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Model 3VH22
Dayton Operating Instructions and Parts Manual
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Operation
Review and
understand the
warnings in the General Safety Infor-
mation Section. They are needed to
safely operate this heater. Follow all
local codes when using this heater.
TO START HEATER
1. Follow all installation, ventilation, and
safety information.
2. Locate heater on stable and level
surface. Make sure strong drafts do
not blow on heater.
3. Make sure unit is turned off by lightly
depressing and turning control knob
fully clockwise to OFF.
4. Open propane supply valve on propane
tank(s) slowly.
NOTE: If not opened slowly, excess-flow
check valve on propane tank may stop gas
flow. If this happens, you may hear a click
inside the regulator assembly. This is the
check valve closing. To reset the excess
flow check valve, close propane supply
valve and open it again slowly.
5. Slightly depress and turn control knob
counterclockwise to the low position
(See Figure 5).
6. With the control knob pushed all the
way in, press and release the piezo
ignitor button. Keep pressing ignitor
button until the burner lights. Hold
control knob down for a maximum of
15 seconds while attempting ignition.
If heater does not ignite, release
control knob and wait 3 minutes
before attempting reignition.
NOTE: Keep hands and face away from
outlet (around top of shell) of heater while
attempting to start heater.
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Off
Position
Low
Position
Piezo Ignitor
Button
Control
Knob
Figure 5 - Control Knob, and Piezo Ignitor
Button Locations
FLAME PATTERNS
Figure 6 shows a correct flame pattern.
The burner flame is mostly blue with a
slight yellow coloring on the ends.
Figure 7 shows an incorrect flame pattern.
The flame is mostly yellow. The incorrect
flame pattern results from low gas
pressure or from flashback.
Running heater
below specified
input rating may cause flashback.
During flashback, the burner flame is
mostly yellow. The flame will burn
inside the burner tube, causing a
roaring noise. If flashback occurs, turn
heater off. After burner tube cools,
restart the heater.
Slight Yellow
Coloring on
Flame Ends
Blue Flame
Burner
Tube
Figure 6 - Normal Flame Pattern at High Position
7. After ignition, hold control knob down
for approximately 30 seconds. This
activates the automatic control system.
8. When burner remains lit, set heater at
the desired heat level by slightly
depressing the control knob and
turning counterclockwise to the
Medium or High settings (see Figure 5).
9. If burner goes out, turn off gas.
Slightly depress and turn control knob
fully clockwise to OFF. Check fuel
supply. If adequate fuel is available,
restart heater beginning at Step #1.
Correct Flame Pattern