Table of Contents
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BCXB with DX coil, hydronic heating, & 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
BLUE CONNECTORS USED FOR COOLING CIRCUIT,
BLUE CONNECTORS USED FOR COOLING CIRCUIT,
RED CONNECTORS USED FOR HEATING CIRCUIT.
RED CONNECTORS USED FOR HEATING CIRCUIT.
BLUE WIRES USED FOR COOLING CIRCUIT, RED
BLUE WIRES USED FOR COOLING CIRCUIT, RED
12
12
WIRES USED FOR HEATING CIRCUIT.
WIRES USED FOR HEATING CIRCUIT.
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
,M
,M
(BLK)
(BLK)
18
18
10
10
19
19
1K1
1K1
W
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
5P3-1
5P3-1
5P3-1
5P3-1
5P3-1
5P3-1
5P3-1
5P3-1
5P3-1
5P3-1
1TB1-L1
1TB1-L1
K
23
23
DX COOLING
DX COOLING
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
1P2-3
1P2-3
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
5P6-1
5P6-1
5P6-1
5P6-1
5P6-1
5P6-1
5P6-1
5P6-1
5P6-1
5P6-1
1TB1-L1
1TB1-L1
M
L
25
25
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
8
8
1P5-3
1P5-3
26
26
1J5-3
1J5-3
1P8-3
1P8-3
1P8-3
1P8-3
1P8-3
1P8-3
E(WHT)
E(WHT)
27
27
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
29
29
30
30
31
31
32
32
33
33
34
34
35
35
36
36
37
37
38
38
39
39
40
40
41
BCXC-SVX01A-EN
42
43
Maintenance
460/60/3
460/60/3
L1
L1
L2
L2
GRN
GRN
BLK
BLK
BLK
BLK
1S1
1S1
EQUIPMENT
EQUIPMENT
GROUND
GROUND
1A
1A
2A
2A
BLK/RED
BLK/RED
1CB1
1CB1
BLU
BLU
5
5
1K3
1K3
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
5P4-1
5P4-1
5P4-1
5P4-1
5P4-1
5P4-1
5P4-1
5P4-1
5P4-1
5P4-1
G
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
2J3-2
2J3-2
2J3-2
2J3-2
2J3-2
2J3-2
2J3-2
2J3-2
2J3-2
2J3-2
2
4
1K3
1K3
5P3-3
5P3-3
5P4-3
5P4-3
5P4-3
5P4-3
5P4-3
5P4-3
5P3-3
5P3-3
5P3-3
5P3-3
2S8
2S8
G,J
G,J
38A
38A
2J3-3
2J3-3
5J4-3
5J4-3
5J4-3
5J4-3
5J4-3
5J4-3
2J3-3
2J3-3
2J3-3
2J3-3
1
3
7B3
7B3
(7VA MAX)
(7VA MAX)
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
5P7-1
5P7-1
5P7-1
5P7-1
5P7-1
5P7-1
5P7-1
5P7-1
5P7-1
5P7-1
15A
15A
M
D
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
2J6-2
2J6-2
2J6-2
2J6-2
2J6-2
2J6-2
2J6-2
2J6-2
2J6-2
2J6-2
5P6-3
5P6-3
5P7-3
5P7-3
5P7-3
5P7-3
5P7-3
5P7-3
5P6-3
5P6-3
5P6-3
5P6-3
2J6-3
2J6-3
5J7-3
5J7-3
5J7-3
5J7-3
5J7-3
5J7-3
2J6-3
2J6-3
2J6-3
2J6-3
7U4
7U4
4P9-3
4P9-3
2J9-1
2J9-1
SPLICE
SPLICE
SPLICE
SPLICE
TR1
TR1
CCW
CCW
2J9-3
2J9-3
4P9-1
4P9-1
4P9-4
4P9-4
2J9-2
2J9-2
SPLICE
SPLICE
SPLICE
SPLICE
TR
TR
CW
CW
2J9-4
2J9-4
4P9-2
4P9-2
9
5RT2
5RT2
5P10-1
5P10-1
5P10-2
5P10-2
SPLICE
SPLICE
DEVICE PREFIX LOCATION CODE
DEVICE PREFIX LOCATION CODE
LOCATION
LOCATION
AREA
AREA
L3
L3
MAIN CONTROL PANEL
MAIN CONTROL PANEL
1
2
SUPPLY FAN AND COIL SECTION
SUPPLY FAN AND COIL SECTION
3
4
MIXING BOX SECTION
MIXING BOX SECTION
5
EXTERNAL PIPING
EXTERNAL PIPING
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
7S6
6
7
FIELD INSTALLED DEVICE
FIELD INSTALLED DEVICE
BLK
BLK
3A
3A
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
4A
4A
A, A,
BLK/RED
BLK/RED
2B1
2B1
2B1
2B1
2B1
2B1
2B1
2B1
COM
COM
COM
COM
1K2
1K2
1K2
1K2
1K1
1K1
1K1
1K1
A,BLK
A,BLK
5A
5A
LOW
LOW
LOW
LOW
1
3
1
3
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
1K1
A
6A
6A
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
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
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
1J2-3
1J2-3
1J2-3
1J2-3
1J2-2
1J2-2
1P1-6
1P1-6
1P1-6
1P1-6
1P1-5
1P1-5
CLG
CLG
1P5-2
1P5-2
1P5-2
1P5-2
1P5-2
1P5-2
1P5-2
1P5-2
1P5-2
1P5-2
B
C
9 ON/OFF
9 ON/OFF
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
HTG
HTG
1P5-3
1P5-3
1P5-3
1P5-3
1J5-3
1J5-3
1J5-3
1J5-3
1P1-10
1P1-10
1P1-10
1P1-10
1P1-10
1P1-10
1J8-1
1J8-1
1J8-1
1J8-1
1J8-1
1J8-1
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
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
FRZ-STAT
FRZ-STAT
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
B
34A(BRN)
34A(BRN)
J3-3
J3-3
2P12-1
2P12-1
2J12-1
2J12-1
AI-2 DAT
AI-2 DAT
B
35A(BRN)
35A(BRN)
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
LEGEND
LEGEND
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
1S1
1S1
MANUAL DISCONNECT SWITCH
MANUAL DISCONNECT SWITCH
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
2RT1
2RT1
DISCHARGE AIR TEMP SENSOR
DISCHARGE AIR TEMP SENSOR
2S2
2S2
CONDENSATE OVERFLOW SWITCH
CONDENSATE OVERFLOW SWITCH
2S3
2S3
FREEZE-STAT
FREEZE-STAT
2S8
2S8
EVAP DEFROST FROSTAT
EVAP DEFROST FROSTAT
7B3
7B3
HEATING COIL VALVE MOTOR
HEATING COIL VALVE MOTOR
7K5
7K5
EXHAUST FAN CONTROL RELAY
EXHAUST FAN CONTROL RELAY
M
7RT3
7RT3
OUTSIDE AIR TEMP SENSOR
OUTSIDE AIR TEMP SENSOR
7S6
7S6
FUSED DISCONNECT SWITCH
FUSED DISCONNECT SWITCH
GRN
GRN
7U4
7U4
MIXING BOX DAMPER ACTUATOR
MIXING BOX DAMPER ACTUATOR
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
21A(GRA)
21A(GRA)
J2-1
J2-1
BI-1
BI-1
22A(GRA)
22A(GRA)
J2-2
J2-2
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
LINE
LINE
NUMBER
NUMBER
16
16
20
20
24
24
7
16
16
18
18
11
11
33
33
32
32
30
30
24
24
25
25
21
21
35
35
3
27
27
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
69
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