Operating instructions

10 SYSTEM INFORMATION
The FUEL SOLENOID is an electric fuel valve which shuts off
the fuel whenever the trigger on the spray gun is released or if
the set temperature on the heat switch is exceeded.
The IGNITION TRANSFORMER provides
a high voltage spark which travels down the
electrodes to ignite the diesel fuel. Disconnect all
power before servicing.
The 12 VOLT BURNER operates from the battery on the SS/
SM Series. The engine has a 15 to 16 amp charging system which
keeps the battery charged which runs the burner. The burner
motor and transformer stops when the trigger gun is released and
is controlled through a high amperage contactor. It's best to
release the trigger gun periodically, and also cool down the burner
before shutting off the engine to keep the battery fully charged.
Shut off burner & engine switch when unattended. Replace 12
VDC battery regularly (2 year maximum interval) on 12V
burner systems to help ensure consistent performance.
PRESSURE DELIVERY SYSTEM:
TRIGGER GUNS: The trigger gun is merely a valve that turns
water spray on and off. If it begins to leak or fails to shut off,
replace or repair the valve assembly. Never lock the gun in
the on position or point it at any person or any part of the
body. Machines that spray steam
only are equipped with an
open gun that does not shut off the water spray.
SPRAY WAND: Wands are available in 2 to 6 foot
lengths for various cleaning applications. If the unit is
equipped with a dual wand you can adjust the pressure by
turning the knob on the valve to divert part of the water
through the low pressure nozzle.
NOZZLES: The spray nozzle is a precisely machined orifice
made of hardened stainless steel. The orifice size is matched to the
output of your machine to attain the proper flow and pressure that
your machine was designed for. The orifice or, hole, of the nozzle
will begin to get larger as the nozzle becomes worn. For optimum
performance, replace the spray nozzle to maintain the full output
pressure of your machine. The nozzle installed in your machine
from the factory is designed to allow only about 90% of the water
being pumped to discharge out of the nozzle. The remaining 10% is
bypassed back into the inlet water supply by the unloader/regulator
valve.
BF025
BF015
typically set at 100 PSI but can be turned as high as 140 PSI during
the winter when the incoming water temperature is lower.
Before adjusting the fuel pressure, connect a fuel pressure gauge
and an outlet water temperature gauge, turn the pump and burner
on, and turn the fuel pressure screw clockwise until the desired
water temperature is obtained. Be sure not to exceed the
recommended specifications of the machine.
The FUEL FILTER will need to be replaced often if the
diesel fuel quality is poor. A fuel filter with a water separator is
recommended if the fuel quality is consistently poor.
The nozzle is usually connected to the wand with a quick
coupler. Be sure the collar on the quick coupler snaps back
to the locked position, or the nozzle could be lost when the
trigger on the spray gun is squeezed. Never connect the
spray nozzle directly to the trigger gun without a wand or
injury could result. Never place hands or fingers over the
nozzle tip.
The nozzles generally come in four different spray angles, 0º,
15º, 25° and 40º. The different spray angles of a given size of
nozzle do not change the output pressure of the machine, just the
impact force and surface coverage of the water spray.
The 0º nozzle sprays a straight stream which impacts the
surface very hard but does not cover a very wide area. Use the
0º nozzle with care because it can damage the surface you are
spraying with its high impact and long reaching spray.
The 15º nozzle sprays out a flat stream at a 15º width. It gives
you less impact power but covers a wider area with one pass of
The 25° is wider than the 15° and is most commonly used to
indicate the steam nozzle
The steam nozzles are sized to spray less water than the
other high pressure nozzles, so the water is discharged at a
higher temperature. (Up to 250º F).
The 40º nozzle spreads the water stream over an even wider
area to give you less impact for delicate surfaces.
Some machines come with one 15º nozzle which covers most
cleaning applications. Additional nozzles can be added and
fitted with quick couplers so that the nozzles can be inter-
changed for various applications.
TURBO NOZZLE (OPTIONAL)
The turbo nozzle multiplies the power of
your machine by rotating the spray jet and making the water
impact the surface harder to give better cleaning results.Simply
replace the spray nozzle with the turbo nozzle and squeeze the
trigger on the spray gun with the burner off for high pressure
spray. Do not point the turbo nozzle upward when starting.
"Turbo Laser" type nozzles cannot be used with water over
190º or life of the turbo nozzle will be greatly decreased and the
warranty voided. The "Rotomax" type nozzle can be used up
to 170º F.
WARNING: Replace discharge hose with origi-
nal equipment hose rated for 250°F available at Hydro Tek
dealer
EXTENSION HOSES AND HOSE REELS(OPTIONAL)
The high pressure discharge hose can be extended by
connecting additional hose lengths by means of twist cou-
plers. Hose extensions generally come in 50 and 100 foot
lengths. Specify maximum pressure and temperature of
your machine when ordering.
Low pressure inlet garden hose is available in 50 and 100
foot lengths. Premium quality, 200 PSI rated hose is
recommended to be used and is available at your local
dealer.
If an incorrect nozzle size is used the maximum flow and pressure
of the machine cannot be achieved and the pressure unloader valve
can wear prematurely. When replacing the nozzle match to one
size under the flow and pressure output of the pump.
BF020