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BCVC
User Manual
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Trane BCVC, BCXC-SVX01B-EN, BCHC User Manual

Installation, Operation, and Maintenance
Blower Coil Air Handler
Air Terminal Devices - 400 to 3000 cfm
Models BCHC and BCVC “AO” and later design sequence
April 2008
BCXC-SVX01B-EN
Warnings, Cautions and Notices
Warnings, Cautions and Notices. Note that warnings, cautions and notices appear at
appropriate intervals throughout this manual. Warnings are provide to alert installing contractors to potential hazards that could result in personal injury or death. Cautions are designed to alert personnel to hazardous situations that could result in personal injury, while notices indicate a situation that may result in equipment or property-damage-only accidents.
Your personal safety and the proper operation of this machine depend upon the strict observance of these precautions.
ATTENTION: Warnings, Cautions and Notices appear at appropriate sections throughout this
literature. Read these carefully.
 WARN ING – Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTION – Indicates a potentially hazardous situation which, if not avoided, could result in
minor or moderate injury. It could also be used to alert against unsafe practices.
NOTICE – Indicates a situation that could result in equipment or property-damage only accidents.
Important Environmental Concerns!
Scientific research has shown that certain man-made chemicals can affect the earth's naturally occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment. Trane advocates the responsible handling of all refrigerants-including industry replacements for CFCs such as HCFCs and HFCs.
Responsible Refrigerant Practices!
Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified. The Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment that is used in these service procedures. In addition, some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants. Know the applicable laws and follow them.
WARNING
Refrigerant warning information!
System contains oil and refrigerant under high pressure. Recover refrigerant to relieve pressure before opening the system. See unit nameplate for refrigerant type. Do not use non-approved refrigerants, refrigerant substitutes, or refrigerant additives.
Failure to follow proper procedures or the use of non-approved refrigerants, refrigerant substitutes, or refrigerant additives could result in death or serious injury or equipment damage.
Warnings, Cautions and Notices
WARNING
Hazard of Explosion and Deadly Gases!
Never solder, braze or weld on refrigerant lines or any unit components that are above atmospheric pressure or where refrigerant may be present. Always remove refrigerant by following the guidelines established by the EPA Federal Clean Air Act or other state or local codes as appropriate. After refrigerant removal, use dry nitrogen to bring system back to atmospheric pressure before opening system for repairs. Mixtures of refrigerants and air under pressure may become combustible in the presence of an ignition source leading to an explosion. Excessive heat from soldering, brazing or welding with refrigerant vapors present can form highly toxic gases and extremely corrosive acids. Failure to follow all proper safe refrigerant handling practices could result in death or serious injury.
BCXC-SVX01B-EN 3
Introduction
About This Manual
Use this manual for commercial blower coil models BCHC and BCVC. This is the second version of this manual; this manual supercedes BCXB-SVX01A-EN. It provides specific installation, operation, and maintenance instructions for “AO” and later design sequences.
For previous design sequence information, contact your local Trane representative.
Trademarks
Trane, the Trane logo, Frostat, Integrated Comfort, Rover, Tracer, and Tracer Summit are trademarks of Trane in the United States and other countries. All trademarks referenced in this document are the trademarks of their respective owners.
Table of Contents
Model Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Receiving and Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Pre-Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Dimensions and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Jobsite Storage Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Installation Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Rigging and Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Unit Location Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Skid Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Horizontal Blower Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Vertical Blower Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Angle Filter and Mixing Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Bottom or Top Access Filter Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Steam Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Coil Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Piping Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Installation Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Installing Wall Mounted Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Zone Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Communication Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Tracer Summit Communication Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Installation Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Unit Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Supply Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Electrical Grounding Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Installation Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Installing the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Heating Coil Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Mixing Box Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Condensate Drain Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Duct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Installation Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Water Coil Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Piping Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Refrigerant Coil Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Field-Installing Evaporator Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
BCXC-SVX01B-EN 5
Steam Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Controls Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Tracer Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Rover Service Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Pre-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Tracer ZN Controller Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . 48
Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Fan Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Two- and Four-Pipe Changeover Operation . . . . . . . . . . . . . . . . . . . . . . . 55
Electric Heat Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Economizer Damper (Tracer ZN520 Only) . . . . . . . . . . . . . . . . . . . . . . . . . 56
Tracer Dehumidification (Tracer ZN520 Only) . . . . . . . . . . . . . . . . . . . . . 57
Data Sharing (Tracer ZN510 or ZN520 Only) . . . . . . . . . . . . . . . . . . . . . . 57
Binary Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Binary Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Zone Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Coil Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Periodic Maintenance Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
LED Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Manual Output Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Translating Multiple Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Resetting Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Common Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6 BCXC-SVX01B-EN

Model Number Description

Following is a complete description of the blower coil model number. Each digit in the model number has a corresponding code that identifies specific unit options.
Digits 1, 2, 3, 4 — Unit Model
BCHC= horizontal blower coil BCVC= vertical blower coil
Digits 5, 6, 7 — Unit Size
012 024 054 018 036 072 090
Digit 8 — Unit Voltage
A = 115/60/1 H = 575/60/3 B = 208/60/1 J = 220/50/1 C = 230/60/1 K = 240/50/1 D = 277/60/1 L = 380/50/3 E = 208/60/3 M = 415/50/3 F = 230/60/3 N = 190/50/3 G = 460/60/3 P = two-speed,
115/60/1
0 = no motor, ctrls, elec ht.
Digit 9 —Insulation Type
1 = 1” matte-faced 2 = 1” foil-faced
Digits 10, 11 — Design Sequence
A0
Digit 12 — Motor, Drive, and Control Box Location
A = same side as coil connections,
horizontal or counterswirl only
B = opposite side from coil
connections, horizontal or counterswirl only
C = same side as coil connections,
pre-swirl only
D = opposite side from coil
connections, pre-swirl only R = right-hand access L = left-hand access
Digit 13 — Drain Pan Type, Coil & Drain Connection Side
0 = none 1 = polymer drain pan & right-hand
connections 2 = polymer drain pan & left-hand
connections 3 = stainless steel drain pan & right-
hand connections 4 = stainless steel drain pan & left-
hand connections
Digit 14 — Unit Coil #1*
Note: All coils are hydronic unless stated
otherwise.
0 = none A = 1-row preheat L = 2-row hydronic high-capacity
preheat F = 4-row hydronic G = 6-row hydronic J = 4-row hydronic, autochangeover K = 6-row hydronic, autochangeover M = 4-row hydronic high-capacity N = 6-row hydronic high-capacity R = 4-row hydronic high-capacity,
autochangeover T = 6-row hydronic high-capacity,
autochangeover 1 = 3-row DX, 3/16” distributor
(0.032) 2 = 4-row DX, 3/16” distributor
(0.032) 3 = 6-row DX, 3/16” distributor
(0.032) 4 = 3-row DX, 3/16” distributor
(0.049) 5 = 4-row DX, 3/16” distributor
(0.049) 6 = 6-row DX, 3/16” distributor
(0.049)
Digit 15 — Unit Coil #2*
Note: All coils are hydronic unless stated
otherwise.
0 = none A = 1-row reheat L = 2-row hydronic high-capacity
reheat F = 4-row hydronic G = 6-row hydronic H = 2-row hydronic, autochangeover J = 4-row hydronic, autochangeover K = 6-row hydronic, autochangeover M = 4-row hydronic high-capacity N = 6-row hydronic high-capacity P = 2-row hydronic high-capacity,
autochangeover R = 4-row hydronic high-capacity,
autochangeover T = 6-row hydronic high-capacity,
autochangeover 1 = 3-row DX, 3/16” distributor
(0.032) 2 = 4-row DX, 3/16” distributor
(0.032) 3 = 6-row DX, 3/16” distributor
(0.032) 4 = 3-row DX, 3/16” distributor
(0.049) 5 = 4-row DX, 3/16” distributor
(0.049) 6 = 6-row DX, 3/16” distributor
(0.049)
Digit 16 — Motor Horsepower
0 = none 4 = 1 hp 1 = 1/3 hp 5 = 1-1/2 hp 2 = 1/2 hp 6 = 2 hp 3 = 3/4 hp 7 = 3 hp
Digit 17 — Motor Drives
0 = none A = 390–552 rpm / 60 Hz B = 478–678 rpm / 60 Hz C = 540–765 rpm / 60 Hz D = 619–878 rpm / 60 Hz E = 727–1029 rpm / 60 Hz F = 879–1245 rpm / 60 Hz G = 1000–1417 rpm / 60 Hz H = 1200–1700 rpm / 60 Hz J = 1313–1859 rpm / 60 Hz K = 1615–2288 rpm / 60 Hz L = 678–877 rpm / 60 Hz M = 765–990 rpm / 60 Hz N = 878–1136 rpm / 60 Hz P = 1029–1332 rpm / 60 Hz R = 1245–1611 rpm / 60 Hz T = 1174–1519 rpm / 50 Hz
Digit 18 — Electric Heat Stages
0 = none 1=1-stage 2 = 2-stage
Digits 19, 20, 21 — Electric Heat
000 = none 100 = 10.0 kW 010 = 1.0 kW 110 015 = 1.5 kW 120 020 = 2.0 kW 130 = 13.0 kW 025 = 2.5 kW 140 = 14.0 kW 030 = 3.0 kW 150 = 15.0 kW 035 = 3.5 kW 160 = 16.0 kW 040 = 4.0 kW 170 = 17.0 kW 045 = 4.5 kW 180 = 18.0 kW 050 = 5.0 kW 190 = 19.0 kW 055 = 5.5 kW 200 = 20.0 kW 060 = 6.0 kW 210 = 21.0 kW 065 = 6.5 kW 220 = 22.0 kW 070 = 7.0 kW 240 = 24.0 kW 075 = 7.5 kW 260 = 26.0 kW 080 = 8.0 kW 280 = 28.0 kW 090 = 9.0 kW 300 = 30.0 kW
= =
11.0 kW
12.0 kW
Digit 22 — Electric Heat Controls
0 = none A = 24 volt magnetic contactors B = 24 volt mercury contactors
Digit 23 — Electric Heat Options
0 = none A = electric heat with heater fuse B = electric heat interlocking non-
C=A & B
fused disconnect
BCXC-SVX01B-EN 7
Model Number Description
Digit 24 — Filters
0 = none A = 1” throwaway B = 2” pleated throwaway
Digit 25 — Accessory Section
0 = none A = mixing box only B = angle filter box C = angle filter/mixing box D = top access filter box E = bottom access filter F = A & D L = C & H G = A & E M = D & H H = steam coil N = E & H J = A & H P = A, D, & H K = B & H R = A, E, & H
Digit 26 — Control Type
0 = no controls (4 x 4 junction box) 1 = control interface 2 = Tracer™ ZN010 3 = Tracer ZN510 4 = Tracer ZN520
Digit 27 — Unit Coil #1 Control Valve
0 = none A = 2-way, 2-position, n.c. B = 2-way, 2-position, n.o. C = 3-way, 2-position, n.c. D = 3-way, 2-position, n.o. E = 2-way modulating F = 3-way modulating G = field-supplied valve, 2-pos., n.c. H = field-supplied valve, 2-pos., n.o. J = field-supplied modulating valve
Digit 28 — Unit Coil #1 Control Valve Cv
0 = none A = 3.3 Cv, 1/2” valve & pipe B = 3.3 Cv, 1/2” valve & 3/4” pipe C = 3.8 Cv, 1/2” valve & 3/4” pipe D = 6.6 Cv, 1” valve & pipe E = 7.4 Cv, 1” modulating valve &
pipe
F = 8.3 Cv, 1-1/4” modulating valve &
pipe G = 3.5 Cv, 1/2” valve & pipe H = 4.4 Cv, 1/2” valve & pipe J = 7.0 Cv, 3-way valve
OR 6.0 Cv, 2-way valve, 1” valve
& pipe K = 8.0 Cv, 1” valve & pipe L = 7.4 Cv, 1” 2-position valve & pipe M = 8.3 Cv, 1-1/4” 2-position valve &
pipe Q = 1.3 Cv, 1/2” valve, 3/4” pipe R = 1.8 Cv, 1/2” valve, 3/4” pipe T = 2.3 Cv, 1/2” valve, 3/4” pipe U = 2.7 Cv, 1/2” valve, 3/4” pipe
Digit 29 — Unit Coil #1 Piping Package
0 = none 1 = basic piping package 2 = deluxe piping package
Digit 30 — Unit Coil #2 Control Val ve
0 = none A = 2-way, 2-position, n.c. B = 2-way, 2-position, n.o. C = 3-way, 2-position, n.c. D = 3-way, 2-position, n.o. E = 2-way modulating F = 3-way modulating G = field-supplied valve, 2-pos., n.c. H = field-supplied valve, 2-pos., n.o. J = field-supplied modulating valve
Digit 31 — Unit Coil #2 Control Val ve C v
0 = none A = 3.3 Cv, 1/2” valve & pipe B = 3.3 Cv, 1/2” valve & 3/4” pipe C = 3.8 Cv, 1/2” valve & 3/4” pipe D = 6.6 Cv, 1” valve & pipe E = 7.4 Cv, 1” modulating valve &
pipe
F = 8.3 Cv, 1-1/4” modulating valve &
pipe G = 3.5 Cv, 1/2” valve & pipe H = 4.4 Cv, 1/2” valve & pipe J = 7.0 Cv, 3-way valve
OR 6.0 Cv, 2-way valve, 1” valve
& pipe K = 8.0 Cv, 1” valve & pipe L = 7.4 Cv, 1” 2-position valve & pipe M = 8.3 Cv, 1-1/4” 2-position valve &
pipe Q = 1.3 Cv, 1/2” valve, 3/4” pipe R = 1.8 Cv, 1/2” valve, 3/4” pipe T = 2.3 Cv, 1/2” valve, 3/4” pipe U = 2.7 Cv, 1/2” valve, 3/4” pipe
Digit 32 — Unit Coil #2 Piping Package
0 = none 1 = basic piping package 2 = deluxe piping package
Digit 33 — Remote Heat Options
0 = none 1 = staged electric heat 2 = 2-position hot water, n.c.
Digit 34 — Mixing Box Damper Actuator
Note: The back damper is the control
damper when actuators are ordered. The back damper is n.c. (normally closed) or n.o. (normally open) as selected.
0 = none 1 = 2-position, n.o., ship loose 2 = modulating, n.c. 3 = modulating, n.o. 4 = modulating, ship loose 5 = field-supplied 2-position, n.o. 6 = field-supplied 2-position, n.c. 7 = field-supplied modulating
Digit 35 — Factory Mounted Control Options
0 = none A = fan status C = condensate overflow D = low limit F = A & C K = C & D G = A & D N = A, C, & D
Digit 36 — Control Options 2
0 = none A = outside air sensor, field-mounted B = discharge air sensor C=A & B
Digit 37 — Control Options 3
0 = none A = dehumidification with
communicated value
B = dehumidification with local
humidity sensor
Digit 38 — Zone Sensors
0 = none 1 = off/auto, setpoint knob, on/cancel,
COMM
2 = off/auto/high/low, setpoint knob,
on/cancel, COMM
3 = wall mtd. zone sensor (set point,
occ, COMM)
4 = wall mtd. zone sensor (occ,
COMM) 5 = wall mtd. zone temp sensor A = digital zone sensor (O, A, H, L; SP;
OCC; COMM) B = digital zone sensor (CPS; OCC;
COMM) C = wireless zone sensor (setpoint
only)
Digit 39 — Extra Belt
0 = none 1 = ship loose extra belt
Digit 40 — Extra Filter
0 = none 1 = ship loose extra 1” throwaway
filter 2 = ship loose extra 2” pleated
throwaway
8 BCXC-SVX01B-EN

General Information

Blower Coil General Information
Blower coil units are draw-thru air handlers for cooling load conditions of 400–3000 cfm. Units are available in either horizontal (model BCHC) or vertical (model BCVC) configurations. Horizontal units are typically ceiling suspended via threaded rods. Knockouts are provided in all four corners to pass the rods through the unit. Horizontal units can also be floor mounted. Vertical units are typically floor mounted. They have a side inlet for easy duct connection, and do not require a field fabricated inlet plenum. Vertical units ship in two pieces and can be set up in either a pre-swirl or counter-swirl configuration.
Basic unit components consist of a water coil, condensate drain pan, filter, duct collars, one fan wheel, and motor with drive. See Figure 1. Drive components consist of sheaves, belt, and motor. The coil, drain pan, and motor/drive assembly can easily be field-converted from right hand to left hand configurations or vice versa.
Figure 1. Blower coil air handler unit components (model BCHC, horizontal unit)
Main coil with copper tubes and enhanced
aluminum fins in 2-, 4-, Unit sizes 12, 18, 24, 36, 54, 72, and 90 MBh
Knockouts in all four corners for hanger rods
Galvanized steel cabinet in 14-, 18-, 22-, and 28-inch heights
or 6-row hydronic or 3-,
4-, or 6-row DX
Internal filter frame accommodates 1- or 2-inch filters
Angle filter option and/or
Forward curved fan
Control options include control interface, Tracer™ ZN010, ZN510, or ZN520
1/3 to 3 hp motor with drive selections from 390 to 1611 rpm
Internal 1- or 2-row auxiliary coil in preheat or reheat position
mixing box accommodates 2-inch filters
Main and auxiliary drain connections on same side of unit
Two, four, or six-row main coils are available for either hydronic cooling or heating. Three, four, or six-row direct expansion (DX) coils are also available for cooling. An optional one, two, four, or six­row heating coil is available factory-installed in either the preheat or reheat position. Also, a one­row preheat steam is available.
All units have an internal flat filter frame for one or two-inch filters. An optional angle filter box (two inch only), mixing box, bottom/top filter access box, or combination angle filter mixing box is available.
In addition, all units are available with either a basic or deluxe piping package option that includes a variety of control valve sizes in two or three-way configurations. The basic package consists of
BCXC-SVX01B-EN 9
General Information
a control valve and stop (ball) valves. The deluxe package consists of a control valve, a stop (ball) valve, a circuit setter, and strainer.
Belt-drive motors range from 1/3 to 3 horsepower in a wide range of voltages. All motors have internal thermal and current overloads, permanently sealed ball bearings, and a resilient cradle mount to reduce noise and vibration transmission.
Variable pitch sheave drive kit options help make it possible to more accurately select design static pressure. For additional flexibility, 115 volt single phase, two speed motors are optional.
Note: Sheaves are factory set in the middle of the range. Field adjustment of sheaves, motor, and
Units may have no controls (4 x 4 junction box) or any of four different control types:
1. control interface
2. Tracer™ ZN010
3. Tracer ZN510
4. Tracer ZN520
All control options are factory-installed and tested.
belt are required to arrive at desired rpm. Refer to the original sales order and Table 35, p. 68 for drive information.
10 BCXC-SVX01B-EN

Pre-Installation

Receiving and Handling

Blower coil units are packaged for easy handling and storage on the job site. Upon delivery, inspect all components for possible shipping damage. See the “Receiving Checklist” section (below) for detailed instructions. Trane recommends leaving units and accessories in their shipping packages/ skids for protection and handling ease until installation.
Shipping Package
Blower coil air handlers ship assembled on skids with protective coverings over the coil and discharge openings.
Ship-Separate Accessories
Field-installed sensors ship separately inside the unit’s main control panel. Piping packages, mixing boxes, ship separately packaged on the same skid as the unit.
Receiving Checklist
Complete the following checklist immediately after receiving unit shipment to detect possible shipping damage.
Inspect individual cartons before accepting. Check for rattles, bent carton corners, or other visible indications of shipping damage.
If a unit appears damaged, inspect it immediately before accepting the shipment. Manually rotate the fan wheel to ensure it turns freely. Make specific notations concerning the damage on the freight bill. Do not refuse delivery.
Inspect the unit for concealed damage before it is stored and as soon as possible after delivery. Report concealed damage to the freight line within the allotted time after delivery. Check with the carrier for their allotted time to submit a claim.
Do not move damaged material from the receiving location. It is the receiver’s responsibility to provide reasonable evidence that concealed damage did not occur after delivery.
Do not continue unpacking the shipment if it appears damaged. Retain all internal packing, cartons, and crate. Take photos of damaged material if possible.
Notify the carrier’s terminal of the damage immediately by phone and mail. Request an immediate joint inspection of the damage by the carrier and consignee.
Notify your Trane representative of the damage and arrange for repair. Have the carrier inspect the damage before making any repairs to the unit.
Compare the electrical data on the unit nameplate with the ordering and shipping information to verify the correct unit is received.

Jobsite Storage Recommendations

This unit is intended for indoor use only. To protect the unit from damage due to the elements and prevent it from possibly becoming a contaminant source for IAQ problems, store the unit indoors. If indoor storage is not possible, the Trane Company makes the following provisions for outdoor storage:
1. Place the unit(s) on a dry surface or raised off the ground to assure adequate air circulation beneath unit and to assure that no portion of the unit contacts standing water at any time.
2. Cover the entire unit with a canvas tarp only. Do not use clear, black, or plastic tarps as they may cause excessive moisture condensation and equipment damage.
Note: Wet interior unit insulation can become an amplification site for microbial growth (mold),
which may cause odors and health-related indoor air quality problems. If there is visible evidence of microbial growth (mold) on the interior insulation, remove and replace the insulation prior to operating the system.
BCXC-SVX01B-EN 11
Pre-Installation

Installation Preparation

Before installing the unit, perform the following procedures to ensure proper unit operation.
1. Verify the floor or foundation is level. Shim or repair as necessary. To ensure proper unit
operation, install the unit level (zero tolerance) in both horizontal axes. Failure to level the unit properly can result in condensate management problems, such as standing water inside the unit. Standing water and wet surfaces inside units can result in microbial growth (mold) in the drain pan that may cause unpleasant odors and serious health-related indoor air quality problem.
2. Allow adequate service and code clearances as recommended in the “Service Access” section
(below). Position the unit and skid assembly in its final location. Test lift the unit to determine exact unit balance and stability before hoisting it to the installation location.

Service Access

See Ta b le 1 , below, and Figure 2, p. 13 for recommended service and code clearances.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.
Table 1. Service requirements, in. (cm)
Unit size Dimension A
12 20 (50.8) 18 25 (63.5) 24 25 (63.5) 36 37 (94.0) 54 37 (94.0) 72 45 (114.3) 90 45 (114.3)
12 BCXC-SVX01B-EN
Pre-Installation
Figure 2. Top view of blower coil unit showing recommended service and code clearances
3
3

Rigging and Handling

Before preparing the unit for lifting, estimate the approximate center of gravity for lifting safety. Because of placement of internal components, the unit weight may be unevenly distributed, with more weight in the coil area. Approximate unit weights are given in “Dimensions and Weights,”
p. 15. Also, you may reference the unit weight on the unit nameplate.
Before hoisting the unit into position, use a proper rigging method such as straps, slings, or spreader bars for protection and safety. Always test-lift the unit to determine the exact unit balance and stability before hoisting it to the installation location.
WARNING
Improper Unit Lift!
Test lift unit approximately 24 inches to verify proper center of gravity lift point. To avoid dropping of unit, reposition lifting point if unit is not level. Failure to properly lift unit could result in death or serious injury or possible equipment or property-only damage.
Unit Handling Procedure
1. Position rigging sling under wood skid using spreader bars to avoid unit damage.
2. Use a forklift with caution to prevent unit damage. The fork length must be at least 68 inches
long to safely fork the unit from front or back.
3. The unit center of gravity will fall within the center of gravity block at various locations
depending on unit options.
4. See unit nameplate for unit weight.

Unit Location Recommendations

When selecting and preparing the unit installation location, consider the following recommendations.
BCXC-SVX01B-EN 13
Pre-Installation
1. Consider the unit weight. Reference the unit weight on the unit nameplate or in “Dimensions
and Weights,” p. 15.
2. Allow sufficient space for the recommended clearances, access panel removal, and
maintenance access. Refer to Figure 2, p. 13.
3. The installer must provide threaded suspension rods for ceiling mounted units. All units must
be installed level.
4. Coil piping and condensate drain requirements must be considered.
Allow room for proper ductwork and electrical connections. Support all piping and ductwork independently of unit to prevent excess noise and vibration.

Skid Removal

The unit ships on skids that 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 of the unit off of the skids. Vibration isolators for external isolation are field supplied.

Pre-Installation Checklist

Complete the following checklist before beginning unit installation.
Verify the unit size and tagging with the unit nameplate.
Make certain the floor or foundation is level, solid, and sufficient to support the unit and
accessory weights. Refer to “Dimensions and Weights,” p. 15. Level or repair the floor before positioning the unit if necessary.
Allow minimum recommended clearances for routine maintenance and service. Refer to unit submittals for dimensions.
Allow one and one half fan diameters above the unit for the discharge ductwork.
14 BCXC-SVX01B-EN

Dimensions and Weights

Horizontal Blower Coil

top view
M
M
M
*NOTE: ON UNITS WITHOUT A BOTTOM FILTER ACCESS SECTION
P
P
Q
Q
1.5
front view
J
J
Table 2. Horizontal blower coil dimensions (in.) and weights (lb)
Unit size H W L A B C D E FG (RH)G (LH)J (RH)J (LH) K M P Q
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 22.00 10.56 7.09 0.55 3.00 11.42 13.42 9.42 11.42 4.20 10.46 9.00 5.75 76.10 24 18.00 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 7.72 9.00 5.75 98.90 36 18.00 40.00 44.00 16.09 34.00 13.56 12.56 1.30 3.00 11.42 13.42 9.42 11.42 6.20 13.72 9.00 5.75 116.10 54 22.00 40.00 49.00 20.09 34.00 13.56 12.56 0.72 3.00 11.42 13.42 9.42 11.42 7.43 13.72 11.00 7.27 138.90 72 22.00 48.00 49.00 20.09 40.00 13.56 12.56 0.72 4.00 11.42 13.42 9.42 11.42 7.43 17.72 11.00 7.27 152.20 90 28.00 48.00 52.00 26.09 40.00 13.56 12.56 1.66 4.00 12.79 14.79 10.79 12.79 8.24 17.72 11.25 11.64 174.80
Basic
weight
unit
BCXC-SVX01B-EN 15
Dimensions and Weights

Vertical Blower Coil

M
M
top view
front view
vertical counter swirl
configuration
*NOTE; ON UNITS WITHOUT A TOP FILTER ACCESS SECTION
vertical preswirl
M
6.00
6.00
P
Q
J
configuration
Table 3. Vertical blower coil dimensions (in.) and weights (lb)
Unit size H W L A B C D E FG (RH)G (LH)J (RH)J (LH) K M N P Q R
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 40.00 44.00 16.09 34.00 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 28.00 180.40 54 72.50 40.00 47.00 20.09 34.00 13.56 12.56 0.72 3.00 11.42 13.42 9.42 11.42 4.21 10.43 22.00 11.00 7.27 30.00 206.40 72 72.50 48.00 47.00 20.09 40.00 13.56 12.56 0.72 4.00 11.42 13.42 9.42 11.42 4.18 10.43 22.00 11.00 7.27 30.00 228.20 90 81.50 48.00 50.00 26.09 40.00 13.56 12.56 1.66 4.00 12.79 14.79 10.79 12.79 4.81 15.61 28.00 11.25 11.64 30.00 258.40
16 BCXC-SVX01B-EN
Basic
unit
weight

Angle Filter and Mixing Box

combination angle filter
& mixing box
mixing box
Dimensions and Weights
angle filter box
Table 4. Angle filter and mixing box 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 31.56 72.0 72 22.00 23.50 48.00 12.81 32.56 72.5 90 27.90 27.56 48.00 12.85 31.56 84.1
BCXC-SVX01B-EN 17
Dimensions and Weights

Bottom or Top Access Filter Box

7.17
.97
AIR FLOW
FILTER
FILTER
FILTER ACCESS PANEL
right side view
NOTES;
1. DIMENSIONS ARE IN INCHES.
2. ROTATE 180° FOR TOP ACCESS.
3. SECTIONS SHIPS ATTACHED TO THE UNIT.
Table 5. Bottom or top access filter box dimensions (in.) and weights (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 22.00 40.00 18.23 1.89 33.73 3.13 28 72 22.00 48.00 18.23 1.89 42.73 2.63 32 90 28.00 48.00 23.23 1.89 41.23 3.38 37
AIR FLOW
top view
18 BCXC-SVX01B-EN

Electric Heat

Dimensions and Weights
& 90
top view
D
front view
& 90
ELECTRIC HEAT MAY NEED FIELD-SUPPLIED EXTERNALLY-WRAPPED INSULATION IF THE UNIT IS INSTALLED IN AN UNCONDITIONED SPACE OR IF SWEATING IS AN ISSUE.
right side view
& 90 ARE HINGED
Table 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 13.63 11.67 13.50 12.63 0.22 16.0 72 18.06 27.25 13.63 11.67 13.50 12.63 0.22 17.4 90 18.06 27.25 13.63 11.67 13.50 12.63 1.16 19.2
BCXC-SVX01B-EN 19
Dimensions and Weights

Steam Coil

NOTES:
1. FILTER ACCESS & ACCESS PANEL LOCATED ON BOTH SIDES.
2. WEIGHT INCLUDES CABINET WITH AVERAGE FILTER, BUT DOES NOT INCLUDE CIOL WEIGHT. SEE GENERAL DATA SECTION FOR COIL WEIGHTS.
ACCESS PANEL
HEATING COIL
21.00
0.97
AIRFLOW
0.97
FILTER ACCESS
CC
H
A
B
W
Table 7. Steam coil box dimensions (in.) and weights (lb)
Coil Connections, NPT
Unit size
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 22.00 40.00 20.06 34.04 2.98 50 2 1 72 22.00 48.00 20.06 42.04 2.98 56 2 1 90 28.00 48.00 26.06 40.04 3.98 63 2.5 1-1/4
H W A B C Weight Supply Return
20 BCXC-SVX01B-EN

Coil Connections

Dimensions and Weights
Table 8. Hydronic coil connection sizes, OD (in.)
Standard capacity High capacity
Unit size
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 1-1/8 1-1/8 1-1/8 90 1-1/8 1-5/8 1-5/8 1-1/8 1-1/8 1-1/8
Table 9. DX coil connection sizes, OD (in.)
Unit size
12 5/8 5/8 5/8 5/8 18 5/8 5/8 5/8 5/8 24 5/8 5/8 7/8 5/8 36 7/8 5/8 7/8 5/8 54 1-1/8 7/8 1-1/8 7/8 72 1-1/8 7/8 1-1/8 7/8 90 1-3/8 7/8 1-1/8 7/8
1-row 4-row 6-row 2-row 4-row 6-row
3- & 4-row 6-row
Suction Liquid Suction Liquid
Table 10. Steam coil connection sizes, female connection, NPT (in.)
Unit size Supply Return
12 1 3/4 18 1 3/4 24 1-1/2 1 36 1-1/2 1 54 2 1 72 2 1 90 2-1/2 1-1/4
BCXC-SVX01B-EN 21
Dimensions and Weights

Piping Packages

Basic Piping
Two-way, 1/2” and 1” valve basic piping package
Two-way, 1-1/4” valve basic piping package
AB
B
A
A
B
AB
A
Three-way, 1/2” and 1” valve basic piping package
A
B
AB
E
B
F
E
A
22 BCXC-SVX01B-EN
B
Deluxe Piping
Two-way, 1/2” and 1” valve deluxe piping package
D
AB
C
Dimensions and Weights
Two-way 1-1/4” valve deluxe piping package
D
BA
AB
C
E
BCXC-SVX01B-EN 23
Dimensions and Weights
Three-way, 1/2” and 1” valve deluxe piping package
F
A
B
AB
E
C
D
Table 11. Piping package dimensions (in.)
Piping
package
2-way 1/2 5/8 12.025 2.650 12.625 5.650 N/A N/A
3-way 1/2 5/8 12.088 2.097 12.688 4.497 6.351 6.351
Nominal
tube size Actual size A B C D E F
1 1-1/8 13.295 4.260 13.220 9.288 3.020 N/A
3/4 7/8 15.623 1.750 15.313 6.290 6.701 6.701
1 1-1/8 13.370 3.690 13.210 9.060 9.813 9.813
1-1/4 1-3/8 16.885 3.738 16.410 10.023 3.052 10.520
24 BCXC-SVX01B-EN

Installation Controls

Installing Wall Mounted Controls

Wall mounted zone sensors ship taped to the control box. Refer to Figure 3 for zone sensor dimensions.
Position the controller on an inside wall three to five feet above the floor and at least 18 inches from the nearest outside wall. Installing the controller at a lower height may give the advantage of monitoring the temperature closer to the zone, but it also exposes the controller to airflow obstructions. Ensure that air flows freely over the controller.
Before beginning installation, follow the wiring instructions below. Also, refer to the unit wiring schematic for specific wiring details and point connections.
Wiring Instructions
Avoid mounting the controller in an area subject to the following conditions:
• Dead spots, such as behind doors or in corners that do not allow free air circulation.
• Air drafts from stairwells, outside doors, or unsectioned hollow walls.
• Radiant heat from the sun, fireplaces, appliances, etc.
• Airflow from adjacent zones or other units.
• Unheated or uncooled spaces behind the controller, such as outside walls or unoccupied spaces.
• Concealed pipes, air ducts, or chimneys in partition spaces behind the controller.

Zone Sensor Installation

Follow the procedure below to install the zone sensor module (see Figure 3).
Figure 3. Wall-mounted zone sensor dimensions
1. Note the position of the setpoint adjustment knob and gently pry the adjustment knob from the
cover using the blade of a small screwdriver.
2. Insert the screwdriver blade behind the cover at the top of the module and carefully pry the
cover away from the base.
3. To install the zone sensor module without a junction box (directly to the wall):
a. Using the module base as a template, mark the rectangular cutout for the control wiring and
module installation holes. Ensure the base is level.
b. Set the base aside and make the cutout. Then, drill two 3/16” diameter holes approximately
one-inch deep. Insert and fully seat the plastic anchors.
c. Pull the control wires through the cutout and attach the module to the wall using the screws
provided.
4. To install the zone sensor module to a standard junction box:
a. Level and install a 2” x 4” junction box (installer supplied) vertically on the wall.
BCXC-SVX01B-EN 25
Installation Controls
b. Pull the control wires through the cutout. Attach the module to the wall using the screws
provided.
5. Strip the insulation on the interconnection wires back 0.25 inch and connect to TB1. Screw down
the terminal blocks.
6. Replace the zone sensor cover and adjustment knob.
If installing a Tracer™ ZN510 or ZN520 zone sensor, see “Tracer Summit Communication Wiring,”
p. 27 for more information.

Communication Wiring

Units with Tracer ZN510 or ZN520 only
Note: Communication link wiring is a shielded, twisted pair of wire and must comply with
Follow these general guidelines when installing communication wiring on units with either a Tracer™ ZN510 or ZN520 controller:
• Maintain a maximum 5000 ft. aggregate run
• Install all communication wiring in accordance with the NEC and all local codes.
• Solder the conductors and insulate (tape) the joint sufficiently when splicing communication
wire. Do not use wire nuts to make the splice.
• Do not pass communication wiring between buildings because the unit will assume different
ground potentials.
• Do not run power in the same conduit or wire bundle with communication link wiring.
applicable electrical codes.
Service Communication Wiring
Establish service communication using Rover™ service software connected to the Tracer™ ZN controller using a twisted wire pair to one of the following connection points:
• Remote zone sensor module
• Connections on the board
This allows the technician to view and edit the Tracer™ controller configuration and troubleshoot the unit.
Note: Unit control options and field wiring practices may limit the controller’s communication
ability.
Route interconnecting wiring from the Tracer™ controller to provide service communication at the wall-mounted zone sensor module. Install wiring by referencing the unit wiring diagram and
Ta b l e 12 , p . 2 9 for appropriate wire sizes. After wiring is complete, connect the communication
cable (provided with the Rover™ service tool) to the telephone style RJ11 connection on the zone sensor module. Attach the other end of the cable to a computer running Trane Rover software to communicate.
Zone Sensors Without Interconnecting Wiring
Establish service communication to the Tracer™ ZN controller by wiring directly to the board inside the control box. Refer to the unit-wiring diagram for appropriate communication terminals on the board.
Once wiring is complete, Use Trane Rover™ software to communicate to the Tracer™ ZN controller.
Tracer Communications
Tracer™ ZN controllers have Comm5 communication ports. Typically, a communication link is applied between unit controllers and a building automation system. Communication also is possible via Rover™, Trane’s service tool.
26 BCXC-SVX01B-EN
Peer-to-peer communication across controllers is possible even when a building automation system is not present.You do not need to observe polarity for Comm5 communication links.
The controller provides six 0.25-inch quick-connect terminals for the Comm5 communication link connections, as follows:
• Two terminals for communication to the board
• Two terminals for communication from the board to the next unit (daisy chain)
• Two terminals for a connection from the zone sensor back to the controller
Each controller has its own unique address or I.D. number on a Neuron chip. Setting dip switches are not required on the Tracer™ controller.

Tracer Summit Communication Wiring

For Tracer™ ZN-controlled units that will interface with the Trane Tracer Summit® building management system, terminate the communication wiring in the control box at the designated terminals on the board. Reference the unit wiring diagram or submittals.
Ground shields at each Tracer™ ZN controller, taping the opposite end of each shield to prevent any connection between the shield and anther ground. Refer to Trane publication CNT-SVX04A-EN, Tracer ZN.520 Unit Controller - Installation, Operation and Programming Guide, for the communication wiring diagram.
Communication wire must conform to the following specification:
• Shielded twisted pair 18 AWG
• Capacitance 23 (21-25) picofarads (pF) per foot
• Listing/Rating – 300V 150C NEC 725-2 (b) Class 2 Type CL2P
• Trane Part No. 400-20-28 or equivalent, available through Trane BAS Buying Group Accessories
catalog.
Installation Controls
BCXC-SVX01B-EN 27

Installation Electrical

Unit Wiring Diagrams

Specific unit wiring diagrams are provided on the inside of the control panel door. Typical unit wiring diagrams are in “Wiring Diagrams,” p. 81. Use these diagrams for connections or trouble analysis.
WARNING
Grounding Required!
Follow proper local and state electrical codes for requirements on grounding. Failure to follow code could result in death or serious injury.

Supply Power Wiring

Wiring must conform to NEC and all applicable code requirements.
It is the installer’s responsibility to provide adequately-sized power wires and proper unit grounding.
Bring supply wiring through provided equipment knockouts located at the power connection point on the unit. Equipment submittals should be referred to for the exact electrical access connection point. Connect the power wires to the power connection point provided.
Connection to the installer-provided ground path must be made to the green wire or green grounding screw provided on each unit.
Locate unit wiring diagrams on the inside of the control box cover. Refer to the unit-specific wiring diagrams for wiring, connection point, and fuse installation information. Refer to the unit nameplate for unit-specific electrical information, such as voltage, minimum circuit ampacity (MCA), and maximum fuse size (MFS).
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.
NOTICE
Use copper conductors only!
Unit terminals are not designed to accept other conductor types. Failure to use copper conductors could cause equipment damage.
NOTICE
Correct phase critical!
Correct phase sequence is critical. If phase sequence of the incoming line voltage is not correct, it could cause motor damage.

Electrical Connections

Units have one of three different connection points, depending on the unit type and options.
1. If the unit has no controls: power and ground are tucked inside of the handy box.
2. If the unit has a control interface or Tracer™ ZN controller: power and ground are inside the
control box. If the unit has a control interface or a Tracer controller, the power wires and ground wire are inside the control box connected to a non fused disconnect switch.
28 BCXC-SVX01B-EN
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