Installation guide

Table6--Electrical Data
FURNACE SIZE
VOLTS-
HERTZ-
PHASE
OPERATING VOLTAGE
RANGE
MAXIMUM
UNIT AMPS
Maximum* Minimum*
127 104
127 104
127 104
127 104
127 104
127 104
127 104
127 104
127 104
127 104
127 104
127 104
127 104
127 104
UNiT
AMPACITY#
045=08/024045 115-60-1 5.2 7.26
045=12/036045 115-60-1 7.2 9.79
070=08/024070 115-60-1 5.1 7.14
070=12/036070 115-60-1 7.2 9.72
070=16/048070 115-60-1 9.5 12.60
090=14/042090 115-60-1 8.6 11.39
090=16/048090 115-60-1 10.0 13.09
090 = 20/060090 115-60-1 14.1 18.2
110=12/036110 115-60-1 8.6 11.27
110=16/048110 115-60-1 10.2 13.34
110=22/066110 115-60-1 15.1 19.42
135=16/048135 115-60-1 10.5 13.63
135=22/066135 115-60-1 14.5 18.72
155=20/060155 115-60-1 15.4 19.83
MAXIMUM
WiRE
LENGTH FT.
(M)$
49 (14.9)
37 (11.2)
51 (15.5)
38 (11.5)
29 (8.8)
32 (9.7)
28 (8.5)
31 (9.4)
32 (9.7)
27 (8.2)
29 (8.8)
27 (8.2)
30 (9.1)
29 (8.8)
Permissible limits of the voltage range at which the unit operates satisfactorily.
MAXIMUM
FUSE OR MINIMUM
CKT BKR WIRE
AMPSI" GAUGE
15 14
15 14
15 14
15 14
15 14
15 14
15 14
20 12
15 14
15 14
20 12
15 14
20 12
20 12
# 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.
1-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.
12. Complete electrical box wiring and installation. Connect
line voltage leads as shown in Fig. 26. Use best practices
(NEC) for wire bushings, strain relief, etc.
13. 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 6. Refer to power cord
manufacturer's listings.
1. Remove cover from J-Box.
2. Route listed power cord through 7/8-in. (22 ram) 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. 26.
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 (22 ram) 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.
22