VL SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
Pa
e 34 of 88
7. Once the correct pressure has been set, turn
the power switch OFF, replace the adjustment
screw cap and 1/8 inch NPT plu
(pressure tap)
on the outlet side of the valve.
8. Check for proper operation.
DIRECT STEAM MODELS
These models consist of a pressure re
ulator and
au
e that run off a buildin
s potable steam supply.
The re
ulator used will be of the adjustable type and
should be set for a dischar
e pressure of 10 psi. The
maximum input pressure to the re
ulator should be
15 psi. Incomin
power (120VAC) for the
compartment controls is supplied from a junction
box in the base.
REGENERATED STEAM
(OLDER MODELS)
The steam coils on a re
enerated type steamer are
intended for use at a steam supply pressure of 15
psi maximum. A pressure re
ulatin
valve is
available as optional equipment for steamers where
a buildin
s steam supply pressure exceeds 15 psi.
The re
ulator used will be of the adjustable type and
should be set for a dischar
e pressure hi
h enou
h
for
ood steam
eneration. This pressure can be
monitored by the supplied pressure
au
e. The
re
ulator should be set, only when steam is flowin
(steam solenoid valve is open). If steam is heavy
with condensate, install a ball float trap in the steam
line before the pressure re
ulatin
valve.
WARNING:
SHUT OFF THE STEAM SUPPLY
BEFORE SERVICING THE UNIT.
To remove a steam coil, disconnect union in steam
supply line to the coils and in the condensate
dischar
e line from the coils. Remove header that
supplies steam to coils by disconnectin
union at
each coil. In same way, remove coil condensate
collection header. Remove four bolts clampin
each
coil flan
e in place and pull coil forward. Use a new
flan
e
asket when replacin
coil. The faces that
mate with
asket must be clean.
Turn steamer power switch ON, allowin
steam
eneration and, consequently, pressure to rise to
normal operatin
level and then turn power switch
OFF for a final pur
in
of boiler and steam supply
lines. Steamer is now ready for use.
HEATER CONTACTORS
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.
The contactor can be serviced by removin
the
cover of the contactor box.
A noisy contactor (hum or chatter) is
enerally due
to excessive dust or dirt on the armature pole faces
or around the armature core preventin
the ma
net
coil from pullin
the armature into a completely
sealed position. This can usually be corrected by
blowin
or wipin
the pole faces clean. To inspect
electrical contacts, remove cover at top of contactor
by removin
two screws which hold it in place.
Replace contactor if the electrical contacts appear
to be severely pitted or burned.
HEATING ELEMENTS
WARNING:
THE FOLLOWING STEPS REQUIRE
POWER TO BE APPLIED TO THE UNIT DURING
THE TEST. USE EXTREME CAUTION AT ALL
TIMES.
1. Measure the volta
e at the heatin
element
terminals and verify it a
ainst the data plate
volta
e.
A. If volta
e is incorrect, find the source of
the problem.
B. If volta
e is correct, check current draw
(amps) throu
h the heatin
element lead
wires.
See table below for proper
values.
C. If current draw is correct then heatin
element is ok.
D. If current draw is not correct then replace
the element and proceed to step 3.
NOTE:
When replacin
an element, always use a
new
asket and ensure that the flan
e and tube
surfaces which contact the
asket are clean. If
removed element shows a pronounced scale
build-up on its heatin
tubes, the other elements
should be removed and mechanically cleaned to
remove the scale. This will prolon
their life. DO
NOT immerse elements in a chemical solution to
descale.
2. Check for proper operation.
