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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.
16
A190079
Fig. 25 – Field Wiring Diagram
Electrical Connection to J-Box
Electrical Box on Furnace Casing Side
A190278
Fig. 26 – Field-Supplied Electrical Box on Furnace Casing
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 position the
hole in the electrical box over the hole in the furnace 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 screws holding J-Box, see
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.Remove cover from
furnace J-Box.
8. Route field ground wire through holes in electrical box and casing,
and into furnace J-Box.
9. Reattach furnace J-Box to furnace casing with screws removed in
Step 4.
10. Secure field ground wire to J-Box green ground screw.
11. Complete electrical box wiring and installation. Connect line
voltage leads, see
. Use best practices (NEC in U.S. for wire
bushings, strain relief, etc.
12. Reinstall cover to J-Box. Do not pinch wires between cover and
bracket.
115-V FIELD-
SUPPLIED
DISCONNECT
AUXILIARY
J-BOX
24-V
TERMINAL
BLOCK
THREE-WIRE
HEATING-ONLY
FIVE WIRE
NOTE 1
NOTE 2
FIELD-SUPPLIED
DISCONNECT
CONDENSING
UNIT
TWO
WIRE
FURNACE
C
O
N
T
R
O
L
R
G
COM
W
C
R
G
Y
GND
GND
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
208/230- OR
460-V
THREE
PHASE
208/230-V
SINGLE
PHASE
BLOWER DOOR SWITCH
WHT
BLK
WHT
BLK
NOTES:
Connect Y-terminal in furnace as shown for proper blower operation.
Some thermostats require a "C" terminal connection as shown.
If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
W
Y
GND
THERMOSTAT
TERMINALS
1.
2.
3.
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.
GROUND
NEUTRAL
LINE VOLTAGE
Table 5 – Electrical Data
FURNACE SIZE
VOLTS - HERTZ
- PHASE
OPERATING VOLTAGE RANGE
*
*. Permissible limits of the voltage range at which the unit operates satisfactorily.
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.
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.
MIN. WIRE
GAUGE
Max.
Min.
045V14--12
115-60-1
127
104
10.7
34 (10.6)
15
14
045V17--16
115-60-1
127
104
10.7
34 (10.6)
15
14
070V17--16
115-60-1
127
104
14.3
25 (7.9)
15
14
070V21--20
115-60-1
127
104
17.3
33 (10.1)
20
12
090V21--20
115-60-1
127
104
14.6
25 (7.7)
15
14
090V24--20
115-60-1
127
104
14.6
25 (7.7)
15
14
110V24--22
115-60-1
127
104
18.1
31 (9.7)
20
12