Carrier 58MTA Installation, Start-Up, And Operating Instructions Manual page 21

BLK BLK
WHT WHT
GND
115-V FUSED
DISCONNECT
SWITCH
(WHEN REQUIRED)
Fig. 27—Typical Heating and Cooling Application Wiring Diagram 1-Stage Thermostat and Condensing Unit
BLK
BLK
WHT WHT
GND
115-V FUSED
DISCONNECT
SWITCH
(WHEN REQUIRED)
Fig. 28—Typical Heating and Cooling Application Wiring Diagram 2-Stage Thermostat and Condensing Unit
1-STAGE THERMOSTAT TERMINALS
W
FIVE
WIRE
TWO-WIRE
HEATING-
ONLY
W2
COM
W/W1
GND
Y/Y2
JUNCTION
BOX
R
CONTROL
G
BOX
24-V
TERMINAL
BLOCK
FURNACE
2-STAGE THERMOSTAT TERMINALS
SEVEN
W2
WIRE
THREE-WIRE
HEATING-
ONLY
W2
COM
W/W1
GND
Y/Y2
JUNCTION
BOX
R
CONTROL
G
BOX
24-V
TERMINAL
BLOCK
FURNACE
Y R G C
GND
GND
CONDENSING
UNIT
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.
W1 Y2 R G Y1 C
GND
2-SPEED
CONDENSING
UNIT
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.
21
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
FIELD-SUPPLIED
FUSED DISCONNECT
208/230- OR
460-V
THREE
PHASE
GND
208/230-V
SINGLE
PHASE
GND
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
FIELD-SUPPLIED
FUSED DISCONNECT
208/230- OR
460-V
THREE
PHASE
GND
208/230-V
SINGLE
C
PHASE
Y1
GND
Y2
GND
A99071
A99072