children, and must not be stored in a building, garage or any other enclosed area.
•Indoor storage of the heater is permissible only if the cylinder is disconnected and removed from the heater. Cylinders must be stored outdoors out of the reach of children and must not be stored in a building, garage or any other enclosed area.
MAINTENANCE:
Always keep the heater area clear and free from combustible materials, gasoline and other flammable vapors and liquids. Keep the vent areas (slots in the bottom and the top at the front of heater) clear at all times.
Visually inspect the pilot flame and burner periodically during use. The pilot flame should be blue in color (not yellow) and will extend beyond the thermocouple. The flame will surround the thermocouple just below the tip, see Figure 3. A slight yellow flame may occur where the pilot flame and main burner flame meet. The burner(s) should be bright orange (with a slight blue color around the border, a
6Remove (3) screws attaching lower baffle to expose burner air openings.
7Inspect interior of casing assembly for accumulation of dust, lint or spider webs. If necessary, clean interior of casing assembly with a vacuum cleaner or apply air pressure (max. 30 psi). Do not damage any components within casing assembly when you are cleaning.
8Inspect and clean main burner orifice located at bottom of burner venturi tube, by using a vacuum or apply air pressure at orifice opening.
9Inspect and clean pilot (mounted to bracket) by using a vacuum or apply air pressure through the holes in the pilot indicated by the arrows in Figure 3.
WARNING: Never use needles, wires, or similar cylindri- cal objects to clean the pilot to avoid damaging the calibrated ruby that controls the gas flow.
10Apply air pressure (max. 30 psi) into ceramic tile of burner(s) assembly and the venturi tube (with [2] air openings) to remove dust, lint or spider webs.
11Reinstall lower baffle with (3) screws
12Slide back cover over (2) plastic hooks on top of heater. Make sure rear cover aligns with plastic side covers. Install (4) screws to hold in place.
Figure 3
accumulation of dust, lint or spider webs inside the casing assembly and main burner assembly. If the pilot is yellow or the burner has a noticeable flame, cleaning may be required. Use the following procedure to inspect the casing assembly and main burner assembly.
It is necessary to periodically check the burner(s) orifice and burner venturi tube to make sure they are clear of insects/nests or spider webs that may accumulate over time. A clogged tube can lead to a fire.
1Allow heater to thoroughly cool before performing any maintenance.
2Remove disposable 1 lb. cylinder(s) from heater or turn OFF gas supply at remote cylinder valve, and disconnect hose from heater.
3Remove wire guard from front of heater by gently bending to remove from holes in front cover.
4Remove (4) screws securing back cover to heater. Lift up slightly to release (2) plastic hooks on top of back cover.
5Remove back cover.
TROUBLESHOOTING INFORMATION:
If Spark electrode does not produce spark.
CHECK
•Spark electrode broken – replace.
•Igniter wire may not be attached to spark electrode – attach.
•Igniter wire damaged – replace.
•Piezo igniter on control valve defective – replace control valve.
If Spark electrode produces spark but pilot does not light.
CHECK
•No gas to heater – install disposable cylinder or connect hose and fuel filter then turn on valve at remote cylinder.
•“PILOT” position not properly aligned – turn gas control knob to “PILOT” position and depress.
•Pilot is blocked from spider web or dirt – clean pilot, see
MAINTENANCE.
If Pilot flame does not stay lit when knob is released.
CHECK
•Control knob in “PILOT” position not completely depressed or held in long enough to purge air from lines.
•Pilot flame not surrounding thermocouple – clean pilot, see MAINTENANCE.
•Pilot Assembly defective – replace.
•Tip switch wires disconnected – connect.
If Main burner(s) does not ignite.
CHECK
•Main burner(s) orifice is blocked – clean burner(s), see
MAINTENANCE.
If Heater keeps shutting “OFF” during normal operation.
CHECK
•Pilot is blocked – clean pilot, see MAINTENANCE.
•Provide minimum fresh air opening of 18 square inches (example 4 1/4” x 4 1/4” opening).
•Tip over switch activated from bumping heater.
Mr. Heater Big Buddy/Tough Buddy | 7 | Operating Instructions and Owner’s Manual | 05/06 | 78438CAL Rev. L1 |
