Vulcan-Hart VL3GSS Boiler User Manual


 
VL SERIES STEAMERS - GENERAL
Pa
g
e 10 of 88
4. Prevent
A. Set the timer to the desired cookin
g
time.
The timer must be set past five minutes to
chan
g
e the state of the timer control
micro switch contacts.
B. Pull the steam control arm handle forward
and lock it by pullin
g
the handle down.
This opens the steam inlet
g
ate valve,
allowin
g
steam to enter the compartment.
C. Press the compartment power switch to
supply power to the compartment controls.
The prevent compartment controls feature
load compensated cook times by utilizin
g
a thermal switch. With this feature, when
the compartment temperature reaches
180°F (the temperature at which
preheatin
g
or defrostin
g
is complete) the
red li
g
ht will come on and the timer will
start. For a small food load, the delay time
before the timer starts mi
g
ht be a minute
or less. For a lar
g
e food load, the delay
time could be four and five minutes.
Durin
g
preheat, the steam exhaust
solenoid valve (N.O.) is open to allow the
full free ventin
g
of cooler air and
condensate from the compartment. When
the temperature reaches 180°F, the
exhaust solenoid valve is ener
g
ized and
closes. The compartment should then
pressurize to 6 psi.
D. Approximately one minute before timer
reaches zero the steam control solenoid is
ener
g
ized to unlatch the steam control
arm. An internal sprin
g
will automatically
pull the arm to the rear. This closes the
steam inlet
g
ate valve and opens the
steam exhaust
g
ate valve, allowin
g
steam
and pressure to exit the compartment.
When the timer reaches "0" the red li
g
ht
shuts off and a buzzer sounds indicatin
g
the end of the cook cycle. Turn the
compartment power switch OFF to silence
the buzzer and remove power from the
compartment controls.
E. Turn the screw handle on the
compartment door counterclockwise
until
the
g
asket no lon
g
er seals a
g
ainst the
compartment surface. After the remainin
g
steam escapes, move the latch paddle to
the left and open the door.