Carrier 58HDX - Page 36

Table 6 — Natural Gas Manifold Pressure (in we) 20,000 BTU per Burner*
MEAN ELEVATION FEET ABOVE SEA LEVEL Ft. (M)
0 to 2000 2001 to 3000T 3001 to 4000 4001 to 5000 5001 to 6000 6001 to 7000 7001 to 8000
(1219.1 to (1524.1 to (1829.1 to (2134.1 to
VALUE (0 to 610) (610.1 to 914)t | (914.1 to 1219) 1524) 1829) 2134) 2438)
BTU/CU.
FT. Orifice Mnfle Orifice Mnfle Orifice Mnfle Orifice Mnfic Orifice Mnfic Orifice Mnfle Orifice Mnfic
Press ress ress Press ress ress Press
HEATING
700 44 3.7
725 : 44 3.4
750 . 44 3.2
775 3.5 . 44 3.0
800 44 3.6 3.3 . 44 2.8
825 44 3.7 44 3.4 3.1 : 44 2.6
850 44 3.5 44 3.2 2.9 : 44 2.5
875 44 3.5 44 3.3 44 3.0 2.8 . 47 3.4
900 44 3.3 44 3.1 44 2.8 2.6 . 48 3.6
925 44 3.7 44 3.2 44 2.9 44 2.7 2.5 . 48 3.4
950 44 3.5 44 3.0 44 2.8 44 2.6 3.4 . 48 3.3
975 44 3.3 44 2.8 44 2.6 47 3.5 3.7 . 49 3.6
1000 44 3.2 44 2.7 44 2.5 47 3.3 3.5 . 49 3.4
1050 44 2.9 44 2.5 48 3.7 48 3.4 3.7 -- --
1100 46 3.3 48 3.7 48 3.4 49 3.7 -- -- --
* When installing the 100,000 BTU furnace in downflow or horizontal positions, firing rate is reduced to 19,500 BTU/cell. Subtract 0.2” w.c
from the manifold pressures listed in table above for the correct manifold pressure.
Conversion: 1 in we = 249 Pa
Bold-— indicates factory orifice size.
NOTE: Natural gas data is based on 0.60 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI 2223.1 -—2006/NFPA
54-2006 or National Standard of Canada, Natural Gas And Propane Installation Code CSA B149.1-05.
In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design—certified by CSA.
Tin Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (609.6 to 1371.6m) above sea level. Use
the 2001 to 3000 (609.9 to 914.4m) column in Tables 6 and 7.
Table 7 - LPG or Propane Gas Manifold Pressure (in we)*
HEATING | FURNACE MEAN ELEVATION FEET ABOVE SEA LEVEL Ft (M)
VALUE INPUT 0 to 2000 | 2001 to 3000t | 3001 to 4000 | 4001 to 5000 5001 to 6000 6001 to 7000 7001 to 8000
BTU/CU. BTU/ (0 to 610) (610.1 to (914.1 to (1219.1 to (1524.1 to (1829.1 to (2134.1 to
FT. BURNER 914)t 1219) 1524) 1829) 2134) 2438)
2500 10.0 8.9 8.4 10.0 10.0 10.0 10.0
Orifice 20000
Size
2500 9.9 8.4 8.0
Orifice 195004
Size
#55 #55 # 55
#55 #55 # 55
+ Applies to 100,000 BTU models when installed in the downflow or horizontal applications
Conversion: 1 in we = 249 Pa
NOTE: Propane data is based on 1.53 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI Z223.1—2006/NFPA
54-2006 or National Standard of Canada, Natural Gas and Propane Installation Code CSA B149.1—-05.
In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design—certified by CSA.
Tin Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (609.6 to 1371.6m) above sea level. Use
the 2001 to 3000 (609.9 to 914.4m) column in Tables 6 and 7.
The burner orifice part nos. are as follows: General Derating Rules
Orifice #41 333730-701
Orifice #42 333730-702 1. These furnaces may be used at full input rating when in-
Orifice #43 333730-703 stalled at altitudes up to 2,000’ (610 M). When installed
Orifice #44 333730-704 above 2,000’ (610 M), the input must be decreased 2%
Orifice #45 333730-705 (natural) or 4% (Propane) for each 1000’ (305 M) above
Orifice #46 333730-709 sea level in the USA. In Canada, the input rating must be
Orifice #47 333730-710 derated 5% (natural) or 10% (Propane) for each 1000’ (305
Orifice #48 333730-711 M) above sea level. See Table 6 or 7 for required high
Orifice #49 333730-712 altitude input rate.
Orifice #54 333730-706 2. For operation with natural gas at altitudes above 2,000’
Orifice #55 333730-707 (610 M), orifice change and/or manifold pressure adjust-
Orifice #56 333730-708 ments may be required for the gas supplied. First consult