Table of Contents
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Installation, Operation,
and Maintenance
Packaged Rooftop Air Conditioners
Precedent™ — Heat Pump
5 – 10 Tons – 50 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 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
WSC060ED - WSC120ED
SAFETY WARNING
RT-SVX39B-EN
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Related Manuals for Trane Precedent WSC060ED
Summary of Contents for Trane Precedent WSC060ED
- Page 1 Installation, Operation, and Maintenance Packaged Rooftop Air Conditioners Precedent™ — Heat Pump 5 – 10 Tons – 50 Hz Model Numbers WSC060ED - WSC120ED 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.
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Page 2: Warnings, Cautions And Notices
Carbon (HCFCs). Not all refrigerants containing these Revision Summary compounds have the same potential impact to the RT-SVX39B-EN (11 September 2012) environment. Trane advocates the responsible handling of all refrigerants-including industry replacements for CFCs • MERV 8 filter with filter removal tool such as HCFCs and HFCs. -
Page 3: Table Of Contents
ReliaTel Controls ....29 RTCI - ReliaTel™ Trane Communication Inter- face (Optional) ..... . 7 Start-Up . - Page 4 Table of Contents Programmable & Digital Zone Sensor Test ......39 Unit Economizer Control (ECA) Trouble- shooting ReliaTel Control ... . 40 Wiring Diagrams .
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Page 5: Model Number Description
Economizer, Dry Bulb 0-100% Options and Condensate Drain Pan Overflow without Barometric Relief Switch No Communications Interface Economizer, Dry Bulb 0-100% Trane Communications Interface Digit 26 - System Monitoring with Barometric Relief LonTalk® Communications Interface Economizer, Reference Enthalpy Controls BACnet™ Communications Interface... -
Page 6: Model Number Notes
Model Number Description Model Number Notes sensor is a field-installed only option. 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. -
Page 7: General Information
General Information Unit Nameplate RTCI - ReliaTel™ Trane Communication Interface (Optional) A Mylar unit nameplate is located on the unit’s corner This module is used when the application calls for an support next to the filter access panel. It includes the unit ICSTM building management type control system. - Page 8 General Information Supply Fan Failure Input (Optional) immediately turned “Off” . The compressor will not be allowed to restart for a minimum of 3 minutes should the The Fan Failure Switch can be connected to sense indoor contacts close. fan operation: If four consecutive open conditions occur during the first FFS (Fan Failure Switch) If air flow through the unit is not three minutes of operation, the compressor for that circuit...
- Page 9 These devices and timed override with override cancellation. It is used protect motors and compressors against problems caused with a Trane Integrated Comfort™ building management by phase loss, phase imbalance, and phase reversal system. indication.
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Page 10: Unit Clearances
Unit Clearances Figure 1. Typical installation clearances for single & multiple unit applications WSC072-120E units WSC060E unit RT-SVX39B-EN... - Page 11 Unit Clearances Figure 2. Heat pump - 5 ton Note: All dimensions are in inches/millimeters. Figure 3. Heat pump - 5 ton - unit clearance and roof opening Note: All dimensions are in inches/millimeters. CLEARANCE 36” (914 MM) RT-SVX39B-EN...
- Page 12 Unit Clearances Figure 4. Heat pump - 5 ton - roof curb Note: All dimensions are in inches/millimeters. Figure 5. Heat pumps - 6-7½ tons Note: All dimensions are in inches/millimeters. RT-SVX39B-EN...
- Page 13 Unit Clearances Figure 6. Heat pump - 10 ton Note: All dimensions are in inches/millimeters. Figure 7. Heat pump - 6-10 ton - unit clearance and roof opening Note: All dimensions are in inches/millimeters. RT-SVX39B-EN...
- Page 14 Unit Clearances Figure 8. Heat pump - 6-10 ton - roof curb Note: All dimensions are in inches/millimeters. (356 MM) (2130 MM) RT-SVX39B-EN...
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Page 15: Pre-Installation
Pre-Installation Unit Inspection provide reasonable evidence that the damage did not occur after delivery. As soon as the unit arrives at the job site • Notify the appropriate sales representative before • Verify that the nameplate data matches the data on the installing or repairing a damaged unit. -
Page 16: Installation
Installation Figure 9. Corner weights WARNING Heavy Objects! Do not use cables (chains or slings) except as shown. Each of the cables (chains or slings) used to lift the unit must be capable of supporting the entire weight of the unit. -
Page 17: Foundation
Installation Foundation Horizontal Units If the unit is installed at ground level, elevate it above the Figure 11. Heat pump - 5 ton - horizontal airflow snow line. Provide concrete footings at each support supply/return location with a “full perimeter” support structure or a slab Note: All dimensions are in inches/millimeters. -
Page 18: Roof Curb
Installation Downflow Units WARNING Figure 13. Heat pump - 5 ton - downflow airflow Combustible Materials! supply/return - through the base utilities Note: All dimensions are in inches/millimeters. Maintain proper clearance between the unit heat exchanger, vent surfaces and combustible materials. Refer to unit nameplate and installation instructions for 3 5/8”... -
Page 19: General Unit Requirements
Installation 3. Rig the unit as shown in Figure 10, p. 16. Attach adequate strength lifting slings to all four lifting WARNING brackets in the unit base rail. Do not use cables, chains, Heavy Objects! or slings except as shown. Do not use cables (chains or slings) except as shown. -
Page 20: Factory Installed Economizer
Installation • Install and connect a condensate drain line to the 5. Slide RETURN DUCT COVER (insulation side up) into evaporator drain connection. supply opening until inward edge of duct cover engages with the 2 retaining clips on the duct flange. Note: Condensate Overflow Switch will not work if unit is Secure outward edge of the duct cover with two not level, or slightly sloped toward switch. -
Page 21: Low Voltage Wiring (Ac & Dc) Requirements
Installation 5. Replace the front support panel by aligning the panel Figure 20. Duct cover with tabs in the raceway. Align the condensate drain pan support in the grommeted hole as the panel is put in place. 6. Replace evaporator access panel and supply air access panels. -
Page 22: Filter Installation
Installation Drain Pan Removal (Units with Condensate Main Unit Power Standard Wiring Overflow Switch Option) 1. Location of the applicable electrical service entrance is Before drain pan removal, the switch wire must be illustrated in “Unit Clearances, ” p. 10. Complete the disconnected from wire tie on panel and/or any tape unit’s power wiring connections at Compressor before drain pan can be removed. -
Page 23: Controls Using 24 Vac
Installation Control Power Transformer Note: Resistance in excess of 2.5 ohms per conductor can cause deviations in the accuracy of the controls. The 24 volt control power transformers are to be used only 2. Ensure that the wiring between controls and the unit’s with the accessories called out in this manual. - Page 24 Installation Figure 24. ReliaTel refrigeration module Figure 25. Customer control low voltage routing RT-SVX39B-EN...
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Page 25: Pre-Start
Pre-Start Space Temperature Averaging (ReliaTel™ two sensors in each circuit wired in parallel. The square of any number of remote sensors is required. Example #2 only) illustrates three sensors squared in a series/parallel circuit. Space temperature averaging is accomplished by wiring a Using BAYSENS077*, two sensors are required to number of remote sensors in a series/parallel circuit. - Page 26 Pre-Start Figure 27. Typical field wiring diagrams for optional controls BAYSENS077* ASYSTAT111* BAYSENS107* BAYSENS119* ASYSTAT777* Zone Sensor BAYSENS077* ASYSTAT111* BAYSENS073* Zone Sensor BAYSENS109* BAYSENS119* ASYSTAT777* BAYSENS074* Zone Sensor BAYSENS109* RT-SVX39B-EN...
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Page 27: Voltage Imbalance
Pre-Start refer to the maintenance section of this manual for instructions. Table 5. Temperature versus resistance (temperature vs. resistance is negative) • Verify that a condensate trap is installed and the piping Temperature is properly sized and pitched. Nominal • Verify that the correct size and number of filters are in Degrees F°... -
Page 28: Compressor Crankcase Heaters
Pre-Start Proper electrical supply phasing can be quickly damage compressor bearings due to reduced lubrication determined and corrected before starting the unit by using and could cause compressor mechanical failures. an instrument such as an Associated Research Model 45 Before starting the unit in the “Cooling” mode, set the Phase Sequence Indicator and following the steps below: system switch to the “Off”... -
Page 29: Reliatel Controls
Pre-Start For the initial start-up of the unit, this method allows the technician to cycle a component “On” and have up to one hour to complete the check. 2. Resistance Test Mode - This method can be used for start-up providing a decade box for variable resistance outputs is available. -
Page 30: Start-Up
Start-Up Table 6. Service test guide for component operation Test Step Mode Econ Comp1 Comp 2 Heat 1 Heat 2 Ohms Minimum Position 2.2K Setpoint 0% Minimum Ventilation Selectable Economizer Test Open 3.3K Open Cool Stage 1 Minimum Position 4.7K Cool Stage 2 Minimum Position 6.8K... -
Page 31: Economizer Start-Up Reliatel Control
Start-Up Economizer Start-Up ReliaTel Scroll Compressors a. Once each compressor has started, verify that the Control rotation is correct. If a scroll compressor is rotating backwards, it will not pump and a loud rattling sound can be observed. WARNING b. If the electrical phasing is correct, before Rotating Components! condemning a compressor, interchange any two During installation, testing, servicing and... -
Page 32: Fan Belt Adjustment - Belt Drive Units
Start-Up available stages of cooling & heating), perform these final a. Measure the center-to-center shaft distance (in checks before leaving the unit: inches) between the fan and motor sheaves. • Program the Night Setback (NSB) panel (if applicable) b. Divide the distance measured in Step 1a by 64; the for proper unoccupied operation. -
Page 33: Filters
Start-Up Table 7. Belt tension measurement and deflection ranges Deflection Force (Lbs.) Belts Cross Small P.D Steel Cable Section Range Super Gripbelts Gripnotch Gripbelts Min. Max. Min. Max. Min. 3.0 - 3.6 4 1/2 3 7/8 5 1/2 3 1/4 3.8 - 4.8 3 1/2 4 1/2...