4
FLAME SENSOR
(BELOW BURNER)
FLAME ROLLOUT
SWITCH
BRACKET, IGNITER
IGNITER
BURNER SUPT. ASSY
BURNER ASSY
A11403
Fig. 3 -- Burner Assembly
ORIFICE SELECTION/DERATE
UNIT DAMAGE HAZARD
Failure to follow this caution may result in unit damage.
DO NOT re--drill burner orifices. Improper drilling may
result in burrs, out--of--round holes, etc. Obtain new orifices
if orifice size must be changed. (See Fig. 4.)
CAUTION
!
BURNER
ORIFICE
BURNER
ORIFICE
A96249
Fig. 4 -- Burner Orifice
Refer to conversion kit rating plate 339852--201 to determine
main burner orifice size. (See Fig. 5.)
Furnace gas input rate on furnace rating plate is for installations at
altitudes up to 2000 ft. (610 M).
In the U.S.A
.; the input rating for altitudes above 2000 ft. (610
M) must be reduced by 2 percent for each 1000 ft. (305 M) above
sea level.
In Canada
, the input rating must be derated by 5 percent for
altitudes of 2000 ft. to 4500 ft. (610 M to 1372 M) above sea
level.
The Conversion Kit Rating Plate accounts for high altitude
derate.
INSTALL ORIFICES
1. Install main burner orifices. Do not use Teflon tape. Fin-
ger--tighten orifices at least one full turn to prevent cross--
threading, then tighten with wrench.
2. There are enough orifices in each kit for largest furnace.
Discard extra orifices.
NOTE
: DO NOT reinstall the manifold at this time.
INSTALL MIXER SCREWS
NOTE
:
There are 2 sets of mixer screws. One set is for
Condensing gas furnaces, the other set is for Non--condensing gas
furnaces. Use only the parts in the bag marked
“REQUIRED
FOR THE CONVERSION OF CONDENSING GAS
FURNACES TO PROPANE GAS”
1. See Fig. 6 to verify you have the correct set of mixer
screws.
2. Locate the dimple on each burner venturi tube.
3. If you cannot locate the dimple, refer to Fig. 7 for location
of the mixer screw.
4. Drill a 7/64--in (2.8 mm) hole in each dimple with a sup-
plied drill bill.
5. Install a mixer screw in each drilled hole drilling as
straight as possible (i.e. in the center of the gas flow stream
as well as perpendicular to the gas flow stream).
6. The screw head should be flush with the top of the burner
venturi.
A13056
Fig. 5 -- Conversion Kit Rating Plate
