VL SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
Pa
e 26 of 88
Two slotted and square headed adjustment screws
extend throu
h the top of the switch case. A
pressure scale and indicatin
pointers are visible
throu
h the si
ht
lass window to indicate the
approximate pressure settin
. The adjustment screw
directly above the ri
ht side pointer chan
es the
cut-out (off) set point and the adjustment screw
directly above the left
side pointer chan
es cut-in
(on) set point. Adjust the screw to obtain the proper
cut-out (off) settin
first, then adjust the other screw
to obtain the proper cut-in (on) settin
. Turn the
screw clockwise
to increase the pressure settin
and
counterclockwise
to decrease the pressure settin
.
The pressure settin
s for each switch are listed
below.
BOILER PRESSURE SETTINGS (PSI)
CONTROL
TYPE
VL
MODELS
CYCLING HIGH
LIMIT
ON OFF ON OFF
With
Compartment
Pressure
Regulating Valve
PS
911615
AS
SS
MS
With-Out
Compartment
Pressure
Regulating Valve
AS
46215SS
MS
FILL AND COLD WATER
SOLENOID VALVES
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.
Check to assure the solenoid valve is receivin
power. If the solenoid valve is receivin
power but
the valve is not openin
, the coil may be
malfunctionin
. Replace the solenoid valve and
check for proper operation. If the solenoid valve is
receivin
power and the valve appears to be
openin
but little or no water is flowin
throu
h it,
then the valve ports may be clo
ed with debris or a
valve component malfunctionin
. To check solenoid
valve further, follow the procedure outlined below.
Disassembly
NOTE:
It is recommended that the valve be
removed for cleanin
as outlined in this procedure.
This will prevent dama
e to the lines and fittin
s
when the stem is removed from the body.
1. Remove the coil assembly from the valve stem
by liftin
up on the retainin
cap at the top of
the solenoid valve and slidin
the metal cover
plate off.
2. Clamp the body of the valve in a vise.
3. Mark a scribe line on the stem nut to the valve
body for proper reti
htenin
.
4. Remove the stem lockin
nut to remove the
stem from the valve body.
5. All parts are now accessible for inspection and
cleanin
.
NOTE:
If internal solenoid parts appear to be
dama
ed or worn, then replace the solenoid valve.
Do not reuse dama
ed or worn parts. No internal
solenoid parts are available as a service
replacement.
A. Check rubber seal on bottom of plun
er.
B. Check plun
er sprin
.
C. Check O-rin
in valve body.
D. Check ports in valve body.
6. Reverse procedure to install.
COMPARTMENT PRESSURE
ADJUSTMENT
Remove the left side panel from the boiler base to
access the compartment pressure re
ulatin
valve.
If the steamer is equipped with the compartment
pressure re
ulatin
valve and the steamer is
operatin
, set the pressure re
ulatin
valve to read
6 psi on the compartment
au
e. Turn the hex head
screw at the top clockwise to increase the pressure
and counterclockwise to decrease. If the steamer is
not equipped with the compartment pressure
re
ulatin
valve, then the compartment will cycle at
the same pressures of the boiler. A mechanical
pressure relief valve serves as a safety backup
control and is pre-set for a maximum of 8 psi.
