Installation guide

66840/035-20003-001Rev.B(1205)
GAS ORIFICE CONVERSION FOR PROPANE (LP)
Refer to Table 7 for the proper gas orifice size.
The conversion 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, an
explosion or production of carbon monoxide may result causing
property damage, personal injury or loss of life. The qualified ser-
vice agency is responsible for the proper installation. The installa-
tion is not proper and complete until the operation of the converted
appliance is checked as specified in the manufacturer's instruc-
tions.
Improper installation may damage equipment, can create a shock
hazard, and will void the warranty,
IMPORTANT: These instructions are for the use of qualified individuals
specially trained, experienced and certified in the installation d this type
of equipment and related system components. Installation and service
personnel are required by some states to be licensed. Persons not
qualified shall not install this equipment nor interpret these instructions.
NOTE: The words "Shall" or "Must" indicate a requirement, which is
essential to satisfactory and safe product performance.
NOTE: The words "Should" or "May" indicate a recommendation or
advice which is not essential and not required but which may be
useful or helpful.
CONTENTS
1. Burner orifices for LP (propane) gas are located in bag attached to
the gas valve.
2. Conversion plate.
BURNER GAS VALVE
GAS
ORIFICE GAS
MANIFOLD
FIGURE 11: Burner Assembly
CONVERSION PROCEDURE
CAUTION]
The gas supply must be shut off prior to disconnecting the electrical
power, before proceeding with the conversion.
AWARNING
SHOCK HAZARD - Turn off electrical supply to furnace
1. Shut off gas supply at valve upstream from furnace or at meter as
required. Refer to Figures 9 and 10.
2. Disconnect as supply piping from gas valve on furnace.
3. Disconnect electrical wires from gas valve, nothing which wires
are connected to which terminals.
4. Remove the four screws that attach the gas manifold to the burner
support box. See Figure 11.
5. Remove and discard natural gas orifices.
6. Remove LP (Propane) orifices from the bag attached to the gas
valve.
7. Install the LP (Propane) gas orifices supplied with the furnace.
Tighten to 15 - 25 inch - pounds of torque.
8. Reinstall the manifold in the assembly by reversing the removal
process.
9. Reconnect the wires to the proper terminals on the gas valve.
10. Remove the regulator with the blue cap and turn it upside down so
the letters "LP" are upright. Place the blue cap on the opposite end
of the regulator.
11. Convert the gas valve for LP (propane) gas operation by following
the instructions. Remove the natural tag and replace with the pro-
pane tag supplied in the orifice bag to the gas burner mounting
plate to show that is has been converted.
12. Remove the blue conversion label on the furnace door after the
furnace has been converted.
13. Reconnect the gas supply piping to the gas valve and insure that
all gas connections are tight.
14. Remove pressure tap plugs from gas valve and connect water
gauge to the pressure tap ports. See Figure 8 for location of the
gas valve pressure taps and pressure regulator adjustment.
15. Turn on gas supply to furnace and check all gas connections with
suitable leak detector.
Never use an open flame to check for leaks. Fire or explosion could
occur. Since some leak solutions including soap and water may
cause corrosion or stress cracking, the piping must be rinsed with
water after testing unless it has been determined that the leak test
solution is non-corrosive.
HIGH ALTITUDE GAS ORIFICE CONVERSION
This furnace is constructed at the factory for natural gas-fired operation
at 0 - 2,000 ft. (0 m - 610 m) above sea level.
The gas orifices on this furnace must be changed in order to maintain
proper and safe operation, when the furnace is installed in a location
where the altitude is greater than 2,000 ft. (610 m) above sea level on
natural gas or the altitude is greater than 4,000 ft. (1219 m) above sea
level on propane (LP) gas. Refer to Table 7 or the instructions in the
high altitude conversion kit for the proper gas orifice size.
The unit may also be converted for altitudes up to !0,000 ft. (3048 m)
on natural and propane (LP) gas with additional derate as shown in
Table 7 or refer to ANSI Z223.1 NFPA 54 National Fuel Gas Code or in
Canada CAN/CGA-B149.1-00 Natural Gas and Propane Installation
Code.
10 Unitary Products Group