Operating instructions

9
Dayton Operating Instructions and Parts Manual
Models 6BY71, 6BY73 and 6BY74
8. When burner remains lit,
set heater at the desired
heat level by slightly
depressing the control
knob and turning it coun-
terclockwise to the MED or
HI settings (See Figure 10,
page 8).
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.
Always run heater
with control knob at
LO, MED or HI settings.
Never set control knob
between OFF, LO, MED
or HI settings as flash-
back may occur.
Operating Instructions
(Continued)
Slight
Yellow
Coloring
on
Flame
Ends
Burner
Tube
Blue Flame
Figure 11 - Correct Flame Pattern
at High Position
Yellow
Flame
Flame Inside Burner Tube
(makes roaring noise)
Blue Flame
Figure 12 - Incorrect Flame
Pattern During Flashback
TO STOP HEATER
1. Tightly close propane supply
valve on propane tank(s).
Allow heater to burn
remaining fuel in hose.
2. Shut off burner. Do this
by pushing in the control
knob and turning clock-
wise to the OFF position.
TO RESTART HEATER
1. Wait five minutes after
stopping heater.
2. Restart heater by following
To Start Heater, page 8.
(6BY74) 200,000 BTU/HR
HEATER
TO START HEATER
1. Before lighting pilot fully
close the ball valve (turn
knob fully clockwise).
2. Fully open the valve on the
propane cylinder and wait
15 seconds before pro-
ceeding to step 3.
3. Depress red button on
safety pilot valve admit-
ting gas to the heater.
Then push and release the
ignitor button until the
pilot lights.
4. When the pilot lights, con-
tinue to hold the button
depressed for 30 seconds,
then release.
Figure 13 - Starting Heater
[200,000 Btu/Hr Model (6BY74)]
Ignitor
Button
Ball Valve
Control Knob
Button
Safety Pilot
Valve
FLAME PATTERNS
Figure 11 shows a correct flame
pattern. The burner flame is
mostly blue with a slight yellow
coloring on the ends.
Figure 12 shows an incorrect
flame pattern. The flame is
mostly yellow. The incorrect
flame pattern results from low
gas pressure or from flashback.
Running heater
between settings 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.