Do not connect aluminum wire between the disconnect switch
and the furnace. Use only copper wire.
Make all electrical connections in accordance with the National
Electric Code (NEC) ANSI/NFPA 70-1993 and any local codes or
ordinances that might apply.
For Canadian installations, all electrical connections must be made
in accordance with CSA C22.1 Canadian Electrical Code, or
authorities having jurisdiction.
Use a separate, fused branch electrical circuit containing a properly
sized fuse or HACR-type circuit breaker for this furnace. See
Table 4 for wire size and fuse specifications. A disconnecting
means must be located within sight of and readily accessible to the
furnace.
The cabinet MUST have an uninterrupted or unbroken ground
according to NEC, ANSI/ NFPA 70-1992, Canadian Electri-
cal Code, CSA C22.1, or local codes to minimize personal
injury if an electrical fault should occur. This ground may
consist of electrical wire or conduit approved for electrical
ground when installed in accordance with existing electrical
codes. Do not use gas piping as an electrical ground. Failure
to follow this warning could result in an electrical shock, fire,
or death.
If manual disconnect switch is to be mounted on the furnace,
select a location where a drill or fastener will not contact
electrical or gas components.
NOTE:
Proper polarity MUST be maintained for 115-v wiring. If
polarity is incorrect, the pilot flame will not be sensed and the
ignition control will shut down the unit until the control is reset.
24-V WIRING — Make field 24-v connections at the 24-v termi-
nal block. Connect Y terminal as shown in Fig. 4 for proper
cooling operation. The 24-v terminal board is marked for easy
connection of field wiring. (See Fig. 5.)
NOTE:
Use AWG No. 18 color-coded copper thermostat wire for
lengths up to 100 ft. For wire lengths over 100 ft, use AWG No.
16 wire.
ACCESSORIES — Install accessories per manufacturer’s instruc-
tions. Cycle test furnace and accessories twice to ensure proper
operation.
Step 7—Direct Venting
The 58EJB Furnace requires a dedicated (one 58EJB Furnace
only) direct vent system. In a direct vent system all air for
combustion is taken directly from the outside atmosphere and all
flue gases are discharged to the outside atmosphere.
Fig. 4—Heating and Cooling Application Wiring Diagram
A91338
1. Connect Y-terminal as shown for proper cooling operation.
2. If any of the original wire, as supplied, must be replaced,
use same type or equivalent wire.
3. Proper polarity must be maintained for 115-volt wiring.
NOTE :
115-VOLT
FIELD-SUPPLIED
FUSED DISCONNECT
24-VOLT
TERMINAL
BLOCK
TWO-WIRE
HEATING-
ONLY
FOUR
WIRE
THERMOSTAT
TERMINALS
FIELD-SUPPLIED
FUSED DISCONNECT
CONDENSING
UNIT
TWO
WIRE
W
Y
C
G
W
Y
R
GND
GND
FIELD 24-VOLT WIRING
FIELD 115-, 208/230-, 460-VOLT WIRING
FACTORY 24-VOLT WIRING
FACTORY 115-, 208/230-, 460-VOLT WIRING
208/230- OR
460-VOLT
THREE
PHASE
208/230-
VOLT
SINGLE
PHASE
G
R
GND
GND
GND
115-VOLT
SINGLE
PHASE
GND
Fig. 5—Control Board
A91333
W
Y
R
C
G
3
HUM-1
BLOWER OF DELAY SELF TEST
90 100 180 225
3-AMP FUSE
ELECTRONIC
AIR CLEANER
TERMINALS
(115 VAC, 1 AMP MAX)
HUMIDIFIER TERMINAL
(24 VAC, 0.5 AMP MAX)
JW9
SELF-TEST PINS
BLOWER OFF-DELAY
ADJUSTMENT CONTROL
24-VOLT THERMOSTAT
TERMINALS
EAC-2
EAC-1
5
