Kärcher HDS 3.9/30 Operator's Manual page 14

Kärcher ClearFire Oil Burner
Burner Air Adjustment: The oil burner on this machine
is preset for operation at altitudes below 500 feet. If
operated at higher altitudes, it may be necessary to
adjust the air band for a #1 or #2 smoke spot on the
Bacharach scale.
To adjust, start machine and turn burner ON. Loosen
two locking screws found on the air band and close air
band until black smoke appears from burner exhaust
vent. Note air band position. Next, slowly open the air
band until white smoke just starts to appear. Turn air
band halfway back to the previously noted position.
Tighten locking screws.
Burner Air Adjustment
Reference Numbers
Air Band Locking Screws
CAUTION: If white smoke appears from burner
exhaust vent during start-up or operation, discon-
tinue use and readjust air bands.
NOTE: If a fl ue is installed, have a professional service-
man adjust your burner for a #1 or #2 smoke spot on
the Bacharach scale. If the desired position cannot be
obtained using only the air shutter, lock the air shutter
in as close a position as can be obtained, then repeat
the above procedure on the air band setting.
Coil Removal:
Removal of coil because of freeze breakage, or to clean
soot from it can be done quickly and easily.
1. Disconnect hose from pump to inlet side of the coil.
2. Carefully disconnect the thermostat sensor mak ing
sure you do not crimp the capillary tube.
3. Remove burner assembly from combustion
cham ber.
4. Remove the 3-3/8" bolts from each side of coil and
tank assembly (these bolts are used to fasten tank
to chas sis).
5. Remove fittings connected to the 1/2" pipe
nipples from inlet and dis charge sides of coil.
14
MAINTENANCE
Air Band
HDS 600-606
6. Remove top tank wrap, bend back insulation tabs
and fold back blanket.
7. Remove bolts that hold down coil to bottom wrap.
8. Remove coil.
9. Replace or repair any insulation found to be torn
or broken.
10. Remove insulation retainer plates.
Coil Reinstallation:
Reinstall new or cleaned coil by reversing Steps 9
through 1.
• 9.800-080.0-AB