Trane BCHC manual

Apr il 20 08 BCX C-S VX0 1B-EN Installation, Oper ation, and Maint enance Blo w er Coil Air Handler Air T er minal Devices - 40 0 t o 30 0 0 cfm Models BCHC and BCV C “ AO ” and later design sequence[...]

© 20 08 T rane All rights reserved BCXC-SVX0 1B-EN W ar nings, Cautions and Notices W ar nings, Cautions and Notices. Note that warn ings, cautions and notices appear at appropriate interva ls throughout this man ual. W arn ings are pro vide to aler t installing contractors to potential haza rds that could resul t in person al injury or deat h. Ca[...]

BCXC-SVX0 1B-EN 3 W ar nings, Cautions and Notices  W ARNING Hazard of Explosion and Deadly Gases! Never solder , braze or w eld on r efriger ant li nes or any unit compon ents that ar e abo ve atmospher ic pressur e or wher e refr iger ant may be pr esent. Alwa ys remov e r efrig erant b y following the guidelines establish ed by the EP A Feder[...]

Intr oduction 4 BCXC-SVX0 1B-EN About This Manual Use this manual for comm ercial blower coil models BCHC and BCVC. This is the second version of this manual; thi s manual supercedes BCXB-SVX0 1A-EN. It provides specific in stallation, operation, and main tenance instructions for “ AO” and later design sequences. For previous design sequen ce i[...]

T able of Cont ents BCXC-SVX0 1B-EN 5 Model Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . [...]

6 BCXC-SVX0 1B-EN Steam Pipi ng . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Controls Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

BCXC-SVX0 1B-EN 7 Following is a complete descrip tion of the blower coil model number . Eac h digit in the model nu mber has a cor responding code that identifies specific unit op tions. Digits 1, 2, 3, 4 — Unit Model BCHC= horizontal blower coil BCVC= vertical blower coil Digits 5, 6, 7 — Unit Siz e Digit 8 — Unit V oltage Digit 9 —Insula[...]

8 BCXC-SVX0 1B-EN Model Number Descr iption Digit 24 — Filters 0 = no ne A = 1” throwaway B = 2” pleated th rowaw ay Digit 25 — A ccessory Section Digit 26 — Control T ype 0 = no cont rols (4 x 4 junction box) 1 = control interface 2 = T racer™ ZN0 1 0 3 = T racer ZN51 0 4 = T racer ZN520 Digit 27 — Unit Coil #1 Contr ol Va l v e 0 = [...]

BCXC-SVX0 1B-EN 9 Gener al Inf or mation Blo wer Coil Gener al Inf or mation Blower coil units are draw -thru air handlers for cooling load conditions of 400–30 0 0 cfm. Units are available in either horizontal (model BCHC) or vertical (model BCVC) configurations. Horizontal units are typically ceiling suspen de d via threaded rods. Knoc kouts ar[...]

10 BCXC-SVX0 1B-EN Gener al Infor mation a control valve and stop (ball) va lves. The deluxe pac k age consists of a control valve, a stop (ball) valve, a circuit se t ter , and strainer . Belt-drive motor s range from 1/3 to 3 horsepower in a wide range of voltages. All motors have internal thermal and current over loads, permanently sealed ball b[...]

BCXC-SVX0 1B-EN 11 Pr e-Installation Receiving and Handling Blower coil units are pac k aged for easy handling a nd storage on the job site. Upon deli very , inspect all components for po ssible shipping damage. See the “Receiving Chec klis t” section (below) for detailed instructions. T rane reco mmends leaving units and accessori es in their [...]

12 BCXC-SVX0 1B-EN Pr e-Installation Installation Pr eparation Before installing the un it, perf orm the following procedures to ensure pro per unit operation. 1 . V erify the floor or foun dation is level. Shim or repair as necessary . T o ensure proper unit operation, install th e unit level (zero tolerance) in both horizontal axes. F a ilure to [...]

BCXC-SVX0 1B-EN 13 Pr e-Installation Rigging and Handling Before preparing the unit for lifti ng, estimate the approximate center of gravi ty for lifting safety . Because of place ment of internal components, the unit weight may be unevenly distributed , with more weight in the coil area. Appr oximate unit weights are given in “Dimensions and W e[...]

14 BCXC-SVX0 1B-EN Pr e-Installation 1 . Consider the unit weig ht. Reference the unit weight on the unit nameplate or in “Dimensions and W eights, ” p. 15 . 2. Allow sufficient space for the recommen ded clearances, acce ss panel remo val, and maintenance acce ss. R efer to Figure 2, p. 13 . 3. The installer must provide thr eaded suspension r[...]

BCXC-SVX0 1B-EN 15 Dimensions and W eights Hor izontal Blo wer Coil T able 2. Hor iz ontal blow er coil dimensions (in.) and w eights (lb) Unit size H W L A B C D E F G (RH) G (LH) J (RH) J (LH) K M P Q Basic unit weight 12 14.00 24.00 39.75 12.09 18.00 10.56 7.09 0.55 3.00 11.42 13.42 9.42 11.42 4.20 8.46 9.00 5.75 70.40 18 14.00 28.00 39.75 12.09[...]

16 BCXC-SVX0 1B-EN Dimensions and W eights V ertical Blo wer Coil T able 3. V ertical blo wer coil dimens ions (in.) and w eights (lb) Unit size H W L A B C D E F G (RH) G (LH) J (RH) J (LH) K M N P Q R Basic unit weight 24 63.50 28.00 44.00 16.09 22.00 13.56 12.56 1.30 3.00 11. 42 13.42 9.42 11.42 6.20 5 .50 18.00 9.00 5.50 28.00 150.30 36 63.50 4[...]

BCXC-SVX0 1B-EN 17 Dimensions and W eights Angle Filter and Mixing Bo x T able 4. Angle filter and mixing bo x dimensions (in.) and weights (lb) Unit size H L W A B Weight 12 14.12 22.00 24.11 7.06 15.56 36.0 16 14.12 22.00 28.11 7.06 19.56 41.0 24 18.12 19.50 28.11 7.06 19.56 43.0 36 18.12 24.50 40.11 7.06 31.56 56.0 54 22.12 23.50 40.11 12.81 31.[...]

18 BCXC-SVX0 1B-EN Dimensions and W eights Bot tom or T op Access Filt er Bo x T able 5. Bot tom o r top access filt er bo x dimensions (in.) and w eights (lb) Unit size H W A B C D Weight 12 14.00 24.00 9.98 2.01 18.23 2.88 15 18 14.00 28.00 9.98 2.01 21.98 3.01 17 24 18.00 28.00 14.23 1.89 23.23 2.38 18 36 18.00 40.00 14.23 1.89 33.73 3.13 25 54 [...]

BCXC-SVX0 1B-EN 19 Dimensions and W eights Electr ic Heat T able 6. Electric heat dimensions (in.) and weights (lb) Unit size H W A B C D E Weight 12 14.06 17.88 8.13 6.79 10.50 7.75 0.03 10.0 18 14.06 19.88 10.13 8.79 10.50 7.75 0.03 10.8 24 18.06 21.25 7.63 6.29 13.50 12.63 0.80 11.3 36 18.06 27.25 13.63 12.29 13.50 12.63 0.80 12.8 54 18.06 27.25[...]

20 BCXC-SVX0 1B-EN Dimensions and W eights Steam Coil T able 7 . Steam coil bo x dimensions (in.) and w eights (lb) Unit size Coil Connections, NPT H W A B C Weight Supply Return 12 14.00 24.00 12.06 18.04 2.98 34 1 3/4 18 14.00 28.00 12.06 22.04 2.98 37 1 3/4 24 18.00 28.00 16.06 22.04 2.98 40 1-1/2 1 36 18.00 40.00 16.06 34.04 2.98 48 1-1/2 1 54 [...]

BCXC-SVX0 1B-EN 21 Dimensions and W eights Coil Connections T able 8. Hydronic coil connection sizes, OD (in.) Unit size Standard capacity High capacity 1-row 4-row 6-row 2-row 4-row 6-row 12 5/8 - - 5/8 7/8 7/8 18 5/8 - - 5/8 7/8 7/8 24 5/8 - - 7/8 1-1/8 1-1/8 36 7/8 - - 7/8 1-1/8 1-1/8 54 1-1/8 1-3/8 1-3/8 1 -1/8 1-1/8 1-1/8 72 1-1/8 1-3/8 1-3/8 [...]

22 BCXC-SVX0 1B-EN Dimensions and W eights Piping P ac kag es Basic Piping T w o-wa y , 1/2” and 1” v alv e basic piping pac kage T w o-wa y , 1 -1/4” v alv e basic piping pack age Thr ee-wa y , 1/2” and 1” v alve basi c piping pack age A B A B B B A AB A E A B AB A B E F[...]

BCXC-SVX0 1B-EN 23 Dimensions and W eights Deluxe Pipi ng T w o-wa y , 1/2” and 1” v alv e deluxe piping pack age T w o-way 1 -1/4” v alve delux e piping packag e A B C D D E B A AB C[...]

24 BCXC-SVX0 1B-EN Dimensions and W eights Thr ee-wa y , 1/2” an d 1” valv e deluxe pipi ng packag e T able 1 1 . Piping package dimensions (in.) Piping package Nominal tube size Actual size A B C D E F 2-way 1/2 5/8 12.025 2.650 12.625 5.650 N/A N/A 1 1-1/8 13.295 4.260 13.220 9.288 3.020 N/A 3-way 1/2 5/8 12.088 2.097 12.688 4.497 6.351 6.351[...]

BCXC-SVX0 1B-EN 25 Installation Contr ols Installing W all Mounted Contr ols W all mounted z one sensors ship ta ped to the control box. R efer to Figure 3 for zone sensor dimensions. P ositi on the controller on an inside wall three to five feet above the floor and at least 18 inc hes from the nearest outside w all. Installing th e controller at a[...]

26 BCXC-SVX0 1B-EN Installation Contr ols b. P ull the control wires throug h the cutout. Attac h the module to the wall using the screw s provided. 5. Strip the insulation on the interconnectio n wire s bac k 0.25 inc h and connect to TB1 . Screw down the terminal bloc ks. 6. Replace the z one sensor cover and adjustment knob. If installing a T ra[...]

BCXC-SVX0 1B-EN 27 Installation Contr ols P eer -to-peer com munication acro ss controllers is possible even when a building automation system is not p resent.Y ou do not need to ob serve polarity for Comm5 commun ication lin ks. The controller p rovides six 0.25-inc h quic k-conn ect terminals for the Co mm5 communication link connections, as foll[...]

28 BCXC-SVX0 1B-EN Installation Electr ical Unit Wir ing Diagr ams Specific unit wiring d iagrams are provided on th e inside of the control panel door . T ypical unit wiring diagrams are in “Wiring Diagrams, ” p. 81 . Use these diag rams for connections or trouble analysis.  W ARNING Gr ounding Requir ed! Foll ow pr oper local and state ele[...]

BCXC-SVX0 1B-EN 29 Installation Electr ical 3. If the unit has a electric heat: power an d ground connection s are inside the elec tric heat control box, connected to a non-fused di sconnect switc h or termina l bloc k. Electr ical Gr ounding Restr ictions  W ARNING Hazardous V oltag e! Disconnect all electr ic po wer , including r emote disconn[...]

30 BCXC-SVX0 1B-EN Installation Electr ical See Ta b l e 1 3 for electric heat kW and T able 1 4, p. 31 for motor FLAs. Select a st andard fuse size or HA CR type circuit break er equal to the MCA. Use the next larger standard size if the MCA does not equal a standard siz e. Standard fuse sizes are: 15, 20, 25, 30, 35, 40, 45, 50, 60 amps Useful Fo[...]

BCXC-SVX0 1B-EN 31 Installation Electr ical T able 14. Motor electr ical data Voltage Voltage range rpm Rated hp lb FLA LRA 115/60/1 104–126 1750 1/3 18 5.8 22.8 1/2 21 7.2 30.4 3/4 29 12.0 58.4 1.0 29 12.8 58.4 Two-speed 115/60/1 104–126 1750/1160 3/4 40 8.9/6.1 42.0 1.0 41 11.5/8.1 58.2 208–230/60/1 187–253 1750 1/3 18 3.1 11.4 1/2 21 3.6[...]

32 BCXC-SVX0 1B-EN Installation Electr ical 220/50/1 198–242 1450 1/3 20.5 3.0 15.6 1/2 25 3.6 20.5 3/4 29 5.2 25.6 1.0 38 9.3 52.2 240/50/1 216–264 1450 1/3 20.5 3.3 17.1 1/2 25 4.0 22.7 3/4 29 5.5 39.1 1.0 38 10.6 57.8 190/50/3 171–209 1450 1/3 22 1.1 5.6 380/50/3 342–418 1/2 26 1.4 7.8 3/4 28 1.7 9.8 1.0 29 2.1 14.6 1.5 34 2.8 18.7 2.0 4[...]

BCXC-SVX0 1B-EN 33 Installation Mec hanical  W ARNING Hazardous V oltag e! Disconnect all electr ic po wer , including r emote disconnects befor e servicing. Fo llow pr oper lock out/tag out pr ocedures t o ensur e the pow er can not be inadv ertently ener gized. F ailur e to disconnect power bef ore servicing could result in death or serious in[...]

34 BCXC-SVX0 1B-EN Installation Mechanical 4. Guide the threaded rod through the unit from the top, careful not to damage insulation or wiring. See Figure 5 . Inser t the threaded rod at an angle to help prev ent internal u nit damage. 5. Put a nut and large flat w asher or steel pl ate on the bottom of the threaded rod. See Figure 6 . 6. Put a nut[...]

BCXC-SVX0 1B-EN 35 Installation Mechanical required. Th e unit is shipped in two pieces, and ca n be arranged in either a pre-swirl or counter - swirl inlet configurati on (see Figure 7 ). Heating Coil Option Note: The hy dronic heating coil option is factory inst alled in either the rehe at or preheat positi on. Coils can be rotated for either rig[...]

36 BCXC-SVX0 1B-EN Installation Mechanical • interconnec ting linkage, LH or RH at tac hment Mater ials needed: • grooved and extendible drive rods, 1/2-inc h O .D. grooved • screws The mixing box option ships separat ely for field installation. It has two low-leak , opposed blade dampers and all necessary intercon necting linkage components [...]

BCXC-SVX0 1B-EN 37 Installation Mechanical Plug or trap the auxili ary connection to prevent air from being drawn in and causing carryover (see Figure 8 ). All drain lines downstream of the trap must flow continuously downh ill. If segments of the line are routed uphill, th is can cause the drain line to be come pressurized. A pressuri zed drain li[...]

38 BCXC-SVX0 1B-EN Installation Piping W ater Coil Connections W ater coils have sw eat connections. Reference co il connection dimensions in “Dimensions and We i g h t s , ” p . 1 5 . Proper installation and pi ping is necessary to e nsure satisfactory coil op eration and prevent operatio nal damage. W ater inlet an d outlet connections extend[...]

BCXC-SVX0 1B-EN 39 Installation Piping diameter mu st be as small as possible, while stil l providing at least 5°F [2.7°C] of subcooling at the expansion valve througho ut the operating envelope. Routing. Install the liquid line with a sligh t slope in the direction of flow so that it can be routed with the suction lin e. Minimize tube b ends and[...]

40 BCXC-SVX0 1B-EN Installation Piping Routing. T o prevent residual or co ndensed refrigerant from “f ree-flowing ” toward the compressor , install the suct ion line s o it slopes slightly—1 inc h per 1 0 feet of run [1 cm per 3 m]— toward the evaporator . Av oid putting refrigeran t lines underground. R efrigerant condensation, installati[...]

BCXC-SVX0 1B-EN 41 Installation Piping Steam Piping Proper installation, pi ping and trapping i s necessary to insur e satisfactory heatin g coil operation and prevent opera tional damage un der service co nditions. These installation rec ommendations and piping diagram (see Figure 1 1, p. 42 ) must be followed to assu re satisfactory , trouble-fre[...]

42 BCXC-SVX0 1B-EN Installation Piping 6. Do not modulate steam or use on-off supply control on system s with overhead or pressurized returns unless condensate is drained by grav ity to recei ver (vente d to atmosphere) and returned to main by condensate pump. 7 . At startup with dampers, slowly turn steam on full for at least 1 0 minute s before o[...]

BCXC-SVX0 1B-EN 43 Contr ols Int erf ace Contr ol Options Blower coil air h andlers are available wi thout controls or with on e of four different control options: • Control interface • T racer™ Z N0 1 0 • T racer ZN51 0 • T racer ZN52 0 Units without contro ls have a junction box m ounted on the drive side for motor power wire terminatio[...]

44 BCXC-SVX0 1B-EN Contr ols Interf ace • Zone setpoint • Current z one temperature • Fan mode selection (of f-auto-high-low) For optimal system performance, blower coil uni ts can operate as part of an In tegrated Comfort™ Sys t em ( I CS ) b ui l d in g au t o ma t io n s ys t e m c o nt r o ll e d by T ra ce r S um m it ® . Th e co n t [...]

BCXC-SVX0 1B-EN 45 Co n t ro l s I nte r fa ce T able 16. T racer contr oller function summary Tracer™ Controller ZN010 ZN510 ZN520 Control functions Entering water temp. sampling (purge) • • • Timed overri de • • • A u t o c h a n g e o v e r ••• F an cycling • • W a r m - u p ••• P r e - c o o l ••• Data sharin[...]

46 BCXC-SVX0 1B-EN Pr e-Star t Pr e-Star t Checklist Complete this c hec klist af ter inst alling the unit to verify a ll reco mmended installation proced ures are complete before unit startup. This does not replace the detaile d instructions in the appropria te sections of this ma nual. Disconnect elect rical powe r before perfor ming this c heckl[...]

BCXC-SVX0 1B-EN 47 Pr e-Start Component Overview  V erify the fan and moto r shafts are parallel.  V erify the fan and motor sheaves are aligned.  Chec k the belt tension for proper adjustment. Adju s t the belt tension if it is floppy or squeals continually .  Ensure the fan ro tates freely in the cor rect direction.  Tighten loc ki[...]

48 BCXC-SVX0 1B-EN Star t-Up Sequence of Oper ation T racer ZN Contr oller Sequence of Operation Contr oller Start-Up Refer to T rane public ation CNT -SVX04A-EN, Installation, Operation, an d Programming Gu ide , to operate the T racer™ ZN controller with T rane In tegr ated Comfort™ S ystem (ICS). The factory pre- programs the T racer ZN cont[...]

BCXC-SVX0 1B-EN 49 Start-Up 3. Default operation of the controller (oc cupied mode) 4. Communicated request, usuall y provided by th e buildi ng automation system (BAS) or peer device (available on T rac er™ ZN51 0 and ZN520 only) A communicated request will control the controller’ s occupancy . T ypically , this request comes from the BAS time[...]

50 BCXC-SVX0 1B-EN Start-Up enabled (T racer™ ZN520 only) and po ssible, it is the primary cooling capacity . If hydronic heat ing is possible, it will be the primary heating capacity . Occupied Standb y Mode (T racer Z N51 0 or ZN520 only) The controller can b e placed into the occupied standby mode when a commun icated occupancy request is comb[...]

BCXC-SVX0 1B-EN 51 Start-Up Note: Unit diagnostics can affect fan operati on, causing occupied and occu pied standby fan operation to be defin ed as abnormal. Refer to “T roubleshooting, ” p. 72 for more information about abnormal fan op eration. Economiz er Cooling (T racer Z N520 Only) The econom izer pro vides cooling whenever the outdo or t[...]

52 BCXC-SVX0 1B-EN Start-Up heating capacity of the unit (0–1 0 0%). The outputs are control led based on the unit configuration and the required heating capacity . F an Mode Oper ation WA R N I N G Rotating Components! Disconnect all electr ic po wer , including r emote disconnects befor e servicing. Fo llow pr oper lock out/tag out pr ocedures [...]

BCXC-SVX0 1B-EN 53 Start-Up Additional flexibility built into the controller allo ws you to enable or disa ble the local fan switc h input. The fan mo de request can be hardwir ed to any of the T racer™ ZN controller s or communicated to the T racer ZN51 0 or ZN520 cont roller . When b oth inpu ts are present, the communicated request ha s priori[...]

54 BCXC-SVX0 1B-EN Start-Up F an Cycling Oper ation T racer™ ZN520 does not support fan cycling in occu pied mode. The fan cycles between high speed and off in the uno ccupied mode only . The cont roller ’ s cascade cont rol algorithm requires continuous fan opera tion in the occupi ed mode. Fa n O ff D e l a y When a heating output is controll[...]

BCXC-SVX0 1B-EN 55 Start-Up T wo- and F our -Pipe Changeo ver Oper ation T racer™ ZN controllers of fer accurate and reli ab le unit c hangeover usin g 2-way valves and the controller ’ s entering water temper ature sampli ng function. Only un its using the mai n hydronic coil for both heatin g and cooling (2-pip e and 4-pipe c hangeover units)[...]

56 BCXC-SVX0 1B-EN Start-Up flows normally and frequ ently through the coil, the cont roller does not inv ok e the sampling function because the EWT is satisfactory . However , when the controller dete cts an incorrect water temperature base d on heating or cooling mode, it inv okes the entering water temperature sampling func tion. For exampl e, w[...]

BCXC-SVX0 1B-EN 57 Start-Up temperature rises 5°F above the economiz er enable point, the controller di sables economizing and moves the fresh air damper bac k to its predete rmined minimum posi tion based on the current occupancy mode or commu nicated minimum da mper position. T racer Dehumidification (T r acer ZN520 Only) Dehumidifica tion is po[...]

58 BCXC-SVX0 1B-EN Start-Up temperature diagnostic when dete cting low temperature. In addition, T racer ZN controls unit devices as listed below: Fan : Off V alves: Open Electric heat: Off Damper: Closed Note: See the “Diagnostics” sectio n for more infor mation. BIP2: Condensat e Overflo w Detection Op tion The factory hard wires th e condens[...]

BCXC-SVX0 1B-EN 59 Start-Up Analog Inputs See Ta b l e 2 8 for a complete descripti on of analog inputs. Binary Outputs Binary outputs are confi gured to support the following: • T wo fan stages (when one or two fan stages are present, J1-2 can be co nfigured as exhaust fan) • One hydronic coolin g stage • One hy dronic heating stage (dehumid[...]

60 BCXC-SVX0 1B-EN Start-Up Zone Sensor The T racer™ ZN controller accepts the following z one sensor module inputs: • Space temperature measurement (1 0kW thermistor) • Local setpo int (either internal or external on the zone sensor module) • Fan mode switc h • Tim ed over ride, using “ on ” and “cancel” buttons (T racer ZN51 0 a[...]

BCXC-SVX0 1B-EN 61 Start-Up temperature value exists, the cont roller ig nores the ha rdwired space tempera t ure input and uses the communicated value. Local Setpoint The z one sensor may be equipped with a th umbwheel for setpoint adjustment. F an Mode S witch The z one sensor may be equipped with a fan mode switc h. The fan mode sw itc h offers [...]

62 BCXC-SVX0 1B-EN Start-Up When the fan switc h is in the of f position, the cont roller does not control an y unit capacity . The unit remains powered and all outpu ts dri ve to the closed position. Upon a loss of signal on the fan speed input, the controller repor t s a diagnostic and rever ts to using the default fan spee d. On/Cancel But tons [...]

BCXC-SVX0 1B-EN 63 Maint enance Maintenance Pr ocedur es P erform the following maintenance procedur es to ensure proper un it operation. Air Filters Always install filters with directio nal ar rows pointing tow ard the fan. F an Bear ings Fan bearings are permanently sealed and lubric ated and do n ot require additional lubrication. Fa n M o t o r[...]

64 BCXC-SVX0 1B-EN Maint enance sheaves and pull tight. Adjust sh eaves and tighten the shea ve set screws to the correct torques recommended in Ta b l e 3 1 . F an Assembly Set Scr ews Chec k and adjust fan wheel, bear ing, and sheave set screws when ever a component is removed or an adjustment is made. R efer to Ta b l e 3 1 for recommendations. [...]

BCXC-SVX0 1B-EN 65 Maint enance NO TICE Belt tension! Do not o ver -t ension belts. Excessi ve belt t ension will r educe f an and mot or bear ing lif e, accelera te belt wear , and could r esult in shaf t fa ilure. T a ble 32. BCHC/BCV C f an, filter , and mixing box g ener al data Unit size 12 18 24 36 54 72 90 Nominal cfm 400 600 800 1200 1800 2[...]

66 BCXC-SVX0 1B-EN Maint enance T able 34. BCHC/BCV C coil g eneral data Unit size 12 18 24 36 54 72 90 Nominal cfm 400 600 800 1200 1800 2400 3000 Hydronic & DX c oil data Area - ft 2 0.89 1.11 1.67 2.67 4.00 5.00 6.67 Width - in. (a), (b) 8 8 1 21 21 81 82 4 Length - in. (c) 16 20 20 32 32 40 40 V elocity - ft/min. 450 540 480 450 450 4 80 45[...]

BCXC-SVX0 1B-EN 67 Maint enance 6-row coil • Standard capacity Minimum gpm (e) N/A N/A N/A N/A 8.8 8.8 11.7 Maximum gpm (f ) N/A N/A N/A N/A 47.0 47.0 62.6 Dry coil weight - lb (g) N/A N/A N/A N/A 52.4 63.1 82.7 W et coil we ight - lb (g) N/A N/A N/A N/A 68.1 82.0 108.7 Internal volume - in 3 (g) N/A N/A N/A N/A 434.8 523.4 720.0 •H i g h - c a[...]

68 BCXC-SVX0 1B-EN Maint enance T able 35. Dr ive data Motor sheave Fan sheave Belt Fan rpm range Motor speed Drive letter Unit size Motor watts HP Browning Trane Browning Trane Br owning Trane 1750 (60 Hz) 1450 (50 Hz) 12, 18 186–1119 1/3 to 1-1/2 1VL40x5/8 X10090082090 AK74x3/4 X10070173270 A41 X1020025416 0 619–878 513–727 D AK64x3/4 X1007[...]

BCXC-SVX0 1B-EN 69 Maint enance Coil Maint enance Keep coils clean to maintai n maximum performa nce. For operation at its hi ghest efficiency , clean the coil often during perio ds of high demand or when dirty conditions pr evail. Clean the coil a minimum of once per year to prevent dir t buildup in the coil fins, where it may not be visible. Remo[...]

70 BCXC-SVX0 1B-EN Maint enance Winte r izing the Coil Make provisions to drain coils that are not in use, especially when subjected to freezing temperatures. T o drain the coil, fir st blow out th e coil with comp ressed air . Next, fill and dr ain the tubes with full- strength ethylene glycol seve ral times. Then d rain the coil as completel y as[...]

BCXC-SVX0 1B-EN 71 Maint enance 2. Visual ly inspect the entire unit casing for c hips or corrosi on. Remove rust or corrosion an d repaint surfaces. 3. Clean fan wheels and fan shaft. R emove any rust from the fan shaft with an emery cloth and recoat with L.P .S. 3 or equivalent. 4. Inspect the drainpan fo r sludge or other fore ign material. Clea[...]

72 BCXC-SVX0 1B-EN Diagnostics T r oubleshooting LED A ctivity Red Service LED The red LED normally indicates if the unit controller is op erating properly or n ot. Refer to Ta b l e 3 6 . Gr een Status LED The green LED normally indicates whether the controller is powered on (24 V AC supplied). R efer to Ta b l e 3 7 . Y ellow Comm LED The yellow [...]

BCXC-SVX0 1B-EN 73 Diagnostics Service LED section. Use R over™ service tool to restore the unit to no rmal operation. Refer to the Ro ver product litera ture for more information. Manual Output T est The purpose of th e manual output test sequence is to verify output and end device operation. Use the manual output test to: • V erify output wir[...]

74 BCXC-SVX0 1B-EN Diagnostics Diagnostics T ranslating Multiple Diagnostics The contro ller senses and records eac h diagnostic independently of other diagno stics. It is possible to have multiple diagno stics present simult aneously . The diagno stics are repor ted in the or der they occur . P ossible diagno stics include: T able 39. T racer ZN0 [...]

BCXC-SVX0 1B-EN 75 Diagnostics • Low temperature detection • Condensate overflow • Low air flow - fan status • Disc harge air temp limit • Space temper ature failure 1 • Entering water temp failure 1 • Disc harge air temp failure • Outdoor air temp failure 1 • Local setpoint failure 1 • Local fan mode failure 1 •C O 2 sensor f[...]

76 BCXC-SVX0 1B-EN Diagnostics Manual Output T est Y ou can use the T est button on the controller either du ring installation to ve rify proper end d evice operation or dur ing troubleshootin g. When you pr ess the T e st button, the controller ex ercises all outputs in a predef ined sequence. The first and la st outputs of the sequen ce reset the[...]

BCXC-SVX0 1B-EN 77 Diagnostics T a ble 41 . T racer ZN0 1 0 and ZN51 0 contr oller diagnostic s Diagnostic Latching Fan Valves Electric heat Damper Auxiliary temper ature failure No Enabled No action No action No action Condensate ov erflow detection Y es Off Closed Off Closed Entering water temper ature No Enabled Enabled Enable d Enabled F an mod[...]

78 BCXC-SVX0 1B-EN Diagnostics Common Diagnostics T able 43. Fa n outputs do not ener giz e Probably cause Explanation Random start observed After power-up , th e contr oller alw ays o bserv e s a r a ndom start that v arie s between 0 and 30 sec onds. The co ntroller remains off until the random start time expires. Power-u p control wait When powe[...]

BCXC-SVX0 1B-EN 79 Diagnostics T able 45. V alves sta y open Probable cause Explanati on Normal operation The controller open s and closes the valves to meet the un i t ca p acity requirements. V alve overr ide The contro ller can communicate a v alve ove rride request to affect th e valve ope ration. Manual output test The controller includes a ma[...]

80 BCXC-SVX0 1B-EN Diagnostics T able 48. Fr esh air damper sta ys open Probable cause Explanati on Normal o peration The co ntroller o pens and closes th e fresh air da mper based on the controller’ s occupancy mode and fan status. N or mally , the fresh air damp er is open during oc cu pied mode when the fan is running and closed during u noccu[...]

BCXC-SVX0 1B-EN 81 Wir ing Diagr ams T w o-Pipe BCX C with T r acer ZN51 0 • 208 vo lt/3 phase • 2-position damper • single stage electric heat • 2-position valve • condensate overflow • wall-mounted zone sensor  W ARNIN G Hazardous V oltage! Disconnect all electric pow er , including remote disconnects before servicing. Follow prope[...]

82 BCXC-SVX0 1B-EN Wir ing Diagra ms F our -Pipe BCX C with T racer ZN51 0 • 208 vo lt/3 phase • 2-position valves • 2-position damper • condensate overflow • low limit protecti on • wall-mounted zone sensor  W ARNIN G Hazardous V oltage! Disconnect all electr ic pow er , including remot e disconn ects befor e servic ing. Follow prop[...]

BCXC-SVX0 1B-EN 83 Wir ing Diagrams F our -Pipe BCX C with T racer ZN51 0 • 1 15 vo lt /1 ph as e • 2-position valves • 2-position damper • 2-speed motor • condensate overflow  W ARNIN G Hazardous V oltage! Disconnect all electr ic pow er , including remot e disconn ects befor e servic ing. Follow proper lock out/tagout procedur es to [...]

84 BCXC-SVX0 1B-EN Wir ing Diagra ms T w o-Pipe BCX C with T r acer ZN520 • 460 vo lt/3 phase • 2-position valve • economizer damper • 2-stage electric heat • fan st atus swi tc h • condensate overflow • wall-mounted zone sensor  W ARNIN G Hazardous V oltage! Disconnect all electr ic pow er , including remot e disconn ects befor e [...]

BCXC-SVX0 1B-EN 85 Wir ing Diagrams F our -Pipe BCX C with T racer ZN520 • 460 vo lt/3 phase • 2-position valves • condensate overflow • fan st atus swi tc h  W ARNIN G Hazardous V oltage! Disconnect all electr ic pow er , including remot e disconn ects befor e servic ing. Follow proper lock out/tagout procedur es to ensure the power can[...]

86 BCXC-SVX0 1B-EN Wir ing Diagra ms F our -Pipe BCX C with T racer ZN520 • 460 vo lt/3 phase • economizer damper • condensate overflow • fan st atus swi tc h • wall-mounted zone sensor  W ARNIN G Hazardous V oltage! Disconnect all electr ic pow er , including remot e disconn ects befor e servic ing. Follow proper lock out/tagout proce[...]

BCXC-SVX0 1B-EN 87 Wir ing Diagrams F our -Pipe BCX C with T racer ZN520 • 460 vo lt/3 phase • 3-wire floating point valves • economizer damper • condensate overflow • fan st atus swi tc h • wall-mounted zone sensor  W ARNIN G Hazardous V oltage! Disconnect all electr ic pow er , including remot e disconn ects befor e servic ing. Fol[...]

88 BCXC-SVX0 1B-EN Wir ing Diagra ms F our -Pipe BCX C with Contr ol Interf ace • • 208 volt/3 phase • • 3-wire floating point valves • • 2-position damper • • low limit protection • • condensate overflow  W ARNIN G Hazardous V oltage! Disconnect all electr ic pow er , including remot e disconn ects befor e servic ing. Follow[...]

BCXC-SVX0 1B-EN 89 Wir ing Diagrams F our -Pipe BCX C with Contr ol Interf ace • 1 15 vo lt /1 ph as e • 2-position damper • 2-speed motor • condensate overflow • low limit protecti on  W ARNIN G Hazardous V oltage! Disconnect all electr ic pow er , including remot e disconn ects befor e servic ing. Follow proper lock out/tagout proced[...]

90 BCXC-SVX0 1B-EN Wir ing Diagra ms BCX C with DX Coil and T racer ZN520 • 277 vo lt/1 phase • economizer damper • condensate overflow • wall-mounted zone sensor 5 ON/OFF 5 ON/OFF CLG CLG DX COOLING DX COOLING C C 38A 38A G G ,K ,K K K G,J G,J DX RELA Y DX RELA Y 1K3 1K3 2S8 2S8 EVAP DEFROST FROS TA T EVAP DEFROST FROS TA T 24 24 24 24 1K3[...]

BCXC-SVX0 1B-EN 91 Wir ing Diagrams BCX C with DX Coil, Hydr oni c Heating, and T r acer ZN520 • 460 vo lt/3 phase • economizer damper • condensate overflow • wall-mounted zone sensor 5 ON/OFF 5 ON/OFF CLG CLG DX COOLING DX COOLING C C 38A 38A G G ,K ,K K K G,J G,J DX RELAY DX RELAY 1K3 1K3 2S8 2S8 EVAP DEFROST FROSTAT EVAP DEFROST FROSTAT [...]

www .trane.com For more information, contact your local T rane office or e-mail us at comfort@trane.com Literature Orde r Number BCXC-SVX0 1B-EN Date April 2008 Supersedes BCXC-SVX0 1A-EN Se ptember 20 02 T rane has a policy of continuous product and pro duct data imp rovement and reserves the right to c hange design and s pecifications without not[...]