!CAUTION
FURNACE MAY NOT OPERATE
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.
115-V WIRING
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 7 for equipment electrical specifications.
U.S. Installations: Make all electrical connections in accordance with National Electrical Code (NEC) ANSI/NFPA 70-2008 and any local codes or ordinances that might apply.
Canadian Installations: Make all electrical connections in accordance with Canadian Electrical Code CSA C22.1 or authorities having jurisdiction.
!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.
Use a separate, fused branch electrical circuit with a properly sized fuse or circuit breaker for this furnace. See Table 7 for wire size and fuse specifications. A readily accessible means of electrical disconnect must be located within sight of the furnace.
NOTE: Proper polarity must be maintained for 115-v wiring. If polarity is incorrect, control LED status indicator light will flash rapidly and furnace will NOT operate.
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.
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. The ground screw is not threaded into the casing flange and can be lifted out of the clearance hole in casing while swinging the front edge of the J-Box outboard of the casing.
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 two screws removed in Step 1.
5.Route J-Box wires within furnace away from sharp edges, rotating parts and hot surfaces.
ELECTRICAL CONNECTION TO J-BOX
Field-Supplied Electrical Box on Furnace J-Box Bracket See Fig. 23.
1.Remove cover from furnace J-Box.
2.Attach electrical box to furnace J-Box bracket with at least two field-supplied screws through holes in electrical box into holes in bracket. Use blunt-nose screws that will not pierce wire insulation.
3.Route furnace power wires through holes in electrical box and J-Box bracket, and make field-wire connections in electrical box. Use best practices (NEC in U.S. and CSA C22.1 in Canada) for wire bushings, strain relief, etc.
4.Route and secure field ground wire to green ground screw on J-Box bracket.
5.Connect line voltage leads as shown in Fig. 25.
6.Reinstall cover to J-Box. Do not pinch wires between cover and bracket.
Electrical Box on Furnace Casing Side
See Fig. 23.
!WARNING
FIRE OR ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury, death, or property damage.
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.
1.Select and remove a hole knockout in the casing where the electrical box is to be installed.
NOTE: Check that duct on side of furnace will not interfere with installed electrical box.
2.Remove the desired electrical box hole knockout and positionthe hole in the electrical box over the hole in the furnace casing.
3.Fasten the electrical box to casing by driving two fieldsupplied screws from inside electrical box into casing steel.
4.Remove and save two screws holding J-Box. (See Fig. 22.)
5.Pull furnace power wires out of 1/2-in. (12 mm) diameter hole in J-Box. Do not loosen wires from strain-relief wire-tie on outside of J-Box.
6.Route furnace power wires through holes in casing and electrical box and into electrical box.
7.Pull field power wires into electrical box.
8.Remove cover from furnace J-Box.
9.Route field ground wire through holes in electrical box and casing, and into furnace J-Box.
10.Reattach furnace J-Box to furnace casing with screws removed in Step 4.
11.Secure field ground wire to J-Box green ground screw.
12.Complete electrical box wiring and installation. Connect line voltage leads as shown in Fig. 25. Use best practices (NEC in U.S. and CSA C22.1 in Canada) for wire bushings, strain relief, etc.
13.Reinstall cover to J-Box. Do not pinch wires between cover and bracket.
