VL SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
Pa
e 29 of 88
C. Gas burner ports clo
ed or obstruction
around air shutter. After a period of time,
as burners can accumulate carbon in
their ports or become clo
ed by food and
rease debris from kitchen cleanin
,
restrictin
performance. To clean burners,
remove them from burner box and boil in
water for 10 -15 minutes to dislod
e clo
.
Clean-out any remainin
debris from the
as ports usin
a wire brush, scribe or pic
type metal instrument. Remove any other
forei
n objects that appear to be
obstructin
the
as ports or air shutters.
D. Gas orifice clo
ed or obstructed around
air shutter. It is possible for debris to
become lod
ed in the small
as orifice
openin
over time. Clean-out the
as
orifice usin
a round metal instrument of
the same hole diameter or sli
htly smaller.
Clean as needed. If clo
in
reappears,
the orifice should be removed, cleaned
and reinstalled. Remove any other forei
n
objects that appear to be obstructin
the
as orifice or air shutters.
3. Electric Models
A. One or more electric heatin
elements
malfunctionin
. See “HEATING
ELEMENTS”
B. One or more heater contactors not pullin
in to power heatin
elements.
C. If steamer operates under three phase
power, then check line for all phases.
D. Heavy scale build up on heatin
element
causes reduced heatin
.
4. Direct Steam Models
A. Buildin
steam supply pressure low.
B. Cookin
compartment steam solenoid
valve malfunction.
C. Steam pressure re
ulator adjusted too
low.
D. Clo
in
in the steam line reduces steam
supply.
5. Regenerated (Steam Coil) Steamers
A. Heavy scale build up inside copper steam
coil.
B. Buildin
steam supply pressure low
C. Cookin
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 le
of the Y
that should be pointin
downwards toward the floor.
Remove the screen and any forei
n particles
trapped in the openin
. Rinse the screen thorou
hly
to remove accumulated debris and replace the
screen in the valve body. If screen can not be
thorou
hly cleaned, replace it with a new one.
Reinstall the cap and ensure that the Y strainer is
positioned with the cap pointin
downward to catch
debris.
The pressure re
ulatin
valve strainer will become
clo
ed if dirty steam lines are connected to direct
steam models. Remove the hex nut on the bottom
of the pressure re
ulatin
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 si
nal to an internal solenoid valve on the
as combination control valve. This solenoid valve
is desi
ned to shut off the
as flow to the pilot and
main burners in case of a malfunction in the system.
When ener
ized by the thermocouple volta
e, the
valve is held in the open position to permit
as flow.
The pilot burner flame is controlled by an adjustable
needle valve located under a small cap screw on
the combination control valve.
When experiencin
pilot outa
es, visually check
pilot flame for the proper contact on thermocouple
and the flame color. Also, check to see that
excessive air drafts are not interferin
with proper
heatin
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 lon
with half its len
th extendin
beyond the outer ed
es of the pilot shield. If the pilot
flame does not appear to be this len
th and color,
then adjust as necessary. See the dia
ram below for
an example of unsatisfactory pilot flames. Turn
clockwise
to decrease pilot flame and
counterclockwise
to increase.
