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59TN6C: Installation, Start-up, Operating, Service and Maintenance Instructions
ELECTRIC
DISCONNECT
SWITCH
Fig. 33 – Field-Supplied External Electrical Box on Furnace Casing
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in personal injury, death, or
property damage.
Do not connect aluminum wire between disconnect switch and furnace.
Use only copper wire. See
Fig.
VOLTS-
FURNACE SIZE
HERTZ-
PHASE
040C14--10
115-60-1
060C17--14
115-60-1
080C17--14
115-60-1
080C21--20
115-60-1
100C21--22
115-60-1
120C24--22
115-60-1
*. Permissible limits of the voltage range at which the unit operates 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 as measured one way along wire path between furnace and service panel for maximum 2 percent voltage drop.
**. Time-delay type is recommended.
115-V WIRING
Furnace must have a 115-V power supply properly connected and
grounded.
NOTE: Proper polarity must be maintained for 115-V wiring. If polarity
is incorrect, control LED status indicator light will flash rapidly and
Status code (10.1) is displayed. The furnace will NOT operate.
Use a separate, fused branch electrical circuit with a properly sized fuse
or circuit breaker for this furnace. See
specifications. A readily accessible means of electrical disconnect must
be located within sight of the furnace.
Verify that the voltage, frequency, and phase correspond to that specified
on unit rating plate. Also, check to be sure that service provided by
utility is sufficient to handle load imposed by this equipment. Refer to
rating plate or
Table 11
for equipment electrical specifications.
U.S.A. Installations: Make all electrical connections in accordance with
the current edition of the National Electrical Code (NEC) NFPA 70 and
any local codes or ordinances that might apply.
Canada Installations: Make all electrical connections in accordance
with the current edition of the Canadian Electrical Code CSA C22.1 and
any local codes or ordinances that might apply.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
COPPER
WIRE ONLY
ALUMINUM
WIRE
33.
Table 11 – Electrical Data
OPERATING VOLTAGE
*
RANGE
Maximum*
Minimum*
127
104
127
104
127
104
127
104
127
104
127
104
Table 11
for wire size and fuse
A190279
Fig. 34 – Typical Two-Stage Field Wiring Diagram
MAXIMUM
MINIMUM
UNIT
UNIT
WIRE SIZE
†
AMPACITY
AMPS
7.1
9.8
7.3
10.0
7.1
9.8
13.1
17.3
13.2
17.4
11.9
15.7
FURNACE MAY NOT OPERATE HAZARD
Failure to follow this caution may result in intermittent furnace
operation.
Furnace control must be grounded for proper operation or else control
will lock out. Control must remain grounded through green/yellow wire
routed to gas valve and manifold bracket screw.
J-Box Installation
FIRE OR ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury, death, or
property damage.
High voltage field connections must be located in J-Box with furnace,
or in field supplied external disconnect mounted to furnace.
If field-supplied manual disconnect switch is to be mounted on furnace
casing side, select a location where a drill or fastener cannot damage
electrical or gas components.
25
MAXIMUM
WIRE LENGTH
‡
FT (M)
AWG
Feet
Meters
14
37
11.5
14
37
11.2
14
37
11.5
12
33
10.1
12
33
10.0
12
36
11.1
CAUTION
!
WARNING
!
A230059
MAXIMUM FUSE
OR CKT BKR
**
AMPS
15
15
15
20
20
20
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