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VL BOILER BASE SERIES CONVECTION STEAMERS - SERVICE PROCEDURES AND ADJUSTMENTS
D.
If the cooking cycle is started normally, but
the red light and timer do not come on or an
abnormal amount of time elapses before
they come on, then the load compensator is
set too high. Also, if the timer stops, the red
light goes out, and the buzzer does not
sound after the compartment has exhausted
the steam or if the time is set as usual for the
product and the product is overcooked or if
the time is set as usual for the product and
the product is overcooked, then the load
compensator is set too high.
E.
If there is too short a time between starting
and the red light coming on, or if it comes on
immediately, the load compensator is set
too low. Also, if the time is set as usual for
the product and the product is undercooked,
then the load compensator is set too low.
WATER LEVEL GAUGE ASSEMBLY
CERTAIN PROCEDURES IN THIS
SECTION REQUIRES ELECTRICAL
TEST OR MEASUREMENTS WHILE
POWER IS APPLIED TO THE
MACHINE. EXERCISE EXTREME
CAUTION AT ALL TIMES. IF TEST
POINTS ARE NOT EASILY
ACCESSIBLE, DISCONNECT
POWER, ATTACH TEST
EQUIPMENT AND REAPPLY
POWER TO TEST.
1.
Close the valve at the top and at the bottom of
the gauge assembly.
2.
Unscrew the packing nuts at the top and bottom
of the glass tube.
3.
Slide the glass tube upwards, until the bottom of
the tube is clear of the fitting and lift it out.
4.
Reinstall the tube and use new sealing washers.
Do not over tighten the packing nuts, it could
break the gauge glass.
5.
Open the top and bottom valves fully.
6.
Check for proper operation.
STEAM GATE VALVE(S)
On all models, each cooking compartment has its own
mechanical steam gate valve that supplies steam to
the cooking compartment when the steam control arm
handle is pulled forward. The Prevent models use a
solenoid valve to exhaust steam from the
compartment whereas the Automatic, Standard and
Manual models use an additional steam gate valve to
exhaust steam when the steam control arm handle is
returned to the rear. These gate valves are a standard
type and can be disassembled for cleaning and gasket
replacement.
If steam leaks are noticed around the packing nut and
stem during cooking, tighten the packing nut until the
steam leak ceases. Release steam control arm to
ensure its automatic return. If arm does not return
freely or steam is still leaking, then further inspection
or adjustments are necessary. Turn the timer and
compartment power switch OFF and blowdown the
boiler. Remove the control arm bracket and packing
nut from the stem and clean out the old string packing.
The valve stems may then be repacked using a string
packing suitable for steam service.
Replace the packing nut and control arm bracket.
Tighten the packing nut finger-tight plus ½ turn and
check for proper operation. If steam continues to leak,
tighten the packing nut in additional ½ turn increments
until it stops and recheck operation of the steam
control arm.
NOTE: Do not overtighten packing glands, the linkage
system must be free enough for the spring to return
the steam control arm to the fully closed position.
For other service to these valves, remove the stem
assembly and cap at the top of the valve. Check the
valve linkage for loose or binding parts.
The steam gate valve linkage for these controls is
simple and its function easily seen. The inlet and
exhaust steam gate valves must be positioned so the
Page 41 of 93
CERTAIN PROCEDURES IN THIS
SECTION REQUIRES ELECTRICAL
TEST OR MEASUREMENTS WHILE
POWER IS APPLIED TO THE
MACHINE. EXERCISE EXTREME
CAUTION AT ALL TIMES. IF TEST
POINTS ARE NOT EASILY
ACCESSIBLE, DISCONNECT
POWER, ATTACH TEST
EQUIPMENT AND REAPPLY
POWER TO TEST.
F24650 Rev. A (1017)
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