j. Remove natural gas orifices from manifold and place
them in the bag supplied marked "Natural Gas Orifices."
Manufactured (mobile) home installations are required to
have these materials located with furnace for future
conversion.
k. Install main burner orifices. Do not use Teflon tape.
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.
Orifices of other sizes must be field supplied and are
available through your local distributor.
l. Reinstall manifold, orifices, and gas valve assembly in
burner box. Ensure manifold seal is installed properly
and burners fit over orifices. (See Fig. 32.)
m. Reconnect wires to gas valve. Refer to furnace wiring
schematic or as labeled earlier for proper wire location.
n. Reinstall burner enclosure pressure tube to gas valve
burner enclosure reference pressure tap. (See Fig. 31.)
o. Reinstall gas supply pipe to gas valve using backup
wrench to prevent rotation and improper orientation.
NOTE:
Use propane-gas-resistant pipe dope to prevent gas leaks.
DO NOT use Teflon tape.
WARNING:
Gas valve knob or switch MUST be facing
forward or tilted upward. Failure to follow this warning
could result in property damage, personal injury, or death.
NOTE:
DO NOT reinstall burner enclosure front at this time.
4. Check Inlet Gas Pressure
NOTE:
For propane applications, inlet gas pressure must be
regulated between 11.0-in. wc and 13.6-in. wc.
a. Be sure main gas and electric supplies to furnace are off.
b. Remove 1/8-in. pipe plug from inlet pressure tap on gas
valve. (See Fig. 31.)
c. Attach manometer to inlet pressure tap on gas valve.
(See Fig. 36.)
d. Turn on furnace power supply.
e. Turn gas supply manual shutoff valve to ON position.
f. Turn furnace gas valve control knob or switch to ON
position.
CAUTION:
DO NOT operate furnace more than 1
minute to check inlet gas pressure as conversion is not
complete at this time.
g. Jumper R and W thermostat connections to call for heat.
h. When main burners have ignited, confirm proper inlet
gas pressure is between 11.0-in. wc and 13.6-in. wc for
propane applications.
i. Remove jumper across R and W thermostat connections
to terminate call for heat.
j. Turn furnace gas valve control knob or switch to OFF
position.
k. Turn gas supply manual shutoff valve to OFF position.
Fig. 35—Conversion Kit Rating Plate
A99049e
MANUFACTURED
(MOBILE)
OR
MODULAR
HOME
RATING
PLATE
FUEL USED: PROPANE GAS
INLET PRESSURE (min - max): 11.0 - 13.6 in. WC
ALTITUDE
OF
INSTALLATION
(FT.
ABOVE
SEA
LEVEL)
U.S.A.
*
0 - 2000
3001-4000
55
55
55
55
1.30mm
1.30mm
1.30mm
1.30mm
1.30mm
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
FUEL USED: NATURAL GAS
INLET PRESSURE (min - max): 4.5 - 13.6 in. wc
324998-101
REV.
A
(LIT)
Orifice
No.
Manifold
Pressure
2001-3000 *
4001-5000 5001-6000 6001-7000 7001-8000 8001-9000 9001-10000
This appliance is for Manufactured (Mobile) or Modular home applications only. Refer to installation instructions for gas conversion
procedures. Use parts supplied by manufacturer and installed by qualified personnel. See main rating plate for appliance model number
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 by 2% for each 1000 ft above sea level. In Canada the input rating must be derated by 5% for altitudes
of 2000 ft to 4500 ft above sea level.
Furnace supplied with 45 orifices. Adjust input rate using local natural gas heat content and application altitude to determine proper
orifice size. See installation instructions.
* For Canadian Installations from 2000 to 4500 ft use U.S.A. Column 2001 to 3000 ft.
Fig. 36—Adjusting Manifold Pressure Using Manometer
A99018
7
6
5
4
3
2
1
0
1
2
3
4
5
6
7
BURNER ENCLOSURE
(REMOVE COVER WHEN
CHECKING PRESSURE)
GAS VALVE
PRESSURE
SWITCH
MANOMETER
—31—
Содержание 351DAS
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