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VL SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
Two slotted and square headed adjustment screws
extend through the top of the switch case. A
pressure scale and indicating pointers are visible
through the sight glass window to indicate the
approximate pressure setting. The adjustment screw
directly above the right side pointer changes the
cut-out (off) set point and the adjustment screw
directly above the left side pointer changes cut-in
(on) set point. Adjust the screw to obtain the proper
cut-out (off) setting first, then adjust the other screw
to obtain the proper cut-in (on) setting. Turn the
screw clockwise to increase the pressure setting and
counterclockwise to decrease the pressure setting.
The pressure settings for each switch are listed
below.
BOILER PRESSURE SETTINGS (PSI)
CONTROL
VL
TYPE
MODELS
PS
With
AS
Compartment
Pressure
SS
Regulating Valve
MS
AS
With-Out
Compartment
SS
Pressure
Regulating Valve
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 receiving
power. If the solenoid valve is receiving power but
the valve is not opening, the coil may be
malfunctioning. Replace the solenoid valve and
check for proper operation. If the solenoid valve is
receiving power and the valve appears to be
opening but little or no water is flowing through it,
then the valve ports may be clogged with debris or a
valve component malfunctioning. To check solenoid
valve further, follow the procedure outlined below.
Disassembly
NOTE: It is recommended that the valve be
removed for cleaning as outlined in this procedure.
This will prevent damage to the lines and fittings
when the stem is removed from the body.
CYCLING
HIGH
LIMIT
ON
OFF
ON
OFF
9
11
6
15
4
6
2
15
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1.
Remove the coil assembly from the valve stem
by lifting up on the retaining cap at the top of
the solenoid valve and sliding 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 retightening.
4.
Remove the stem locking nut to remove the
stem from the valve body.
5.
All parts are now accessible for inspection and
cleaning.
NOTE: If internal solenoid parts appear to be
damaged or worn, then replace the solenoid valve.
Do not reuse damaged or worn parts. No internal
solenoid parts are available as a service
replacement.
A.
Check rubber seal on bottom of plunger.
B.
Check plunger spring.
C.
Check O-ring 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 regulating valve.
If the steamer is equipped with the compartment
pressure regulating valve and the steamer is
operating, set the pressure regulating valve to read
6 psi on the compartment gauge. 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
regulating 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.
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