VSX SERIES STEAMERS - OPERATION
Page 9 of 80
COOKING COMPARTMENT
CONTROLS
When the steam pressure in the cooking
compartment manifold reaches approximately 3 psi,
the cooking compartment pressure switch closes,
suppling power to the other controls. The ready
lights will illuminate and after approximately one
minute, the steam pressure in the boiler will reach
the upper limit of 10 psi. If the pressure drops below
approximately 3 psi, the pressure switch will open,
removing power from the cooking compartment
controls.
NOTE:
If a cooking timer is set immediately after
the ready light comes on, a loud clanking sound will
be heard (oil canning) and the ready lights will flash
for several seconds. This condition is caused by the
manifold pressure being on the “fringe” of the
pressure switch set point. When a cook timer is set,
the compartment steam solenoid valve opens
causing the manifold steam pressure to drop,
slightly below the pressure switch set point. At the
same time, steam pressure is still increasing in the
boiler. This opposing condition causes a pressure
“bounce” to occur but after the steam pressure
passes approximately 4 psi this condition subsides.
Under normal steam cycling pressures, this
condition will not be seen.
1. With both timer knobs at the off position, open
the compartment doors and observe that no
steam has entered the cooking compartments,
then close the doors.
2. Set both timer knobs at 2 minutes. The ready
lights will go off, the cooking lights will come
on, and steam will begin to enter the
compartments.
3. After one minute, open each door and observe
that steam has ceased to enter each
compartment, cooking lights go back to ready,
and one minute is remaining on each cook
timer.
4. Close doors and steam generation and cook
timing will resume. Observe the floor drain to
ensure that live steam from compartments is
being cooled by cold water from the cold water
condenser solenoid valve.
5. When timer knobs reach "0", buzzers will
sound, steam generation will cease, cooking
lights will go off and ready lights will come on.
To silence buzzers, turn timer knobs to off
position.
6. During a cooking cycle, the heating system will
cycle on and off as necessary to maintain
steam pressure in the boiler.
NOTE:
On direct steam units, no steam cycling will
occur due to the regulated constant steam supplied
from the building. Steam will come on for cooking
when a cook timer is set and go off at the end of
that time.
7. Turn power switch off to remove power from
the steamer and the red light will go out.
8. Blowdown boiler. See “BOILER BLOWDOWN
AND STEAMER SHUT-OFF” under
“STEAMER OPERATION”.
