![background image](http://html.mh-extra.com/html/carrier/58meb/58meb_installation-start-up-and-operating-instructions-manual_2562803028.webp)
-- 28 --
115-V FIELD-
SUPPLIED
DISCONNECT
AUXILIARY
J-BOX
24-V
TERMINAL
BLOCK
THREE-WIRE
HEATING-ONLY
FIVE WIRE
NOTE 1
NOTE 2
FIELD-SUPPLIED
DISCONNECT
CONDENSING
UNIT
TWO
WIRE
FURNACE
C
O
N
T
R
O
L
R
G
COM
W
C
R
G
Y
GND
GND
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
208/230- OR
460-V
THREE
PHASE
208/230-V
SINGLE
PHASE
BLOWER DOOR SWITCH
WHT
BLK
WHT
BLK
NOTES:
Connect Y-terminal in furnace as shown for proper blower operation.
Some thermostats require a "C" terminal connection as shown.
If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
W
Y/Y2
GND
THERMOSTAT
TERMINALS
1.
2.
3.
A99440
Fig. 31 -- Typical Heating and Cooling Application Wiring Diagram
Table 6 –
Electrical Data
FURNACE
SIZE
VOLTS
HERTZ
PHASE
OPERATING VOLTAGE
MAX
UNIT
AMPS
{
UNIT
AMPACITY
MAX
WIRE
LGTH
FT (M)
‡
MAX
FUSE/CKT
BKR AMPS**
MIN
WIRE
GAGE
MAX*
MIN*
040---12/036040
115---60---1
127
104
8
10.8
34 (10.3)
15
14
060---12/036060
115---60---1
127
104
9.4
12.5
29 (8.8)
15
14
080---12/036080
115---60---1
127
104
9.4
12.5
29 (8.8)
15
14
080---16/048080
115---60---1
127
104
9.6
12.8
29 (8.8)
15
14
100---20/060100
115---60---1
127
104
12.1
15.9
36 (10.9)
20
12
120---20/060120
115---60---1
127
104
12.1
15.9
36 (10.9)
20
12
* Permissible limits of voltage range at which unit will operate satisfactorily.
† Unit ampacity = 125 percent of largest operating component’s full load amps plus 100 percent of all other potential operating components’ (EAC, humidifier,
etc.) full load amps.
‡ Length shown is a measured one way along wire path between unit and service panel for maximum 2 percent voltage drop.
** Time-delay type is recommended.
FURNACE MAY NOT OPERATE
Failure to follow this caution may result in intermittent
furnace operation.
Furnace control must be grounded for proper operation or
control will lock out. Control is grounded through
green/yellow wire connected to gas valve and burner
box screw.
CAUTION
!
115–V WIRING
Before proceeding with electrical connections, make certain that
voltage, frequency, and phase correspond to that specified on
furnace rating plate. Also, check to be sure that service provided
by power supply is sufficient to handle load imposed by this
equipment. Refer to rating plate or Table 6 for equipment
electrical specifications.
The furnace must be electrically grounded in accordance with
local codes; or in the absence of local codes, with the National
Electric Code ANSI/NFPA 70 and/or the Canadian Electric Code,
CSA C22.1, Part I, if an external electrical source is utilized.
Use a separate, branch electrical circuit containing a properly
sized fuse or circuit breaker for this furnace. See Table 6 for wire
size and fuse specifications. A disconnecting means must be
located within sight from and readily accessible to furnace.
NOTE
:
Proper polarity and proper grounding must be
maintained for 115-v wiring. If polarity is incorrect, control LED
status indicator will flash rapidly and furnace will NOT operate.
COPPER
WIRE ONLY
ELECTRIC
DISCONNECT
SWITCH
ALUMINUM
WIRE
A93033
Fig. 32 -- Disconnect Switch and Furnace