58SP0A/58SP1A: 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.
17
Power Cord Installation in Furnace J-Box
NOTE:
Power cords must be able to handle the electrical requirements
. Refer to power cord manufacturer’s listings.
1. Remove cover from J-Box.
2. Route listed power cord through 7/8-in. (22 mm) diameter hole in
J-Box.
3. Secure power cord to J-Box bracket with a strain relief bushing or a
connector approved for the type of cord used.
4. Secure field ground wire to green ground screw on J-Box bracket.
5. Connect line voltage leads, see
.
6. Reinstall cover to J-Box. Do not pinch wires between cover and
bracket.
BX Cable Installation in Furnace J-Box
1. Remove cover from J-Box.
2. Route BX cable into 7/8-in. (22 mm) diameter hole in J-Box.
3. Secure BX cable to J-Box bracket with connectors approved for the
type of cable used.
4. Secure field ground wire to green ground screw on J-Box bracket.
5. Connect line voltage leads, see
.
6. Reinstall cover to J-Box. Do not pinch wires between cover and
bracket.
24-V Wiring
Make field 24-v connections at the 24-v terminal strip, see
. Connect terminal Y/Y2 as shown in
for proper cooling
operation. Use only AWG No. 18, color-coded, copper thermostat wire.
The 24-v circuit contains an automotive-type, 3-amp. fuse located on the
control. Any direct shorts during installation, service, or maintenance
could cause this fuse to blow. If fuse replacement is required, use ONLY
a 3-amp. fuse of identical size.
ACCESSORIES
1. Electronic Air Cleaner (EAC)
Connect an accessory Electronic Air Cleaner (if used) using 1/4-in
female quick connect terminals to the two male 1/4-in
quick-connect terminals on the control board marked EAC-1 and
EAC-2. The terminals are rated for 115VAC, 1.0 amps maximum
and are energized during blower motor operation, see
.
2. Humidifier (HUM)
Connect an accessory 24 VAC, 0.5 amp. maximum humidifier (if
used) to the 1/4-in male quick-connect HUM terminal and
COM-24V screw terminal on the control board thermostat strip.
The HUM terminal is energized when blower is energized in
heating, see
NOTE:
DO NOT connect furnace control HUM terminal to HUM
(humidifier) terminal on Thermidistat
©
, Zone Controller or similar
device. See Thermidistat, Zone Controller, thermostat, or controller
manufacturer’s instructions for proper connection.
A190207
Fig. 27 – Variable Speed ECM Blower Motor
24-V THERMOSTAT
TERMINALS
PL2 – (115VAC) HOT SURFACE
IGNITER SIGNAL & INDUCER
MOTOR CONNECTOR
115-VAC (L2) NEUTRAL
CONNECTIONS
115-VAC (L1) LINE
VOLTAGE CONNECTIONS
EAC-1 TERMINAL
(115-VAC 1.0 AMP MAX.)
PL1 – LOW
VOLTAGE MAIN
HARNESS
CONNECTOR
TRANSFORMER 24-VAC
CONNECTIONS
3-AMP FUSE
STATUS AND COMM
LED LIGHTS
SW1 SETUP
SWITCHES AND
BLOWER OFF-
DELAY
MODEL PLUG
CONNECTOR
SW2 AIR CONDITIONING
(AC) AIRFLOW SETUP
SWITCHES (6, 7, 8)
COMMUNICATION
CONNECTOR
(WHEN USED)
SW2 CONTINUOUS FAN (CF)
AIRFLOW SETUP SWITCHES (3, 4, 5)
HUMIDIFIER
TERMINAL (24-VAC
0.5 AMP MAX.
ACRDJ – AIR
CONDITIONING
RELAY DISABLE
JUMPER
FLASH
UPGRADE
CONNECTOR
(FACTORY
ONLY)
BOARD PART
NUMBER LOCATION
IND