Carrier 58MXA Service And Maintenance Instructions page 12

BLOWER OFF DELAY
PCB
JUMPER SELECT
Y1
90
DHUM
120
G
150
C om
24V 180
BLU
W J1
Y/Y2
TEST/TWIN
ORN
R
HUM
FU1
NOTE #6
WHT
SEC-2 SEC-1
LED 1
WHT
EAC-2 L2
RED
GRN/YEL
GRN/YEL
WHT
PL1
BHT/CLR BFANR BLWR
2
COOL
L1
FAN
HEAT
SPARE 1 SPARE 2 EAC-1
PR1
BLK (HI)
WHT
(COM)
BLWM
GRN/YEL
YEL
(MED HI)
BRN
OL
START CAP -1
NOTE #10
RED (LO)
BLU
BRN
(MED LO)
BFANR CONTINUOUS-FAN SELECT RELAY, SPDT
L
BHT/CLR BLOWER MOTOR SPEED CHANGE RELAY, SPDT
E
BLWR BLOWER MOTOR RELAY, SPST-(N.O.)
G BLWM BLOWER MOTOR, PERMANENT-SPLIT-CAPACITOR
CAP 1, 2 CAPACITOR
E
CPU MICROPROCESSOR AND CIRCUITRY
N
EAC-1 ELECTRONIC AIR CLEANER CONNECTION (115 VAC 1.0 AMP MAX.)
D
EAC-2 ELECTRONIC AIR CLEANER CONNECTION (COMMON)
FRS FLAME ROLLOUT SW. -MANUAL RESET, SPST-(N.C.)
FSE FLAME-PROVING ELECTRODE
FU 1 FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED
FU 2 FUSE OR CIRCUIT BREAKER CURRENT INTERRUPT DEVICE
(FIELD INSTALLED & SUPPLIED)
GND EQUIPMENT GROUND
GV GAS VALVE-REDUNDANT
GVR 1, 2 GAS VALVE RELAY, DPST-(N.O.)
HSI HOT SURFACE IGNITER (115 VAC)
HSIR HOT SURFACE IGNITER RELAY, SPST-(N.O.)
HUM 24VAC HUMIDIFIER CONNECTION (0.5 AMP. MAX.)
IDM INDUCED DRAFT MOTOR, PSC
IDR INDUCED DRAFT MOTOR RELAY, SPST-(N.O.)
ILK BLOWER ACCESS PANEL INTERLOCK SWITCH, SPST-(N.O.)
J1 BLOWER - OFF DELAY JUMPER SELECTOR
JB JUNCTION BOX
LED LIGHT-EMITTING DIODE FOR STATUS CODES - AMBER
LGPS LOW GAS PRESSURE SWITCH, SPST-(N.O.)
LS LIMIT SWITCH, AUTO-RESET, SPST (N.C.)
(WHEN USED)
LGPS
PRS
ORN
NOTE #11
BLU
RED RED
LS FRS
RED
GRN/YEL
BLU
RED
RED
WHT
PL4
YEL
WHT
3
FSE
GRN/YEL
2
PL2
1
BLK
1
PL3
WHT
BLK
BLK
BLK
WHT (COM)
WHT
BLK
FUSED OR CIRCUIT BREAKER
DISCONNECT SWITCH (WHEN REQ'D)
JB
WHT
WHT
BLK BLK
ILK
GND
OL AUTO-RESET INTERNAL MOTOR OVERLOAD
TEMPERATURE SWITCH (N.C.)
PCB PRINTED CIRCUIT BOARD CONTROL
PL1 11-CIRCUIT PCB CONNECTOR
PL2 2-CIRCUIT CONNECTOR
PL3 2-CIRCUIT HSI, CONNECTOR
PL4 3-CIRCUIT IDM EXTENSION CONNECTOR
PRS PRESSURE SWITCH, SPST-(N.O.)
TEST/TWIN COMPONENT TEST & TWIN TERMINAL
TRAN TRANSFORMER-115VAC/24VAC
JUNCTION
UNMARKED TERMINAL
PCB CONTROL TERMINAL
FACTORY WIRING (115VAC)
FACTORY WIRING (24VAC)
FIELD WIRING (115VAC)
FIELD WIRING (24VAC)
CONDUCTOR ON CONTROL PCB
FIELD WIRING SCREW TERMINAL
FIELD EARTH GROUND
EQUIPMENT GROUND
FIELD SPLICE
PLUG RECEPTACLE
Fig. 16—Wiring Diagram
TO 115VAC FIELD DISCONNECT
NOTE #2
L2
L1
ILK
YEL
L1
FAN
BLWR
GV
M
C
EAC-1
GRN/YEL
HSIR
NOTE #3
IDR
BLK
PR1
WHT
TRAN
CAP -2
TEST/TWIN
BRN BRN
M
NOTE #6
AUX F U 1
IDM
OL
WHT
2 HUM
1
R
W
NOTE #2
NEUTRAL
FU2
Y/Y2
L1
DHUM
Y1
G
C
OM
PCB
NOTE #5
NOTES:
1. If any of the original equipment wire is replaced use wire rated for 105°C.
2. Use only copper wire between the disconnect switch and the furnace junction box (JB).
3. This wire must be connected to furnace sheet metal for control to prove flame.
4. Symbols are electrical representation only.
5. Solid lines inside PCB are printed circuit board conductors and are not included in legend.
6. Replace only with a 3 amp fuse.
7. Inducer (IDM) and blower (BLWM) motors contain internal auto-reset thermal overload switches (OL).
8. Neutral connections are interchangeable within the NEUTRAL connector block.
9. Blower motor speed selections are for average conditions, see installation instructions for details on
optimum speed selection.
10. YELLOW lead not on all motors.
11. Factory connected when LGPS is not used.
12. Ignition-lockout will occur after four consecutive unsuccessful trials-for-ignition. Control will
auto-reset after three hours.
13. Blower-on delay: gas heating 60 seconds, cooling or heat pump 2 seconds.
14. Blower-off delay: gas heating selections are 90, 120, 150 or 180 seconds, cooling or heat pump
90 seconds or 5 seconds when dehumidify call is active.
12
SCHEMATIC DIAGRAM
(NATURAL GAS & PROPANE)
GND
EQUIPMENT GROUND
LO
FAN
MED LO
HEAT
MED HI
HI
START
SPARE-1
NOTE #10
OL
HI/LO
COOL
COM
1 HSI
1
2
2 PL3
PL2
115VAC
M
1
24VAC
3
PL4
CAP - 2
2
SEC-1 SEC-2
6
GVR-2
8
LGPS
2
PL1
NOTE #11
PRS
4
GVR-1
10
M
CPU
5
1
9 FSE
7
3
11
326796-101 REV. A
CAP-1
L2
EAC-2
BLWM
IDM
OL
AUX
FRS
LS
(WHEN USED)
GV
C
NOTE #3
A02157