Carrier Weathermaster 48HJD Series Product Data

Also see for 48HJD005: Installation, Start-Up and Service Instructions

50ALTITUDE COMPENSATION* — 48HJ004-007*As the height above sea level increases, there is less oxygen per cubic foot of air.Therefore, the input rate should be reduced at higher altitudes.†Orifices are available through your local Carrier distributor.ALTITUDE COMPENSATION* — 48HJ008-014*As the height above sea level increases, there is less oxygen per cubic foot of air.Therefore, the input rate should be reduced at higher altitudes.†Orifices are available through your local Carrier distributor.ELEVATION(ft)72,000 AND 115,000 BTUHNOMINAL INPUT150,000 BTUHNOMINAL INPUTNatural GasOrifice Size† Liquid PropaneOrifice Size† Natural GasOrifice Size Liquid PropaneOrifice Size†0-2,000 33 43 30 382,000 34 43 30 393,000 35 44 31 404,000 36 44 32 415,000 36 44 33 426,000 37 45 34 437,000 37 45 35 438,000 38 46 36 449,000 39 47 37 4410,000 41 48 38 4511,000 43 48 39 4512,000 44 49 40 4613,000 44 49 41 4714,000 45 50 42 47ELEVATION(ft)125,000, 180,000, AND224,000 BTUHNOMINAL INPUT250,000 BTUHNOMINAL INPUTNatural GasOrifice Size† Liquid PropaneOrifice Size† Natural GasOrifice Size† Liquid PropaneOrifice Size†0-2,000 31 41 30 382,000 32 42 30 393,000 32 42 31 404,000 32 42 32 415,000 33 43 33 426,000 34 43 34 437,000 35 44 35 438,000 36 44 36 449,000 37 45 37 4410,000 38 46 38 4511,000 39 47 39 4512,000 40 47 40 4613,000 41 48 41 4714,000 42 48 42 47Performance data (cont)FLOW (cfm)0 0.1 0.2 0.3 0.4 0.5STATIC PRESSURE (in. wg)2 FANSOPERATING1 FANOPERATING250020001500100050005000400030002000100000 0.1 0.2 0.3 0.4 0.5STATIC PRESSURE (in. wg)FLOW (cfm) 2 FANSOPERATING1 FANOPERATING504030201000 0.25 0.5 0.75 1FLOW (CFM)STATIC PRESSURE (in. wg)3 TO 6 TON7 1/2 TO 12 1/2 TON0.250.200.150.100.050.001200 2000 2800 3600 4400FLOW (CFM)STATIC PRESSURE (in. wg)3 TO 6 TON7 1/2 TO 12 1/2 TON0.350.30ECONOMI$ER POWER EXHAUSTPERFORMANCE (48HJ004-007)ECONOMI$ER POWER EXHAUSTPERFORMANCE (48HJ008-014)ECONOMI$ER OUTDOOR-AIR LEAKAGE ECONOMI$ER RETURN-AIR PRESSURE DROPELEVATION MAXIMUM HEATING VALUE(Btu/ft 3)0-2000 11002001-3000 10503001-4000 10004001-5000 9505001-6000 900*Derating of the unit is not required unless the heating value of the gasexceeds the values listed in the table above, or if the elevation exceeds6000 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, thesame 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.ALTITUDE DERATING FACTOR* — 48HJ004-014