Field Wiring - Carrier 58MEC Service And Maintenance Instructions

FIVE
WIRE
TWO-WIRE
HEATING-
ONLY
BLK BLK
WHT WHT
GND
GND
115-V FUSED JUNCTION
DISCONNECT BOX
SWITCH
CONTROL
(WHEN REQUIRED)
FURNACE
SEVEN
WIRE
THREE-WIRE
HEATING-
ONLY
BLK
BLK
WHT WHT
GND
GND
115-V FUSED JUNCTION
DISCONNECT BOX
SWITCH
CONTROL
(WHEN REQUIRED)
FURNACE
1-STAGE THERMOSTAT TERMINALS
W Y R
W2
COM
W/W1
Y/Y2
R
G
BOX
24-V
TERMINAL
BLOCK
NOTES: 1. Connect Y-terminal as shown for proper operation.
2. Some thermostats require a "C" terminal connection as shown.
3. If any of the original wire, as supplied, must be replaced,
use same type or equivalent wire.

Field Wiring

Fig. 15 - -
2-STAGE THERMOSTAT TERMINALS
W2 W1 Y2 R G
W2
COM
W/W1
Y/Y2
R
G
BOX
24-V
TERMINAL
BLOCK
NOTES: 1. Connect Y-terminal as shown for proper operation.
2. Some thermostats require a "C" terminal connection as shown.
3. If any of the original wire, as supplied, must be replaced,
use same type or equivalent wire.
Field Wiring
Fig. 16 - -
12
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
G C
FIELD-SUPPLIED
FUSED DISCONNECT
GND
GND
CONDENSING
UNIT
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
Y1 C
FIELD-SUPPLIED
FUSED DISCONNECT
GND
C
Y1
GND
Y2
2-SPEED
CONDENSING
UNIT
208/230- OR
460-V
THREE
PHASE
GND
208/230-V
SINGLE
PHASE
GND
A99071
208/230- OR
460-V
THREE
PHASE
GND
208/230-V
SINGLE
PHASE
GND
A99072