16
Table 6
Table 6. Voltage specifications & thermostat Wire Gauge
FuRnacE
MoDEl
nuMBER-
FuRnacE
InPut
(BtuH)
caBInEt
WIDtH
(IN.)
NOMINAL
ElEctRIcal
suPPlY
MaXIMuM
oPERatInG
VoltaGE
MInIMuM
oPERatInG
VoltaGE
MaXIMuM
FuRnacE
aMPEREs
MInIMuM
WIRE
GauGE
MaXIMuM
FusE oR cIRcuIt
BREaKER aMPs*
MInIMuM
cIRcuIt
aMPacItY
1
MaXIMuM
oVERcuRREnt
PRotEctIon
2
M1MB 056
56,000
19 3/4
115-1-60
103
127
7.0
14
15
8.5
14.5
M1MB 070
70,000
19 3/4
115-1-60
103
127
7.0
14
15
8.5
14.5
M1MB 077
77,000
19 3/4
115-1-60
103
127
7.0
14
15
8.5
14.5
M1MB 090
90,000
19 3/4
115-1-60
103
127
7.0
14
15
8.5
14.5
M1BB 066
66,000
19 3/4
115-1-60
103
127
6.8
14
15
8.3
14.3
M1BB 086
86,000
19 3/4
115-1-60
103
127
6.8
14
15
8.3
14.3
M1MC 056
56,000
19 3/4
115-1-60
103
127
8.9
14
20
10.9
18.8
M1MC 070
70,000
19 3/4
115-1-60
103
127
8.9
14
20
10.9
18.8
M1MC 077
77,000
19 3/4
115-1-60
103
127
8.9
14
20
10.9
18.8
M1MC 090
90,000
19 3/4
115-1-60
103
127
8.9
14
20
10.9
18.8
M1BC 066
66,000
19 3/4
115-1-60
103
127
8.7
14
20
10.7
18.6
M1BC 086
86,000
19 3/4
115-1-60
103
127
8.7
14
20
10.7
18.6
notE:
Minimum wire gauge and maximum fuse/circuit breaker amperage are based on MCA
1
and MOP
2
calculations. This furnace is approved
for installation with a 15 or 20 amp fuse/circuit breaker however wiring sizing must adhere to current version of the NEC and/or applicable local
codes depending upon the overcurrent protection.
tHERMostat WIRE GauGE
REcoMMEnDED tHERMostat WIRE lEnGtH
2 - WIRE - HEatInG
4 oR 5 WIRE - coolInG
24
55 ft.
25 ft.
22
90 ft.
45 ft.
20
140 ft.
70 ft.
18
225 ft.
110 ft.
* Time-delay fuses or circuit breakers are required.
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