22
Table 7 – Electrical data
FURNACE SIZE
VOLTS---
HERTZ---
PHASE
OPERATING VOLTAGE
RANGE
MAXIMUM
UNIT
AMPS
UNIT
AMPACITY#
MAXIMUM
WIRE
LENGTH
FT. (M)‡
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)
15
14
045---12/036045
115---60---1
127
104
7.0
9.50
39 (12)
15
14
070---08/024070
115---60---1
127
104
5.0
7.06
52 (16)
15
14
070---12/036070
115---60---1
127
104
6.8
9.22
40 (12)
15
14
070---16/048070
115---60---1
127
104
9.5
12.60
29 (9)
15
14
090---14/042090
115---60---1
127
104
8.2
10.83
34 (10)
15
14
090---16/048090
115---60---1
127
104
10.0
13.13
28 (9)
15
14
090---20/060090
115---60---1
127
104
13.6
17.61
32 (8)
20
12
110---12/036110
115---60---1
127
104
8.2
10.75
34 (10)
15
14
110---16/048110
115---60---1
127
104
10.1
13.12
28 (9)
15
14
110---22/066110
115---60---1
127
104
14.8
18.99
30 (9)
20
12
135---16/048135
115---60---1
127
104
10.2
13.27
27 (8)
15
14
135---22/066135
115---60---1
127
104
14.4
18.55
30 (9)
20
12
155---20/060155
115---60---1
127
104
15.0
19.33
29 (9)
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.
UNION
SEDIMENT
TRAP
MANUAL
SHUTOFF
VALVE
(REQUIRED)
GAS
SUPPLY
A02035
Fig. 22 -- Typical Gas Pipe Arrangement
ELECTRICAL CONNECTIONS
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death
.
Blower access panel door switch opens 115--v power to
control. No component operation can occur. Do not bypass
or close switch with panel removed.
!
WARNING
See Fig. 25 for field wiring diagram showing typical field 115--v
wiring. Check all factory and field electrical connections for
tightness.
Field--supplied wiring shall conform with the limitations of 63
_
F
(35
_
C) rise.
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
The cabinet MUST have an uninterrupted or unbroken
ground according to NEC ANSI/NFPA 70--2008 and
Canadian Electrical Code CSA C22.1 or local codes to
minimize personal injury if an electrical fault should occur.
This may consist of electrical wire, conduit approved for
electrical ground or a listed, grounded power cord (where
permitted by local code) when installed in accordance with
existing electrical codes. Refer to the power cord
manufacturer’s ratings for proper wire gauge. Do not use
gas piping as an electrical ground.
!
WARNING
FURNACE MAY NOT OPERATE
Failure to follow this caution may result in intermittent
furnace operation.
Furnace control must be grounded for proper operation or
else control will lock out. Control must remain grounded
through green/yellow wire routed to gas valve and manifold
bracket screw.
CAUTION
!
115--V WIRING
Verify that the voltage, frequency, and phase correspond to that
specified on unit rating plate. Also, check to be sure that service
provided by utility is sufficient to handle load imposed by this
equipment. Refer to rating plate or Table 7 for equipment
electrical specifications.
Make all electrical connections in accordance with National
Electrical Code (NEC) ANSI/NFPA 70--2008 and any local codes
or ordinances that might apply.
58D
L
