Page 2 - Warnings and Cautions; can; may; CAUTION; WARNING
©American Standard Inc. 2000 SCXG-SVX01B-EN GeneralInformation About This ManualLiterature Change History Use this manual for commercial self-contained models SCWG, SIWG, SCRG,and SIRG. This is the original issue of thismanual. It provides specific installation,owner maintenance, and diagnostictroub...
Page 3 - Contents; Installation; Programming; Owner
SCXG-SVX01B-EN 3 Contents Cross reference to related publications/information:IntelliPak ® Self-Contained Programming Guide, PKG-SVP01B-EN Remote Air-Cool-Condenser Installation, Owner, and Diagnostic Manual, CXRC-SVX01A-EN Installation General InformationPre-installation ConsiderationsDimensions/We...
Page 5 - IntelliPak; Unit Nameplate
SCXG-SVX01B-EN 5 Installation Control OptionsUnits can have either a thermostatcontrol or IntelliPak ® UCM control network. IntelliPak ® Unit Controls Standard controls supplied with theIntelliPak ® unit include the human interface (HI) panel with unit controlmodule (UCM), hi/lo inlet air temperatur...
Page 6 - S C W G N 20 4 2 BO A B 2 10 065 B A 1 0 1 0 A A C F A 1 1 0 T 2 0; Model Number Description
6 SCXG-SVX01B-EN Installation GeneralInformation S C W G N 20 4 2 BO A B 2 10 065 B A 1 0 1 0 A A C F A 1 1 0 T 2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Model Number Description Each self-contained unit has a multiple character model numb...
Page 7 - AO; Self-Contained Ship-With Accessory Model Number Description
SCXG-SVX01B-EN 7 P S W G S A 1 1 0 AO 1 2 3 4 5 6 7 8 9 10 11 Self-Contained Ship-With Accessory Model Number Description Installation GeneralInformation F = B and CG = A, B and C0 = None Digit 26 - Drain Pan TypeA = Galvanized SlopedB = Stainless Steel Sloped Digit 27 - Waterside EconomizerA = Mech...
Page 8 - “After-Shipment” Accessory Model Number; S C W F N 20 4 2 AO A B 2 10 065 B A 1 0 1 0 A A C F A 1 1 0 T 2 0
8 SCXG-SVX01B-EN Installation “After-Shipment” Accessory Model Number S C W F N 20 4 2 AO A B 2 10 065 B A 1 0 1 0 A A C F A 1 1 0 T 2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Digit 1 - Parts/AccessoriesP = Parts/Accessories Digit 2 - Unit ...
Page 9 - Receiving and Handling; Inspect the unit for concealed
SCXG-SVX01B-EN 9 Installation Receiving and Handling Shipping PackageCommercial self-contained units shipassembled on skids with protectivecoverings over the coil and dischargeopenings. Figure I-PC-1 illustrates atypical shipping package. Ship-Separate AccessoriesField-installed sensors ship separat...
Page 10 - Installation Preparation
10 SCXG-SVX01B-EN Installation Pre-InstallationConsiderations Installation Preparation Before installing the unit, performthe following procedures toensure proper unit operation. 1. Verify the floor or foundation is level. Shim or repair as necessary. To ensureproper unit operation, install the unit...
Page 11 - Service Access
SCXG-SVX01B-EN 11 denser and fan motor access panels aresecured with quick-acting fasteners.Access panels for evaporator coils,expansion and water valves, and left fanbearing are sheet metal screws. Accessto other components for service requiresremoval of panels secured with sheetmetal screws. Durin...
Page 12 - Rigging and Unit Handling
12 SCXG-SVX01B-EN Figure I-PC-6. Split-apart unit gravity block location. Figure I-PC-5. Assembled unit gravity block location. Table I-PC-2. Gravity Block Dimensions Model A B C D SXWG 36 14 38 12 SXRG 36 16 40 12 Rigging and Unit Handling Before lifting the unit or modularcomponent, determine the ...
Page 13 - Rigging and Handling; Fan Section
SCXG-SVX01B-EN 13 Pre-InstallationConsiderations Rigging and Handling Unit Shipping1. Position rigging sling under wood shipping skid. 2. Use spreader bars to avoid unit damage. 3. When using a forklift, exercise caution to prevent unit damage. 4. Use the standard fork length to lift one end and dra...
Page 14 - Split-Apart Unit Assembly
14 SCXG-SVX01B-EN Split-Apart Unit Assembly 1. Ensure the tagging information on the fan section nameplate matches that onthe compressor nameplate. 2. Remove the connector brackets holding the the sheet metal shipping cover oncompressor section. Retain bracketsand screws. 3. Remove shipping cover fr...
Page 22 - Hot Water Coil
22 SCXG-SVX01B-EN Dimensionsand Weights Installation Hot Water Coil Hot Water Coil Dimensions - English - (inches) Unit Ton A B C D E F G H J 20 - 35 37 1 / 4 53 3 / 4 16 5 / 8 73 1 / 2 14 7 / 8 16 1 / 4 43 1 / 4 5 5 / 8 7 3 / 4 Hot Water Coil Dimensions - Metric (mm) Unit Ton A B C D E F G H J 20 -...
Page 23 - Steam Coil
SCXG-SVX01B-EN 23 Dimensionsand Weights Installation Steam Coil Dimensions - English - (inches) Unit Ton A B C D E K L M N P Q R 20 - 35 37 1 / 4 53 3 / 4 16 5 / 8 73 1 / 2 10 7 / 8 22 1 / 2 3 3 / 8 15 7 / 8 1 41 9 3 / 8 4 3 / 8 Steam Coil Dimensions - Metric (mm) Unit Ton A B C D E K L M N P Q R 20...
Page 24 - Electric Heat Coil
24 SCXG-SVX01B-EN Dimensionsand Weights Installation Electric Heat Coil
Page 25 - Waterside Economizer
SCXG-SVX01B-EN 25 Dimensionsand Weights Installation Waterside Economizer
Page 28 - Variable Frequency Drive
28 SCXG-SVX01B-EN Dimensionsand Weights Installation Variable Frequency Drive Variable Frequency Drive Dimensions - English - (inches) Motor HP Voltage A B C D E F G H J K Weight 7.5 200V 9 1 / 2 8 1 / 2 12 3 / 4 1 / 4 12 1 / 4 1 / 4 8 1 / 4 1 / 4 26 lbs. 7.5 460V 6 7 / 8 3 / 8 6 1 / 8 3 / 8 11 1 / ...
Page 33 - Duct Connections; three inches
SCXG-SVX01B-EN 33 MechanicalRequirements Duct Connections Disconnect electrical powersource before servicing the unit.Failure to do so may result ininjury or death from electricalshock or entanglement in movingparts. Return air enters the rear of the unit andconditioned supply air dischargesthrough ...
Page 34 - Water Piping
34 SCXG-SVX01B-EN MechanicalRequirements Water Piping Note: To prevent water damage, install allpiping drain and vent plugs. Condenser ConnectionsCondenser water piping knockouts are inthe lower left end panel. If necessary,remove insulation to gain access. All fieldinstalled piping must conform toa...
Page 37 - not
SCXG-SVX01B-EN 37 ElectricalRequirements Unit Wiring Diagrams Specific unit wiring diagrams areprovided on the inside of the controlpanel door. Use these diagrams forconnections or trouble analysis. Supply Power Wiring It is the installer’s responsibility to providepower supply wiring to the unit te...
Page 38 - Selection Procedures
38 SCXG-SVX01B-EN ElectricalRequirements Selection Procedures RLA = Rated Load AmpsCompressor LRA = Locked Rotor AmpsFan Motor LRA = Locked Rotor Amps,N.E.C. Table 430 - 150FLA = Full Load Amps, N.E.C. Table 430 - 150 Voltage utilization range is ±10 percent Determination of minimum circuitampacity ...
Page 39 - Pre-Startup Procedures
SCXG-SVX01B-EN 39 Pre-StartupRequirements Pre-Startup Procedures Before starting up units perform thefollowing procedures to ensure properunit operation. Unit Protective CoversRemove the shipping protectioncoverings from the human interfacepanel (HI) at the control panel, the filterbox (or air inlet...
Page 40 - Unit Vibration Isolator Option
40 SCXG-SVX01B-EN Unit Vibration Isolator Option Vibration isolation is not necessary for theunit since the factory internally isolatesthe fan and compressors, thus creatingdouble isolation. The Trane Companystrongly recommends that you consult avibration specialist when consideringdouble isolation....
Page 41 - Plenum
SCXG-SVX01B-EN 41 Pre-StartupRequirements Plenum Before installing the plenum attach theinsulation strip that ships with the plenum.See Figure I-PR-4 for proper insulationlocation. Align the plenum front with thecontrol panel side of the unit. Using thestrips and screws provided, secure theplenum to...
Page 45 - Hydronic Coil Installation
SCXG-SVX01B-EN 45 Pre-StartupRequirements Installation Hydronic Coil Installation These instructions are for steam and hotwater coil installation. The hydronic coilassembly has a full coil, piping, a modu-lating temperature control valve, and adisc temperature limit device located inthe unit near th...
Page 46 - Electric Heat Installation
46 SCXG-SVX01B-EN Disconnect electrical powersource before wiring electric heatto unit to prevent risk of injury ordeath from electrical shock. 2. Punch out the appropriate knockouts in the electric heater control box and onthe unit’s left side panel. Run the wiresdown the side of the unit from theh...
Page 47 - must
SCXG-SVX01B-EN 47 Variable Frequency DriveOption (VFD) The variable frequency drive (VFD)option can only be used with IntelliPakunits. The VFD and VFD w/bypass isavailable from 7.5 to 25 hp and is aSquare D model Altivar 58. All VFDs arepre-configured and run-tested at thefactory prior to shipping. ...
Page 48 - Airside Economizer Installation; Unit Installation; Cabinets with TRAQTM dampers
48 SCXG-SVX01B-EN Pre-StartupRequirements Airside Economizer Installation Unit Handling1. Hoist the damper cabinet to the installation location with strapspositioned under the skid as shown inFigure I-PR-12. Use spreader bars toprevent unit damage during lifting. 2. With the damper cabinet at its fi...
Page 53 - Zone Sensor Installation; Wiring
SCXG-SVX01B-EN 53 Note: Guidelines for wire sizes andlengths are shown in Table I-PR-7. The totalresistance of these low voltage wiresmust not exceed 2.5 ohms per conductor.Any resistance greater than 2.5 ohms maycause the control to malfunction due toexcessive voltage drop. Note: Do not run low-vol...
Page 57 - Time Clock Option
SCXG-SVX01B-EN 57 Pre-StartupRequirements Time Clock Option The time clock option has aprogrammable timer that is factory wiredto the unoccupied input to provide on/offcontrol. The time clock will not allow theunit to pass through the night setback/morning warmup mode, except on unitswith optional n...
Page 61 - Do not
SCXG-SVX01B-EN 61 Wiring the Remote HumanInterface The remote human interface requires 24VAC + 4 volts power source and ashielded twisted pair communication linkbetween the remote panel and theinterprocessor communication bridge(ICPB) module at the self-contained unit. Field wiring for both the low ...
Page 62 - Connecting to Tracer Summit; Communication Wiring
62 SCXG-SVX01B-EN Connecting to Tracer Summit ® IntelliPak ® self-contained units operate with Trane building automation software,Tracer Summit ® version 10.0.4 or later or any OS2 operating system. Tape the non-insulated end of theshield on shielded wire at theunit. Any connection between theshield...
Page 63 - Pre-Startup Checklist
SCXG-SVX01B-EN 63 Pre-StartupRequirements Installation Pre-Startup Checklist Complete this checklist after installing theunit to verify all recommendedinstallation procedures are completebefore unit start-up. This does not replacethe detailed instructions in theappropriate sections of this manual.Al...
Page 66 - Program Menu; Keypad Operation
66 SCXG-SVX01B-EN to the program menu. See Figure I-P-2.Before toggling to the program menu,use the mode button to select the typesetpoints to review or program (heat,cool or auto). For example, if you selectcool mode before toggling to the programmenu, then only the cool setpoints arereviewed or pr...
Page 70 - Intelligent Copy
70 SCXG-SVX01B-EN Programming Installation Table I-P-2. Zone Sensor BAYSENS020 Option Menu Settings. Option # Description Value Factory Setting 1 Morning Warmup 0 = Disabled 0 1 = Enabled 2 Economizer minimum 0 = Disabled 1 Position override 1 = Enabled 3 Temperature Scale 0 = Fahrenheit 0 1 = Enabl...
Page 71 - Icon Descriptions
SCXG-SVX01B-EN 71 Programming Installation Icon Descriptions BAYSENS019 Icon DescriptionsRefer to Figure I-P-9 for a pictorial view ofthe written descriptions below.1. The four periods of the day used only during programming mode. 2. The seven days of the week used during programming and in normalmo...
Page 74 - Unit Startup Procedures; Unit Startup; Startup
74 SCXG-SVX01B-EN Unit Startup Procedures 1. Check all electrical connections for tightness. 2. For water-cooled units: gain access to the liquid line service valves in the unit’sleft lower section. Note: Verify the liquid line service valve isopen at unit start-up. Each compressorsuction line conta...
Page 75 - Startup Log
SCXG-SVX01B-EN 75 Installation Startup Log Complete this log at unit start-up. Unit: ____________________________ Unit Location: _________________________________________ Unit Voltage: __________ __________ __________ A B C Evaporator: Evaporator fan motor horsepower: __________ Evaporator fan motor...
Page 77 - Points List
SCXG-SVX01B-EN 77 Owner GeneralInformation Points List RTM Module: Binary inputs• Emergency stop• External auto/stop• Unoccupied/occupied• Dirty filter• VAV changeover with hydronic heat Binary outputs• VAV box drive max (VAV units only)• CV unoccupied mode indicator (CV units only) • Alarm• Fan run...
Page 78 - Unit Control Components
78 SCXG-SVX01B-EN Unit Control Components The Modular Series IntelliPak ® self- contained unit is controlled by amicroelectronic control system thatconsists of a network of modules. Thesemodules are referred to as unit controlmodules (UCM). In this manual, theacronym UCM refers to the entire control...
Page 80 - Heat Module
80 SCXG-SVX01B-EN Compressor Module (SCM andMCM - Standard on All Units The compressor module, (single circuitand multiple circuit) energizes theappropriate compressors and condenserfans upon receiving a request formechanical cooling. It monitors thecompressor operation through feedbackinformation i...
Page 84 - Waterside Components
84 SCXG-SVX01B-EN temperature is less than 58 F (15 C). Thisoption allows the compressor to operatewith entering fluid temperature down to35 F (2 C). The minimum valve position tomaintain minimum condenser flow ratesis user-defined at the HI. This valve drivesclosed if the unit shuts down or if a po...
Page 86 - Unit Airside Components
86 SCXG-SVX01B-EN Owner Unit Airside Components The unit’s air delivery system consists ofcondensers, dampers, enthalpy switchoption, airside economizer option, filters,low ambient sensors, and factorymounted single or double wall plenums. Supply Air FanThe unit has a single supply fan that runsat a...
Page 87 - Airside Economizers with Traq; Damper
SCXG-SVX01B-EN 87 Owner mode at the HI panel. When in bypassmode, VAV boxes need to be fully open.The self-contained unit will controlheating and cooling functions to maintainsetpoint from a user-defined zone sensor.Supply air static pressure limit is active inthis mode. For more detailed informatio...
Page 91 - Tracer Summit; Unoccupied
SCXG-SVX01B-EN 91 Owner Control Sequences ofOperation Occupied/Unoccupied SwitchingThere are four ways to switch occupied/unoccupied:(1) Night setback zone sensor(2) Field-supplied contact closure (hardwired binary input to RTM) (3) Tracer Summit ® (4) Factory-mounted time clock Field Supplied Occup...
Page 93 - Zone Temperature Control
SCXG-SVX01B-EN 93 Owner Sequence ofOperation Occupied Sequence OfOperation All setpoints can be adjusted using the HIpanel. Also, cooling/heating setpoints canbe adjusted in the zone, if using one of thezone sensor options (BAYSENS020,BAYSENS021, BAYSENS008,BAYSENS010, BAYSENS019, orBAYSENS014). For...
Page 95 - Compressors
SCXG-SVX01B-EN 95 Table O-SO-1. Compressor Stages. Unit Refrigerant Compressor HP Standard Lead/Lag SCM Size Circuit Type by Stage Compressor Compressor or Model # Digit 5 A B Staging Staging MC SXWG 20, 25 Independent 10 10 B/AB A/AB MCM SXRG 20SXWG 30 Independent 15 10 B/A/AB A/AB MCM SXRG 25SXWG ...
Page 98 - Maintenance Procedures
98 SCXG-SVX01B-EN Maintenance Procedures Air FiltersFilter access doors are on the same sideof the unit as the water pipingconnections. To replace throwawayfilters, remove the dirty elements andinstall new filters with the filter’sdirectional arrows pointing toward thefan. Verify that no air bypasse...
Page 100 - Fan Belt Tension
100 SCXG-SVX01B-EN Figure O-M-2. Fan Belt Adjustment. Figure O-M-3. Belt Tension Gauge. Fan BearingsThe opposite drive end bearing is aspecial bearing with close tolerance fit ofballs and races. Replace this bearing withthe same part number as the originalbearing. Fan Belt Tension Note: Check fan be...
Page 102 - Maintenance; Refrigerant System
102 SCXG-SVX01B-EN Follow specific manufacturer’sguidelines for conversion of existingsystems. • To assist in reducing power generation emissions, always attempt to improveequipment performance with improvedmaintenance and operations that willhelp conserve energy resources. WARNING: Do not work in a...
Page 103 - Refrigerant Leak Testing
SCXG-SVX01B-EN 103 refrigerant service work such asgauges, hoses, vacuum pumps, andrecycling equipment. • Stay aware of unit enhancements, conversion refrigerants, compatibleparts, and manufacturer’srecommendations that will reducerefrigerant emissions and increaseequipment operating efficiencies.Fo...
Page 106 - Inlet Guide Vanes
106 SCXG-SVX01B-EN Inlet Guide Vanes Perform the following procedure everysix months for proper inlet guide vaneoperation:1. Spray all parts of guide vane assembly with WD40. 2. Spray all steel parts of guide vane assembly with ZRC. 3. Spray hubs and moving parts with dry silicone lubricant (Mobil M...
Page 107 - Coil Fin and External Cleaning; Draining the Coil
SCXG-SVX01B-EN 107 Coil Fin and External Cleaning Keep coils clean to maintain maximumperformance. For operation at its highestefficiency, clean the refrigerant coil oftenduring periods of high cooling demand orwhen dirty conditions prevail. Clean thecoil a minimum of once per year toprevent dirt bu...
Page 108 - Cleaning the Condenser
108 SCXG-SVX01B-EN Maintenance Also, a drain plug is at the bottom of theinlet condenser manifold and in the outletpipe near the unit’s left side. Removethese plugs to drain the condensers. Besure to open the vent plugs at the top ofthe condenser inlet and outlet manifold.See Figure O-M-7 on page 10...
Page 109 - Piping Components
SCXG-SVX01B-EN 109 Piping Components Water ValvesWater valves have a stern packing nut. Ifthere is evidence of water leakage at thevalve stem, proceed as follows:1. Remove actuator motor from support plate. (Remove four mount bolts) 2. Remove shaft coupling.3. Torque the packing nut to 10-ft.-lbs. o...
Page 111 - System Checks; Troubleshooting
SCXG-SVX01B-EN 111 Table D-T-1. Common Unit Problems and Solutions Problem Possible Cause Remedy Drain pan is overflowing Plugged drain line Clean drain line Unit not level Level unit Standing water in drain pan Unit not level Level unit Plugged drain line Clean drain line Wet interior insulation Co...
Page 112 - CO; Diagnostics; Condenser Temp Sensor Failure - Circuit
112 SCXG-SVX01B-EN DiagnosticTroubleshooting Diagnostics Refer to the IntelliPak ® Self-Contained Programming Guide, PKG-SVP01B-EN,for specific unit programming andtroubleshooting information. In particular,reference the “Service Mode Menu” and“Diagnostic Menu” sections in theprogramming guide. Refe...
Page 116 - RTM Zone Sensor Failure
116 SCXG-SVX01B-EN DiagnosticTroubleshooting Diagnostics its allowable range continuously for 10seconds. RTM Aux. Temp. Sensor FailureProblem: The RTM auxillary temperaturesensor data is out of range. Check: Sensor resistance should bebetween 830 ohms (200 F)and 345.7Kohms (-40 F). If so, check fiel...
Page 120 - Index
120 SCXG-SVX01B-EN Index A “After-Shipment” Accessory Model Number 8 Air Filters 98Air-Cooled Condensers 88Airside Economizer Installation 48Airside Economizer Interface 88Airside Economizer Interface with Comparative Enth 88 Airside Economizer Option 87Airside Economizers with Traq Damper 8 7 Ambie...
