PRESSURE ADJUSTMENT AND
GAUGE READING
Before using the cleaning system, the oper-
ating pressure must be set. The cleaning
system is equipped with a pressure gauge
for setting and monitoring system pressure.
To set or adjust
pressure, rotate the
unloader adjustment
knob, marked “PSI”
on the top of the
case clockwise to
increase pressure
and counterclock-
wise to decrease
pressure. Make all
adjustments with the gun off (trigger
released). Adjust unloader 1/2 turn, squeeze
trigger and read pressure. If operating pres-
sure has not been reached, repeat until
desired pressure is reached. Do not exceed
the maximum operating pressure listed in
specifications. Be certain to use only the
Vari-Nozzle provided with cleaning system or
replacement nozzle sized for the flow and
pressure of unit.
Check your gauge while setting pressure
and periodically during operation. Changes
in pressure will warn you of wear or improper
operating conditions. If maximum pressure
cannot be reached or pressure drops after
prolonged use, it is most likely due to a worn
nozzle or lack of sufficient inlet water to the
unit. Consult “TROUBLESHOOTING” or call
your local service center.
When unit is running but in by-pass (gun off,
trigger released) pressure should drop to
approximately 100 PSI. If the pressure read-
ing on the gauge does not drop, trigger gun
several times and check reading. If pressure
still has not dropped shut the unit off and con-
sult “TROUBLESHOOTING”. For safety and
optimum life, operation in by-pass should not
exceed 6 minutes.The cleaning system is
equipped with an internal by-pass hose and
Thermo Valve. The Thermo Valve will sense
the rise in fluid temperature as a result of run-
ning the unit in by-pass and bleed a small
amount of heated water from the bottom of
the case. Cool inlet water will fill the line and
protect the pump from overheating.
Prolonged operation in by-pass at high
pressure may result in damage to the pump
or the unloader. Turn system “OFF” during
prolonged periods of nonuse.
VARI-NOZZLE ADJUSTMENT
This unit is equipped with a multi-function
nozzle. The Vari-Nozzle changes from high
pressure (back position) to low pressure
(forward position) with an easy push-pull
motion. Changing from high to low pressure
permits the the low pressure adjustable chemi-
cal injector to begin drawing chemical into the
system. When chemical is no longer needed,
return to high pressure (back position). The
Vari-Nozzle will also rotate right to left to adjust
from a 0° to 60° spray angle for desired clean-
ing needs. Make high to low pressure adjust-
ments with gun off or trigger released.
▲ WARNING ▲
Do not place hand
over end of nozzle
while spraying or
adjusting nozzle.
8
OPERATION
CAUTION
The maximum operating pressure of your
cleaning system has been secured at the
factory with a Locking Collar. Tampering or
removal of the Locking Collar on the
unloader valve will VOID THE WARRANTY.
!!
HIGH
PRESSURE
LOW
PRESSURE
WIDE
SPRAY
NARROW
SPRAY
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