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SAFETY WARNING

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.

Packaged Rooftop Air Conditioners
Precedent™—Gas/Electric

5 to 10 Tons—50 Hz

RT-SVX38C-EN

March 2015

Installation, Operation, 
and Maintenance

Summary of Contents for RT-SVX38C-EN

Page 1: ...owledge 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 li...

Page 2: ...icates 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 r...

Page 3: ...t written permission Trane reserves the right to revise this publication at any time and to make changes to its content without obligation to notify any person of such revision or change Trademarks Al...

Page 4: ...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 M...

Page 5: ...Talk communications interface Digit 22 Refrigeration System Option 0 Standard refrigeration system5 Digit 23 Refrigeration Controls Note Applicable to digit 7 E 0 No refrigeration control2 1 Frostat 6...

Page 6: ...l 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 shipm...

Page 7: ...ntial 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 fil...

Page 8: ...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 i...

Page 9: ...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 in...

Page 10: ...ances necessary to assure adequate serviceability cataloged unit capacity and peak operating efficiency Providing less than the recommended clearances may result in condenser coil starvation short cir...

Page 11: ...ons standard efficiency Notes 1 All dimensions are in inches millimeters 2 NPT Gas Connection Figure 3 5 tons standard efficiency roof curb Note All dimensions are in inches millimeters 7 44 44 MM MM...

Page 12: ...38C EN 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 7 tons standard efficiency Note All dimensions a...

Page 13: ...6 6 7 tons standard efficiency roof curb Note All dimensions are in inches millimeters 2130 MM 356 MM Figure 7 6 7 tons standard efficiency unit clearance and roof opening Note All dimensions are in...

Page 14: ...fficiency Note All dimensions are in inches millimeters 1 2 NPT GAS CONNECTION 80 mbh 120 mbh 3 4 NPT GAS CONNECTION 150 mbh 200 mbh 250 mbh YC MODELS Figure 9 8 to 10 tons standard efficiency roof cu...

Page 15: ...Unit Dimensions RT SVX38C EN 15 Figure 10 8 to 10 tons standard efficiency unit clearance and roof opening Note All dimensions are in inches millimeters...

Page 16: ...to the state of California to cause cancer through inhalation Glass wool fibers may also cause respiratory skin or eye irritation WARNING Heavy Objects Ensure that all the lifting equipment used is p...

Page 17: ...ximum unit and corner weights lbs kgs and center of gravity dimensions in mm gas electric models Unit Model No Maximum Model Weights a Corner Weights b Center of Gravity in mm Tons Shipping Net A B C...

Page 18: ...w during operation as well as proper operation of the condensate overflow switch if equipped the unit and curb must be level If the unit is elevated a field constructed catwalk around the unit is stro...

Page 19: ...fy that the installation location of the unit will provide the required clearance for proper operation Assemble and install the roof curb if applicable Refer to the latest edition of the curb installe...

Page 20: ...o TCO 1 instructions TCO1 Instructions Unit Model Number YSC060ED H If the unit being installed is YSC060ED H the limit control TCO1 must be replacedwiththe extra limit control shipped in the heater c...

Page 21: ...the following figure for proper tube positioning based on unit tonnage 6 After completing installation of the duct covers for horizontal discharge proceed to TCO 1 instructions TCO1 Instructions Unit...

Page 22: ...1 Remove evaporator access panel and supply air access panels 2 Remove the support panel that the condensate drain pan exits through 3 Slide the condensate drain pan out of the unit and rotate 180 4...

Page 23: ...n of the applicable electrical service entrance is illustrated in Unit Dimensions p 10 Complete the unit s power wiring connections at Compressor Contactor 1 CC1 inside the unit control panel Refer to...

Page 24: ...refer to Unit Dimensions p 10 for the electrical access locations provided on the unit Table 5 p 24 lists the conductor sizing guidelines that must be followed when interconnecting the DC binary outp...

Page 25: ...mber of remote sensors is required Example 2 illustrates three sensors squared in a series parallel circuit Using BAYSENS077 two sensors are required to accomplish space temperature averaging Example...

Page 26: ...Installation 26 RT SVX38C EN Figure 28 Examples...

Page 27: ...38C EN 27 Figure 29 Typical field wiring diagrams for optional controls ReliaTel only BAYSENS075 BAYSENS075 BAYSENS119 BAYSENS110 BAYSENS108 BAYSENS106 BAYSENS073 BAYSENS074 BAYSENS075 ASYSTAT669A OPT...

Page 28: ...Pipe Pipe 1 Pipe 1 Pipe 1 Pipe 15 76 176 345 750 1220 30 52 120 241 535 850 45 43 99 199 435 700 60 38 86 173 380 610 75 77 155 345 545 Note Capacity of pipe of different diameters and lengths in cu f...

Page 29: ...much as a 20 current imbalance with a resulting increase in motor winding temperatures that will decrease motor life If the voltage imbalance is over 2 notify the proper agencies to correct the volta...

Page 30: ...wer disconnect switch and the unit mounted disconnect switch if applicable Note Upon closing main power disconnect and the unit mounted disconnect switch or circuit breaker the phase monitor will veri...

Page 31: ...rforms self diagnostic checks to ensure that all internal controls are functional It also checks the configuration parameters against the components connected to the system The System LED located on t...

Page 32: ...edure Economizer Start Up ReliaTel Control Using the Service Test Guide in Table 9 p 31 momentarily jump across the Test 1 and Test 2 terminals on LTB1 one time to start the Minimum Ventilation Test 1...

Page 33: ...n the heating mode Momentarily jump across the Test 1 and Test 2 terminals on LTB1 one additional time if continuing from previous component start up or until the desired start up component Test is st...

Page 34: ...deflection force must not exceed the maximum force value shown in Table 10 7 Recheck the belt tension at least twice during the first 2 to 3 days of operation Belt tension may decrease until the new...

Page 35: ...state and local laws Heating Season Inspect the unit s air filters If necessary clean or replace them Check supply fan motor bearings repair or replace the motor as necessary Inspect both the main un...

Page 36: ...it still appears to be dirty repeat Steps 6 and 7 9 Reinstall all of the components and panels removed in Step 1 and any protective covers installed in Step 2 Note For units equipped with hail guards...

Page 37: ...tions ___________________________________________ Table 11 Sample maintenance log Refrigerant Circuit 1 Refrigerant Circuit 2 Date Current Ambient Temp F C Compr Oil Level Suct Press Psig kPa Disch Pr...

Page 38: ...e troubleshooting Refer to the sequence of operations for each mode to assist in verifying proper operation Make the necessary repairs and proceed to Steps 7 and 8 7 If no abnormal operating condition...

Page 39: ...between terminals J6 7 and J6 6 Heat operating approximately 32 VDC Heat off less than 1 VDC approximately 0 75 VDC Heating failure voltage alternates between 32 VDC and 0 75 VDC Cool Failure Measure...

Page 40: ...for programmable or digital models and are conducted with the Zone Sensor Module electrically removed from the system Test 1 Zone Temperature Thermistor ZTEMP This component is tested by measuring the...

Page 41: ...economizer and condenser fan cycling functions are disabled 1 Open and lock the unit disconnect switch 2 Remove the Outside Air Sensor OAS from the condenser section of unit 3 Use 2 wire nuts to indi...

Page 42: ...lains resetting the system at the unit Resetting Lockouts Method 1 To reset the system from the space turn the Mode selection switch at the thermostat to the OFF position After approximately 30 second...

Page 43: ...12 0110 4366 1005 0104 4366 1543 0110 060EDR 4366 1015 0104 4366 1005 0104 4366 1540 0110 072EDR 4366 1015 0104 4366 1005 0104 4366 1540 0110 090EDR 4366 1042 0110 4366 1034 0110 4366 1532 0110 102EDR...

Page 44: ...LIED IN LAW OR IN FACT INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR USE AND IN NO EVENT SHALL WARRANTOR BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES Some states...

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Page 48: ...controls and HVAC systems comprehensive building services and parts For more information visit www Trane com Trane has a policy of continuous product and product data improvement and reserves the righ...

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