Trane SCWG 020, SCWG 025, SCWG 030, SCWG 035, SWG 020, SWG 025, SWG 030, SWG 035, SCRG 020, SCRG 025, SCRG 032, SRG 020, SCRG 025, SCRG 032 manuale d’uso

Installation, Owner , and Diagnostic Manual July 2000 SCXG-SVX01B-EN IntelliPak ® Commercial Self-Contained Modular Ser ies, 20-35 T on Models “BO” and later Design Sequence SCWG -020, -025, -030, -035 SIWG -020, -025, -030, -035 SCRG -020, -025, -032 SIRG -020, -025, -032[...]

©American Standard Inc. 2000 SCXG-SVX01B-EN General Information About This Manual Literature Change History Use this manual for commercial self- contained models SCWG, SIWG, SCRG, and SIRG. This is the original issue of this manual. It provides specific installation, owner maintenance, and diagnostic troubleshooting instructions for “BO” and l[...]

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 Information Pre-installation Considerations Dimensions/W eights Mechanical Requirements Electrical R[...]

4 SCXG-SVX01B-EN Figure I-GI-1. IntelliPak ® commercial self-contained Modular Series unit. Installation Modular Series Self-Contained Unit Components Commercial self contained units are complete HV AC systems used in floor -by- floor applications. Units are easy to install because they feature a single point power connection, factory installed an[...]

SCXG-SVX01B-EN 5 Installation Control Options Units can have either a thermostat control or IntelliPak ® UCM control network. IntelliPak ® Unit Controls Standard controls supplied with the IntelliPak ® unit include the human interface (HI) panel with unit control module (UCM), hi/lo inlet air temperature sensor , and frost protection. All setup [...]

6 SCXG-SVX01B-EN Installation General Information 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 Eac h self-contained unit has a multiple c haracter model number unique to that unit. T o determine a unit ?[...]

SCXG-SVX01B-EN 7 P S W G S A 1 1 0 AO 123 4 5 6789 10 11 Self-Contained Ship-With Accessory Model Number Description Installation General Information F = B and C G = A, B and C 0 = None Digit 26 - Drain P an T ype A = Galvanized Sloped B = Stainless Steel Sloped Digit 27 - Waterside Economizer A = Mechanical Clean Full Cap. (4-row) B = Mechanical C[...]

8 SCXG-SVX01B-EN Installation “ Af t er -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/Accessories P = Parts/Accessories Digit 2 - Unit Model S= Self-Contained Digit 3 - Shipme[...]

SCXG-SVX01B-EN 9 Installation Receiving and Handling Shipping Package Commercial self-contained units ship assembled on skids with protective coverings over the coil and discharge openings. Figure I-PC-1 illustrates a typical shipping package. Ship-Separate Accessories Field-installed sensors ship separately inside the unit ’ s main control panel[...]

10 SCXG-SVX01B-EN Installation Pre-Installation Considerations Installation Preparation Before installing the unit, perform the following procedures to ensure proper unit operation. 1 . V erify the floor or foundation is level. Shim or repair as necessary . T o ensure proper unit operation, install the unit level (zero tolerance) in both horizontal[...]

SCXG-SVX01B-EN 11 denser and fan motor access panels are secured with quick-acting fasteners. Access panels for evaporator coils, expansion and water valves, and left fan bearing are sheet metal screws. Access to other components for service requires removal of panels secured with sheet metal screws. During operation, sight glasses are viewable thr[...]

12 SCXG-SVX01B-EN Figure I-PC-6. Split-apart unit gravity block location. Figure I-PC-5. Assembled unit gravity block location. T able I-PC-2. Gra vity Block Dimensions Model A B C D SXWG 3 6 1 4 3 8 1 2 SXRG 3 6 1 6 40 1 2 Rigging and Unit Handling Before lifting the unit or modular component, determine the approximate center of gravity for liftin[...]

SCXG-SVX01B-EN 13 Pre-Installation Considerations Rigging and Handling Unit Shipping 1. 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 drag or pull unit while skidding the opposite end. [...]

14 SCXG-SVX01B-EN Split-Apart Unit Assembly 1 . Ensure the tagging information on the fan section nameplate matc hes that on the compressor nameplate. 2. Remo ve the connector brackets holding the the sheet metal shipping cover on compressor section. Retain brac kets and screws. 3. Remove shipping cover from the compressor section and verify the sh[...]

SCXG-SVX01B-EN 15 P re-Installation Considerations Installation Figure I-PC-9 How to assemble the split apart modular unit. Figure I-PC-1 0 Modular unit panel description and inte rnal connections.[...]

16 SCXG-SVX01B-EN Pre-Installation Considerations Skid Removal The unit ships on skids to provide forklift locations from the front or rear . The skid allows easy maneuverability of the unit during storage and transportation. Remove the skids before placing the unit in its permanent location. Remove the skids using a forklift or jack. Lift one end [...]

SCXG-SVX01B-EN 17 Dimensions and Weights Installation SCWG/SIWG Unit — English - (inches) ON P AGE 20 ON P AGE 21 ON P AGE 21 ON P AGE 21 ON P AGE 21[...]

18 SCXG-SVX01B-EN Dimensions and Weights Installation SCWG/SIWG Unit — Metric- (mm) ON P AGE 21 ON P AGE 21 ON P AGE 21 ON P AGE 21 ON P AGE 21[...]

SCXG-SVX01B-EN 19 Dimensions and Weights Installation SCRG/SIRG Unit — English - (inches) ON P AGE 21 ON P AGE 21 ON P AGE 21[...]

20 SCXG-SVX01B-EN Dimensions and Weights Installation SCRG/SIRG Unit — Metric - (mm) ON P AGE 21 ON P AGE 21 ON P AGE 21[...]

SCXG-SVX01B-EN 21 Dimensions and Weights Installation Unit Dimensions - English, (inches) Unit T ons A B C D E F SCWG/SCRG 20 20 10 3 / 4 58 1 / 2 5 1 / 8 13 1 / 4 11 1 / 2 SCWG/SCRG 25 1 9 1 / 4 12 1 / 4 57 5 / 8 5 1 / 8 13 1 / 4 11 1 / 2 SCWG 30 - 35/SCRG 32 18 14 5 / 8 56 1 / 2 5 1 / 8 13 1 / 4 11 1 / 2 Unit Dimensions - Metric (mm) Unit T ons A[...]

22 SCXG-SVX01B-EN Dimensions and Weights Installation Hot Water Coil Hot Water Coil Dimensions - English - (inches) Unit T on 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 T on A B C D E F G H J 20 - 3 5 94 6 1365 42 2 1867 37 8 413 1099 14 3 1 8[...]

SCXG-SVX01B-EN 23 Dimensions and Weights Installation Steam Coil Dimensions - English - (inches) Unit T on 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 14 1 9 3 / 8 4 3 / 8 Steam Coil Dimensions - Metric (mm) Unit T on A B C D E K L M N P Q R 20 - 3 5 94 6 1365 42 2 1867 27 6 5 72 86 40 3 2 [...]

24 SCXG-SVX01B-EN Dimensions and Weights Installation Electric Heat Coil[...]

SCXG-SVX01B-EN 25 Dimensions and Weights Installation Waterside Economizer[...]

26 SCXG-SVX01B-EN Dimensions and Weights Installation Airside Economizer Dimensions - English - (inches) Unit Size A B C D E F (1) F (2) G (1) G (2) H (1) H (2) J K L M SCWG/SIWG 20, 25 36 65 5 / 8 37 74 1 / 4 6 1 / 8 56 1 / 2 49 3 / 4 23 1 / 4 20 1 / 2 5 5 / 8 7 20 1 / 2 17 1 / 8 17 49 3 / 4 SCRG/SIRG 20 SCWG/SIWG 30, 35 36 65 5 / 8 37 74 1 / 4 6 [...]

SCXG-SVX01B-EN 27 Detail “ A ” Detail “ B ” Dimensions and Weights (F actory provided for field installation)[...]

28 SCXG-SVX01B-EN Dimensions and Weights Installation V ariable F requency Dr ive V ar iable Frequency Dr ive Dimensions - English - (inches) Motor HP V oltage 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 / 4 3 / 8 10 1 / 2 3 / 8 7 1 / 4 1 / 4 15 lb[...]

SCXG-SVX01B-EN 29 Dimensions and Weights Installation V ariable F r equency Drive with Bypass[...]

30 SCXG-SVX01B-EN V ar iable Fr equency Drive With Bypass Dimensions - English - (inches) Motor HP V oltage A B C D E F G H J K L M Weight 7.5 200V 19 1 / 2 17 1 / 2 1 7 / 8 41 39 3 / 4 13 1 / 2 12 3 1 / 4 38 1 1 / 4 20 1 / 2 2 3 / 8 126 lbs. 7.5 460V 14 1 / 2 12 1 / 4 1 7 / 8 35 33 3 / 4 13 1 / 2 12 3 1 / 4 32 1 1 / 4 14 3 / 4 2 3 / 8 87 lbs. 10 2[...]

SCXG-SVX01B-EN 31 Dimensions and Weights Flexible Horizontal Discharge Plenum Dimensions - English - (inches) 20-35 T ons A B C Low Height 35 1 7 1 / 4 86 1 / 2 Standard Height 35 2 5 1 / 4 86 1 / 2 Flexible Horizontal Discharge Plenum Dimensions - Metric (mm) 20-35 T ons A B C Low Height 88 9 43 8 2197 Standard Height 88 9 64 1 2197 Flexible Horiz[...]

32 SCXG-SVX01B-EN T able I-DW -1 . Unit Weights, English - SCWG/SCRG/SIWG/SIRG 2-Row 4-Row Unit Base Airside Waterside Waterside Heating Size Weight Economizer Economizer Economizer Coil Box lbs. lbs. lbs. lbs. lbs. SCWG/SIWG 20 2620 27 3 48 8 584 46 0 25 2730 27 3 48 8 584 46 0 30 2864 27 3 48 8 584 46 0 35 3000 27 3 48 8 584 46 0 SCRG/SIRG 20 234[...]

SCXG-SVX01B-EN 33 Mechanical Requirements Duct Connections Disconnect electrical power source before servicing the unit. Failure to do so may result in injury or death from electrical shock or entanglement in moving parts. Return air enters the rear of the unit and conditioned supply air discharges through the top. Attach supply air ductwork direct[...]

34 SCXG-SVX01B-EN Mechanical Requirements W ater Piping Note: T o prev ent water damage, inst all all piping drain and vent plugs. Condenser Connections Condenser water piping knockouts are in the lower left end panel. If necessary , remove insulation to gain access. All field installed piping must conform to applicable local, state, and federal co[...]

SCXG-SVX01B-EN 35 Figure I-MR-3. Condenser water piping components for cooling tower system. Mechanical Requirements Figure I-MR-4. T ypical water piping f or city or well water syst em. Installation General Waterside Recommendations: Cooling T ow ers Cooling tower control affects the unit cycle rates. Condenser water temperature swings from 10-15 [...]

36 SCXG-SVX01B-EN Refr iger ant Piping (Air -Cooled Units Only) The maximum line pressure design of each refrigerant circuit is 3 psig. Include the following items when designing refrigerant piping: oil traps, dual risers, oil return, etc. Refer to the T rane Reciprocating Refrigeration Manual for proper line sizing and layout. See the “ Star t U[...]

SCXG-SVX01B-EN 37 Electrical Requirements Unit Wiring Diagrams Specific unit wiring diagrams are provided on the inside of the control panel door . Use these diagrams for connections or trouble analysis. Supply Power Wiring It is the installer ’ s responsibility to provide power supply wiring to the unit terminal block or the non-fused disconnect[...]

38 SCXG-SVX01B-EN Electrical Requirements Selection Procedures RLA = Rated Load Amps Compressor LRA = Locked Rotor Amps Fan Motor LRA = Locked Rotor Amps, N.E.C. T able 430 - 150 FLA = Full Load Amps, N.E.C. T able 430 - 150 V oltage utilization range is ±10 percent Determination of minimum circuit ampacity (MCA). MCA = 1.25 x largest motor amps/V[...]

SCXG-SVX01B-EN 39 Pre-Startup Requirements Pre-Startup Procedures Before starting up units perform the following procedures to ensure proper unit operation. Unit Protective Covers Remove the shipping protection coverings from the human interface panel (HI) at the control panel, the filter box (or air inlet opening), the discharge air opening, and o[...]

40 SCXG-SVX01B-EN Unit Vibration Isolator Option Vibration isolation is not necessary for the unit since the factory internally isolates the fan and compressors, thus creating double isolation. The T rane Company strongly recommends that you consult a vibration specialist when considering double isolation. If job requirements dictate unit isolators[...]

SCXG-SVX01B-EN 41 Pre-Startup Requirements Plenum Before installing the plenum attach the insulation strip that ships with the plenum. See Figure I-PR-4 for proper insulation location. Align the plenum front with the control panel side of the unit. Using the strips and screws provided, secure the plenum to the unit. Do not remove more than two nona[...]

42 SCXG-SVX01B-EN Pre-Startup Requirements Installation Figure I-PR-5. Installing the waterside economiz er . W aterside Economize r Installation Procedure 1 . Loosen and pull all end devices that go through the bushing or the filter rac k (upper right corner of rack). 2 . Remove the filter rac k from the bac k of the unit by removing the 1 / 4 ”[...]

SCXG-SVX01B-EN 43 Pre-Startup Requirements Installation Figure I-PR-7 . W aterside economizer with left-hand f actory piping tubing assembly It em Part Description A Assembly #1 B Assembly #2 C Assembly #3 D Assembly #4 E T ube; 2 5 / 8 ” x 16 7 / 8 ” F T ube; 2 5 / 8 ” x 22 5 / 8 Figure I-PR-6. Detail view of ship-separate tubing assemblies [...]

44 SCXG-SVX01B-EN Pre-Startup Requirements Installation Figure I-PR-8. W aterside economizer with r ight-hand fact ory piping tubing assembly . It em Part Description A Assembly #1 B Assembly #2 C Assembly #3 D Assembly #4 E T ube; 2 5 / 8 ” x 1 1 3 / 4 ” F T ube; 2 5 / 8 ” x 20 1 / 4 ” G Actuator Assembly Figure I-PR-9. Detail view of ship[...]

SCXG-SVX01B-EN 45 Pre-Startup Requirements Installation Hydronic Coil Installation These instructions are for steam and hot water coil installation. The hydronic coil assembly has a full coil, piping, a modu- lating temperature control valve, and a disc temperature limit device located in the unit near the fan on the motor frame. Hydronic coils are[...]

46 SCXG-SVX01B-EN Disconnect electrical power source before wiring electric heat to unit to prevent risk of injury or death from electrical shock. 2. Punch out the appropriate knockouts in the electric heater control box and on the unit ’ s left side panel. Run the wires down the side of the unit from the heater to the lower unit control box. Pla[...]

SCXG-SVX01B-EN 47 V ariable F requency Dr ive Option (VFD) The variable frequency drive (VFD) option can only be used with IntelliPak units. The VFD and VFD w/bypass is available from 7.5 to 25 hp and is a Square D model Alti var 58. All VFDs are pre-configured and run-tested at the factory prior to shipping. The VFD is wall mounted. For more infor[...]

48 SCXG-SVX01B-EN Pre-Startup Requirements Airside Economizer Installation Unit Handling 1. Hoist the damper cabinet to the installation location with straps positioned under the skid as shown in Figure I-PR-12. Use spreader bars to prevent unit damage during lifting. 2. With the damper cabinet at its final location (near the unit), remove the scre[...]

SCXG-SVX01B-EN 49 Pre-Startup Requirements Static Pr essure T ransducer Installation (V A V units only) Supply air static pressure controls the inlet guide vane and VFD options. A static pressure head assembly ships separate in the control panel for field installation in the supply air duct work. The installer is responsible for providing pneumatic[...]

50 SCXG-SVX01B-EN Pre-Startup Requirements Installation Remote Mounted Thermostat Option Mount the thermostat in the largest space occupied by the most people for the best average temperature sensing. The thermostat should be mounted about 5 feet from the floor in contact with freely circulating air , but not with major drafts. Avoid the following [...]

SCXG-SVX01B-EN 51 Pre-Startup Requirements Figure I-PR-15. BA Y SENS01 7 Zone T emperatur e Sensor Only Standard with All Units Remote Zone Sensor Options Zone sensor options are available and can be ordered with the unit or after the unit ships. Following is a full description of zone sensors and their functions. Installation instructions are on p[...]

52 SCXG-SVX01B-EN Pre-Startup Requirements Figure I-PR-20. BA Y SENS0 13 Zone temperature sensor w/timed override , Accessory Model Number Digit 6 = B Figure I-PR-1 9. BA Y SENS0 14 Zone temperature sensor w/timed override and local setpoint adjustment, Accessory Model Number Digit 6 = C Figure I-PR-1 8 BA Y SENS01 0 Dual setpoint, manual/automatic[...]

SCXG-SVX01B-EN 53 Note: Guidelines for wire sizes and lengths are shown in T able I-PR-7 . The total resistance of these low voltage wires must not ex ceed 2.5 ohms per conductor . Any resistance greater than 2.5 ohms may cause the control to malfunction due to excessive voltage drop. Note: Do not run low-voltage control wiring in same conduit with[...]

54 SCXG-SVX01B-EN Figur e I-PR-23. T ypical zone sensor installation. Pre-Startup Requirements Figure I-PR-22. Zone sensor mounting hole locations. Mounting to Junction Box Mounting Directly to the Wall Junction Installation[...]

SCXG-SVX01B-EN 55 Pre-Startup Requirements Constant V olume Zone Sensor BA YSENS0 19 Descr iption This seven day programmable sensor with night setback has four periods for occupiedunoccupied programming per day . If power is interrupted, the program retains in permanent memory . If power is off longer than 2 hours, only the clock and day may have[...]

56 SCXG-SVX01B-EN 6. Pull the zone sensor module wires through the subbase as shown in Figure I-PR-31. 7. Loosely secure subbase to the wall with the mounting screws. Do not tighten the subbase screws yet. 8. Level the subbase by sight, then firmly tighten the three subbase mounting screws. Do not overtighten the subbase screws. Overtightening may [...]

SCXG-SVX01B-EN 57 Pre-Startup Requirements Time Clock Option The time clock option has a programmable timer that is factory wired to the unoccupied input to provide on/off control. The time clock will not allow the unit to pass through the night setback/ morning warmup mode, except on units with optional night heat/morning warm up, or programmable [...]

58 SCXG-SVX01B-EN Pre-Startup Requirements Figure I-PR-31 . Human Int erface (HI) P anel Keypad Installing the Remote Human Interface Panel Human Interface (HI) Panel The HI enables the user to communicate necessary unit operating parameters and receive operating status information from within the occupied space. The HI displays top level informati[...]

SCXG-SVX01B-EN 59 Pre-Startup Requirements Mounting the Remote Human Interface (RHI) Panel The installer must provide all mounting hardware such as; hand tools, electrical boxes, conduit, screws, etc. Refer to Figure I-PR-32 on page 60 for the mounting hole and knockout locations. Procedure Follow the procedure below for mounting the remote HI pane[...]

60 SCXG-SVX01B-EN Pre-Startup Requirements Figure I-PR-32. Remote HI mounting holes and knockout locations. Installation[...]

SCXG-SVX01B-EN 61 Wiring the Remote Human Interface The remote human interface requires 24 VA C + 4 volts power source and a shielded twisted pair communication link between the remote panel and the interprocessor communication bridge (ICPB) module at the self-contained unit. Field wiring for both the low voltage power and the shielded twisted pair[...]

62 SCXG-SVX01B-EN Connecting to T r acer Summit ® IntelliPak ® self-contained units operate with T rane building automation software, T racer Summit ® version 1 0.0.4 or later or any OS2 operating system. T ape the non-insulated end of the shield on shielded wire at the unit. Any connection between the shield and ground will cause a malfunction.[...]

SCXG-SVX01B-EN 63 Pre-Startup Requirements Installation Pre-Startup Checklist Complete this checklist after installing the unit to verify all recommended installation procedures are complete before unit start-up. This does not replace the detailed instructions in the appropriate sections of this manual. Always read the entire section carefully to b[...]

64 SCXG-SVX01B-EN Programming Installation Figure I-P -1. BA Y SENS0 19 Ke ypad and display configuration. BA YSENS0 19 Ke ypad and Display Explanation 1. Up and Down Buttons • Increases or decreased programmed temperature settings in program menu. • Shifts to temporary manual override in normal run mode. • Increases or decreases temperature [...]

SCXG-SVX01B-EN 65 Programming Installation Figure I-P -2. BA Y SENS020 Keypad and display configuration. BA YSENS020 K eypad and Display Explanation 1. Up and Down Buttons • Increases or decreased programmed temperature settings in program menu. • Shifts to temporary manual override in normal run mode. • Increases or decreases temperature whi[...]

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 type setpoints to review or program (heat, cool or auto). For example, if you select cool mode before toggling to the program menu, then only the cool setpoints are reviewed or programmed. If you select heat mode, then onl[...]

SCXG-SVX01B-EN 67 a temporary manual override menu. See Figure I-P-3. This mode overrides any number of programmed setpoints through any of the 28 programmed periods. After entering setpoints and length of override time, these settings are now used. Ke ypad Operation for T emporary Manual Override Menu The keypad has the same function in temporary [...]

68 SCXG-SVX01B-EN T emporary Ove r ride Run Mode The temporary override run mode sends setpoint data to the Unit Control Module (UCM) from the setpoint data entered in the temporary manual override menu. In temporary override run mode, most of the keypad functions lock out with these exceptions: • The mode button still functions as in normal run [...]

SCXG-SVX01B-EN 69 T able I-P -1 . Zone Sensor BA Y SENS01 9 Option Menu Settings. Option # Description V alue Factory Setting 1 Morning Warmup 0 = Disabled 0 1 = Enabled 2 Economizer minimum 0 = Disabled 1 Position override 1 = Enabled 3 T emperature Scale 0 = Fahrenheit 0 1 = Enabled 4 Supply Air T empering 0 = Disabled 0 1 = Enabled 5 Time Clock [...]

70 SCXG-SVX01B-EN Programming Installation T able I-P -2. Zone Sensor BA Y SENS020 Option Menu Settings. Option # Description V alue Factory Setting 1 Morning Warmup 0 = Disabled 0 1 = Enabled 2 Economizer minimum 0 = Disabled 1 Position override 1 = Enabled 3 T emperature Scale 0 = Fahrenheit 0 1 = Enabled 4 Heat Installed 0 = No 0 1 = Y es 5 Time[...]

SCXG-SVX01B-EN 71 Programming Installation Icon Descriptions BA YSENS0 19 Icon Descriptions Refer to Figure I-P-9 for a pictorial view of the 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 normal mode to display the day (not current in Progr[...]

72 SCXG-SVX01B-EN Programming Installation Figure I-P -10 . BA Y SENS020 complete icon display . BA YSEN020 Icon Descr iptions Refer to Figure I-P-10 for a pictorial view of the 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 normal run mode.[...]

SCXG-SVX01B-EN 73 Progr amming the Time Clock Option Setting the Time Important: Depress reset key before beginning to set time and program. 1 . Select military (24:0 0 hr .) or AM/PM (12:0 0 hr .) time mode by depressing and holding the “ h ” key while pressing “ + 1h ” key to toggle between military and AM/PM. (AM appears in the display w[...]

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 ’ s left lower section. Note: V erify the liquid line ser vice valv e is open at unit start-up. Each compressor suction line contains a low pressure sensor that will shut[...]

SCXG-SVX01B-EN 75 Installation Startup Log Complete this log at unit start-up. Unit: ____________________________ Unit Location: _________________________________________ Unit V oltage: __________ __________ __________ A B C Evaporator: Evaporator fan motor horsepower: __________ Evaporator fan motor amps: __________ __________ __________ A B C Eva[...]

76 SCXG-SVX01B-EN Installation Startup Water Cooled Units: Circuit A: Entering W ater T emperature - F: __________ Leaving W ater T emperature - F: __________ Entering Water Pressure - psig: __________ Leaving Water Pressure - psig: __________ Circuit B: Enter W ater T emperature - F: __________ Leaving W ater T emperature - F: __________ Entering [...]

SCXG-SVX01B-EN 77 Owner General Information Points List RTM Module: Binary inputs • Emergency stop • External auto/stop • Unoccupied/occupied • Dirty filter • V A V changeover with h ydronic heat Binary outputs • V A V box dri ve max (V A V units only) • CV unoccupied mode indicator (CV units only) • Alarm • Fan run request • Wa[...]

78 SCXG-SVX01B-EN Unit Control Components The Modular Series IntelliPak ® self- contained unit is controlled by a microelectronic control system that consists of a network of modules. These modules are referred to as unit control modules (UCM). In this manual, the acronym UCM refers to the entire control system network. These modules perform speci[...]

SCXG-SVX01B-EN 79 T able O-GI-2. RTM Sensor Resistance vs. T emperatur e T emperature (F) Resistance (ohms) T emperature (F) Resistance (ohms) - 40 346.1 71 11.60 - 30 241.7 72 11.31 - 20 170.1 73 11.03 - 10 121.4 74 10.76 -5 103.0 75 10.50 0 87.56 76 10.25 5 74.65 77 10.00 10 63.8 78 9.76 15 54.66 79 6.53 20 46.94 80 9.30 25 40.40 85 8.25 30 34.85[...]

80 SCXG-SVX01B-EN Compressor Module (SCM and MCM - Standard on All Units The compressor module, (single circuit and multiple circuit) energizes the appropriate compressors and condenser fans upon receiving a request for mechanical cooling. It monitors the compressor operation through feedback information it receives from various protection devices.[...]

SCXG-SVX01B-EN 81 Figure O-GI-2. V elocity Pressur e T rans- ducer/Solenoid Assembly . • VO relay – energiz ed • Exhaust fan (field-installed) - on • Exhaust damper (field-installed) - open PURGE sequence “ D ” This sequence could be used for purging the air out of a building before coming out of unoccupied mode of operation on V A V un[...]

82 SCXG-SVX01B-EN Generic Building Automation System Module Option The generic building automation system module (GBAS) provides broad control capabilities for building automation systems other than T rane ’ s T racer ® system. A field provided potentiometer or a 0-5 vdc signal can be applied to any of the inputs of the GBAS to provide the follo[...]

SCXG-SVX01B-EN 83 T able O-GI-6. GBAS Analog Input Setpoints Control Parameter Signal Range Setpoint Range Occupied Zone Cooling Setpoint 0 .5 t o 4.5 vdc 50 to 90 F (CV units only) Unoccupied Zone Cooling Setpoint 0. 5 to 4.5 vdc 50 to 90 F (CV and VA V) Occupied Zone Heating Setpoint 0 .5 t o 4.5 vdc 50 to 90 F (CV units only) Unoccupied Zone Hea[...]

84 SCXG-SVX01B-EN temperature is less than 58 F (15 C). This option allows the compressor to operate with entering fluid temperature down to 35 F (2 C). The minimum valve position to maintain minimum condenser flow rates is user-defined at the HI. This valve drives closed if the unit shuts down or if a power failure occurs. • Water Flow Switch Op[...]

SCXG-SVX01B-EN 85 Owner Condenser 1 Condenser 2 V2 Condenser 1 Condenser 2 V1 Economizer Condenser 1 Condenser 2 V2 Figure O-GI-3. Basic water piping configu- ration, constant water flow . Figure O-GI-4. Intermediate water piping configuration, v ar iable wat er flow . Figure O-GI-5. Intermediate piping configuration with waterside economizer , v a[...]

86 SCXG-SVX01B-EN Owner Unit Airside Components The unit ’ s air deli very system consists of condensers, dampers, enthalpy switch option, airside economizer option, filters, low ambient sensors, and factory mounted single or double wall plenums. Supply Air Fan The unit has a single supply fan that runs at a constant speed. However , the fan may [...]

SCXG-SVX01B-EN 87 Owner mode at the HI panel. When in bypass mode, V A V boxes need to be fully open. The self-contained unit will control heating and cooling functions to maintain setpoint from a user -defined zone sensor . Supply air static pressure limit is active in this mode. For more detailed information on VFD operation, reference the Square[...]

88 SCXG-SVX01B-EN T able O-GI-10 . Remote Air -Cooled Condenser Refriger ant Connection Sizes - English inches (Metric, mm) Unit Circuit 1 Circuit 1 Circuit 2 Circuit 2 Size Liquid Line Discharge Line Liquid Line Discharge Line CXRC 20, 25, 29, 30 5 / 8 1 1 / 8 5 / 8 1 1 / 8 (16) (29) (16) (29) Standard T wo-P osition Damper Interf ace Units with t[...]

SCXG-SVX01B-EN 89 Input Devices and System Functions Following are basic input device and system function descriptions used within the UCM network on IntelliPak ® self- contained units. Refer to the unit wiring diagrams for specific connections. Water Purge During the unoccupied mode, water- cooled units will periodically circulate water through t[...]

90 SCXG-SVX01B-EN condenser water temperature exceeds 58 F . Low Ambient Control (Air-Cooled Units Only) The low ambient modulating output on the compressor module is functional on all units with or without the low ambient option. When the compressor module stages up to it's highest stage (stage 2 or 3 depending on unit size), the modulating o[...]

SCXG-SVX01B-EN 91 Owner Control Sequences of Operation Occupied/Unoccupied Switching There are four ways to switch occupied/ unoccupied: (1) Night setback zone sensor (2) Field-supplied contact closure (hardwired binary input to RTM) (3) T racer Summit ® (4) Factory-mounted time clock Field Supplied Occupied/Unoccupied Input on the RTM This input [...]

92 SCXG-SVX01B-EN Owner Sequence of Operation Timed Over r ide Activation - ICS ™ This function is operational whenever the unit ’ s RTM module is used as the zone temperature sensor source, which can be set at the HI panel. When this function is initiated by the push of the override button on the z one sensor , the unit will switch to the occu[...]

SCXG-SVX01B-EN 93 Owner Sequence of Operation Occupied Sequence Of Operation All setpoints can be adjusted using the HI panel. Also, cooling/heating setpoints can be adjusted in the zone, if using one of the zone sensor options (BA YSENS020, BA YSENS021, BA YSENS0 08, BA YSENS0 1 0, BA YSENS01 9, or BA YSENS0 1 4). For a complete list of unit setpo[...]

94 SCXG-SVX01B-EN Owner Sequence of Operation control setting, only mechanical cooling will function and outside air dampers will remain at their minimum position. Mechanical Cooling If the zone temperature cannot be maintained within the setpoint deadband using the economizer option or if there is no economizer , the RTM sends a cooling request to[...]

SCXG-SVX01B-EN 95 T able O-SO-1. Compressor Stages. Unit Refrigerant Compressor HP Standard Lead/Lag SCM Size Circuit T ype by Stage Compressor Compressor or Model # Digit 5 A B Staging Staging MC SXWG 20, 25 Independent 1 0 1 0 B/AB A/AB M C M SXRG 20 SXWG 30 Independent 1 5 1 0 B/A/AB A/AB M C M SXRG 25 SXWG 35 Independent 1 5 1 5 B/AB A/AB M C M[...]

96 SCXG-SVX01B-EN Owner Sequence of Operation Compressor Safety Devices The compressors have motor temperature cutout switc hes in the motor windings. These switches are pro vided to take the compressors off line during high motor winding temperature conditions. If a compressor low pressure cutout opens during compressor start-up, the UCM will not [...]

SCXG-SVX01B-EN 97 Owner Sequence of Operation Figure O-SO-2. T ypical pulldown curve for unit oper ating properly within contr ol band. Figure O-SO-3. T ypical pulldown curve for unit oper ating improperly outside contr ol band. band according to the desired unit performance. Increasing the control band reduces the equipment cycle rate and increase[...]

98 SCXG-SVX01B-EN Maintenance Procedures Air Filters Filter access doors are on the same side of the unit as the water piping connections. T o replace throwa way filters, remove the dirty elements and install new filters with the filter ’ s directional arrows pointing toward the fan. V erify that no air bypasses the filter s. All unit sizes requi[...]

SCXG-SVX01B-EN 99 Supply Fan Fan Drive Perform the following procedures according to the “ Periodic Maintenance Check List ” on page 110. Disconnect electrical power source to prevent injury or death from electrical shock. 1. Rotate the fan wheel to be sure it turns freely in the proper direction and is not rubbing on the fan housing, inlet, or[...]

100 SCXG-SVX01B-EN Figure O-M-2. Fan Belt Adjustment. Figure O-M-3. Belt T ension Gauge. Fan Bearings The opposite drive end bearing is a special bearing with close tolerance fit of balls and races. Replace this bearing with the same part number as the original bearing. F an Belt T ension Note: Check fan belt tension at least twice during the first[...]

SCXG-SVX01B-EN 101 Owner Maintenance Figure O-M-5. Fan assembly . Figure O-M-6 . Fan motor adjustment points.[...]

102 SCXG-SVX01B-EN Follow specific manufacturer ’ s guidelines for conversion of existing systems. • T o assist in reducing power generation emissions, always attempt to improve equipment performance with improved maintenance and operations that will help conserve energy resources. WARNING: Do not work in a closed area where refrigerant or nitr[...]

SCXG-SVX01B-EN 103 refrigerant service work such as gauges, hoses, vacuum pumps, and recycling equipment. • Stay aware of unit enhancements, conversion refrigerants, compatible parts, and manufacturer ’ s recommendations that will reduce refrigerant emissions and increase equipment operating efficiencies. Follow specific manufacturer ’ s guid[...]

104 SCXG-SVX01B-EN Do not exceed 200 psig when leak testing the system. Damage to the unit could result, or an explosion may occur causing injury or death. In the event of required system repair , leak test the liquid line, evaporator coil, and suction line at pressures dictated by local codes, using the following guidelines. 1. Charge enough refri[...]

SCXG-SVX01B-EN 105 Figure O-M-7 . T ypical water -cooled (SXWG) compressor section components. Maintenance Owner[...]

106 SCXG-SVX01B-EN Inlet Guide V anes Perform the following procedure every six months for proper inlet guide vane operation: 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 Mobilux 2, Shell alvonia 2, or equivalent). Mai[...]

SCXG-SVX01B-EN 107 Coil Fin and External Cleaning Keep coils clean to maintain maximum performance. For operation at its highest efficiency , clean the refrigerant coil often during periods of high cooling demand or when dirty conditions prevail. Clean the coil a minimum of once per year to prevent dirt buildup in the coil fins, where it may not be[...]

108 SCXG-SVX01B-EN Maintenance Also, a drain plug is at the bottom of the inlet condenser manifold and in the outlet pipe near the unit ’ s left side. Remove these plugs to drain the condensers. Be sure to open the vent plugs at the top of the condenser inlet and outlet manifold. See Figure O-M-7 on page 105. When refilling the condenser/watersid[...]

SCXG-SVX01B-EN 109 Piping Components W ater V alves Water valves have a stern packing nut. If there is evidence of water leakage at the valve stem, proceed as follows: 1. Remove actuator motor from support plate. (Remove four mount bolts) 2. Remove shaft coupling. 3. T orque the pac king nut to 1 0-ft.-lbs. of torque. 4. Replace shaft coupling. 5. [...]

110 SCXG-SVX01B-EN Periodic Maintenance Checklists Monthly Checklist The following check list provides the recommended maintenance schedule to keep the unit running efficiently . Disconnect power source and allow all rotating equipment to stop completely before servicing or inspecting the unit. Failure to do so may result in injury or death. 1. Ins[...]

SCXG-SVX01B-EN 111 T able 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 Coil face velocity too high Reduce fan speed Impro[...]

112 SCXG-SVX01B-EN Diagnostic T r oubleshooting Diagnostics Refer to the IntelliPak ® Self-Contained Programming Guide, PKG-SVP01B-EN, for specific unit programming and troubleshooting information. In particular , reference the “ Service Mode Menu ” and “ Diagnostic Menu ” sections in the programming guide. Refer to the following text for [...]

SCXG-SVX01B-EN 113 Diagnostic T r oubleshooting Diagnostics Reset R equired: (P AR) An automatic reset occurs after communication has been restored. Emergency Stop Problem: The emergency top input is open. Reason for Diagnostic: An open circuit has occurred on the emergency stop input caused either by a high duct temp t- stat trip, or the opening o[...]

114 SCXG-SVX01B-EN Diagnostic T r oubleshooting Diagnostics this input (temp < -55 F or temp > 209 F). UCM ’ s Reaction: The functions that designated the heat module auxillary temperature input as their input are disabled. Reset R equired: (P AR) An automatic reset occurs after the heat module auxillary temperature input returns to its all[...]

SCXG-SVX01B-EN 115 Diagnostic T r oubleshooting Diagnostics UCM ’ s Reaction: The system mode reverts to the default (HI set) system mode. Reset Required: (INFO) An automatic reset occurs after the mode input returns to its allowable range for 10 seconds. N NSB P anel Zone T emperatur e Sensor Failure Problem: The NSB panel's zone temp senso[...]

116 SCXG-SVX01B-EN Diagnostic T r oubleshooting Diagnostics its allowable range continuously for 10 seconds. RTM A ux. T emp. Sensor Failur e Problem: The RTM auxillary temperature sensor data is out of range. Check: Sensor resistance should be between 830 ohms (200 F)and 345.7 Kohms (-40 F). If so, check field/unit wiring between sensor and RTM. R[...]

SCXG-SVX01B-EN 117 Diagnostic T r oubleshooting Diagnostics range for 10 continuous seconds, or after a different SA pressure setpoint source is user-defined. Supply Air T emp Cool Setpoint Fail Problem: The active supply air temperature cooling setpoint is out of range. Reason for Diagnostic: The input designated as the SA temp cooling setpoint is[...]

118 SCXG-SVX01B-EN Diagnostic T r oubleshooting Diagnostics Reason for Diagnostic: The TCI has lost communications with T racer Summit ® for > 15 minutes. UCM ’ s Reaction: All acti ve commands and setpoints provided by T racer Summit ® through the TCI will be cancelled and/or ignored. And where T racer vSummit ® has been designated as the [...]

SCXG-SVX01B-EN 119 Diagnostic T r oubleshooting Diagnostics W WSM Communications Fail Problem: The RTM has lost communication with the WSM. Check: Field/unit wiring between RTM and WSM. Reason for Diagnostic: The RTM has lost communication with the WSM. UCM ’ s Reaction: The UCM will react as if a freezestat has occurred by issuing: • An “ Al[...]

120 SCXG-SVX01B-EN Index A “After-Shipment” Accessory Model Number 8 Air Filters 98 Air-Cooled Condensers 88 Airside Economizer Installation 48 Airside Economizer Interface 88 Airside Economizer Interface with Comparative Enth 88 Airside Economizer Option 87 Airside Economizers with T raq Damper 87 Ambient T emperature and Humidity Limits 58 An[...]

SCXG-SVX01B-EN 121 Index Sensor Fail 113 Heat Module Comm Failure 114 HI 58, 80 HI Location Recommendations 58 High Duct Static Switch 90 High Duct T emp Thermost at 90 High Duct T emperature Thermostat 86 high duct thermostat can be reset 90 Holdtemp Button 67 Human Interface 58 Human Interface Module 80 Human Interface Panel 5 Hydronic Coil Insta[...]

122 SCXG-SVX01B-EN Return Air Humidity Sensor Failure 115 Re turn Air T emp Sensor Failure 1 1 5 Re turn Air T emperature Sensor 90 RHI 58, 80 Rigging and Handling 13 Rigging and Unit Handling 12 RTM Alarm Relay 78 RTM Analog Outputs 78 RT M A ux. T emp. Sensor Failure 1 16 RTM Binary Outputs 78 RTM Data Storage Error 116 RTM Module Board 78 RTM Re[...]

SCXG-SVX01B-EN 123 W ater T emperature Requirements 35 W ater V alves 1 09 Water-Cooled Condensers 84 Water-Cooled Unit Piping 63 Waterside Components 84 Waterside Economizer Flow Control 84 Waterside Economizer Installation Procedure 42 Waterside Economizer Option 84 Waterside Module 80 Waterside Piping Arrangements 35 Wiring 53 Wiring the Remote [...]

The T rane Company A Division of American Standard Inc. www.trane.com For more information contact your local district office or e-mail us at comfort@trane.com An American Standard Company Literature Order Number File Number Supersedes Stocking Location Since The T rane Company has a policy of continuous product improvement, it reserves the right t[...]