Table of Contents
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Installation, Operation,
and Maintenance
Packaged Rooftop Air Conditioners
Precedent™—Gas/Electric
5 to 10 Tons—50 Hz
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.
March 2015
SAFETY WARNING
RT-SVX38C-EN
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Table of Contents
Troubleshooting
Related Manuals for Trane RT-SVX38C-EN
Summary of Contents for Trane RT-SVX38C-EN
- Page 1 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. RT-SVX38C-EN March 2015...
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Page 2: Introduction
Carbon (HCFCs). Not all refrigerants containing these instructions. compounds have the same potential impact to the environment. Trane advocates the responsible handling of • If there is a risk of energized electrical contact, arc, or all refrigerants-including industry replacements for CFCs flash, technicians MUST put on all PPE in accordance such as HCFCs and HFCs. -
Page 3: Copyright
Copyright This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in part without 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. -
Page 4: Table Of Contents
....36 Final Process ......37 RT-SVX38C-EN... -
Page 5: Model Number Description
Digit 12,13—Service Sequence Manual outside air damper will ship No communications interface ** Factory assigned factory supplied within the unit, but Trane communications interface Digit 14—Fresh Air Selection must be field installed. LonTalk® communications interface No Fresh air 2. High pressure control crankcase Digit 22—Refrigeration System... -
Page 6: General Information
25 inch pounds of torque and detailed under “Unit Start-Up, ” p. is powered by 24 VAC. The manufacturer will not assume any responsibility for RTCI—ReliaTel™ Trane Communication equipment damage resulting from condensate accumulation on the unit’s electrical and/or mechanical Interface (Optional) components. -
Page 7: Low Pressure Control
The unit-mounted clogged filter switch monitors the compressor will not be allowed to restart for a minimum pressure differential across the return air filters. It is of 3 minutes. mounted in the filter section and is connected to the RT-SVX38C-EN... -
Page 8: High Pressure Control
This electronic sensor features single setpoint capability setpoint. (Cooling Setpoint Only) and timed override with override cancellation. It is used with a Trane Integrated Comfort™ building management Zone Sensor Module (ZSM) (BAYSENS108*) system. This electronic sensor features four system switch settings... -
Page 9: Evaporator Frost Control
• 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-SVX38C-EN... -
Page 10: Unit Dimensions
These clearances are the minimum distances necessary to exhaust and economizer airflows, or recirculation of hot assure adequate serviceability, cataloged unit capacity, condenser air. and peak operating efficiency. Figure 1. Typical installation clearances for single and multiple unit applications YSC060ED YSC072-120ED RT-SVX38C-EN... - Page 11 5 tons standard efficiency Notes: 1. All dimensions are in inches/millimeters. 2. ½ NPT Gas Connection Figure 3. 5 tons standard efficiency—roof curb Note: All dimensions are in inches/millimeters. 44 MM 44 MM 1038 1038 MM 1053 1053 MM RT-SVX38C-EN...
- Page 12 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. RT-SVX38C-EN...
- Page 13 Figure 6. 6, 7½ tons standard efficiency—roof curb Note: All dimensions are in inches/millimeters. (356 MM) (2130 MM) Figure 7. 6, 7½ tons standard efficiency—unit clearance and roof opening Note: All dimensions are in inches/millimeters. CLEARANCE 36” (914 MM) RT-SVX38C-EN...
- Page 14 1/2 NPT GAS CONNECTION (80 mbh, 120 mbh) 3/4 NPT GAS CONNECTION (150 mbh, 200 mbh, 250 mbh) (YC MODELS) Figure 9. 8½ to 10 tons standard efficiency—roof curb Note: All dimensions are in inches/millimeters. (356 MM) (2130 MM) RT-SVX38C-EN...
- Page 15 Unit Dimensions Figure 10. 8½ to 10 tons standard efficiency—unit clearance and roof opening Note: All dimensions are in inches/millimeters. RT-SVX38C-EN...
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Page 16: Installation
Adjust as necessary for even unit lift. Other lifting arrangements could cause equipment or property damage. Failure to follow instructions above or properly lift unit could result in unit dropping and possibly crushing operator/ technician which could result in death or serious injury. RT-SVX38C-EN... -
Page 17: Foundation
(b) Net weight should be added to unit weight when ordering factory-installed accessories. Foundation Horizontal Units If the unit is installed at ground level, elevate it above the snow line. Provide concrete footings at each support location with a “full perimeter” support structure or a slab RT-SVX38C-EN... -
Page 18: Roof Curb
Do not cut out the entire roof deck within the curb perimeter. If Curb Accessory Kit Not Used • The ductwork can be attached directly to the factory-provided flanges around the unit’s supply and RT-SVX38C-EN... -
Page 19: General Unit Requirements
Note: The following units require a limit switch change out for horizontal discharge. The additional limit Remove 2 metal runners switch is shipped attached to the combustion and 3 wooden boards blower housing: YSC060ED*H, YSC072ED*H, YSC090ED*H, YSC102ED*H, YSC120ED*H. RT-SVX38C-EN... -
Page 20: Horizontal Discharge Conversion (5 Ton Units)
2 screws. 5. Slide RETURN DUCT COVER (insulation side up) into supply opening until inward edge of duct cover engages with the 2 retaining clips on the duct flange. Secure outward edge of the duct cover with two screws. RT-SVX38C-EN... -
Page 21: Horizontal Discharge Conversion (6 To 10 Ton Units)
Note: If unit is equipped with Return Air Smoke Detector, refer to field conversion instructions for horizontal discharge before installing return air duct. Note: If unit is equipped with Discharge Air Sensing option refer to the following figure for proper tube positioning based on unit tonnage. RT-SVX38C-EN... -
Page 22: Requirements For Gas Heat
To Convert Drain Condensate through Front of Unit 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°. RT-SVX38C-EN... -
Page 23: Filter Installation
An overall dimensional layout for the field-installed wiring entrance into the unit is illustrated in “Unit Dimensions, ” 10. To ensure that the unit’s supply power wiring is properly sized and installed, use the following guidelines. RT-SVX38C-EN... -
Page 24: Control Power Transformer
611 to 970 feet 14 gauge 3 ohms/conductor for the length of the run. 186.2 - 295.7 m 2.0 mm2 Note: Resistance in excess of 3 ohms per conductor may cause component failure due to insufficient AC voltage supply. RT-SVX38C-EN... -
Page 25: Space Temperature Averaging (Reliatel™ Only)
Example #2 illustrates three sensors squared in a series/parallel circuit. Using BAYSENS077*, two sensors are required to accomplish space temperature averaging. • Example #3 illustrates the circuit required for this sensor. Table 6, p. 28 lists the temperature versus resistance coefficient for all sensors. RT-SVX38C-EN... - Page 26 Installation Figure 28. Examples RT-SVX38C-EN...
- Page 27 Installation Figure 29. Typical field wiring diagrams for optional controls (ReliaTel™ only) BAYSENS075* BAYSENS075* BAYSENS108* BAYSENS106* BAYSENS110* BAYSENS119* BAYSENS073* BAYSENS074* BAYSENS075* ASYSTAT669A OPTIONAL REMOTE SENSOR RT-SVX38C-EN...
- Page 28 ½" ¾" 1" 1¼" 1½" Length of Pipe (ft) Pipe Pipe Pipe Pipe Pipe 1220 Note: Capacity of pipe of different diameters and lengths in cu. ft. per hr. with pressure drop of 0.3" and specific gravity of 0.60 RT-SVX38C-EN...
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Page 29: Pre-Start
Measure each leg (phase-to-phase) of the power supply. factory-mounted disconnect switch as follows: Each reading must fall within the utilization range stamped Black (phase A) to L1 on the unit nameplate. If any of the readings do not fall Red (phase B) to L2 RT-SVX38C-EN... - Page 30 Before starting the unit in the “Cooling” mode, set the system switch to the OFF position and turn the main power disconnect to the ON position and allow the crankcase heater to operate a minimum of 8 hours. RT-SVX38C-EN...
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Page 31: Test Modes
The unit will start the first test step and change to the next step every 30 seconds. At the end of the test mode, control of the unit will automatically revert to the applied “System” control method. RT-SVX38C-EN... -
Page 32: Unit Start-Up
To increase fan rpm: Loosen the pulley adjustment set next component start-up procedure. Remove electro screw and turn sheave clockwise. mechanical test mode connections (if applicable). • To decrease fan rpm: Loosen the pulley adjustment set screw and turn sheave counterclockwise. RT-SVX38C-EN... -
Page 33: Compressor Start-Up
When starting the unit for the first time or servicing the heaters, it is a good practice to start the heater with the main gas supply turned off. Once the ignition system and components have been checked, open the main power disconnect switch to reset the unit. RT-SVX38C-EN... -
Page 34: Maintenance
Table 10. If the necessary. Refer to the unit Service Facts for filter “force” reading is outside the range, readjust the belt information. tension. Note: Actual belt deflection “force” must not exceed the maximum “force” value shown in Table RT-SVX38C-EN... -
Page 35: Cooling Season
2. Protect all electrical devices such as motors and replace them. controllers from any over spray. • Check supply fan motor bearings; repair or replace the 3. Straighten any bent coil fins with a fin comb. motor as necessary. RT-SVX38C-EN... -
Page 36: Annual Maintenance
Note: Secure hail guard latches. Figure 32. Slide latch Slide Latch Detail A Pull down to disengage guard 2. Restore the unit to its operational status and check system operation. RT-SVX38C-EN... -
Page 37: Final Process
- ok - low - low - ok - ok - low - low - ok - ok - low - low Note: Check and record the data requested above each month during the cooling season with the unit running. RT-SVX38C-EN... -
Page 38: Troubleshooting
32 VDC. If no voltage is you may leave the system in that mode for up to one present, a system failure has occurred. Refer to Step 4 in hour while troubleshooting. Refer to the sequence of RT-SVX38C-EN... - Page 39 OFF position. After approximately 30 seconds, turn the “Mode” System Failure selection switch to the desired mode, e.g., Heat, Cool, or • Measure the voltage between terminals J6-9 and J6-6. Auto. • Normal operation = approximately 32 VDC RT-SVX38C-EN...
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Page 40: Zone Temperature Sensor (Zts) Service Indicator
The LED should have at system. least 100 times more resistance in reverse direction, as compared with the forward direction. If high resistance in both directions, LED is open. If low in both directions, LED is shorted. RT-SVX38C-EN... -
Page 41: Unit Economizer Control (Eca) Troubleshooting
CC1 and CC2 coils, and any of the controls below that apply to the unit (HPC1, HPC2, LPC1, LPC2, Frostat™). 1. Open and lock the unit disconnect switch. 2. Remove the Outside Air Sensor (OAS) from the condenser section of unit. RT-SVX38C-EN... -
Page 42: Resetting Cooling And Ignition Lockouts
After approximately 30 seconds, turn the “Mode” selection switch to the desired mode,e.g., Heat, Cool, or Auto. Resetting Lockouts—Method 2 To reset the system at the unit, cycle the unit power by turning the disconnect switch to OFF and then to ON. RT-SVX38C-EN... -
Page 43: Unit Wiring Diagrams Numbers
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 4366-1042-0110 4366-1034-0110 4366-1532-0110 120EDR 4366-2231-0110 4366-2230-0110 4366-2236-0110 060EDK 4366-2231-0110 4366-2230-0110 4366-2236-0110 072EDK 4366-2231-0110 4366-2230-0110 4366-2236-0110 090EDK 4366-2231-0110 4366-2230-0110 4366-2236-0110 102EDK 4366-2231-0110 4366-2230-0110 4366-2236-0110 120EDK RT-SVX38C-EN... -
Page 44: Limited Warranty
Models Less Than 20 Tons for Residential Use* rights, and you may also have other rights which vary from This limited warranty is extended by Trane to the original state to state. purchaser and to any succeeding owner of the real... - Page 48 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 right to change design and specifications without notice. © 2015 Trane All rights reserved...