Carrier FMC5X - Txv; Leak Dissipation System

FMC5X, FMC5Z: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
7
A240337
Fig. 7 – Wiring Diagram - ECM
TXV
NOTE: The TXVs are preset at the factory and do not need adjustment
for reliable operation.
LEAK DISSIPATION SYSTEM
The units come equipped with a factory wired R-454B leak detection
and dissipation system to ensure safe operation during a leak. The
system consists of a bracket, a PCB, a A2L Detection Sensor, and a drain
pan clip. Failure to install this system will result in potentially hazardous
conditions and improper equipment operation, and void all system
warranties and liabilities.
All units are shipped with the A2L Detection Sensor located on the back
side of the coil (Fig. 8).
A240338
Fig. 8 – Location of Dissipation Sensor
CO M
208 V
240 V




Cn3 5
Cn 7
Cn1 2
Cn 8
Cn1 5

De TAILE D REFERENC E
MANUA L INSTRUCTION S
SPEE D TAP S
Mediu m lo w
Lo w
Mediu m
Mediu m hIG H
hIG H
LED 1
contro l BOAR D
Sw6-1, 2
Sw7-1, 2
Sw7-3, 4
24 V
TRANSFORME R
G W/W 1
3
4
5
5
2
3
4
5
FAN spee d
t ap s
ON
1 1
R454B
SENSOR
FAN
MOTOR
PE
indoo r f a n mo t o r
RD
SW6
RD
RD
C
L
n
pe
1
2
3
4
5
BK
BK
cn1 4
cn 11
cn3 3
O/ B
O/ B
W1
W
W1
Y1
Y
R C
C
C
G
YL YL
5 4 3 2 1 C
cn2 6
Cn3 4
ON
1 2 3 4
ON
SW7
1 2 3 4
ON
ALARM
BK
Cn3 6

Factory code Date Revision
Jan. 26th, 2024 B
36 K
24/30 K
18 K
optiona l
FIEL D INS TALLE D
OR
YL
wh
YL wh rd bk gr or
WH
pu
BK
BK
WY C O/ B
PLU G
PL ATE
1
2
3
4
5
6
1
2
3
4
5
6
TO OUTDOOR UNIT
YL YELLO W
GR GREE N
BR BROW N
WH WHIT E
GY GR AY
RD RE D
BK BLAC K
PU PURPL E
NOTES:
1: Connect R to R, G to G, Y to Y, etc. See outdoor
instruction for details.
2: If some signal lines of CN36 are not used,
please wrap them up separately with CAP.
CAUTION:
1: Use copper wire (75℃ min) only between
disconnect switch and unit.
2: To be wired in accordance with NEC and local
codes.
3: If any of the original wires, as supplied, must be
replaced. Use the same or equivalent type wires.
4: If the input voltage is 208 V, please change the
transformer tap by taking the red wire to 208V
terminal.
5: The rated operating condition of Alarm is 24
VAC/1A or 30 VDC/1A or 250 VAC/1A.
STEADY ON
NORMAL OPERATION
POWER SUPPLY FAILURE
4 FLASH/CYCLE
3 FLASH/CYCLE
OFF
0
3
LED1 STATUS
CONTENT
4
STEADY FLASHING
REFRIGERANT LEAK
PROTECTION
R454B REFRIGERANT SENSOR
COMMUNICATION FAULT
R454B REFRIGERANT
SENSOR FAULT
8 FLASH/CYCLE
8
R454B REFRIGERANT SENSOR
OVER SERVICE LIFE
WIRING DIAGRAM
SEE NAME PLATE FOR VOLT&HERTZ
FIELD POWER WIRING
CAUTION:
NOT SUITABLE FOR USE ON SYSTEMS EXCEEDING 150V TO GROUND.
ATTENTION:
NE CONVIENT PAS AUXINSTALLATIONS DE PLUS DE 150V ALA TERRE.
DI P SWITC H
Switch ON position:
Switch position
is UP for ON
Switch OFF position:
Switch position
is DOWN for OFF
1 2
ON
1 2
ON
1 2
ON
1 2
ON
TO THERMOSTAT
O/ B
W1
Y1
R C
G
Sw6-3, 4
3 4
ON
3 41 2
ON
NOT USED
THE FACTORY
DEFAULT
THE FACTORY
DEFAULT
CLASS 2
CLASS 2
12
12 PLUG2- A
GROUN D
Plu g
POWE R IN
L1
L2
PE
PLUG1- A
PLUG1- B
PLUG2- B
WAR NI NG
!
PERSONAL INJURY OR PROPERTY DAMAGE
These instructions are exclusively intended for qualified contractors
and authorized installers.
Work on the refrigerant circuit with flammable refrigerant in safety
group A2L may only be carried out by authorized heating contractors.
These heating contractors must be trained in accordance with UL
60335-2-40, Section HH. The certificate of competence from an
industry accredited body is required.
Work on electrical equipment may only be carried out by a qualified
electrician.
Before initial commissioning, all safety related points must be checked
by the particular certified heating contractors. The system must be
commissioned by the system installer or a qualified person authorized
by the installer.
For installation of the indoor unit, refer to the corresponding
installation and operation manual. If an indoor unit is installed in an
unventilated area, the area shall be so constructed that should any
refrigerant leak, it will not stagnate so as to create a fire or explosion
hazard.
The appliance shall be stored so as to prevent mechanical damage from
occurring.
Do not stack combustible materials on the surface of the indoor unit.
WAR NI NG
!
PERSONAL INJURY OR PROPERTY DAMAGE
HAZARD
Failure to follow proper R-454B mitigation system installation
instructions can result in property damage, personal injury, or death.
If any fault codes are listed, please troubleshoot to prevent system
malfunction.