficiency - roof curb

4444 MMMM

10381038 MMMM

10531053 MMMM

Note: All dimensions are in inches/millimeters.

Unit Clearances

Figure 5. Hea t pumps - 5-6 ton standard efficiency

Note: All dimensions are in inches/millimeters.

RT-SVX23F-EN 13

Unit Clearances

Figure 6. Heat pump - 7½ ton standard efficiency

Note: All dimensions are in inches/millimeters.

Figure 7. Heat pump - 5-7½ ton - unit clearance and roof opening

Note: All dimensions are in inches/millimeters.

14 RT-SVX23F-EN

Figure 8. Heat pump - 5-7½ ton - roof curb

(2130 MM)

(356 MM)

ALTERNATE CONDENSATE DRAIN CONNECTION 3/4-14 NPT DIA.HOLE

INDOOR TOP PANEL

OUTDOOR TOP PANEL

50 7/8”

1292 MM

63 3/16”

1605 MM

99 11/16”

2532 MM

UNIT POWER WIRE 1 3/8” (35MM) DIA. HOLE

EVAPORATOR SECTION ACCESS PANEL

47 7/8”

1216 MM

27 5/8”

701 MM

2” ELECTRICAL CONNECTION (SINGLE POINT POWER WHEN HEAT INSTALLED)

COMPRESSOR ACCESS PANEL

CONDENSER COIL

CONTROL BOX SECTION ACCESS PANEL

UNIT CONTROL WIRE

/8”(

22MM

)

DIA HOLE

SERVICE GAUGE PORT ACCESS 1 3/8” (35MM) DIA. HOLE

Note: All dimensions are in inches/millimeters.

Unit Clearances

Figure 9. Heat pump - 10 ton standard efficiency

Notes:

1. All dimensions are in inches/millimeters.

2. 2" Electrical Connection: Single Point Power When Heat Installed (WSC Models only.)

RT-SVX23F-EN 15

Unit Clearances

99 11/16”

(2532 MM)

63 3/16”

(1605 MM)

13/4”

(

44 MM

)

2”

(

51 MM

)

84 1/2”

(2146 MM)

83 7/8”

(2130 MM)

60 3/8”

(1534 MM)

59 7/8”

(

1521 MM

)

14”

(

356 MM

)

2”

(

51 MM

)

56 3/8”

(1432 MM)

34 3/8”

(873 MM)

34 3/8”

(873 MM)

18 1/2”

(470 MM)

18 1/2”

(470 MM)

1”

(

25 MM

)1”(

25 MM

)

1”

(

25 MM

)

65/8”

(

168 MM

)

80 1/2”

(2045 MM)

EARANCE 18” (4

57 MM

)

RIZO

NTAL

CLE

ARAN

E36”(914 MM)

WNFLOW

Figure 10. Heat pump - 10 ton standard efficiency - unit clearance and roof opening

Notes:

1. All dimensions are in inches/millimeters.

Figure 11. Heat pump - 10 ton standard efficiency - roof curb

Notes:

1. All dimensions are in inches/millimeters.

16 RT-SVX23F-EN

Pre-Installation

Unit Inspection

As soon as the unit arrives at the job site

• V erify that the nameplate data matches the data on the sales order and bill of lading (includin g 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.

WARNING

Fiberglass Wool!

Product contains fiberglass wool. Disturbing the insulation in this product during installation, maintenance or rep air will expose you to airborne particles of glass wool fibers and ceramic fibers known to the state of California to cause cancer through inhalation. You MUST wear all necessary Personal Protective Equipment (PPE) including gloves, eye protection, mask, long sleeves and pants when working with products containing fiberglass wool. Exposition to glass wool fibers without all necessary PPE equipment could result in cancer, respiratory, skin or eye irritation, which could result in death or serious injury.

Precautionary Measures:

• Avoid breathing fiberglass dust.

• Use a NIOSH approved dust/mist respirator.

• Avoid contact with the skin or eyes. Wear long-

sleeved, loose-fitting clothing, gloves, and eye protection. Wash clothes separately from other clothing: rinse washer thoroughly.

• Operations such as sawing, blo wing, t ear-out, and

spraying may generate fiber concentrations requiring additional respir atory protection. Use the appropriate NIOSH appro ved respiration in th ese situations.

First Aid Measures:

• Eye Contact - Flush eyes with wa ter to remove du st.

If symptoms persist, seek medical attention.

• Skin Contact - Wash aff ected areas gently with soap

and warm water after handling.

If the job site inspection of the unit reveals damage or material shortages, file a claim with the carrier immediately. Specify the type and extent of the 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.

Storage

Take precautions to prevent condensate from forming inside the unit’s electrical compartments and motors if:

• the unit is stored before it is installed; or,

• the unit is set on the roof curb, and temporary heat is provided in the building. Isolat e al l side p anel servi ce entrances and base pan openings (e.g., conduit holes, S/A and R/A 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 hea t

without first completing the start-up procedure detailed under “Starting the Unit”.

The manufacturer will not assume any responsibility for equipment damage resulting from condensate accumulation on the unit’s electrical and/or mechanical components.

Unit Clearances

p. 11 illustrates the minimum operating and service

clearances for either a single or multiple unit installation. These clearances are the minimum distances necessary to assure adequate serviceability, cataloged unit capacity, and peak operating efficiency.

Important: 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.

RT-SVX23F-EN 17

+ 39 hidden pages

Ingersoll-Rand Precedent WSC036E, Precedent WSC120E, Precedent WSC048E, Precedent WSC060E, Precedent WSC072E Installation, Operation And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual