78
Table 22 -- Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Continued)
To Be Used with Modulating Furnaces 59MN7A060V21--20 Only
S
A
G
L
A
R
U
T
A
N
F
O
Y
T
I
V
A
R
G
C
I
F
I
C
E
P
S
S
A
G
.
G
V
A
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
ft (m)
(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
650
42
3.4 /0.55
42
3.6 /0.55
42
3.7 /0.60
42
3.8 /0.60
7001
675
42
3.2 /0.50
42
3.3 /0.50
42
3.4 /0.55
42
3.5 /0.55
(2134)
700
43
3.6 /0.55
43
3.7 /0.60
42
3.2 /0.50
42
3.3 /0.50
725
43
3.4 /0.55
43
3.5 /0.55
43
3.6 /0.55
43
3.7 /0.60
750
44
3.6 /0.55
44
3.7 /0.60
43
3.4 /0.55
43
3.5 /0.55
8000
775
44
3.4 /0.55
44
3.5 /0.55
44
3.6 /0.55
44
3.7 /0.60
(2438)
800
44
3.2 /0.50
44
3.3 /0.50
44
3.4 /0.55
44
3.5 /0.55
825
46
3.8 /0.60
45
3.7 /0.60
44
3.2 /0.50
44
3.3 /0.50
625
42
3.4 /0.55
42
3.5 /0.55
42
3.7 /0.55
42
3.8 /0.60
8001
650
42
3.2 /0.50
42
3.3 /0.50
42
3.4 /0.55
42
3.5 /0.55
(2439)
675
43
3.6 /0.55
43
3.7 /0.60
43
3.8 /0.60
42
3.2 /0.50
700
44
3.8 /0.60
43
3.4 /0.55
43
3.6 /0.55
43
3.7 /0.55
725
44
3.6 /0.55
44
3.7 /0.60
44
3.8 /0.60
43
3.4 /0.55
9000
750
44
3.3 /0.50
44
3.4 /0.55
44
3.5 /0.55
44
3.7 /0.55
(2743)
775
45
3.8 /0.60
44
3.2 /0.50
44
3.3 /0.50
44
3.4 /0.55
9001
600
42
3.4 /0.55
42
3.5 /0.55
42
3.6 /0.55
42
3.8 /0.60
(2744)
625
43
3.8 /0.60
42
3.2 /0.50
42
3.3 /0.55
42
3.5 /0.55
650
43
3.5 /0.55
43
3.6 /0.55
43
3.8 /0.60
42
3.2 /0.50
675
44
3.8 /0.60
43
3.4 /0.55
43
3.5 /0.55
43
3.6 /0.55
10000
700
44
3.5 /0.55
44
3.6 /0.55
44
3.7 /0.60
44
3.8 /0.60
(3048)
725
44
3.3 /0.50
44
3.4 /0.55
44
3.5 /0.55
44
3.6 /0.55
* Orifice numbers shown in
BOLD
are factory-installed.
U.
S
.A.
On
ly
to
U.
S
.A.
On
ly
to
U.
S
.A.
On
ly
to
A11621B
59MN
7A
