SERVICE AND TECHNICAL SUPPORT MANUAL
Gas Furnace: (F/G)9MAE
Specifications subject to change without notice.
440 04 4700 00
15
Table 5
Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate
TO BE USED WITH MODULATING FURNACES (F/G)9MAE0602120 FURNACE ONLY
AVG. GAS
SPECIFIC GRAVITY OF NATURAL GAS
HEAT VALUE
0.58
0.60
0.62
0.64
AT ALTITUDE
Orifice Mnfld Press Orifice Mnfld Press Orifice Mnfld Press Orifice Mnfld Press
(Btu/cu ft)
No.
Max/Min
No.
Max/Min
No.
Max/Min
No.
Max/Min
900
42
3.2 /0.50
42
3.3 /0.50
42
3.4 /0.55
42
3.5 /0.55
0
925
43
3.7 /0.55
43
3.8 /0.60
42
3.2 /0.50
42
3.3 /0.50
(0)
950
43
3.5 /0.55
43
3.6 /0.55
43
3.7 /0.60
43
3.8 /0.60
975
44
3.8 /0.60
43
3.4 /0.55
43
3.5 /0.55
43
3.6 /0.55
to
1000
44
3.6 /0.55
44
3.7 /0.60
44
3.8 /0.60
43
3.5 /0.55
1025
44
3.4 /0.55
44
3.5 /0.55
44
3.6 /0.55
44
3.8 /0.60
2000
1050
44
3.3 /0.50
44
3.4 /0.55
44
3.5 /0.55
44
3.6 /0.55
(610)
1075
45
3.8 /0.60
44
3.2 /0.50
44
3.3 /0.50
44
3.4 /0.55
1100
46
3.8 /0.60
45
3.7 /0.60
44
3.2 /0.50
44
3.3 /0.50
U.S.A.
800
42
3.4 /0.55
42
3.5 /0.55
42
3.7 /0.55
42
3.8 /0.60
2001 (611)
825
42
3.2 /0.50
42
3.3 /0.50
42
3.4 /0.55
42
3.6 /0.55
to
850
43
3.7 /0.60
43
3.8 /0.60
42
3.2 /0.50
42
3.3 /0.55
3000 (914)
875
43
3.5 /0.55
43
3.6 /0.55
43
3.7 /0.60
43
3.8 /0.60
900
44
3.8 /0.60
43
3.4 /0.55
43
3.5 /0.55
43
3.6 /0.55
Canada
925
44
3.6 /0.55
44
3.7 /0.60
44
3.8 /0.60
43
3.4 /0.55
2001 (611)
950
44
3.4 /0.55
44
3.5 /0.55
44
3.6 /0.55
44
3.7 /0.60
to
975
44
3.2 /0.50
44
3.3 /0.50
44
3.4 /0.55
44
3.6 /0.55
4500 (1372)
1000
45
3.7 /0.60
44
3.2 /0.50
44
3.3 /0.50
44
3.4 /0.55
775
42
3.4 /0.55
42
3.5 /0.55
42
3.6 /0.55
42
3.7 /0.60
3001
800
42
3.2 /0.50
42
3.3 /0.50
42
3.4 /0.55
42
3.5 /0.55
(915)
825
43
3.6 /0.55
43
3.7 /0.60
42
3.2 /0.50
42
3.3 /0.50
850
43
3.4 /0.55
43
3.5 /0.55
43
3.6 /0.55
43
3.8 /0.60
875
44
3.7 /0.60
44
3.8 /0.60
43
3.4 /0.55
43
3.6 /0.55
4000
900
44
3.5 /0.55
44
3.6 /0.55
44
3.7 /0.60
43
3.4 /0.55
(1219)
925
44
3.3 /0.50
44
3.4 /0.55
44
3.5 /0.55
44
3.6 /0.55
950
45
3.8 /0.60
44
3.2 /0.50
44
3.4 /0.55
44
3.5 /0.55
750
42
3.3 /0.50
42
3.4 /0.55
42
3.6 /0.55
42
3.7 /0.55
4001
775
43
3.8 /0.60
42
3.2 /0.50
42
3.3 /0.50
42
3.4 /0.55
(1220)
800
43
3.6 /0.55
43
3.7 /0.60
43
3.8 /0.60
42
3.2 /0.50
825
44
3.8 /0.60
43
3.5 /0.55
43
3.6 /0.55
43
3.7 /0.60
850
44
3.6 /0.55
44
3.7 /0.60
43
3.4 /0.55
43
3.5 /0.55
5000
875
44
3.4 /0.55
44
3.5 /0.55
44
3.6 /0.55
44
3.8 /0.60
(1524)
900
44
3.2 /0.50
44
3.3 /0.50
44
3.4 /0.55
44
3.6 /0.55
925
45
3.7 /0.60
44
3.2 /0.50
44
3.3 /0.50
44
3.4 /0.55
725
42
3.3 /0.50
42
3.4 /0.55
42
3.5 /0.55
42
3.6 /0.55
5001
750
43
3.7 /0.60
42
3.2 /0.50
42
3.3 /0.50
42
3.4 /0.55
(1525)
775
43
3.5 /0.55
43
3.6 /0.55
43
3.7 /0.60
42
3.2 /0.50
800
44
3.8 /0.60
43
3.4 /0.55
43
3.5 /0.55
43
3.6 /0.55
825
44
3.5 /0.55
44
3.7 /0.55
44
3.8 /0.60
43
3.4 /0.55
6000
850
44
3.3 /0.50
44
3.4 /0.55
44
3.6 /0.55
44
3.7 /0.60
(1829)
875
45
3.8 /0.60
44
3.3 /0.50
44
3.4 /0.55
44
3.5 /0.55
900
46
3.8 /0.60
45
3.7 /0.60
44
3.2 /0.50
44
3.3 /0.50
675
42
3.5 /0.55
42
3.6 /0.55
42
3.7 /0.60
42
3.8 /0.60
6001
700
42
3.2 /0.50
42
3.3 /0.50
42
3.5 /0.55
42
3.6 /0.55
(1830)
725
43
3.7 /0.60
43
3.8 /0.60
42
3.2 /0.50
42
3.3 /0.50
750
43
3.4 /0.55
43
3.5 /0.55
43
3.7 /0.55
43
3.8 /0.60
775
44
3.7 /0.60
44
3.8 /0.60
43
3.4 /0.55
43
3.5 /0.55
7000
800
44
3.5 /0.55
44
3.6 /0.55
44
3.7 /0.60
44
3.8 /0.60
(2133)
825
44
3.2 /0.50
44
3.4 /0.55
44
3.5 /0.55
44
3.6 /0.55
850
45
3.7 /0.60
44
3.2 /0.50
44
3.3 /0.50
44
3.4 /0.55
U.
S
.A.
On
ly
to
U.
S
.A.
On
ly
to
ft (m)
U
.S
.A
.
an
d
C
an
ad
a
U
.S
.A
.
an
d
C
an
ad
a
U.
S
.A.
On
ly
to
U.
S
.A.
On
ly
to
(TABULATED DATA BASED ON 20,200 BTUH MAX-HEAT / 8,000 BTUH MIN-HEAT PER BURNER,
DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL)
ALTITUDE
RANGE
L11F100A
