PROPER BURNER FLAME
The burner flame may be observed through the sight glass located in the burner box cover. See Figure 11. A proper flame will have a dark blue inner mantle, with a lighter blue outer mantle that extends from the burner into the heat exchanger tube, (see Figure 12). There is no primary air adjustment on the burner, and proper flame is assured since the correct manifold pressure and orificing has been done at the factory for elevations up to 2,000 feet.
TO REMOVE MAIN BURNER FOR
INSPECTION AND CLEANING
a.Turn off all electrical supply to heater.
b.Turn off gas supply.
c.Remove cabinet cover.
d.Remove burner box cover. See Figure 13.
e.Remove two (2) screws holding burner to burner bracket. See Figure 13.
f.Burner can now be slid forward off orifice, lift up, slide back and out of burner box.
g.Clean or replace as needed.
h.Reinstall by reversing Steps “f” through “a”.
BURNER ORIFICE
This heater is orificed at the factory for elevations up to 2,000 ft. If installed above 2,000 ft., the BTU input must be reduced 4% per 1,000 ft. See the following orifice chart for the proper orifice for a specific elevation.
SPECIFIC ELEVATIONS
MODEL | 0 to | 2,000’ | 4,000’ | 6,000’ | 8,000’ - |
NO. | 2,000’ | 4,000’ | 6,000’ | 8,000’ | 10,000’ |
NATURAL GAS
BBT53 | 5 6 | 5 7 | 5 7 | 5 9 | 6 0 |
BBT103 | 1.45mm | 5 4 | 5 4 | 5 5 | 5 5 |
|
| L.P. GAS |
|
| |
BBT54 | 7 0 | 7 1 | 7 1 | 7 2 | 7 3 |
BBT104 | 6 3 | 6 5 | 6 5 | 6 6 | 6 8 |
ORDER KIT #49800
Page 13
BURNER BOX
COVER
SIGHT
GLASS
FIGURE 11
COMBUSTION | BURNER | |
TUBE | ||
|
BURNER FLAME
FIGURE 12
Burner Box
Burner Orifice
Burner |
|
| Burner Access |
| Plate |
Burner | Sight |
Bracket | |
Sight Glass | Glass |
Gasket |
|
FIGURE 13
