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VL SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
C.
Gas burner ports clogged or obstruction
around air shutter. After a period of time,
gas burners can accumulate carbon in
their ports or become clogged by food and
grease debris from kitchen cleaning,
restricting performance. To clean burners,
remove them from burner box and boil in
water for 10 -15 minutes to dislodge clog.
Clean-out any remaining debris from the
gas ports using a wire brush, scribe or pic
type metal instrument. Remove any other
foreign objects that appear to be
obstructing the gas ports or air shutters.
D.
Gas orifice clogged or obstructed around
air shutter. It is possible for debris to
become lodged in the small gas orifice
opening over time. Clean-out the gas
orifice using a round metal instrument of
the same hole diameter or slightly smaller.
Clean as needed. If clogging reappears,
the orifice should be removed, cleaned
and reinstalled. Remove any other foreign
objects that appear to be obstructing the
gas orifice or air shutters.
3.
Electric Models
A.
One or more electric heating elements
malfunctioning. See "HEATING
ELEMENTS"
B.
One or more heater contactors not pulling
in to power heating elements.
C.
If steamer operates under three phase
power, then check line for all phases.
D.
Heavy scale build up on heating element
causes reduced heating.
4.
Direct Steam Models
A.
Building steam supply pressure low.
B.
Cooking compartment steam solenoid
valve malfunction.
C.
Steam pressure regulator adjusted too
low.
D.
Clogging in the steam line reduces steam
supply.
5.
Regenerated (Steam Coil) Steamers
A.
Heavy scale build up inside copper steam
coil.
B.
Building steam supply pressure low
C.
Cooking compartment steam solenoid
valve malfunction.
INLET WATER STRAINER
The in-line Y strainer should be located upstream of
the fill valve solenoid. Shut off the water supply.
Unscrew the cap from the body on the leg of the Y
that should be pointing downwards toward the floor.
Remove the screen and any foreign particles
trapped in the opening. Rinse the screen thoroughly
to remove accumulated debris and replace the
screen in the valve body. If screen can not be
thoroughly cleaned, replace it with a new one.
Reinstall the cap and ensure that the Y strainer is
positioned with the cap pointing downward to catch
debris.
The pressure regulating valve strainer will become
clogged if dirty steam lines are connected to direct
steam models. Remove the hex nut on the bottom
of the pressure regulating valve to clean the strainer
and valve seat.
PILOT AND THERMOCOUPLE
ASSEMBLY (GAS MODELS)
WARNING: DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AT THE MAIN
CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT
BOX INDICATING THE CIRCUIT IS BEING
SERVICED.
WARNING: SHUT OFF THE GAS BEFORE
SERVICING THE UNIT.
The pilot thermocouple when heated, supplies a DC
millivolt signal to an internal solenoid valve on the
gas combination control valve. This solenoid valve
is designed to shut off the gas flow to the pilot and
main burners in case of a malfunction in the system.
When energized by the thermocouple voltage, the
valve is held in the open position to permit gas flow.
The pilot burner flame is controlled by an adjustable
needle valve located under a small cap screw on
the combination control valve.
When experiencing pilot outages, visually check
pilot flame for the proper contact on thermocouple
and the flame color. Also, check to see that
excessive air drafts are not interfering with proper
heating of the thermocouple by the pilot flame.
The pilot flame should be a steady blue flame that
envelopes the thermocouple tip. The flame should
be about one inch long with half its length extending
beyond the outer edges of the pilot shield. If the pilot
flame does not appear to be this length and color,
then adjust as necessary. See the diagram below for
an example of unsatisfactory pilot flames. Turn
clockwise to decrease pilot flame and
counterclockwise to increase.
Page 29 of 88
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