Trane SCXG-SVX01B-EN manual

SCXG-S VX0 1B-EN Installation, Operation, & Maintenance Int elliP ak Commercial Self-Contained Modular Series, 20-35 tons “JO” and later design sequence Models: SCWG -020, -025, -030, -032, -035 SIWG -020, -025, -030, -032, -035 SCRG -020, -025, -030, -032 SIRG -020, -025, -030, -032 Marc h 20 08 TM[...]

© 20 08 T rane All rights reserved SCXG-SVX0 1B-EN About This Manual Liter atur e Chang e Hist ory Use this manual for commercial self- contained models SCWG, SIWG, SCRG, and SIRG. This is the second or “B” revision of this manual. It provides specific installation, operation, and maintenance, instructions for “JO” and later design sequenc[...]

SCXG-S VX0 1B-EN 3 Cross reference to related publications/information: • Product Catalog, PKG-PRC003-EN, Modular Series Commercial Self-Contained • IntelliPak • Self-Contained Programming Guide, PKG-SVP01B-EN • Remote Air -Cool-Condenser Installation, Owner , and Diagnostic Manual, CXRC- SVX01B-EN Installation ………………………?[...]

4 SCXG-S VX0 1B-EN F eatures and Benef its Refr ig erant Handling Procedures Environmental Accountability Policy T rane urges that all HV AC servicers to make every effort to eliminate, if possible, or vigorously reduce the emission of CFC, HCFC, and HFC refrigerants to the atmosphere. Always act in a responsible manner to conserve refrigerants for[...]

SCXG-SVX0 1B-EN 5 Figure I-GI-1. IntelliPak ® commercial self-contained Modular Series unit. Modular Ser ies 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 and tested co[...]

6 SCXG-S VX0 1B-EN Installation Control Options Units may be ordered with either conventional thermostat interface or IntelliPak TM Direct Digital Control (DDC). IntelliPak TM controls include a Human Interface (HI) panel with two line by forty (40) c haracter clear English display for easy operator interface to unit setup and control parameter s. [...]

SCXG-SVX0 1B-EN 7 Model Number Description Model Number Description Eac h IntelliP ak self-contained unit has a multiple c haracter model number unique to that unit. T o determine a unit’ s specific o ptions, reference the model number on the unit nameplate using the model number explanation below. SCWG S C W G N 2 0 4 2 JO A B 2 1 0 085 B A 1 0 [...]

8 SCXG-S VX0 1B-EN Model Number Description SCWG Digit 22 - Unit Finish 1 = Paint - Executive Beige 2 = Protective Coating 3 = Protective Coating w/ Finish Coat Digit 23 0 = None Digit 24 - Unit Connection 1 = Disconnect Switc h 2 = T erminal Block 3 = Dual Point Power Digit 25 - Industrial Options A = Protective Coated Evaporator Coil B = Silver S[...]

SCXG-SVX0 1B-EN 9 P S W G S A 1 1 0 JO 1 2 3 4 5 6 7 8 9 1 0 1 1 Self-Contained Ship-With Accessory Model Number Descr iption Digit 1 - Parts/Accessories P = Parts/Accessories Digit 2 - Unit Model S= Self-Contained Digit 3 - Shipment W = With Unit Digit 4 - Development Sequence F = Signature Series G = Modular Series Digit 5 - Sensors and Other Acc[...]

10 SCXG-S VX0 1B-EN Model Number Description PSWG “ Aft er -Shipment” Accessory Model Number P S A G W N 20 4 * * 1 1 0 0 0 0 1 0 1 0 1 0 1 0 0 1 1 0 0 0 0 0 L 1 0 0 7 0 0 1 2 3 4 5 6 7 8 9 1 0 1 1 12 13 14 15 16 1 7 1 8 1 9 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Digit 1 - Parts/Accessories P = Parts/Accessories Digit 2 [...]

SCXG-SVX0 1B-EN 11 Installation Receiving and Handling Shipping Package Commercial self-contained units ship assembled 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. Extra [...]

12 SCXG-S VX0 1B-EN pre-installation considerations Installation Installation Pr eparation 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 horizon[...]

SCXG-SVX0 1B-EN 13 Service Access      W ARNING Hazardous V oltage w/Capacitors! Disconnect all electric po wer , including remote disconnects before servicing. Follo w proper loc k out/tagout pr oce- dures to ensure the power cannot be inadver tently ener gized. For v ar iable frequency dr ives or other ener g y stor ing components [...]

14 SCXG-S VX0 1B-EN pre-installation considerations Installation Rigging and Unit Handling      W ARNING Improper Unit Lift! T est lift unit appr oximat ely 24 inches to verify proper center of gravity lift point. T o av oid dr opping of unit, r eposition lifting point if unit is not level. Failure to properly lift unit could result [...]

SCXG-SVX0 1B-EN 15 pre-installation considerations Installation Figure I-PC-8. Split-apart modular unit pr oper r igging. Figure I-PC-7 . Assembled modular unit pr oper rigging. Unit Handling Pr ocedur e NO TICE Do not use hooks to lift unit or hook into open channels to lif t unit. This could cause unit damage. 1 . Position rigging sling under woo[...]

16 SCXG-S VX0 1B-EN Installation pre-installation considerations Split-Apar t Unit Assembly 1. Ensure the tagging information on the fan section nameplate matches that on the compressor nameplate. 2. Remove the connector brackets holding the the sheet metal shipping cover on compressor section. Retain brackets and screws. 3. Remove shipping cover f[...]

SCXG-SVX0 1B-EN 17 Installation pre-installation considerations Figure I-PC-9 How to assemble the split apart modular unit Figure I-PC-1 0 Modular unit panel descr iption and inter nal connections[...]

18 SCXG-S VX0 1B-EN pre-installation considerations Installation Skid Remo v al 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 ja[...]

SCXG-SVX0 1B-EN 19 SCWG SIRG Dimensions & W eights SCWG/SIWG Dimensions, in. l eft-side view f actory-piped units front view left-side view direct condenser connections top view back view r ight-side view f actory-piped units r ight-side view direct-condenser connections SCWG/SIWG weight, lbs. unit tons base weight 2 0 2260 2 5 2730 3 0 2864 3 [...]

20 SCXG-S VX0 1B-EN SCRG / SIRG Dimensions & W eights SCRG/SIRG Dimensions, in. SCRG/SIRG W eight, lbs. unit tons base weight 2 0 2344 2 5 2479 3 2 2614 Notes: 1 . All unit weights include refrigerant, water , inlet guide vanes and controllers, electric heat and valves. 2 . Add 150 lbs. to total weight to obtain approximate shipping weight. 3. [...]

SCXG-SVX0 1B-EN 21 Dimensions & W eights Detail Dimensions, in. model A B C D E F SCWG/SCRG 20 2 0 1 0 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 1 8 14 5 / 8 56 1 / 2 5 1 / 8 13 1 / 4 11 1 / 2 front view shown with hor izontal disc har ge option top view show[...]

22 SCXG-S VX0 1B-EN CCRC / CIRC Dimensions & W eights B C (LIQUID LINE CONNECTION REFRIG. CIRCUIT 1) (HOT GAS CONNECTION REFRIG. CIRCUIT 1) (LIQUID LINE CONNECTION REFRIG. CIRCUIT 2) (HOT GAS CONNECTION REFRIG. CIRCUIT 2) REFRIGERANT CIRCUIT 2 REFRIGERANT CIRCUIT 1 CCRC/CIRC Air -cooled condenser dimensions & weight, in-lbs. shipping operat[...]

SCXG-SVX0 1B-EN 23 Hot water coil dimensions & weight, in-lbs. unit size A B C D E F G H J weight 20 - 35 tons 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 / 4 460 Dimensions & W eights Hot W at er Coil[...]

24 SCXG-S VX0 1B-EN Steam Coil Dimensions & W eights Steam coil dimensions, in-lbs. unit size A B C D E K L M N P Q R weight 20 - 35 tons 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 / 8 460[...]

SCXG-SVX0 1B-EN 25 Electr ic Heat Coil Electr ic heat coil dimensions & weight, in-lbs. unit size A B C D weight 20 tons 70 1 / 4 4 7 / 8 11 1 / 2 1 9 460 25 tons 70 1 / 4 4 1 / 8 11 1 / 2 1 9 460 30 - 35 tons 70 1 / 4 2 7 / 8 11 1 / 2 19 460 Note: Coil box height is 8 in. Flexible hor izontal disc harg e plenum dimensions & weights, in-lbs[...]

26 SCXG-S VX0 1B-EN W at erside Economizer W aterside economiz er weight, in-lbs. weight unit size 2-row 4-row 20 - 35 tons 4 8 8 5 8 4 Dimensions & W eights[...]

SCXG-SVX0 1B-EN 27 Air side Economiz er Dimensions & W eights Airside economizer dimensions & weight, in-lbs. unit size A B C D E F (1) F (2) G (1) G (2) H (1) H (2) J K L M weight SCWG/SIWG 20, 25 3 6 65 5 / 8 37 7 4 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 1 2 49 3 / 4 273 SCRG/SIRG 20 SCWG/SIWG 30, 35[...]

28 SCXG-S VX0 1B-EN VFD A B C D E F G VFD dimensions, in. voltage hp A B C D E F G 46 0 7 .5 15.55 15.12 7 .8 7 8.66 0.39 0.24 7 . 87 10 20 8 7 . 5 22.05 21 .26 7 . 87 9.53 0.83 0.30 1 0.24 10 460 1 5 20 25 20 8 1 5 27 .56 26.77 1 0.63 12.13 0.83 0.30 1 1 .05 20 460 3 0 40 20 8 3 0 31 .50 30.71 1 0.63 12.13 0.75 0.30 1 1 .6 5 460 5 0 60 20 8 4 0 31[...]

SCXG-SVX0 1B-EN 29 VFD Dimensions & W eights V ar iable F r equency Dr ive with Bypass VFD with bypass dimensions, in. voltage hp A B C D E F G H 4 6 0 7.5 30.40 28.03 16.14 23.35 24.85 0.75 8.59 10.63 10 2 0 8 7.5 41.28 38.89 16.14 24.00 25.5 0.75 10.95 12.99 10 15 20 460 1 5 20 25 2 0 8 25 50.81 48.35 21.36 31.61 33.41 0.90 12.36 14.41 H G E [...]

30 SCXG-S VX0 1B-EN W at er Piping      W ARNING High Pr essur e W ater! Pr ovide r elief v alv es on system w ater piping to prevent instantaneous release of high pressur e wate r . F ailure t o pr ovide relief v alves could r esult in death or ser ious injury or water pump damag e or unit f ailur e. Condenser Connections Condenser [...]

SCXG-SVX0 1B-EN 31 Mec hanical Specif ications Condensate Drain Connections The condensate drain is internally trapped. Condensate drain connections are on the unit’ s left side. Connect condensate drain piping to the 1 1 / 4 “ NPT female fitting, using at least 7 / 8 ” OD copper or 3 / 4 “ OD iron pipe. Pitc h the condensate line downward [...]

32 SCXG-S VX0 1B-EN Refr iger ant Piping (Air -Cooled Units Only) See the “Startup” section of this manual for instructions on refrigerant evacuation, charging, and superheat measurement. Leak-test the entire refrigeration system after all piping is complete. Leak T est (Remote Air -cooled Units Only) Units ship with a holding c harge of dry ni[...]

SCXG-SVX0 1B-EN 33 Specific unit wiring diagrams are provided on the inside of the control panel door . Use these diagrams for connections or trouble analysis. Supply P ow er Wir ing      W ARNING Hazardous V oltage w/Capacitors! Disconnect all electric po wer , including remote disconnects before servicing. Follo w proper loc k out/[...]

34 SCXG-S VX0 1B-EN Selection Pr ocedur es RLA = rated load amps Compressor LRA = locked rotor amps Fan motor LRA = locked rotor amps, N.E.C. table 430 - 150 FLA = full load amps, N.E.C. T able 430 - 150 V oltage utilization range is ±1 0% Determination of minimum circuit ampacity (MCA). MCA = 1.25 x largest motor amps/VFD amps (FLA or RLA) + the [...]

SCXG-SVX0 1B-EN 35 pre-star tup requirements Installation Pr e-Start up Procedur es      W ARNING Hazardous V oltage w/Capacitors! Disconnect all electric po wer , including remote disconnects before servicing. Follo w proper loc k out/tagout pr oce- dures to ensure the power cannot be inadver tently ener gized. For v ar iable freque[...]

36 SCXG-S VX0 1B-EN pre-star tup requirements Plenum Before installing the plenum attach the insulation strip that ships with the plenum. See Figure I-PR-3 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. T reat field-cut holes to pre[...]

SCXG-SVX0 1B-EN 37 pre-star tup requirements Airside Economizer Installation Note: Airside economizer option available on 20-80 tons only . Unit Handling 1. Hoist the damper cabinet to the installation location with straps positioned under the skid as shown in Figure I-PR-4. Use spreader bars to prevent unit damage during lifting. 2. With the dampe[...]

38 SCXG-S VX0 1B-EN pre-star tup requirements Static Pr essur e T ransducer Installation (V A V units only) Supply air static pressure controls the inlet guide vane and inverter 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 [...]

SCXG-SVX0 1B-EN 39 pre-star tup requirements Installation Figur e I-PR-7 . Installing the w aterside economizer . W aterside Economiz er Installation Procedure 1. Loosen and pull all end devices that go throught the bushing on the filter rack (upper right corner of rack). 2. Remove the filter rack from the back of the unit by removing the 1 / 4 ”[...]

40 SCXG-S VX0 1B-EN pre-star tup requirements Installation Figure I-PR-9. W aterside economiz er with left-hand f actory piping tubing assembly Ite m 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-8. Detail view of ship-separate tubing assembli[...]

SCXG-SVX0 1B-EN 41 pre-star tup requirements Installation Figure I-PR-1 0. W aterside economizer with r ight-hand factory piping tubing assembly . Ite m 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-1 1. Detail view of[...]

42 SCXG-S VX0 1B-EN pre-star tup 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 [...]

SCXG-SVX0 1B-EN 43 pre-star tup requirements Installation Electr ic Heat Installation The electric heat option consists of a single stage heater and is used in IntelliPak units or units with a field- installed thermostat. The electric heater ships separate for field installation and wiring. Available heater kW per unit size is listed in T able I-PR[...]

44 SCXG-S VX0 1B-EN Figur e I-PR-1 0. BA Y SENS1 1 0 Dual setpoint, manual/automatic changeover sensor with system function lights, acces- sory model number digit 6 = F pre-star tup requirements Figur e I-PR-7 . BA Y SENS077 zone temperature sensor only Standard with All Int elliP ak Units Zone Sensor Options for Int elliP ak Control Units Zone sen[...]

SCXG-SVX0 1B-EN 45 pre-star tup requirements Figur e I-PR-12. BA Y SENS073 Zone temperature sensor w/timed override , accessory model number digit 6 = B Figure I-PR-1 1 . BA Y SENS07 4 Zone temperature sensor w/timed override and local setpoint adjustment, accessory model number digit 6 = C Integr ated Comf ort ™ Syst ems Sensors for CV and V A V[...]

46 SCXG-S VX0 1B-EN lite rat ure f or allowable waiting per iods f or dischar ge of capacit ors. V er ify with an appropr iate v oltmeter that all capacit ors hav e disc harg ed. F ailure t o disconnect power and discharge capacitors before servicing could result in death or serious injury . Note: For additional information regard- ing the safe dis[...]

SCXG-SVX0 1B-EN 47 RIGHT BACK 1-3/32 [27,43 m m] 3/32 [2,00 m m] 1-3/8 [35,00 m m] 19/32 [15,00 m m] 15/64 [6,00 mm ] 3-5/32 [80,00 m m] 1-1/32 [26,16 m m] 5/32 [3,81 m m] 4X Figure I-PR-22. Zone sensor mounting hole locations f or: BA Y SENS077 , BA Y SENS073, BA YSENS07 4, BA YSENS1 08, and BA Y SENS1 1 0. pre-star tup requirements Installation Z[...]

48 SCXG-S VX0 1B-EN Junc Mounting to Junction Box Mounting Directly to the Wall Figur e I-PR-23. T ypical zone sensor installation for v ertically -or iented sensors Installation pre-star tup requirements[...]

SCXG-SVX0 1B-EN 49 pre-star tup requirements Constant V olume Zone Sensor BA Y SENS0 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 two hours, only the clock and day may[...]

50 SCXG-S VX0 1B-EN pre-star tup requirements Programmable Zone Sensor Installation Mounting Location Mount the sensor on the wall in an area with good air circulation at an average temperature. Choose a location that is easily accessible, and on a wall where the subbase can be mounted about 5 feet (1 .5 meter s) above the floor . Avoid mounting sp[...]

SCXG-SVX0 1B-EN 51 pre-star tup 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 programmabl[...]

52 SCXG-S VX0 1B-EN pre-star tup requirements Figure I-PR-23. Human interf ace (HI) panel k eypad Remot e Human Interf ace P anel Installation 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 inform[...]

SCXG-SVX0 1B-EN 53 pre-star tup 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-24 for the mounting hole and knockout locations. Procedure Refer to Figure I-PR-24 and follow the procedure below for mounting[...]

54 SCXG-S VX0 1B-EN pre-star tup requirements Figure I-PR-24. Remote HI mounting holes and knockout locations Installation[...]

SCXG-SVX0 1B-EN 55 Wir ing the Remot e 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 p[...]

56 SCXG-S VX0 1B-EN pre-star tup requirements Installation Connecting to T racer Summit      W ARNING Hazardous V oltag e w/Capaci- tors! Disconnect all electr ic power , including remote disconnects before servicing. Follow proper lockout/tagout proce- dures to ensure the power cannot be inadvertently energized. For variable frequen[...]

SCXG-SVX0 1B-EN 57 pr ogramming Installation Figure I-P -1 . BA YSENS0 19 k eypad and display configur ation BA Y SENS0 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 temperatur[...]

58 SCXG-S VX0 1B-EN pr ogramming Installation Figur e I-P -2. BA Y SENS020 ke ypad and display configur ation BA Y SENS020 BA Y SENS020 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 decreas[...]

SCXG-SVX0 1B-EN 59 Program Button Depressing the program button will toggle the display from normal run mode to the program menu. See Figure I-P-3. 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,[...]

60 SCXG-S VX0 1B-EN a temporary manual override menu. See Figure I-P-4. 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 Oper ation for T emporary Manual Override Menu The keypad has the same function in tempora[...]

SCXG-SVX0 1B-EN 61 T emporary Ov er r ide 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 ru[...]

62 SCXG-S VX0 1B-EN T able I-P -1 . Zone sensor BA Y SENS01 9 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 = enabled 4 supply air tempering 0 = disabled 0 1 = enabled 5 time clock 0 = [...]

SCXG-SVX0 1B-EN 63 pr ogramming Installation T able I-P -2. Zone sensor BA Y SENS020 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 = enabled 4 heat installed 0 = no 0 1 = yes 5 time clo[...]

64 SCXG-S VX0 1B-EN pr ogramming Installation Icon Descr iptions BA Y SENS0 19 Icon Descr iptions Refer to Figure I-P-9 for 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 Program Menu). 3. Fo[...]

SCXG-SVX0 1B-EN 65 pr ogramming Installation Figur e I-P -1 0 . BA YSENS020 complet e icon display BA Y SEN020 Icon Descriptions Refer to Figure I-P-10 for 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. 3. Four digits use[...]

66 SCXG-S VX0 1B-EN Pr ogramming the Time Cloc k Option Setting the Time Important: Depress the reset key before beginning to set time and program. 1 . S elect military (24:0 0 hr .) or AM/PM (12:00 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 displa[...]

SCXG-SVX0 1B-EN 67 Unit Start up Procedur es      W ARNING Hazardous V oltag e w/Capaci- tors! Disconnect all electric po wer , including remote disconnects before servicing. Follow proper lockout/tagout proce- dures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing component[...]

68 SCXG-S VX0 1B-EN Installation Startup Log Complete this log at unit startup. Unit: ____________________________ Unit Location: _________________________________________ Unit V oltage: __________ __________ __________ A B C Evaporator: evaporator fan motor horsepower: __________ evaporator fan motor amps: __________ __________ __________ A B C ev[...]

SCXG-SVX0 1B-EN 69 Installation star tup ___________________________________________________________________________________________________________________________ Water Cooled Units: Circuit A: entering water temperature °F: __________ leaving water temperature °F: __________ entering water pressure, psig: __________ leaving water pressure, psi[...]

70 SCXG-S VX0 1B-EN Operation general information Binary outputs • V .O . relay P oints List - T racer TM LCI-I Module Constant V olume (CV) Points Binary inputs • Air side economizer enable/disable • Condensor type (air or water cooled) • Condensor water flow status • Emergency shutdown • Local fan switc h enable/disable • Mec hanica[...]

SCXG-SVX0 1B-EN 71 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 specifi[...]

72 SCXG-S VX0 1B-EN T able O-GI-2. RTM sensor r esistance vs. t emperat ure temperature, °F resistance, Ω ohms temperature, °F resistance, Ω ohms -40 346.1 7 1 1 1 .60 -30 241 .7 7 2 1 1 .31 -20 170.1 7 3 1 1 .03 -1 0 121 .4 7 4 1 0.7 6 - 5 1 03.0 7 5 1 0.50 0 87 .5 6 7 6 1 0.25 5 7 4.65 7 7 1 0.00 10 63.8 7 8 9.76 1 5 54.66 7 9 6.53 2 0 46.94 [...]

SCXG-SVX0 1B-EN 73 Compr essor Module (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. Human[...]

74 SCXG-S VX0 1B-EN Figur e O-GI-2. V elocity pr essur e transducer/ solenoid assembly PURGE sequence “D” This sequence can purge the air out of a building before coming out of unoccupied mode of operation in a V A V system. Also, it can be used to purge smoke or stale air. • Supply fan – on • Supply fan VFD – on (60 hz) • Inlet guide[...]

SCXG-SVX0 1B-EN 75 Gener ic Building A ut omation 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 foll[...]

76 SCXG-S VX0 1B-EN T able O-GI-6. GBAS analog input setpoints control parameter signal range setpoint range occupied zone cooling setpoint 0.5 to 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 V AV) occupied zone heating setpoint 0.5 to 4.5 vdc 50 to 90°F (CV units only) unoccupied zone hea[...]

SCXG-SVX0 1B-EN 77 W aterside Components Waterside components consist of water piping, water valves, water flow switch option, water cooled condensers (SXWF only), and the economizer option. Water Purge This user-definable feature allows the user to select a purge schedule to automatically circulate water through the economizer and condensers perio[...]

78 SCXG-S VX0 1B-EN Condenser 1 Condenser 2 V2 Condenser 2 V1 Economizer Condenser 1 Condenser 2 V2 Figure O-GI-3. Basic water piping, constant water flow Figure O-GI-4. Intermediate w ater piping, variable water flow Figure O-GI-5. Intermediat e piping with waterside economizer , v ar iable or constant water flow general information economizer val[...]

SCXG-SVX0 1B-EN 79 Unit Airside Components The unit’ s air deli very system consists of 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 have the IGV or VF[...]

80 SCXG-S VX0 1B-EN stage of cooling, in occupied or unoccupied mode and when ambient conditions are favorable for economizing. Inherent in the unit controller is the ability to suppress the setpoint below the normal unit setpoint. This allows the building to improve comfort levels when possible, and at the same time, optimize building mechanical c[...]

SCXG-SVX0 1B-EN 81 peak operating efficiency . An outside air temperature and relative humidity sensor are provided for field installation to monitor reference enthalpy . Economizer operation enables when the outside air enthalpy is less than 25 BT u/lb (adjustable 1 9-28 BT u/lb.). During occupied mode, the outside air damper opens to 15% (adjusta[...]

82 SCXG-S VX0 1B-EN 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. W ater Pur ge NO TICE Pr oper W ater T r eatment! The use of untr eated or impr oper ly treated water in[...]

SCXG-SVX0 1B-EN 83 W at er -cooled: Units without WSE, the condenser valve modulates to maintain an average saturated condenser tem- perature. Units with WSE, if economizing and mec hanical cooling is necessary the economize valve will sacrifice free cooling and modulate to maintain condensing saturated temperature. If not economizing, the condense[...]

84 SCXG-S VX0 1B-EN 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 accepts[...]

SCXG-SVX0 1B-EN 85 seq uence of operation is reached. Next a 60 minute timer begins. If the building load reaches the MWU ventilation setpoint, or the 60 minutes expire, whichever is first, the airside economizer will control to the minimum position. MWU will end when the zone temperature rises above the MWU terminate setpoint. Timed Over r ide Act[...]

86 SCXG-S VX0 1B-EN seq uence of operation Occupied Sequence 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 YSENS108, BA YSENS1 1 0, BA YSENS0 1 9, or BA YSENS07 4). For a complete list of unit setpoint default value[...]

SCXG-SVX0 1B-EN 87 seq uence of operation Mechanical Cooling If the zone temperature cannot be maintained within the setpoint deadband using the economizer option or if there is no economizer , the R TM sends a cooling request to the MCM. The compressor module checks the compressor protection circuit before closing stage one. After the first functi[...]

88 SCXG-S VX0 1B-EN Compressors Units use two sizes of hermetic scroll compressors, 10 and 15 hp, and can use from two to six compressors. When viewing the front of the unit, compressors are identified A through B from left to right. The second compressor from the left, or B compressor , is alw ays the fir st to come on, unless locked out for a mal[...]

SCXG-SVX0 1B-EN 89 Low Ambient Compressor Lock out This function will lock out the compressor if the outdoor air temperature sensor reads an outdoor temperature below the low ambient compressor lockout temperature setpoint. This setpoint is adjustable at the human interface panel. Compressors will lock out when outdoor air temperature falls below t[...]

90 SCXG-S VX0 1B-EN seq uence of operation Figure O-SO-2. T ypical pulldown curve for unit oper ating proper ly within control band Figur e O-SO-3. T ypical pulldown curve for unit oper ating improper ly outside control band Service V alve Option If ordered, service valves are factory installed on each circuit before and after the compressor to all[...]

SCXG-SVX0 1B-EN 91 T able M-GI-1. SCWG/SIWG/SCRG/SIR G General Maint enance Data Water -Cooled Units Air -Cooled Units Unit Size 2 0 2 5 3 0 3 5 2 0 2 5 3 2 Compressor Data Quantity 2 2 1 /1 2 2 1/1 2 Nominal T on/Comp 10 10 10/15 15 10 10/15 15 Circuits 2 2 2 2 2 2 2 Evaporator Coil Data Rows 2 4 4 4 3 4 4 Sq. Ft. 22.5 25.0 25.0 25.0 25.0 25.0 25.[...]

92 SCXG-S VX0 1B-EN Maint enance Procedur es Air Filters Filter access doors are on the unit’ s lef t side. Filter access for the 2” filter rack on optional steam and hot water coils and airside economizers is also on the left side Figure M-MP -1 . Unit Filt er Sizes and Placement f or SXWG 20-38 tons or SXRG 20-40 tons without steam or hot wat[...]

SCXG-SVX0 1B-EN 93 Inspecting and Cleaning the Drain Pan Check the condensate drain pan and drain line to ensure that the condensate drains properly at least every six months or as dictated by operating experience. If evidence of standing water or conden- sate overflow exists, take steps to identify and remedy the cause immediately . Refer to the t[...]

94 SCXG-S VX0 1B-EN V ar iable Frequency Dr ive (VFD) The VFD access panel is hinged to allow service access to the fan motor and belt drive components that are located behind it. T o swing the panel open: • Remove the unit center cover panel to the left of the VFD panel. • Remove and discard the sheet metal shipping screws along the top and bo[...]

SCXG-SVX0 1B-EN 95 F an Bear ings 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. Follow the fan bearing lubrication sc hedules in T ables M-MP -1 and M-MP -2. Use T able M-MP -3 to reference compatible fan bearing grease for spe[...]

96 SCXG-S VX0 1B-EN T able M-MP -4. F an shaft bear ing tor ques setscrew hex -size recommended torque size across flats In-lb ft-lb 1/4"-20 1/8" 180 15 5-16"-18 5-32" 402 33.5 T able M-MP -5. F an hub and sheav e tor ques unit fa n setscrew torque size dia. size (ft-lbs) SCWF 20 16.5" 5 / 16 " 1 2 SCWF 22 SCWF 25 SCRF[...]

SCXG-SVX0 1B-EN 97 Adjusting Belt T ension NO TICE Do not over -tension belts. Ex ces- sive belt t ension will reduce f an and motor bear ing lif e, acceler ate belt wear , and possibly cause shaft f ailur e. T o adjust belt tension refer to Figure M- MP-6 and perform the following procedure: 1. Loosen bolts A, B, and E on both sides of the sliding[...]

98 SCXG-S VX0 1B-EN • 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.      W ARNING Confined Space Hazards! Do not work in confined spaces where sufficient quantities of refrigerant or other hazardou[...]

SCXG-SVX0 1B-EN 99      W ARNING Leak T esting! Do not exceed 200 psig when leak testing system. Failure to follow these instructions could result in an explosion causing death or ser ious injury . In the event of required system repair , leak test the liquid line, evaporator coil, and suction line at pressures dictated by local code[...]

100 SCXG-S VX0 1B-EN Figure M-MP -1 0. T ypical water -cooled (SXWF) compressor section components T o c harge the system, complete the following procedure: 1 . Charge liquid refrigerant into the liquid line service valve of eac h compressor circuit. The vacuum will draw some of the required refrigerant into the system. See Figure O-M-9. 2. Complet[...]

SCXG-SVX0 1B-EN 101 Coil Fin Cleaning Keep coils clean to maintain maximum performance. For operation at its highest efficiency , clean the refrigerant coil of ten 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 visible. R[...]

102 SCXG-S VX0 1B-EN Inspecting and Cleaning Coils Coils become externally fouled as a result of normal operation. Coil surface dirt reduces heat transfer ability and can cause comfort problems, increased airflow resistance and thus increased operating energy costs. Inspect coils at least every six months or more frequently as dictated by operating[...]

SCXG-SVX0 1B-EN 103 1 . Remove actuator motor from suppor t plate. 2. Remove shaft coupling. 3. T orque the pac king nut to 1 0-ft.-lbs. of torque. 4. Replace shaft coupling. 5. Replace actuator motor . Flow Switch Maintenance Flow switches have a magnet on the vane assembly that attracts ferrous particulate may build up on the magnet to the point [...]

104 SCXG-S VX0 1B-EN Maint enance P er iodic Checklists Monthly Checklist The following check list provides the recommended maintenance schedule to keep the commercial self-contained equipment running ef ficiently .      W ARNING Hazardous V oltag e w/Capaci- tors! Disconnect all electr ic power , including remote disconnects before [...]

SCXG-SVX0 1B-EN 105 System Checks      W ARNING Live Electr ical Components! During installation, testing, servicing and troubleshooting of this product, it may be necessary to work with live electrical components. Have a qualified licensed electrician or other individual who has been properly trained in handling live electrical comp[...]

106 SCXG-S VX0 1B-EN Diagnostics Refer to the IntelliPak Self-Contained Programming Guide, PKG-SVP01B-EN, for specific unit programming and troubleshooting information. In par ticular , reference the “Service Mode Menu” and “Diagnostic Menu”sections in the programming guide. Refer to the following text for general diagnostic and troubleshoo[...]

SCXG-SVX0 1B-EN 107 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 of field-provided contacts, switch, etc. [...]

108 SCXG-S VX0 1B-EN 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 allowable range for 10 seconds. Heat Module Comm Failure Problem: The RTM has lost communication with the heat module. Check: Chec[...]

SCXG-SVX0 1B-EN 109 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 sensor input is out of range. (This input is at the NSB panel, not on the unit itself). Check: If have an external sensor connected to the NSB panel zone sensor input, [...]

110 SCXG-S VX0 1B-EN RTM A ux. T emp. Sensor F ailure Problem: The RTM auxillary temperature sensor data is out of range. Check: Sensor resistance should be between 830 ohms (200°F)and 345.7 ohms (-40°F). If so, check field/unit wiring between sensor and RTM. Reason for Diagnostic: At least one enabled unit function has the RTM auxillary temperat[...]

SCXG-SVX0 1B-EN 111 Supply Air T emp Cool Setpoint F ail 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 out is out of range (temp < 35°F or temp > 95°F). UCM Reaction: The default HI-set SA temp cooling setpoint becomes the active SA[...]

112 SCXG-S VX0 1B-EN Reset R equired: (P AR) An automatic reset occurs after communication between T racer Summit and the LCI-I is restored. U Unit HI Communications Failure Problem: The RTM has lost communication with the unit mounted (local) human interface (HI). Check: Field/unit wiring between RTM hand local HI. Reason for Diagnostic: The RTM h[...]

SCXG-SVX0 1B-EN 113 • A “fan off ” request to “supply fan control” • A “close damper” request to “economizer actuator control” • The water pump to turn on and position all water valves to provide maximum flow through all water source heat exchangers • Disables preheat function if WSM mixed air temp sensor is selected as preh[...]

114 SCXG-S VX0 1B-EN[...]

SCXG-SVX0 1B-EN 115[...]

www.trane.com For more information, contact your local T rane office or e-mail us at comfort@trane.com Literature Order Number Date Supersedes T rane has a policy of continuous product and product data improvement and reserves the right to c hange design and specifications without notice. SCXG-SVX0 1B-EN March 2008 SCXG-SVX01B-EN July 2000[...]