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100353
TECHNICAL
SERVICE
You may have further questions about installation, operation, or troubleshooting.
If so, contact DESA International’s Technical Service Department at 1-800-323-
5190.
SPECIFICATIONS
Note:
These heaters are certified for elevations of 0-4500 feet above sea level. For
elevations above 2000 feet, de-rate heater 4% for each 1000 feet above sea level.
When gas pressure is too low
• pilot will not stay lit
• burner will have delayed ignition
• heater will not produce specified heat
When gas quality is bad
• pilot will not stay lit
• burner will produce yellow flames and soot
• heater will backfire when lit
You may feel your gas pressure is too low or gas quality is bad. If so, contact your
local natural gas supplier.
SERVICE
HINTS
35,000 BTU/Hr 50,000 BTU/Hr
Model Model
BTU 35,000 50,000
Type Gas Natural Only Natural Only
Ignition Piezo Piezo
Pressure Regulator Setting 3.5" W.C. 3.5" W.C.
Inlet Gas Pressure
Maximum 7" W.C. 7" W.C.
Minimum 5" W.C. 5" W.C.
Dimensions, Inches
Heater (H x W x D) 25 x 27
1
/4 x 16 28 x 32
1
/2 x 16
Shipping Weight (pounds) 78 98
Flue Vent Size 4" dia. 4" dia.
Orifice Size 34 drill, ø .111 29 drill, ø .136