21
ELECTRICALSHOCK AND FIRE HAZARD
Failure to follow this warningcould result in personal
injury,death,or property damage.
The cabinet MUST have an uninterruptedor unbroken
ground according to NEC ANSI/NFPA 70--2008 or local
codes to minimize personal injury if an electrical fault
should occur.This may consist of electricalwire, conduit
approvedfor electricalground or a listed, groundedpower
cord (where permitted by local code) when installed in
accordance with existing electrical codes. Refer to the
power cordmanufacturer’s ratingsfor proper wire gauge.
Donot use gas piping asan electricalground.
!WARNING
FURNACEMAY NOT OPERATE
Failure to follow this caution may result in intermittent
furnace operation.
Furnacecontrol must be grounded for proper operation or
else controlwill lock out. Control must remain grounded
throughgreen/yellowwire routed to gas valveand manifold
bracket screw.
CAUTION
!
115--VWIRING
Verifythat the voltage, frequency,and phase correspondto 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
electricalsp ecifications.
Make all electrical connections in accordance with Natio nal
ElectricalCode(NEC) ANSI/NFPA 70--2008and any localcodes
orordinances that might apply.
FIREHAZARD
Failure to follow this warning could result in personal
injury,death,or property damage.
Do not connectaluminum wire between disconnectswitch
and furnace. Use only copper wire.
!WARNING
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 m eans of
electricald isconnect must be located within sig ht of the furnace.
NOTE: Proper polarity must be maintainedfor 115--vwiring. If
polarityis incorrect, controlLED statusindicatorlight will flash
rapidlyand furnace willNOT operate.
J--BOXRELOCATION
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, theJ--Box
shall not be relocatedto other side of furnace casing whenthe
ventpipe is routed within the casing.
1. Remove and save two screwsholding J--Box. (See Fig.
23.)
NOTE: TheJ--Boxcover need not be removed from the J--Box
in order to move the J--Box. Do NOT remove greenground
screw insideJ--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 tieon loop in furnace wiresattached to J--box.
3. Move J--Boxto desiredlocation.
4. Fasten J--Box to casing with two screws removed in Step
1.
5. Route J--Box wires within furn ace away from sharp edges,
rotating parts and hot surfaces.
ELECTRICALCONNECTION TO J--BOX
Field--Supplied Electrical Box on Furnace J--Box Bracket See
Fig.24.
1. Remove cover fromfurnace J--Box.
2. Attach electrical box to furnace J--Box bracket with at least
two field--suppliedscrews through holes in electricalbox
into holesin bracket. Use blunt--nosescrews that willnot
pierce wire insulation.
3. Route furnacepower wires through holes in electricalbox
and J--Box bracket, and make field--wire connections in
electricalbox. Use best practices(NEC in U.S.) for wire
bushings,strain relief,etc.
4. Route and securefield ground wire to greenground screw
onJ--Box bracket.
5. Connect line voltageleads as shown in Fig. 26.
6. Reinstallcover to J--Box. Do not pinch wires between
cover and bracket. Electrical Box on Furnace Casing Si de
SeeFig. 24.
FIREOR ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury,death,or property damage.
Iffield--suppliedmanualdisconnect switch isto be mounted
on furnace casing side, select a location where a drill or
fastenercannotdamage electricalor gas components.
!WARNING
1. Select and removea hole knockout in the casing where the
electricalb ox is to be installed.
NOTE: Ch eck that duct on side o f furnace will not interfere with
installedelectricalbox.
2. Remove the desiredelectricalbox hole knockout and posi-
tionthe hole in the electrical box over the hole in the fur-
nace casing.
3. Fasten the electrical box to casing by driving two field
supplied screws from inside electrical box into casing
steel.
4. Remove and save two screwsholding J--Box. (See Fig.
23.)
5. Pull furnacepower wires out of 1/2--in.(12 mm) diameter
hole in J--Box. Do not loosen wires from strain--relief
wire--tieon outside of J--Box.
6. Route furnacepower wires through holes in casing and
electricalbox and intoelectrical box.
7. Pull field powerwires into electricalbox.
8. Remove cover fromfurnace J--Box.
9. Route fieldground wire through holes in electricalbox
andcasing, and into furnaceJ--Box.
10. Reattach furnace J--Box to furnace casing with screws re-
movedinStep4.
11. Securefield ground wire to J--Boxgreen groundscrew.
310AAV