Carrier KGAPN20012SP User manual

NOTE: Read the entire instruction manual before starting the installation.
This symbol →indicates a change since the last issue.
SAFETY CONSIDERATIONS
Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified personnel should
install, repair, or service heating equipment.
Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be performed
by trained service personnel. When working on heating equipment, observe precautions in the literature, on tags, and on labels attached to or
shipped with the unit, and other safety precautions that may apply.
Follow all safety codes. In the United States, follow all safety codes including the National Fuel Gas Codes NFPA No. 54-1996/ANSI Z223.1-1996
(NFGC). In Canada, refer to the National Standard of Canada Natural Gas and Propane Gases Installation Codes, CAN/CGA-B149.1 and .2-M95
(NSCNGPIC).
Wear safety glasses and work gloves. Have a fire extinguisher available during start-up operation, adjustment procedures, and service calls.
Recognize safety information. This is the safety-alert symbol . When you see this symbol on the furnace and in instructions or manuals, be
alert to the potential for personal injury.
Understand the signal word DANGER, WARNING, CAUTION, or NOTE. The words DANGER, WARNING, and CAUTION are used with the
safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies
hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which would result in minor personal injury
or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.
WARNING: This conversion kit shall be installed by a qualified service agency in
accordance with the manufacturer’s instructions and all applicable codes and requirements
of the authority having jurisdiction. If the information in these instructions is not followed
exactly, a fire, explosion, or production of carbon monoxide may result causing property
damage, personal injury, or loss of life. The qualified service agency performing this work
assumes responsibility for the proper conversion of this furnace with this kit.
In Canada, the conversion shall be carried out in accordance with the requirements of the
provincial authorities having jurisdiction and the National Standard of Canada Natural Gas
and Propane Installation Code (NSCNGPIC).
AVERTISSEMENT: Cet ensemble de conversion ne doit être installé que par le représen-
tant d’un organisme qualifié et conformément aux instructions du fabricant et à tous les
codes et exigences applicables de l’autorité compétente. Quiconque ne respecte pas à la
lettre les instructions dans le présent manuel risque de déclencher un incendie ou une
explosion entraînant des dommages matériels, des lésions corporelles ou la perte de vies
humaines. L’organisme qualifié qui effectue les travaux est responsable de la conversion
correcte de ce générateur d’air chaud à l’aide de cet ensemble.
INTRODUCTION
This instruction covers the installation of gas conversion kit Part No. KGAPN20012SP to convert the following furnaces from propane gas usage
to natural gas usage. See the appropriate section for your furnace type.
®
CANADIAN GAS ASSOCIATION
APPROVED
R
Installation Instructions
KGAPN20012SP
Gas Conversion Kit
Propane-to-Natural for
Variable-Speed and
2-Speed Furnaces
Form: AG-GAPN-13 Cancels: AG-GAPN-12 Printed in U.S.A. 8-97 Catalog No. 63GA-PN0

• Section 1—Models 58DXT, 58TMA, 58TUA, 58UHV, 58UXT, 58UXV, 330AAV, 330JAV, 331AAV, 331JAV, 333BAV, and 333JAV
Induced-Combustion, Hot Surface Ignition, 2-Speed and Variable-Speed Non-Condensing Furnaces. The kit is designed for use in 040 through
140 size furnaces.
• Section 2—Models 58MVP and 355MAV Multipoise, Hot Surface Ignition, Variable-Speed Condensing Furnaces. The kit is designed for use
in 040 through 120 size furnaces.
WARNING: Improper installation, adjustment, alteration, service, maintenance, or use can cause carbon monoxide
poisoning, explosion, fire, electrical shock, or other conditions which could result in personal injury or death. Consult a
qualified installer, service agency, local gas supplier, or your distributor or branch for information or assistance. The
qualified installer or agency must use only factory-authorized kits and accessories when modifying this product. Failure to
follow these instructions could result in serious injury or property damage.
CAUTION: Gas supply MUST be shut off before disconnecting electrical power and proceeding with conversion.
DESCRIPTION AND USAGE
This kit is designed for use in the furnaces listed above. See Table 1 for kit contents. The conversion uses a White-Rodgers 36E 2-stage gas valve.
More parts are shipped in kit than are needed to complete conversion. Furnace models 58DXT, 58UXT, 58UXV, 330JAV, 331JAV, and 333JAV
that reside in South Coast Air Quality Management District or Bay Area Air Quality Management District in California, or other areas that regulate
NO
x
emissions below 40 ng/J for natural gas furnaces must be outfitted with NO
x
reducing device. Use kit number 322562-751 to convert to low
NO
x
emissions furnace. When installation is complete, discard extra parts.
Table 1— Kit Contents
DESCRIPTION PART NO. QUANTITY
Gas Valve—Natural (White-Rodgers 36E, 2-Stage, Elect. Sw.) EF33CW195 1
Main Burner Orifice (Drill Size No. 42) LH32DB207 7
Main Burner Orifice (Drill Size No. 43) LH32DB202 7
Main Burner Orifice (Drill Size No. 44) LH32DB200 7
Main Burner Orifice (Drill Size No. 45) LH32DB205 7
Conversion Rating Plate Label 323870-101 1
Conversion Responsibility Label 321201-104 1
Installation Instructions AG-GAPN-13 1
—2—
→

SECTION 1—MODELS 58DXT, 58TMA, 58TUA, 58UHV, 58UXT, 58UXV, 330AAV, 330JAV, 331AAV, 331JAV, 333BAV,
AND 333JAV INDUCED-COMBUSTION, HOT SURFACE IGNITION, 2-SPEED AND VARIABLE-SPEED,
NON-CONDENSING FURNACES
PROCEDURE 1—INSTALL MAIN BURNER ORIFICES
NOTE: See Fig. 1 or 2 for component location.
1. Turn off main gas and electrical supplies to furnace.
2. Remove control access door.
3. Turn furnace gas valve control knob or electric switch to OFF position.
4. Remove burner hold-down bracket.
5. Remove burners from manifold.
6. Remove and discard orifices from manifold.
7. Determine natural gas orifice size for correct input at installed altitude by using Table 2 (for upflow and upflow/horizontal models) or Table
3 (for downflow and downflow/horizontal models). (See also Fig. 3.)
Furnace gas input rate on rating plate is for installations at altitudes up to 2000 ft.
In the U.S.A., the input rating for altitudes above 2000 ft must be reduced by 4 percent for each 1000 ft above sea level.
Fig. 1—Upflow and Upflow/Horizontal, 2-Speed and
Variable-Speed, Non-Condensing Furnace
Compartment and Conversion Label Location
A95461
CONVERSION
RESPONSIBILITY
LABEL
CONVERSION
RATING
PLATE
BURNERS
CLEARANCE LABEL
FURNACE
RATING
PLATE
BURNER 
HOLD–DOWN 
BRACKET
MANIFOLD
GAS VALVE
Fig. 2—Downflow and Downflow/Horizontal, 2-Speed,
Non-Condensing Furnace Compartment
and Conversion Label Location
A95462
GAS VALVE
BURNER 
HOLD–DOWN 
BRACKET
CONVERSION
RESPONSIBILITY
LABEL
CONVERSION
RATING
PLATE
MANIFOLD
BURNERS
CLEARANCE LABEL
FURNACE
RATING
PLATE
→Fig. 3—Conversion Rating Plate Label
(Used for Natural Gas, Non-Condensing, 2-Speed and Variable-Speed Furnaces)
A97180
CONVERSION KIT RATING PLATE - CARRIER CORP.
APPLIANCE MODELS
58MVP, 355MAV
323870-101 REV. B
Max. Inlet Gas Pressure
(Press. Max. D’Admission De Gaz)
Manifold
Pressure
13.6 3,386
4.5 1,121
0-2,000 ft.
(0 - 610 m)
3.2 - 3.8 797 - 946
Refer to installation manual
Respecter les instruction D’Installation
2% 5%
4% 10%
58TMA, 58DXT,
331AAV, 331JAV
58TUA, 58UXT,
58UHV, 58UXV,
330AAV, 330JAV,
333BAV, 333JAV
THIS APPLIANCE HAS BEEN CONVERTED TO USE NATURAL GAS FOR FUELREFER TO KIT INSTRUCTIONS FOR CONVERSION
PROCEDURES. USE PARTS SUPPLIED BY CARRIER CORPORATION AND INSTALLED BY QUALIFIED PERSONNEL. SEE EXISTING
RATING PLATE FOR APPLIANCE MODEL NO. AND INPUT RATING.
NOTE: Furnace gas input rate on rating plate is for installations up to 2000 ft. above sea level. In U.S.A. the input rating for altitudes above
2000 ft. must be derated (per chart below) for each 1000 ft above sea level. In Canada the input rating must be derated (per chart below) for
altitudes of 2000 ft. to 4500 ft. above sea level.
Pression
Tubulure
High Heat 1.3 - 1.7 324 - 423
4% 10%
Min. Inlet Gas Pressure
(Press. Min. D’Admission DeGaz)
2,000 - 10,000 ft
(610 - 3050 m)
KIT NO. KGAPN20012SP FUEL USED: NATURAL GAS
(For Purpose of Input Adjustment) (Pour L’Adjustment D’Entree)
Altitude
IN. W.C. (PO C.E.) Pa
Low Heat
% DERATE
PER
1000 FT
% DERATE
FOR
2000-4500 FT
USA CANADA NATURAL GAS PRESSURE
—3—
→
→

In Canada, the input rating must be derated by 10 percent for altitudes of 2000 ft to 4500 ft above sea level.
a. Obtain yearly heat value average (at installed altitude) for local gas supply.
b. Obtain yearly specific gravity average for local gas supply.
c. Verify furnace model and select appropriate table. Table 2 can only be used for upflow and upflow/horizontal, 2-speed and
variable-speed, non-condensing furnaces. Table 3 can only be used for downflow and downflow/horizontal, 2-speed, non-condensing
furnaces.
d. Find installation altitude in Table 2 (for upflow and upflow/horizontal models) or Table 3 (for downflow and downflow/horizontal
models).
NOTE: For Canada altitudes of 2000 to 4500 ft, use U.S.A. altitudes of 2001 to 3000 ft in Table 2 or 3.
e. Find closest natural gas heat value and specific gravity in Table 2 (for upflow and upflow/horizontal models) or Table 3 (for downflow
and downflow/horizontal models).
f. Follow heat value line and specific gravity line to point of intersection to find orifice size and manifold pressure settings for proper
operation at given natural gas condition.
EXAMPLE: (Using Table 2 at 0—2000 ft altitude)
Heat value 1050 Btu/cu ft
Specific gravity 0.62
Therefore, Orifice No. 45 is required.
8. Install main burner orifices. Finger-tighten orifices at least 1 full turn to prevent cross threading, then tighten with wrench. There are enough
orifices in each kit for the largest furnace. Discard extra orifices. Orifices of other sizes must be field supplied and are available through
your local distributor.
NOTE: DO NOT reinstall main burners or burner hold-down bracket at this time.
PROCEDURE 2—REPLACE AND CONVERT GAS VALVE. (SEE FIG. 4.)
NOTE: Discard labels and instructions packaged with White-Rodgers gas valve. All necessary information is provided in this instruction.
1. Be sure gas and electrical supplies to furnace are off.
2. Remove wires from gas valve. Note location for reassembly.
3. If a low gas pressure switch (LGPS) is installed on inlet pressure tap of gas valve, remove 2 wires to LGPS.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and
dangerous operation.
ATTENTION: Lors des opérations d’entretien des commandes, étiqueter tous les fils avant de les déconnecter. Toute
erreur de câblage peut être une source de danger et de panne.
4. Remove gas supply line from gas valve.
5. Remove propane gas valve using backup wrench and discard valve. On some models, the pressure switch assembly may need to be loosened
and moved aside to permit removal of the gas valve.
NOTE: Propane gas valve has RED knob, and natural gas valve has a BLUE knob or ELECTRIC SWITCH.
6. Modify natural gas valve.
a. Remove burner enclosure reference pressure tap from natural gas valve. (See Fig. 4.)
b. Remove plug button from same location on propane gas valve and insert in hole in new natural gas valve from which pressure tap was
removed.
CAUTION: DO NOT redrill burner orifices. Improper drilling (burrs, out-of-round holes, etc.) can cause excessive
burner noise and misdirection of burner flames. This can result in flame impingement of the burners and heat exchanger
causing failure. Obtain new orifices if orifice size must be changed.
A96249
BURNER 
ORIFICE BURNER 
ORIFICE
—4—
→

Table 2—Upflow and Upflow/Horizontal, 2-Speed and Variable-Speed, Hot Surface Ignition, Non-Condensing
Furnace Orifice Size and Manifold Pressure for Correct Input
(Tabulated Data Based on 20,000 Btuh High Heat/13,000 Btuh Low Heat per Burner,
Derated 4% for Each 1000 Ft Above Sea Level)*
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. and Canada
850 43 3.7/1.5 43 3.8/1.6 42 3.2/1.4 42 3.3/1.4 42 3.4/1.4
875 43 3.5/1.5 43 3.6/1.5 43 3.7/1.6 43 3.8/1.6 42 3.2/1.4
900 44 3.7/1.6 43 3.4/1.4 43 3.5/1.5 43 3.6/1.5 43 3.7/1.6
0 925 44 3.5/1.5 44 3.7/1.6 44 3.8/1.6 43 3.4/1.4 43 3.5/1.5
950 44 3.4/1.4 44 3.5/1.5 44 3.6/1.5 44 3.7/1.6 44 3.8/1.6
to 975 44 3.2/1.3 44 3.3/1.4 44 3.4/1.4 44 3.5/1.5 44 3.6/1.5
1000 45 3.7/1.6 45 3.8/1.6 44 3.2/1.4 44 3.4/1.4 44 3.5/1.5
2000 1025 45 3.5/1.5 45 3.6/1.5 45 3.7/1.6 44 3.2/1.3 44 3.3/1.4
1050 45 3.3/1.4 45 3.4/1.5 45 3.6/1.5 45 3.7/1.6 45 3.8/1.6
1075 45 3.2/1.3 45 3.3/1.4 45 3.4/1.4 45 3.5/1.5 45 3.6/1.5
1100 47 3.6/1.5 47 3.7/1.6 45 3.2/1.4 45 3.4/1.4 45 3.5/1.5
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. and Canada
U.S.A. 775 43 3.4/1.4 43 3.5/1.5 43 3.6/1.5 43 3.7/1.6 43 3.8/1.6
Altitudes 800 44 3.6/1.5 44 3.8/1.6 43 3.4/1.4 43 3.5/1.5 43 3.6/1.5
2001 825 44 3.4/1.4 44 3.5/1.5 44 3.7/1.5 44 3.8/1.6 43 3.4/1.4
to 850 44 3.2/1.4 44 3.3/1.4 44 3.4/1.5 44 3.6/1.5 44 3.7/1.5
3000 875 45 3.7/1.6 45 3.8/1.6 44 3.2/1.4 44 3.4/1.4 44 3.5/1.5
or 900 45 3.5/1.5 45 3.6/1.5 45 3.7/1.6 45 3.8/1.6 44 3.3/1.4
Canada 925 45 3.3/1.4 45 3.4/1.4 45 3.5/1.5 45 3.6/1.5 45 3.7/1.6
Altitudes 950 47 3.7/1.6 45 3.2/1.4 45 3.3/1.4 45 3.4/1.5 45 3.6/1.5
2000 975 47 3.5/1.5 47 3.6/1.5 45 3.2/1.3 45 3.3/1.4 45 3.4/1.4
to 1000 48 3.8/1.6 47 3.5/1.5 47 3.6/1.5 47 3.7/1.6 45 3.2/1.4
4500 1025 48 3.6/1.5 48 3.8/1.6 47 3.4/1.4 47 3.5/1.5 47 3.6/1.5
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
750 44 3.6/1.5 44 3.8/1.6 43 3.4/1.4 43 3.5/1.5 43 3.6/1.5
775 44 3.4/1.4 44 3.5/1.5 44 3.6/1.5 44 3.8/1.6 43 3.4/1.4
800 44 3.2/1.4 44 3.3/1.4 44 3.4/1.4 44 3.5/1.5 44 3.6/1.5
3001 825 45 3.6/1.5 45 3.8/1.6 44 3.2/1.4 44 3.3/1.4 44 3.4/1.4
850 45 3.4/1.4 45 3.5/1.5 45 3.7/1.5 45 3.8/1.6 44 3.2/1.4
to 875 45 3.2/1.4 45 3.3/1.4 45 3.5/1.5 45 3.6/1.5 45 3.7/1.6
900 47 3.6/1.5 45 3.2/1.3 45 3.3/1.4 45 3.4/1.4 45 3.5/1.5
4000 925 47 3.4/1.5 47 3.6/1.5 47 3.7/1.6 45 3.2/1.4 45 3.3/1.4
950 48 3.7/1.6 48 3.8/1.6 47 3.5/1.5 47 3.6/1.5 47 3.7/1.6
975 48 3.5/1.5 48 3.7/1.5 48 3.8/1.6 47 3.4/1.4 47 3.5/1.5
1000 48 3.4/1.4 48 3.5/1.5 48 3.6/1.5 48 3.7/1.6 48 3.8/1.6
* For 060135 and 135-20 sizes only, input is 19,000 Btuh for high fire. Deduct 0.1 in. from manifold pressure shown in table. Change orifice size if manifold pressure falls
below 3.2-in. wc.
—5—

Table 2—Upflow and Upflow/Horizontal, 2-Speed and Variable-Speed, Hot Surface Ignition, Non-Condensing
Furnace Orifice Size and Manifold Pressure for Correct Input-Continued
(Tabulated Data Based on 20,000 Btuh High Heat/13,000 Btuh Low Heat per Burner,
Derated 4% for Each 1000 Ft Above Sea Level)*
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
725 44 3.4/1.4 44 3.5/1.5 44 3.6/1.5 44 3.8/1.6 43 3.4/1.4
750 44 3.2/1.3 44 3.3/1.4 44 3.4/1.4 44 3.5/1.5 44 3.6/1.5
775 45 3.6/1.5 45 3.7/1.6 44 3.2/1.3 44 3.3/1.4 44 3.4/1.4
4001 800 45 3.4/1.4 45 3.5/1.5 45 3.6/1.5 45 3.7/1.6 44 3.2/1.3
825 45 3.2/1.3 45 3.3/1.4 45 3.4/1.4 45 3.5/1.5 45 3.6/1.5
to 850 47 3.6/1.5 47 3.7/1.6 45 3.2/1.4 45 3.3/1.4 45 3.4/1.4
875 48 3.8/1.6 47 3.5/1.5 47 3.6/1.5 47 3.7/1.6 45 3.2/1.4
5000 900 48 3.6/1.5 48 3.8/1.6 47 3.4/1.4 47 3.5/1.5 47 3.6/1.5
925 48 3.4/1.5 48 3.6/1.5 48 3.7/1.6 48 3.8/1.6 47 3.4/1.5
950 49 3.8/1.6 48 3.4/1.4 48 3.5/1.5 48 3.6/1.5 48 3.7/1.6
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
700 44 3.2/1.3 44 3.3/1.4 44 3.4/1.4 44 3.5/1.5 44 3.6/1.5
725 45 3.6/1.5 45 3.7/1.6 45 3.8/1.6 44 3.3/1.4 44 3.4/1.4
750 45 3.4/1.4 45 3.5/1.5 45 3.6/1.5 45 3.7/1.6 45 3.8/1.6
775 45 3.2/1.3 45 3.3/1.4 45 3.4/1.4 45 3.5/1.5 45 3.6/1.5
5001 800 47 3.5/1.5 47 3.6/1.5 45 3.2/1.3 45 3.3/1.4 45 3.4/1.4
825 48 3.8/1.6 47 3.4/1.4 47 3.5/1.5 47 3.7/1.5 45 3.2/1.3
to 850 48 3.6/1.5 48 3.7/1.6 48 3.8/1.6 47 3.4/1.5 47 3.5/1.5
875 48 3.4/1.4 48 3.5/1.5 48 3.6/1.5 48 3.7/1.6 48 3.8/1.6
6000 900 49 3.7/1.6 49 3.8/1.6 48 3.4/1.4 48 3.5/1.5 48 3.6/1.5
925 49 3.5/1.5 49 3.6/1.5 49 3.8/1.6 48 3.3/1.4 48 3.4/1.4
950 49 3.3/1.4 49 3.5/1.5 49 3.6/1.5 49 3.7/1.6 49 3.8/1.6
975 50 3.7/1.6 49 3.3/1.4 49 3.4/1.4 49 3.5/1.5 49 3.6/1.5
1000 50 3.6/1.5 50 3.7/1.6 50 3.8/1.6 49 3.3/1.4 49 3.4/1.4
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
650 44 3.2/1.4 44 3.3/1.4 44 3.4/1.4 44 3.5/1.5 44 3.6/1.5
675 45 3.6/1.5 45 3.7/1.6 45 3.8/1.6 44 3.3/1.4 44 3.4/1.4
700 45 3.3/1.4 45 3.5/1.5 45 3.6/1.5 45 3.7/1.6 45 3.8/1.6
6001 725 47 3.7/1.6 45 3.2/1.4 45 3.3/1.4 45 3.4/1.5 45 3.5/1.5
750 47 3.5/1.5 47 3.6/1.5 47 3.7/1.6 45 3.2/1.4 45 3.3/1.4
to 775 48 3.7/1.6 48 3.8/1.6 47 3.5/1.5 47 3.6/1.5 47 3.7/1.6
800 48 3.5/1.5 48 3.6/1.5 48 3.7/1.6 48 3.8/1.6 47 3.5/1.5
7000 825 49 3.8/1.6 48 3.4/1.4 48 3.5/1.5 48 3.6/1.5 48 3.7/1.6
850 49 3.6/1.5 49 3.7/1.6 48 3.3/1.4 48 3.4/1.4 48 3.5/1.5
875 49 3.4/1.4 49 3.5/1.5 49 3.6/1.5 49 3.8/1.6 48 3.3/1.4
* For 065135 and 135-20 sizes only, input is 19,000 Btuh for high fire. Deduct 0.1 in. from manifold pressure shown in table. Change orifice size if manifold pressure falls
below 3.2-in. wc.
—6—

Table 2—Upflow and Upflow/Horizontal, 2-Speed and Variable-Speed, Hot Surface Ignition, Non-Condensing
Furnace Orifice Size and Manifold Pressure for Correct Input-Continued
(Tabulated Data Based on 20,000 Btuh High Heat/13,000 Btuh Low Heat per Burner,
Derated 4% for Each 1000 Ft Above Sea Level)*
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
625 45 3.6/1.5 45 3.7/1.6 44 3.2/1.3 44 3.3/1.4 44 3.4/1.4
650 45 3.3/1.4 45 3.5/1.5 45 3.6/1.5 45 3.7/1.6 45 3.8/1.6
675 47 3.7/1.6 45 3.2/1.4 45 3.3/1.4 45 3.4/1.4 45 3.5/1.5
7001 700 47 3.4/1.4 47 3.5/1.5 47 3.7/1.5 45 3.2/1.3 45 3.3/1.4
725 48 3.6/1.5 48 3.8/1.6 47 3.4/1.4 47 3.5/1.5 47 3.6/1.5
to 750 48 3.4/1.4 48 3.5/1.5 48 3.6/1.5 48 3.8/1.6 47 3.4/1.4
775 49 3.7/1.6 48 3.3/1.4 48 3.4/1.4 48 3.5/1.5 48 3.6/1.5
8000 800 49 3.5/1.5 49 3.6/1.5 49 3.8/1.6 48 3.3/1.4 48 3.4/1.4
825 49 3.3/1.4 49 3.4/1.4 49 3.5/1.5 49 3.6/1.5 49 3.8/1.6
850 50 3.7/1.6 50 3.8/1.6 49 3.3/1.4 49 3.4/1.4 49 3.5/1.5
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
600 45 3.4/1.4 45 3.5/1.5 45 3.6/1.5 45 3.7/1.6 45 3.8/1.6
625 47 3.7/1.6 45 3.2/1.4 45 3.3/1.4 45 3.4/1.4 45 3.5/1.5
8001 650 47 3.4/1.4 47 3.5/1.5 47 3.6/1.5 45 3.2/1.3 45 3.3/1.4
675 48 3.6/1.5 48 3.7/1.6 48 3.8/1.6 47 3.5/1.5 47 3.6/1.5
to 700 48 3.3/1.4 48 3.5/1.5 48 3.6/1.5 48 3.7/1.6 48 3.8/1.6
725 49 3.7/1.5 49 3.8/1.6 48 3.3/1.4 48 3.4/1.5 48 3.5/1.5
9000 750 49 3.4/1.4 49 3.5/1.5 49 3.7/1.5 49 3.8/1.6 48 3.3/1.4
775 50 3.8/1.6 49 3.3/1.4 49 3.4/1.4 49 3.5/1.5 49 3.6/1.5
800 50 3.6/1.5 50 3.7/1.6 50 3.8/1.6 49 3.3/1.4 49 3.4/1.4
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
575 47 3.7/1.6 45 3.2/1.4 45 3.3/1.4 45 3.4/1.4 45 3.5/1.5
600 47 3.4/1.4 47 3.5/1.5 47 3.6/1.5 47 3.7/1.6 45 3.2/1.4
9001 625 48 3.6/1.5 48 3.7/1.6 48 3.8/1.6 47 3.5/1.5 47 3.6/1.5
650 48 3.3/1.4 48 3.4/1.4 48 3.5/1.5 48 3.6/1.5 48 3.7/1.6
to 675 49 3.6/1.5 49 3.7/1.6 49 3.8/1.6 48 3.4/1.4 48 3.5/1.5
700 49 3.3/1.4 49 3.4/1.5 49 3.6/1.5 49 3.7/1.6 49 3.8/1.6
10,000 725 50 3.7/1.6 50 3.8/1.6 49 3.3/1.4 49 3.4/1.4 49 3.5/1.5
750 50 3.4/1.5 50 3.6/1.5 50 3.7/1.6 50 3.8/1.6 49 3.3/1.4
775 51 3.8/1.6 50 3.3/1.4 50 3.4/1.5 50 3.5/1.5 50 3.7/1.5
* For 060135 and 135-20 sizes only, input is 19,000 Btuh for high fire. Deduct 0.1 in. from manifold pressure shown in table. Change orifice size if manifold pressure falls
below 3.2 in. wc.
—7—

Table 3—Downflow and Downflow/Horizontal, 2-Speed, Hot Surface Ignition, Non-Condensing
Furnace Orifice Size and Manifold Pressure for Correct Input
(Tabulated Data Based on 21,000 Btuh High Heat/13,500 Btuh Low Heat per Burner,
Derated 4% for Each 1000 Ft Above Sea Level)*
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. and Canada
850 42 3.3/1.4 42 3.4/1.4 42 3.5/1.5 42 3.7/1.5 42 3.8/1.6
875 43 3.8/1.6 42 3.2/1.3 42 3.3/1.4 42 3.5/1.4 42 3.6/1.5
900 43 3.6/1.5 43 3.7/1.5 42 3.2/1.3 42 3.3/1.3 42 3.4/1.4
0 925 43 3.4/1.4 43 3.5/1.5 43 3.6/1.5 43 3.8/1.6 42 3.2/1.3
950 44 3.7/1.5 44 3.8/1.6 43 3.5/1.4 43 3.6/1.5 43 3.7/1.5
to 975 44 3.5/1.5 44 3.6/1.5 44 3.8/1.6 43 3.4/1.4 43 3.5/1.4
1000 44 3.3/1.4 44 3.5/1.4 44 3.6/1.5 44 3.7/1.5 44 3.8/1.6
2000 1025 44 3.2/1.3 44 3.3/1.4 44 3.4/1.4 44 3.5/1.5 44 3.6/1.5
1050 45 3.7/1.5 45 3.8/1.6 44 3.2/1.3 44 3.4/1.4 44 3.5/1.4
1075 46 3.7/1.5 46 3.8/1.6 45 3.7/1.5 44 3.2/1.3 44 3.3/1.4
1100 46 3.5/1.5 46 3.6/1.5 46 3.8/1.6 45 3.7/1.5 45 3.8/1.6
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. and Canada
U.S.A. 775 43 3.7/1.5 42 3.2/1.3 42 3.3/1.4 42 3.4/1.4 42 3.5/1.4
Altitudes 800 43 3.5/1.4 43 3.6/1.5 43 3.7/1.5 42 3.2/1.3 42 3.3/1.3
2001 825 44 3.8/1.6 43 3.4/1.4 43 3.5/1.5 43 3.6/1.5 43 3.7/1.5
to 850 44 3.6/1.5 44 3.7/1.5 44 3.8/1.6 43 3.4/1.4 43 3.5/1.5
3000 875 44 3.4/1.4 44 3.5/1.4 44 3.6/1.5 44 3.7/1.5 44 3.8/1.6
or 900 44 3.2/1.3 44 3.3/1.4 44 3.4/1.4 44 3.5/1.4 44 3.6/1.5
Canada 925 46 3.8/1.6 45 3.8/1.6 44 3.2/1.3 44 3.3/1.4 44 3.4/1.4
Altitudes 950 46 3.6/1.5 46 3.7/1.5 45 3.7/1.5 45 3.8/1.6 44 3.2/1.3
2000 975 46 3.4/1.4 46 3.5/1.5 46 3.7/1.5 46 3.8/1.6 45 3.7/1.5
to 1000 47 3.7/1.5 47 3.8/1.6 46 3.5/1.4 46 3.6/1.5 46 3.7/1.5
4500 1025 47 3.5/1.5 47 3.6/1.5 47 3.8/1.6 46 3.4/1.4 46 3.5/1.5
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
750 43 3.5/1.4 43 3.6/1.5 43 3.7/1.5 42 3.2/1.3 42 3.3/1.4
775 44 3.8/1.6 43 3.4/1.4 43 3.5/1.4 43 3.6/1.5 43 3.7/1.5
800 44 3.5/1.5 44 3.7/1.5 44 3.8/1.6 43 3.4/1.4 43 3.5/1.4
3001 825 44 3.3/1.4 44 3.4/1.4 44 3.5/1.5 44 3.7/1.5 44 3.8/1.6
850 45 3.8/1.6 44 3.2/1.3 44 3.3/1.4 44 3.4/1.4 44 3.6/1.5
to 875 46 3.7/1.5 45 3.7/1.5 44 3.2/1.3 44 3.3/1.3 44 3.4/1.4
900 46 3.5/1.5 46 3.7/1.5 46 3.8/1.6 45 3.7/1.5 44 3.2/1.3
4000 925 47 3.8/1.6 46 3.5/1.4 46 3.6/1.5 46 3.7/1.5 46 3.8/1.6
950 47 3.6/1.5 47 3.7/1.5 46 3.4/1.4 46 3.5/1.5 46 3.6/1.5
975 47 3.4/1.4 47 3.5/1.5 47 3.7/1.5 47 3.8/1.6 46 3.4/1.4
1000 48 3.7/1.5 48 3.8/1.6 47 3.5/1.4 47 3.6/1.5 47 3.7/1.5
* For 060125 and 125-20 sizes only, input is 20,500 Btuh for high fire. Deduct 0.1 in. from manifold pressure shown in table. Change orifice size if manifold pressure falls
below 3.2-in. wc.
—8—

Table 3—Downflow and Downflow/Horizontal, 2-Speed, Hot Surface Ignition, Non-Condensing
Furnace Orifice Size and Manifold Pressure for Correct Input-Continued
(Tabulated Data Based on 21,000 Btuh High Heat/13,500 Btuh Low Heat per Burner,
Derated 4% for Each 1000 Ft Above Sea Level)*
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
725 44 3.8/1.6 43 3.4/1.4 43 3.5/1.4 43 3.6/1.5 43 3.7/1.5
750 44 3.5/1.5 44 3.6/1.5 44 3.8/1.6 43 3.4/1.4 43 3.5/1.4
775 44 3.3/1.4 44 3.4/1.4 44 3.5/1.5 44 3.6/1.5 44 3.7/1.5
4001 800 45 3.7/1.5 44 3.2/1.3 44 3.3/1.4 44 3.4/1.4 44 3.5/1.5
825 46 3.7/1.5 46 3.8/1.6 45 3.8/1.6 44 3.2/1.3 44 3.3/1.4
to 850 46 3.5/1.4 46 3.6/1.5 46 3.7/1.5 46 3.8/1.6 45 3.8/1.6
875 47 3.7/1.5 46 3.4/1.4 46 3.5/1.5 46 3.6/1.5 46 3.7/1.5
5000 900 47 3.5/1.5 47 3.6/1.5 47 3.8/1.6 46 3.4/1.4 46 3.5/1.5
925 48 3.8/1.6 47 3.4/1.4 47 3.6/1.5 47 3.7/1.5 47 3.8/1.6
950 48 3.6/1.5 48 3.7/1.5 48 3.8/1.6 47 3.5/1.4 47 3.6/1.5
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
700 44 3.5/1.5 44 3.6/1.5 44 3.8/1.6 43 3.4/1.4 43 3.5/1.4
725 44 3.3/1.4 44 3.4/1.4 44 3.5/1.4 44 3.6/1.5 44 3.7/1.5
750 45 3.7/1.5 44 3.2/1.3 44 3.3/1.4 44 3.4/1.4 44 3.5/1.4
775 46 3.6/1.5 46 3.8/1.6 45 3.7/1.5 44 3.2/1.3 44 3.3/1.4
5001 800 46 3.4/1.4 46 3.5/1.5 46 3.7/1.5 46 3.8/1.6 45 3.7/1.5
825 47 3.7/1.5 47 3.8/1.6 46 3.4/1.4 46 3.6/1.5 46 3.7/1.5
to 850 47 3.4/1.4 47 3.6/1.5 47 3.7/1.5 47 3.8/1.6 46 3.5/1.4
875 48 3.7/1.5 48 3.8/1.6 47 3.5/1.4 47 3.6/1.5 47 3.7/1.5
6000 900 48 3.5/1.4 48 3.6/1.5 48 3.7/1.5 47 3.4/1.4 47 3.5/1.4
925 48 3.3/1.4 48 3.4/1.4 48 3.5/1.5 48 3.6/1.5 48 3.8/1.6
950 49 3.7/1.5 49 3.8/1.6 48 3.3/1.4 48 3.5/1.4 48 3.6/1.5
975 49 3.5/1.4 49 3.6/1.5 49 3.7/1.5 48 3.3/1.4 48 3.4/1.4
1000 49 3.3/1.4 49 3.4/1.4 49 3.6/1.5 49 3.7/1.5 49 3.8/1.6
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
650 44 3.5/1.5 44 3.7/1.5 44 3.8/1.6 43 3.4/1.4 43 3.5/1.4
675 44 3.3/1.4 44 3.4/1.4 44 3.5/1.4 44 3.6/1.5 44 3.7/1.5
700 45 3.7/1.5 44 3.2/1.3 44 3.3/1.3 44 3.4/1.4 44 3.5/1.4
6001 725 46 3.6/1.5 46 3.7/1.5 45 3.7/1.5 45 3.8/1.6 44 3.2/1.3
750 47 3.8/1.6 46 3.5/1.4 46 3.6/1.5 46 3.7/1.5 46 3.8/1.6
to 775 47 3.6/1.5 47 3.7/1.5 47 3.8/1.6 46 3.5/1.4 46 3.6/1.5
800 48 3.8/1.6 47 3.5/1.4 47 3.6/1.5 47 3.7/1.5 47 3.8/1.6
7000 825 48 3.6/1.5 48 3.7/1.5 48 3.8/1.6 47 3.5/1.4 47 3.6/1.5
850 48 3.4/1.4 48 3.5/1.4 48 3.6/1.5 48 3.7/1.5 47 3.4/1.4
875 49 3.8/1.6 48 3.3/1.4 48 3.4/1.4 48 3.5/1.5 48 3.6/1.5
* For 060125 and 125-20 sizes only, input is 20,500 Btuh for high fire. Deduct 0.1 in. from manifold pressure shown in table. Change orifice size if manifold pressure falls
below 3.2-in. wc.
—9—

Table 3—Downflow and Downflow/Horizontal, 2-Speed, Hot Surface Ignition, Non-Condensing
Furnace Orifice Size and Manifold Pressure for Correct Input-Continued
(Tabulated Data Based on 21,000 Btuh High Heat/13,500 Btuh Low Heat per Burner,
Derated 4% for Each 1000 Ft Above Sea Level)*
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
625 44 3.3/1.4 44 3.4/1.4 44 3.5/1.5 44 3.6/1.5 44 3.7/1.5
650 45 3.7/1.5 45 3.8/1.6 44 3.3/1.3 44 3.4/1.4 44 3.5/1.4
675 46 3.6/1.5 46 3.7/1.5 46 3.8/1.6 45 3.8/1.6 44 3.2/1.3
7001 700 47 3.8/1.6 46 3.4/1.4 46 3.6/1.5 46 3.7/1.5 46 3.8/1.6
725 47 3.5/1.5 47 3.6/1.5 47 3.8/1.6 46 3.4/1.4 46 3.5/1.5
to 750 48 3.7/1.5 47 3.4/1.4 47 3.5/1.5 47 3.6/1.5 47 3.7/1.5
775 48 3.5/1.5 48 3.6/1.5 48 3.8/1.6 47 3.4/1.4 47 3.5/1.4
8000 800 48 3.3/1.4 48 3.4/1.4 48 3.5/1.5 48 3.6/1.5 48 3.7/1.5
825 49 3.6/1.5 49 3.8/1.6 48 3.3/1.4 48 3.4/1.4 48 3.5/1.5
850 49 3.4/1.4 49 3.5/1.5 49 3.7/1.5 49 3.8/1.6 48 3.3/1.4
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
600 45 3.7/1.5 44 3.2/1.3 44 3.3/1.4 44 3.4/1.4 44 3.5/1.4
625 46 3.6/1.5 46 3.7/1.5 46 3.8/1.6 45 3.8/1.6 44 3.2/1.3
8001 650 47 3.8/1.6 46 3.4/1.4 46 3.5/1.5 46 3.7/1.5 46 3.8/1.6
675 47 3.5/1.4 47 3.6/1.5 47 3.7/1.5 47 3.8/1.6 46 3.5/1.4
to 700 48 3.7/1.5 48 3.8/1.6 47 3.5/1.4 47 3.6/1.5 47 3.7/1.5
725 48 3.4/1.4 48 3.6/1.5 48 3.7/1.5 48 3.8/1.6 47 3.4/1.4
9000 750 49 3.8/1.6 48 3.3/1.4 48 3.4/1.4 48 3.5/1.5 48 3.7/1.5
775 49 3.5/1.5 49 3.7/1.5 49 3.8/1.6 48 3.3/1.4 48 3.4/1.4
800 49 3.3/1.4 49 3.4/1.4 49 3.5/1.5 49 3.7/1.5 49 3.8/1.6
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
Orifice
No.
Manifold
Pressure
High/Low
U.S.A. Only
575 46 3.6/1.5 46 3.7/1.5 46 3.8/1.6 45 3.8/1.6 44 3.2/1.3
600 47 3.7/1.5 46 3.4/1.4 46 3.5/1.5 46 3.6/1.5 46 3.8/1.6
9001 625 47 3.4/1.4 47 3.6/1.5 47 3.7/1.5 47 3.8/1.6 46 3.5/1.4
650 48 3.6/1.5 48 3.8/1.6 47 3.4/1.4 47 3.5/1.5 47 3.6/1.5
to 675 48 3.4/1.4 48 3.5/1.4 48 3.6/1.5 48 3.7/1.5 48 3.8/1.6
700 49 3.7/1.5 49 3.8/1.6 48 3.3/1.4 48 3.5/1.4 48 3.6/1.5
10,000 725 49 3.4/1.4 49 3.5/1.5 49 3.7/1.5 49 3.8/1.6 48 3.3/1.4
750 50 3.8/1.6 49 3.3/1.4 49 3.4/1.4 49 3.5/1.5 49 3.6/1.5
775 50 3.5/1.5 50 3.7/1.5 50 3.8/1.6 49 3.3/1.4 49 3.4/1.4
* For 060125 and 125-20 sizes only, input is 20,500 Btuh for high fire. Deduct 0.1 in. from manifold pressure shown in table. Change orifice size if manifold pressure falls
below 3.2-in. wc.
—10—