Electrical Connections; 115-V Wiring - Carrier 58MTB Installation, Start-Up, And Operating Instructions Manual

VOLTS—
UNIT
HERTZ—
SIZE
PHASE
060–12 115-60-1
080–12 115-60-1
080–16 115-60-1
100–16 115-60-1
100–20 115-60-1
120–20 115-60-1
* 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 measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.
** Time-delay type is recommended.
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Step 8—Electrical Connections
See Fig. 31, 32, and 50A-H for field wiring diagram showing
typical field 115-v and 24-v wiring. Check all factory and field
electrical connections for tightness.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Blower access door switch opens 115-v power to furnace
control. No component operation can occur. Do not bypass or
close switch with panel removed.
Field-supplied wiring shall conform with the limitations of 63°F
rise.
Table 6—Electrical Data
OPERATING
VOLTAGE RANGE
Max* Min*
127 104
127 104
127 104
127 104
127 104
127 104
COMBUSTION-AIR PIPE GROMMETS
COMBUSTION
-AIR PIPE
GAS LINE
VENT PIPE
GAS LINE GROMMET
VENT PIPE GROMMET
NOTE: PIPE GROMMETS AND ENTRY HOLE FILLER
PLUGS ARE INCLUDED IN FACTORY-SUPPLIED
LOOSE PARTS BAG
Fig. 30—Typical Gas Pipe Arrangement
MAX
UNIT
UNIT
AMPACITY†
AMPS
8.4 11.3
8.1 10.8
11.6 15.3
11.6 15.4
13.3 17.5
12.9 16.8
UNUSED 1/2 -IN.
DIAMETER GAS
CONN. HOLE
A05057
UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent unit
operation.
Furnace control must be grounded for proper operation or
control will lock out. Control is grounded through
green/yellow wire routed to gas valve C-terminal and burner
box screw.

115-V WIRING

Before proceeding with electrical connections, make certain that
voltage, frequency, and phase correspond to that specified on the
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.
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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.
25
MIN MAX WIRE
WIRE LENGTH OR CKT BKR
SIZE (FT)‡
14 33
14 34
12 37
12 37
12 33
12 34
GAS LINE ENTRY
HOLE FILLER PLUG
MAX FUSE
AMPS**
15
15
20
20
20
20