| PERFORMANCE DATA (cont) |
ALTITUDE COMPENSATION* | ALTITUDE COMPENSATION* |
| 72,000 AND 115,000/ |
|
| ||
| 60,000 and 90,000 | 150,000/120,000 BTUH | |||
ELEVATIO | BTUH NOMINAL | NOMINAL INPUT | |||
INPUT* |
|
| |||
N |
|
| |||
(ft) | Natural | Liquid | Natural | Liquid | |
Gas | Propane | Gas | Propane | ||
| |||||
| Orifice | Orifice | Orifice | Orifice | |
| Size† | Size† | Size† | Size† | |
33/38 | 43/45 | 30/32 | 38/42 | ||
2,000 | 34/39 | 43/46 | 30/33 | 39/42 | |
3,000 | 35/40 | 44/47 | 31/34 | 40/43 | |
4,000 | 36/41 | 44/47 | 32/35 | 41/43 | |
5,000 | 36/41 | 44/48 | 33/35 | 42/43 | |
6,000 | 37/42 | 45/48 | 34/36 | 43/44 | |
7,000 | 37/42 | 45/49 | 35/37 | 43/44 | |
8,000 | 38/43 | 46/49 | 36/37 | 44/45 | |
9,000 | 39/43 | 47/50 | 37/38 | 44/46 | |
10,000 | 41/44 | 48/50 | 38/40 | 45/47 | |
11,000 | 43/45 | 48/51 | 39/41 | 45/48 | |
12,000 | 44/45 | 49/51 | 40/42 | 46/49 | |
13,000 | 44/46 | 49/52 | 41/43 | 47/49 | |
14,000 | 45/47 | 50/52 | 42/43 | 47/50 |
*As the height above sea level increases, there is less oxygen per cubic foot of air. Therefore, heat input rate should be reduced at higher altitudes.
†Orifices available through your Bryant distributor.
| 250,000 BTUH | |||
ELEVATION | NOMINAL INPUT | NOMINAL INPUT | ||
Natural | Liquid | Natural | Liquid | |
(ft) | Gas | Propane | Gas | Propane |
| Orifice | Orifice | Orifice | Orifice |
| Size† | Size† | Size† | Size† |
31 | 41 | 30 | 38 | |
2,000 | 32 | 42 | 30 | 39 |
3,000 | 32 | 42 | 31 | 40 |
4,000 | 32 | 42 | 32 | 41 |
5,000 | 33 | 43 | 33 | 42 |
6,000 | 34 | 43 | 34 | 43 |
7,000 | 35 | 44 | 35 | 43 |
8,000 | 36 | 44 | 36 | 44 |
9,000 | 37 | 45 | 37 | 44 |
10,000 | 38 | 46 | 38 | 45 |
11,000 | 39 | 47 | 39 | 45 |
12,000 | 40 | 47 | 40 | 46 |
13,000 | 41 | 48 | 41 | 47 |
14,000 | 42 | 48 | 42 | 47 |
*As the height above sea level increases, there is less oxygen per cubic foot of air. Therefore, heat input rate should be reduced at higher altitudes.
†Orifices available through your local Bryant distributor.
ALTITUDE DERATING FACTOR*
ELEVATION | MAXIMUM HEATING VALUE | |
(Btu/ft3) | ||
| ||
1100 | ||
1050 | ||
1000 | ||
950 | ||
900 |
*Derating of the unit is not required unless the heating value of the gas exceeds the values listed in the table above, or if the elevation exceeds 6000 ft. Derating conditions must be 4% per thousand ft above sea level. For example, at 4000 ft, if the heating value of the gas exceeds 1000 Btu/ft3, the unit will require a 16% derating. For elevations above 6000 ft, the same formula applies. For example, at 7000 ft, the unit will require a 28% derating of the maximum heating value per the National Fuel Gas Code.
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