Table of Contents
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BCXB with DX coil & Tracer ZN520
• volt/3 phase
• economizer damper
• wall-mounted zone sensor
• condensate overflow
NOTES:
NOTES:
1
UNLESS OTHERWISE NOTED, ALL SWITCHES ARE SHOWN
UNLESS OTHERWISE NOTED, ALL SWITCHES ARE SHOWN
AT 25
AT 25˚ C (77
C (77˚ F), AT ATMOSPHERIC PRESSURE, AT
F), AT ATMOSPHERIC PRESSURE, AT
50% RELATIVE HUMIDITY, WITH ALL UTILITIES TURNED
50% RELATIVE HUMIDITY, WITH ALL UTILITIES TURNED
1
OFF, AND AFTER A NORMAL SHUTDOWN HAS OCCURED.
OFF, AND AFTER A NORMAL SHUTDOWN HAS OCCURED.
2
DASHED LINES INDICATE RECOMMENDED FIELD WIRING
DASHED LINES INDICATE RECOMMENDED FIELD WIRING
BY OTHERS. DASHED LINE ENCLOSURES AND/OR DASHED
BY OTHERS. DASHED LINE ENCLOSURES AND/OR DASHED
2
DEVICE OUTLINES INDICATE COMPONENTS PROVIDED
DEVICE OUTLINES INDICATE COMPONENTS PROVIDED
BY THE FIELD. SOLID LINES INDICATE WIRING BY
BY THE FIELD. SOLID LINES INDICATE WIRING BY
TRANE CO.
TRANE CO.
3
3
ALL FIELD WIRING MUST BE IN ACCORDANCE WITH THE
ALL FIELD WIRING MUST BE IN ACCORDANCE WITH THE
NATIONAL ELECTRIC CODE (NEC), STATE AND LOCAL
NATIONAL ELECTRIC CODE (NEC), STATE AND LOCAL
4
REQUIREMENTS.
REQUIREMENTS.
4
NUMBERS ALONG THE RIGHT SIDE OF THE SCHEMATIC
NUMBERS ALONG THE RIGHT SIDE OF THE SCHEMATIC
DESIGNATE THE LOCATION OF CONTACTS BY LINE NUMBER.
DESIGNATE THE LOCATION OF CONTACTS BY LINE NUMBER.
5
5
FIELD SUPPLIED CONTROL RELAYS, POWERED BY THIS UNIT,
FIELD SUPPLIED CONTROL RELAYS, POWERED BY THIS UNIT,
MUST BE PILOT DUTY RATED, 24VAC COIL, 6VA MAX.
MUST BE PILOT DUTY RATED, 24VAC COIL, 6VA MAX.
6
6
WIRING TO ZONE SENSOR MUST BE 16-22 AWG, CU TWISTED
WIRING TO ZONE SENSOR MUST BE 16-22 AWG, CU TWISTED
PAIR SHIELDED CABLE AND NO MORE THAN 1000 FT LG.
PAIR SHIELDED CABLE AND NO MORE THAN 1000 FT LG.
7
SHIELD MUST BE GROUNDED AT UCM END(END CHASSIS) AND
SHIELD MUST BE GROUNDED AT UCM END(END CHASSIS) AND
TAPED AT THE OTHER END. IF INSTALLED IN CONDUIT, DO
TAPED AT THE OTHER END. IF INSTALLED IN CONDUIT, DO
NOT INSTALL WIRES IN CONDUIT THAT CONTAINS WIRES 24VAC
NOT INSTALL WIRES IN CONDUIT THAT CONTAINS WIRES 24VAC
8
OR HIGH VOLTAGE POWER WIRES.
OR HIGH VOLTAGE POWER WIRES.
7
COMMUNICATION WIRE MUST BE TRANE PART NO.
COMMUNICATION WIRE MUST BE TRANE PART NO.
9
400-20-28, OR WINDY CITY OR CONNECT AIR
400-20-28, OR WINDY CITY OR CONNECT AIR
"LEVEL 4" CABLE. MAXIMUM OF 4500 FOOT
"LEVEL 4" CABLE. MAXIMUM OF 4500 FOOT
AGGREGATE RUN.
AGGREGATE RUN.
10
10
CAUTION! DO NOT RUN POWER IN THE SAME
CAUTION! DO NOT RUN POWER IN THE SAME
CONDUIT OR WIRE BUNDLE WITH COMMUNICATION LINK.
CONDUIT OR WIRE BUNDLE WITH COMMUNICATION LINK.
FOR ADDITIONAL INFORMATION REFER TO EMTX-EB-68.
FOR ADDITIONAL INFORMATION REFER TO EMTX-EB-68.
11
11
8
8
8
8
8
12
12
9
13
13
14
14
15
15
W(BLK)
W(BLK)
16
16
1TB1-L2
1TB1-L2
E
17
17
11
11
1TB1-L1
1TB1-L1
C
,K ,K
(BLK)
(BLK)
18
18
10
10
19
19
1K1
1K1
W
,X ,X
E
(BLK)
(BLK)
20
20
1TB1-L1
1TB1-L1
10
10
7K5
7K5
1TB1-L1
1TB1-L1
21
21
10
10
1K2
1K2
1K2
1K2
22
22
1P2-1
1P2-1
1P2-1
1P2-1
1P2-1
1P2-1
1P2-1
1P2-1
1P2-1
1P2-1
1TB1-L1
1TB1-L1
K
23
23
1J2-1
1J2-1
1J2-1
1J2-1
1J2-1
1J2-1
1J2-1
1J2-1
1J2-1
1J2-1
2J3-1
2J3-1
2J3-1
2J3-1
2J3-1
2J3-1
2J3-1
2J3-1
2J3-1
2J3-1
10
10
8
8
8
8
1P2-1
1P2-1
J
24
24
1J2-3
1J2-3
1J2-1
1J2-1
2S7
2S7
1P5-1
1P5-1
1P5-1
1P5-1
1P5-1
1P5-1
1P5-1
1P5-1
1P5-1
1P5-1
1TB1-L1
1TB1-L1
X
BRN
BRN
25
25
COMMON
COMMON
1J5-1
1J5-1
1J5-1
1J5-1
1J5-1
1J5-1
1J5-1
1J5-1
1J5-1
1J5-1
2J6-1
2J6-1
2J6-1
2J6-1
2J6-1
2J6-1
2J6-1
2J6-1
2J6-1
2J6-1
10
10
ELECTRIC HEAT
ELECTRIC HEAT
8
8
CONTROL BOX
CONTROL BOX
26
26
1J5-3
1J5-3
1P8-3
1P8-3
1P8-3
1P8-3
1P8-3
1P8-3
E(WHT)
E(WHT)
27
27
V
1J8-3
1J8-3
1J8-3
1J8-3
1J8-3
1J8-3
1P8-4
1P8-4
1P8-4
1P8-4
1P8-4
1P8-4
B(BLK)
B(BLK)
28
28
1J8-4
1J8-4
1J8-4
1J8-4
1J8-4
1J8-4
V
29
29
30
30
31
31
32
32
33
33
34
34
35
35
36
36
37
37
38
38
39
39
40
41
42
68
43
44
Maintenance
277/60/1
277/60/1
N
ELECTRIC HEAT
ELECTRIC HEAT
CONTROL BOX
CONTROL BOX
1S1
1S1
WHT
WHT
BRN
BRN
1CB1
1CB1
BLU
BLU
5
5
1K3
1K3
5P3-1
5P3-1
5P3-1
5P3-1
5P3-1
5P3-1
5P3-1
5P3-1
5P3-1
5P3-1
5P4-1
5P4-1
5P4-1
5P4-1
5P4-1
5P4-1
5P4-1
5P4-1
5P4-1
5P4-1
5P4-2
5P4-2
5P4-2
5P4-2
5P4-2
5P4-2
5P4-2
5P4-2
5P4-2
5P4-2
5P3-2
5P3-2
5P3-2
5P3-2
5P3-2
5P3-2
5P3-2
5P3-2
5P3-2
5P3-2
G
DX COOLING
DX COOLING
5J4-1
5J4-1
5J4-1
5J4-1
5J4-1
5J4-1
5J4-1
5J4-1
5J4-1
5J4-1
5J4-2
5J4-2
5J4-2
5J4-2
5J4-2
5J4-2
5J4-2
5J4-2
5J4-2
5J4-2
2
4
1K3
1K3
5P4-3
5P4-3
5P4-3
5P4-3
5P3-3
5P3-3
5P3-3
5P3-3
1P2-3
1P2-3
5P3-3
5P3-3
5P4-3
5P4-3
2S8
2S8
G,J
G,J
38A
38A
2J3-3
2J3-3
5J4-3
5J4-3
5J4-3
5J4-3
5J4-3
5J4-3
1
3
5P7-2
5P7-2
5P7-2
5P7-2
5P7-2
5P7-2
5P7-2
5P7-2
5P7-2
5P7-2
5P6-2
5P6-2
5P6-2
5P6-2
5P6-2
5P6-2
5P6-2
5P6-2
5P6-2
5P6-2
5P6-1
5P6-1
5P6-1
5P6-1
5P6-1
5P6-1
5P6-1
5P6-1
5P6-1
5P6-1
5P7-1
5P7-1
5P7-1
5P7-1
5P7-1
5P7-1
5P7-1
5P7-1
5P7-1
5P7-1
ORG
ORG
STAGE 1
STAGE 1
5J7-1
5J7-1
5J7-1
5J7-1
5J7-1
5J7-1
5J7-1
5J7-1
5J7-1
5J7-1
5J7-2
5J7-2
5J7-2
5J7-2
5J7-2
5J7-2
5J7-2
5J7-2
5J7-2
5J7-2
1P5-3
1P5-3
5P6-3
5P6-3
5P7-3
5P7-3
5P7-3
5P7-3
5P7-3
5P7-3
5P6-3
5P6-3
5P6-3
5P6-3
PUR
PUR
STAGE 2
STAGE 2
2J6-3
2J6-3
5J7-3
5J7-3
5J7-3
5J7-3
5J7-3
5J7-3
4U4
4U4
2J9-1
2J9-1
4P9-3
4P9-3
C
TR1
TR1
CCW
CCW
TR1
TR1
CCW
CCW
X
4P9-1
4P9-1
2J9-3
2J9-3
4P9-4
4P9-4
2J9-2
2J9-2
C
TR
TR
CW
CW
TR
TR
CW
CW
R
2J9-4
2J9-4
4P9-2
4P9-2
9
5RT2
5RT2
5P10-1
5P10-1
5P10-2
5P10-2
SPLICE
SPLICE
SPLICE
SPLICE
DEVICE PREFIX LOCATION CODE
DEVICE PREFIX LOCATION CODE
AREA
AREA
L1
L1
1
MAIN CONTROL PANEL
MAIN CONTROL PANEL
2
SUPPLY FAN AND COIL SECTION
SUPPLY FAN AND COIL SECTION
3
MIXING BOX SECTION
MIXING BOX SECTION
4
5
EXTERNAL PIPING
EXTERNAL PIPING
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
6
ELECTRIC HEAT CONTROL BOX
ELECTRIC HEAT CONTROL BOX
7
FIELD INSTALLED DEVICE
FIELD INSTALLED DEVICE
BLK
BLK
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
4A(WHT)
4A(WHT)
WHT,
WHT,
BRN
BRN
COM
COM
COM
COM
1K1
1K2
1K1
1K2
1K1
1K2
1K2
1K1
LOW
LOW
LOW
LOW
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
BLK,BLK
BLK,BLK
5A
5A
HI HI
HI HI
BLK
BLK
1T1
1T1
YEL
YEL
24V
24V
75VA
75VA
1U1
1U1
TB1-1 24V
TB1-1 24V
POWER
POWER
J1
J1
17A(BLK)
17A(BLK)
1 HIGH SPEED
1 HIGH SPEED
1P1-1
1P1-1
14A(YEL)
14A(YEL)
2 EXHAUST
2 EXHAUST
2 EXHAUST
2 EXHAUST
1P1-2
1P1-2
1P1-3
1P1-3
1P1-3
1P1-3
1P2-2
1P2-2
1P2-2
1P2-2
1P2-2
1P2-2
1P2-2
1P2-2
1P2-2
1P2-2
2J3-2
2J3-2
2J3-2
2J3-2
2J3-2
2J3-2
2J3-2
2J3-2
2J3-2
2J3-2
1J2-2
1J2-2
1J2-2
1J2-2
1J2-2
1J2-2
1J2-2
1J2-2
1J2-2
1J2-2
1P1-5
1P1-5
1P1-5
1P1-5
1P1-5
1P1-5
1P1-5
1P1-5
1P1-5
1P1-5
1P2-2
1P2-2
1P2-3
1P2-3
1P2-3
1P2-3
19B
19B
C
5 ON/OFF
5 ON/OFF
2J3-3
2J3-3
2J3-3
2J3-3
1J2-3
1J2-3
1J2-3
1J2-3
1J2-2
1J2-2
1P1-6
1P1-6
1P1-6
1P1-5
1P1-5
1P1-6
CLG
CLG
1P5-2
1P5-2
1P5-2
1P5-2
1P5-2
1P5-2
1P5-2
1P5-2
1P5-2
1P5-2
15C(ORG)
15C(ORG)
9 STAGE 1
9 STAGE 1
2J6-2
2J6-2
2J6-2
2J6-2
2J6-2
2J6-2
2J6-2
2J6-2
2J6-2
2J6-2
1J5-2
1J5-2
1J5-2
1J5-2
1J5-2
1J5-2
1J5-2
1J5-2
1J5-2
1J5-2
1P1-9
1P1-9
1P1-9
1P1-9
1P1-9
1P1-9
1P1-9
1P1-9
1P1-9
1P1-9
1P1-9
1P1-9
1P5-3
1P5-3
1P5-3
1P5-3
16C(PUR)
16C(PUR)
10 STAGE 2
10 STAGE 2
1J5-3
1J5-3
1J5-3
1J5-3
2J6-3
2J6-3
2J6-3
2J6-3
1P1-10
1P1-10
1P1-10
1P1-10
1P1-10
1P1-10
1J8-1
1J8-1
1J8-1
1J8-1
1J8-1
1J8-1
B
12A(PNK)
12A(PNK)
11 OPEN
11 OPEN
1P8-1
1P8-1
1P8-1
1P8-1
1P8-1
1P8-1
1P1-11
1P1-11
1P1-11
1P1-11
1P1-11
1P1-11
OAD
OAD
1J8-2
1J8-2
1J8-2
1J8-2
1J8-2
1J8-2
B
13A(BRN)
13A(BRN)
12 CLOSE
12 CLOSE
1P8-2
1P8-2
1P8-2
1P8-2
1P8-2
1P8-2
1P1-12
1P1-12
1P1-12
1P1-12
1P1-12
1P1-12
TB4-1 BOP
TB4-1 BOP
GENERIC BOP
GENERIC BOP
GENERIC
GENERIC
TB4-2 24V
TB4-2 24V
1P11-1
1P11-1
2J10-1
2J10-1
1J11-1
1J11-1
1P11-2
1P11-2
2J10-2
2J10-2
1J11-2
1J11-2
2RT1
2RT1
7RT1
7RT1
CONDENSATE
CONDENSATE
SPLICE
SPLICE
J3-3
J3-3
2P12-1
2P12-1
2J12-1
2J12-1
AI-2 DAT
AI-2 DAT
J3-4
J3-4
2P12-2
2P12-2
2J12-2
2J12-2
7RT3
7RT3
SPLICE
SPLICE
J3-5
J3-5
AI-3-OAT
AI-3-OAT
J3-6
J3-6
Typical Wiring
Diagram
LOCATION
LOCATION
DEVICE
DEVICE
DESCRIPTION
DESCRIPTION
DESIGNATION
DESIGNATION
1CB1
1CB1
TRANSFORMER CIRCUIT BREAKER
TRANSFORMER CIRCUIT BREAKER
1K1
1K1
SUPPLY FAN CONTACTOR
SUPPLY FAN CONTACTOR
1K3
1K3
DX RELAY
DX RELAY
1T1
1T1
CONTROL POWER TRANSFORMER
CONTROL POWER TRANSFORMER
1TB1-L1,-L2
1TB1-L1,-L2
CONTROL TERMINAL BLOCK
CONTROL TERMINAL BLOCK
1U1
1U1
ZN CONTROLLER
ZN CONTROLLER
2B1
2B1
SUPPLY FAN MOTOR
SUPPLY FAN MOTOR
2S2
2S2
CONDENSATE OVERFLOW SWITCH
CONDENSATE OVERFLOW SWITCH
2S5
2S5
FAN STATUS SWITCH
FAN STATUS SWITCH
2S7
2S7
ELECTRIC HT LOCKOUT SWITCH
ELECTRIC HT LOCKOUT SWITCH
2S8
2S8
EVAP DEFROST FROSTAT
EVAP DEFROST FROSTAT
4U4
4U4
MIXING BOX DAMPER ACTUATOR
MIXING BOX DAMPER ACTUATOR
2B1
2B1
2B1
2B1
2B1
2B1
2B1
2B1
2B1
2B1
7K5
7K5
EXHAUST FAN CONTROL RELAY
EXHAUST FAN CONTROL RELAY
M
1
3
1
3
1
7RT1
7RT1
DISCHARGE AIR TEMP SENSOR
DISCHARGE AIR TEMP SENSOR
7RT3
7RT3
OUTSIDE AIR TEMP SENSOR
OUTSIDE AIR TEMP SENSOR
7S6
7S6
FUSED DISCONNECT SWITCH
FUSED DISCONNECT SWITCH
GRN
GRN
7U6
7U6
ZONE SENSOR MODULE
ZONE SENSOR MODULE
P
PLUG CONNECTOR
PLUG CONNECTOR
J
JACK CONNECTOR
JACK CONNECTOR
1TB1-L2
1TB1-L2
B(BLK)
B(BLK)
11
11
D(WHT)
D(WHT)
D
GND TB1-2
GND TB1-2
6
7U6
7U6
ZONE TB3-1
ZONE TB3-1
1
ZONE
ZONE
GND TB3-2
GND TB3-2
2
COM
COM
SET TB3-3
SET TB3-3
3
CSP
CSP
FAN TB3-4
FAN TB3-4
4
FAN SWITCH
FAN SWITCH
TB2-6
TB2-6
6
COMM LOW(-)
COMM LOW(-)
-
COMM
COMM
TB2-5
TB2-5
5
COMM HI(+)
COMM HI(+)
+
LO(-)
LO(-)
TB2-4
TB2-4
-
TRACER
TRACER
COMM
COMM
COMM OUT
COMM OUT
HI(+)
HI(+)
TB2-3
TB2-3
+
SPLICE AND
SPLICE AND
INSULATE SHIELDS
INSULATE SHIELDS
TB2-2
TB2-2
LO(-)
LO(-)
-
TRACER
TRACER
COMM
COMM
COMM IN
COMM IN
TB2-1
TB2-1
HI(+)
HI(+)
+
2S3
2S3
2S2
2S2
23A(PUR)
23A(PUR)
2P13-1
2P13-1
B
J2-3
J2-3
2J13-1
2J13-1
B
2P13-2
2P13-2
BI-2
BI-2
GREEN PLUG
GREEN PLUG
24A(PUR)
24A(PUR)
J2-4
J2-4
J2-5
J2-5
BI-3
BI-3
OCC/UNOCC
OCC/UNOCC
J2-6
J2-6
2S5
2S5
25A(YEL)
25A(YEL)
J2-7
J2-7
BI-4
BI-4
P
d
FAN-STAT
FAN-STAT
26A(YEL)
26A(YEL)
J2-8
J2-8
LEGEND
LEGEND
LINE
LINE
NUMBER
NUMBER
16
16
20
20
24
24
16
16
18
18
11
11
32
32
36
36
23
23
24
24
27
27
21
21
33
33
35
35
3
20
20
1K1-10,12
1K1-10,12
1K3-23
1K3-23
7
2J13-2
2J13-2
OR FIELD RECONFIGURED
OR FIELD RECONFIGURED
AS GENERIC
AS GENERIC
BCXC-SVX01A-EN
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