Operating instructions

will apply chemicals only at low pressure. If equipped standard
with downstream injection, adjust concentration level by turn-
ing brass collar on the injector, or the knob on pump or control
panel. Read and follow all safety instructions on the detergent
label.
WATER SUPPLY: An adequate water supply must be
maintained to the pump at all times. If the inlet flow is too low
or if there is air in the water supply, the pump will run rough,
pulsate and lose pressure. Maximum inlet water temperature
is 145ºF. If the pump is run dry, it can quickly overheat.
The water is filtered by a garden hose adapter screen.
Clean and replace as required or install a large capacity
strainer to insure a clean supply of water.
DIRECT WATER FEED: Maintain an inlet water pressure
between 25 PSI and 60 PSI using a ¾" I.D. hose. Install a back
flow valve on your supply hose if State or Local ordinances require
it. Install a water regulator if your water pressure exceeds 60 PSI.
FLOAT TANK WATER FEED: A
float tank is used on some models to
regulate the incoming water supply to
the pump and introduce chemicals into
the inlet of the pump.
The float tank and filter should be
flushed out if debris accumulates in the bottom. If the
float tank overflows or runs out of water, adjust or
replace the float valve inside the tank and check the inlet
water feed pressure.
BULK TANK WATER SUPPLY:
Large capacity water supply tanks
can be used with most units if water
is not readily available at the washing
site. Belt driven, low speed pumps
(less than 1750 RPM) can draw from
a tank if you ensure that the vacuum
does not exceed negative 4 psi. A
75 mesh strainer and a ¾" I.D. or larger suction hose
must be used to maintain a clean and adequate water
supply. 8-10 gpm machines require 1" feed & filtration.
Be sure that there is no air in the water
supply or damage to the pump could result.
Clean out the water supply tank if debris
accumulates on the bottom and rinse out the
strainer periodically. If a water supply tank and a float
tank are both utilized, a special three way valve can be
used to switch the tanks. Water supply tanks can be filled
from a garden hose or large line filled from a hydrant with
the proper permits. Filter the water from the hydrant with a
200 mesh filter on the fill line.
WATER TREATMENT: The inlet
water can be deionized for spot free
rinse or softened to make detergents
clean more effectively. Do not use deionized water through
the coil on a hot water machine or coil corrosion will result.
Water softeners, however, will reduce coil scale deposits
and should be installed if your water is especially hard.
HEATING SYSTEM:
COIL/HEAT EXCHANGER SYSTEM: The heat ex-
changer contains a continuous coil of pipe
which forms a cold water jacket around the
outside of the heating area. It is double
wrapped with ceramic blanket insulation
and a stainless steel cover.
The inside of the coil assembly can become covered with
soot if it is fired with diesel fuel and the burner is out of
adjustment. This can be cleaned by removing both end caps
of the heat exchanger enclosure and brushing or spraying
off debris or by adding a soot removal agent (Part # CB200)
to the diesel fuel.
When the water is heated, scale (calcium) will begin to
form on the inside of the coil pipe depending upon
the hardness of the water in your area. The coil
can be DESCALED by using a scale remover
(Part # CB105) available at your authorized
Hydro Tek dealer. It is necessary to perform
this service only when a noticeable pressure drop is detected
across the coil. Follow directions to avoid damage. Wear
safety glasses.
TEMPERATURE SWITCH: The burner is equipped
with a high temperature limit switch which will shut off the
burner when the water temperature becomes too hot. Some
units come with an adjustable thermostat.
STEAM INSTRUCTIONS: If your unit is steam capable,
install the green steam nozzle, turn thermostat to 250° F.
PRESSURE/FLOW SWITCH: The burner is equipped
with either a pressure switch or a flow switch to control the
burner. When the trigger on the spray gun is squeezed, water
begins to move through the coil and pressurize. The flow/
pressure switch turns the burner on and begins to heat the
water. Whenever the water spray stops or if the water is shut
off, the burner will shut off.
WARNING: Burner should fire only when the trigger
is squeezed and spraying water, if it comes on at any other
time, shut off machine and have it serviced.
DIESEL FIRED BURNER: The diesel fired burner is a
forced draft pressure atomizing burner. Diesel fuel is sprayed
out of an atomizing nozzle, mixed with air, and
ignited by a high voltage spark. The flame is
directed towards the coils of pipe which, in turn,
heats the water flowing through it. Use clean
#2 DIESEL FUEL for the burner or substitute
#1 diesel, light fuel oil, or Kerosene if diesel is
not available.
AIR BAND adjustments may need to be made to compen-
sate for higher elevations, or if more than a trace of smoke is
observed in the burner exhaust. The ELECTRODES may
need to be cleaned and adjusted periodically. These adjust-
ments have to be made precisely and should be performed only
by qualified personnel. Set between #1 & #2 on smoke gauge.
The FUEL PUMP is a self priming, low volume pump which
is propelled by the burner motor. The fuel pump pressure is
SYSTEM INFORMATION 9