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NOx DEVICE INSTALLATION (when
required)
The following models must have NOx baffles installed (58PHX,
58PHY, 58DLX, 58STX, 313JAV, 313JBV, 311JAV, 310JAV,
PG8JEA, PG8JEB, and PG8JAA). NOx baffles are not included
in this kit and must be ordered separately or reused if retained
from original conversion to Propane.
For NOx device installation, follow these additional steps:
Figure 16
Representative Furnace Drawing
Representative drawing only, some models may vary in appearance.
9. Use a pair of needle nose pliers to install the NOx device.
10. Squeeze the sides of the device, if necessary, to install in
the heat exchanger.
11. Re-install screw in hole underneath heat exchanger inlet.
It is very IMPORTANT to reinstall the NOx bracket mounting
screw. (See Figure 17)
12. Repeat steps for each heat exchanger.
Figure 17
NOx Device Installation
ORIFICE SELECTION/DERATE
CAUTION
!
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 Figure 18)
Figure 18
Determine natural gas orifice size and manifold pressure for
correct input at installed altitude by using Table 5 or Table 6.
All models in all positions except Low NOx models in downflow
and horizontal positions use Table 5 (22,000 Btuh per burner).
Low NOx models in downflow or horizontal positions must use
Table 6 (21,000 Btuh per burner). See input listed on rating plate.
Use Table 5 (22,000 Btuh per burner) for models 58DLA, 58PHA,
58PHB, 58STA, 310AAV, 311AAV, 313AAV, 313ABV, PG8MAA,
and PG8MEA.
Use Table 6 (21,000 Btuh per burner) for Low NOx models
58DLX, 58PHX, 58PHY, 58STX, 310JAV, 311JAV, 313JAV,
313JBV, PG8JAA, PG8JEA, and PG8JEB.
1. Obtain yearly heat−value average (at installed altitude) for
local gas supply.
2. Obtain yearly specific−gravity average for local gas supply.
3. Find installation altitude in Table 5 or Table 6.
For Canada altitudes of 2000 to 4500 ft., use U.S.A. Altitudes of
2001 to 3000 ft. in Table 5 or Table 6.
4. Find closest natural gas heat value and specific gravity in
Table 5 or Table 6.
5. Follow heat−value line and specific−gravity line to point of
A03069
intersection to find orifice size and manifold pressure
setting.
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 4 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.
Finger-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.
DO NOT reinstall the manifold at this time.
A02195
12
Burner Orifice
BURNER
ORIFICE
BURNER
ORIFICE
A96249
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