23
TABLE 7—ELECTRICAL DATA
FURNACE
SIZE
VOLTS---
HERTZ---
PHASE
OPERATING VOLTAGE
RANGE
MAXIMUM
UNIT
AMPS
UNIT
AMPACITY#
MAXIMUM
WIRE
LENGTH
(FT.)‡
MAXIMUM
FUSE OR
CKT BKR
AMPS†
MINIMUM
WIRE
GAUGE
Maximum
*
Minimum*
045---08/024045
115---60---1
127
104
5.4
7.54
49
15
14
045---12/036045
115---60---1
127
104
7.0
9.50
39
15
14
070---08/024070
115---60---1
127
104
5.0
7.06
52
15
14
070---12/036070
115---60---1
127
104
6.8
9.22
40
15
14
070---16/048070
115---60---1
127
104
9.5
12.60
29
15
14
090---14/042090
115---60---1
127
104
8.2
10.83
34
15
14
090---16/048090
115---60---1
127
104
10.0
13.13
28
15
14
090---20/060090
115---60---1
127
104
13.6
17.61
32
20
12
110---12/036110
115---60---1
127
104
8.2
10.75
34
15
14
110---16/048110
115---60---1
127
104
10.1
13.12
28
15
14
110---22/066110
115---60---1
127
104
14.8
18.99
30
20
12
135---16/048135
115---60---1
127
104
10.2
13.27
27
15
14
135---22/066135
115---60---1
127
104
14.4
18.55
30
20
12
155---20/060155
115---60---1
127
104
15.0
19.33
29
20
12
* Permissible limits of the voltage range at which the unit operates satisfactorily.
# 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.
{
Time---delay type is recommended.
}
Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.
NOTE
: Check that duct on side of furnace will not interfere with
installed electrical box.
4. Remove the desired electrical box hole knockout and posi-
tion the hole in the electrical box over the hole in the fur-
nace casing.
5. Fasten the electrical box to casing by driving two field
supplied screws from inside electrical box into casing
steel.
6. Remove and save two screws holding J--Box. (See Fig.
23.)
7. Pull furnace power wires out of 1/2--inch diameter hole in
J--Box. Do not loosen wires from strain--relief wire--tie on
outside of J--Box.
8. Route furnace power wires through holes in casing and
electrical box and into electrical box.
9. Pull field power wires into electrical box.
10. Remove cover from furnace J--Box.
11. Route and secure field ground wire to green ground screw
on J--Box bracket.
12. Connect line voltage leads as shown in Fig. 26.
13. Reinstall cover to J--Box. Do not pinch wires between
cover and bracket. Electrical Box on Furnace Casing Side
See Fig. 24.
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.
!
WARNING
1. Select and remove a hole knockout in the casing where the
electrical box is to be installed.
2. Route field ground wire through holes in electrical box
and casing, and into furnace J--Box.
3. Reattach furnace J--Box to furnace casing with screws re-
moved in Step 4.
4. Secure field ground wire to J--Box green ground screw.
5. Complete electrical box wiring and installation. Connect
line voltage leads as shown in Fig. 26. Use best practices
(NEC in U.S. and CSA C22.1 in Canada) for wire bush-
ings, strain relief, etc.
6. Reinstall cover to J--Box. Do not pinch wires between
cover and bracket.
POWER CORD INSTALLATION IN FURNACE J--BOX
NOTE
: Power cords must be able to handle the electrical
requirements listed in Table 5. Refer to power cord
manufacturer’s listings.
1. Remove cover from J--Box.
2. Route listed power cord through 7/8--in. 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 as shown in Fig. 25.
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--inch diameter hole in J--Box.
3. Secure BX cable to J--Box bracket with connectors ap-
proved for the type of cable used.
4. Secure field ground wire to green ground screw on J--Box
bracket.
5. Connect line voltage leads as shown in Fig. 26.
6. Reinstall cover to J--Box. Do not pinch wires between
cover and bracket.
PG
8J
/M
Содержание PG8J
Страница 36: ...36 A08411 Fig 46 Wiring Diagram PG8J M ...
