Carrier 59TN6A - Page 71

Table 19 - Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Continued)
TWO-STAGE FURNACE
(TABULATED DATA BASED ON 20,000 BTUH HIGH-HEAT/13,000 BTUH LOW-HEAT PER BURNER,
DERATED 2°/o/1000 FT (305M) ABOVE SEA LEVEL)
ALTITUDE AVG. GAS
RANGE HEAT VALUE 0.58
AT ALTITUDE Orifice Mnfld Press
ft (m) _ No__ ,,,,,,_h/Low
650
7001 675
--_ (2134) 700
O 725
<' to
750
8000 775
(2438) 800
825
625
8001 650
c (2439) 675
O
<.' to 700
725
9000 750
__ 775
9001 600
--_ (2744) 625
O 650
<' to 675
10000 700
* Orifice numbers shown in BOLD are factory-installed.
SPECIFIC GRAVITY OF NATURAL GAS
0.60 0.62
Orifice Mnfld Press Orifice Mnfld Press
No. Hi,h/Low No. Hi,h/Low
42 3.4 / 1.4 42 3.5 / 1.5 42 3.6 / 1.5
43 3.8 / 1.6 42 3.2 / 1.4 42 3.3 / 1.4
43 3.5 / 1.5 43 3.7 / 1.5 43 3.8 / 1.6
44 3.8 / 1.6 43 3.4 / 1.4 43 3.5 / 1.5
44 3.5 / 1.5 44 3.7 / 1.5 44 3.8 / 1.6
44 3.3 / 1.4 44 3.4 / 1.4 44 3.5 / 1.5
45 3.8 / 1.6 44 3.2 / 1.4 44 3.3 / 1.4
46 3.7 / 1.6 46 3.8 / 1.6 45 3.8 / 1.6
42 3.4 / 1.4 42 3.5 / 1.5 42 3.6 / 1.5
43 3.8 / 1.6 42 3.2 / 1.4 42 3.3 / 1.4
43 3.5 / 1.5 43 3.6 / 1.5 43 3.7 / 1.6
44 3.7 / 1.6 43 3.4 / 1.4 43 3.5 / 1.5
44 3.5 / 1.5 44 3.6 / 1.5 44 3.7 / 1.6
44 3.3 / 1.4 44 3.4 / 1.4 44 3.5 / 1.5
45 3.7 / 1.6 44 3.2 / 1.3 44 3.3 / 1.4
42 3.3 / 1.4 42 3.4 / 1.5 42 3.6 / 1.5
43 3.7 / 1.6 42 3.2 / 1.3 42 3.3 / 1.4
43 3.5 / 1.5 43 3.6 / 1.5 43 3.7 / 1.6
44 3.7 / 1.6 44 3.8 / 1.6 43 3.4 / 1.4
44 3.4 / 1.4 44 3.5 / 1.5 44 3.7 / 1.5
3.4 / 1.4
0,64
Orifice Mnfld Press
No. Hi2h/Low
42 3.7 / 1.6
42 3.4 / 1.5
42 3.2 / 1.4
43 3.6 / 1.5
43 3.4 / 1.4
44 3,7 / 1.5
44 3,4 / 1.4
44 3.2 / 1,4
42 3.7 / 1.6
42 3.4 / 1.4
42 3.2 / 1.3
43 3.6 / 1.5
44 3,8 / 1.6
44 3,6 / 1.5
44 3,4 / 1.4
42 3.7 / 1.6
42 3.4 / 1.4
43 3.8 / 1.6
43 3.5 / 1.5
44 3,8 / 1.6
44 3,5 / 1.5
Al1252B
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