58TN0B/58TN1B: Installation, Start–Up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
18
A190279
Fig. 26 – Field-Supplied External Electrical Box on Furnace Casing
J-BOX RELOCATION
NOTE: If factory location of J-Box is acceptable, go to next section
(ELECTRICAL CONNECTION TO J-BOX).
NOTE: On 14-in. (356 mm) wide casing models, the J-Box shall not be
relocated to other side of furnace casing when the vent pipe is routed
within the casing.
1. Remove and save two screws holding J-Box, see Fig. 27.
NOTE: The J-Box cover need not be removed from the J-Box in order
to move the J-Box. Do NOT remove green ground screw inside J-Box,
see Fig. 27.
2. Cut wire tie on loop in furnace wires attached to J-Box.
3. Move J-Box to desired location.
4. Fasten J-Box to casing with the two screws removed in Step 1.
5. Route J-Box wires within furnace away from sharp edges, rotating
parts and hot surfaces.
A10291
Fig. 27 – Relocating J-Box
Electrical Connection to J-Box
Electrical Box on Furnace Casing Side
Table 9 – Electrical Data
FURNACE
SIZE
VOLTS-
HERTZ-
PHASE
OPERATING
VOLTAGE RANGE
*
*. Permissible limits of the voltage range at which the unit operates satisfactorily.
MAX. UNIT
AMPS
UNIT
AMPACITY
†
†. 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.
MIN. WIRE
GAUGE
MAX. WIRE LENGTH -
FT (M)
‡
‡. Length shown is as measured 1 way along wire path between furnace and service panel for maximum 2 percent voltage drop.
MAX. FUSE OR
CKT BKR AMPS
**
**. Time-delay type is recommended.
Max. Min. Feet Meters
045C17--12 115-60-1 127 104 10.5 9.2 14 25 7.9 15
070C14--12 115-60-1 127 104 8.0 6.7 14 34 10.4 15
070C17--16 115-60-1 127 104 10.5 9.2 14 26 7.9 15
070C21--20 115-60-1 127 104 13.8 12.5 12 31 9.4 20
090C17--16 115-60-1 127 104 8.6 6.7 14 32 9.8 15
090C21--20 115-60-1 127 104 14.4 12.5 12 31 9.4 20
110C21--20 115-60-1 127 104 14.7 12.5 12 30 9.1 20
135C24--22 115-60-1 127 104 13.9 11.7 12 32 9.8 20
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. 26.
COPPER
WIRE ONLY
ELECTRIC
DISCONNECT
SWITCH
ALUMINUM
WIRE
WARNING
!
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 filed 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.
Factory
Installed
Alternate
Location
To Next Page
Loading...
