VNG/VLP SERIES PRESSURE WASHER
OPERATOR’S MANUAL
15
Pumps:
Use only SAE 30 weight non-detergent oil. Change oil af-
ter first 50 hours of use. Thereafter, change oil every three
months or at 500 hour intervals. Oil level should be checked
through use of the dipstick found on the top of the pump
or by the red dot visible through the oil gauge window. Oil
should be maintained at that level.
HEATING COIL
Condensation from Heating Coil
When cold water is being pumped into the water heater
coil, and the burner is on, condensation will form on the
coil and drip down into the burner compartment, giving
the appearance of a leaking coil, par ticularly on cold hu-
mid days.
To Check Water Heater Coil for Leaks:
With the main burner “OFF” start machine and allow it to
run a few minutes. Check into the burner compartment
with a drop light or flashlight. If no leaks are visible, then
water dripping from coil is from condensation.
Figure 6
Deliming Coil:
Periodic coil deliming is recommended.
1. Fill a container with 4 gallons of water, then add 1 lb.
of deliming powder. Mix thoroughly.
2. Remove nozzle from gun assembly and put gun into
container.
MAINTENANCE AND SERVICE
Spray Nozzles
Each unit is equipped with one or more spray nozzles,
depending on model. Different spray nozzles are calibrated
for each machine depending on the flow and pressure of
that particular model. Spray nozzles vary in bore size and
angle of spray. Popular spray angles are 0°, 15°, 25°, 40°.
When ordering, please specify size and angle of nozzle.
Nozzle size for each machine is located on the serial plate.
Unloader Valves:
Unloader valves relieve pressure in the line when a shut-
off gun is closed. Unloader valves are preset and tested
at the factory before shipping. Occasional adjustment of
the unloader may be necessary to maintain correct pres-
sure. (See section in manual on unloaders for correct pro-
cedure in adjusting valve.)
Winterizing Procedure:
Damage due to freezing is not covered by warranty. Ad-
here to the following cold weather procedures whenever
the washer must be stored or operated outdoors under
freezing conditions.
During winter months, when temperatures drop below 32°
F, protecting your machine against freezing is necessary.
Siphoning a small amount of antifreeze into the system is
recommended. This is done by pouring a 50:50 mix of
antifreeze and water into the float tank and then siphon-
ing 100% antifreeze through the chemical line with the
pump on. If compressed air is available, an air fitting can
be screwed into the float tank strainer fitting and by inject-
ing compressed air, all water will be blown out of the sys-
tem. The use of a draft diverter will prevent the wind chill
factor from freezing the coil.
Low Pressure Diagnosis
(Units with shut-off gun)
Refer to the Trouble Shooting Chart for low pressure. If by
referring to the chart, the trouble is found to be either the
unloader or the pump, your next step is to determine
whether, in fact, the unloader or the pump is the problem.
This can be done by eliminating the unloader from the
system and attaching a 50’ charge hose directly to the
pump. If high pressure is developed in this manner the
pump is good, and the unloader needs to be repaired or
replaced. If low pressure is still present the pump needs
repairing. CAUTION: When using this procedure to test
components, keep the shut-off gun open at all times.
High Limit Hot Water Thermostat:
For safety, each unit is equipped with a high limit control
switch. In the event the temperature of the water should
exceed its operating temperature, the high limit control
will turn the burner off until the water cools.
Control Knob
Regulator
Adjustment
Pilot
Adjustment
GAS VALVE
REGULATOR ADJUSTMENT
➤
Pressure
Tap Plug