BURST DISC TECHNOLOGY: This additional safety
feature functions to protect the coil & heating system
from the spikes of high pressure. If this component
ruptures, take the machine in to an authorized Hydro
Tek dealer. Do not plug off and continue to run.
CHEMICAL INJECTION SYSTEM: With an inlet
chemical injection system, the chemicals are
introduced at the inlet of the pump and controlled with
a chemical metering valve. The pump is fed by a float
tank to create a low vacuum, not to exceed negative
3psi, which draws up the chemical into the inlet
manifold of the pump, mixes it with water, and sprays it
out of the nozzle under high pressure. Open the
chemical valve only when the pickup tube is submersed
in a solution or air will enter the pump causing the pump
to lose pressure and run rough. Do not use highly
corrosive detergents or acid type cleaners. Be sure to
rinse and close the chemical valve after each use or the
chemical line and check valve may become obstructed.
Chemicals should be between 5-9 PH. Consult Hydro
Tek for chemical compatibility. Chemical abuse is not
covered under warranty.
An optional DOWNSTREAM INJECTOR is available if
harsh chemicals need to be applied. The downstream
injector will apply chemicals only at low pressure, by
installing black soap nozzle or opening spray wand
valve if equipped. If equipped standard with
downstream injection, adjust
concentration level by turning 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 to the
pump must be maintained 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 145°F. Do not restrict inlet
water supply. 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 ⅝” to ¾” I.D. hose.
Install a back flow preventer 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, if equipped, is
usually used to regulate the incoming water supply to
the pump and introduce chemicals into the inlet of the
pump. The float tank and filter (located inside the tank)
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
3psi. An 80 mesh, 200 micron strainer and a ¾” I.D. or
larger suction hose must be used to maintain a clean
and adequate water supply. Larger flow (8-10gpm)
machines require 1” feed and filtration. Be sure that the
water supply is free from air or damage to the pump
may result. Periodically you should clean out the
strainer and water supply tank to remove debris that
may accumulate on the bottom. If a water supply tank
and a float tank are both utilized, a special three way
valve can be used to switch between tanks.
USING DE-IONIZED OR SOFTENED WATER IN
YOUR PRESSURE WASHER: Do not use de-ionized
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:
HEAT EXCHANGER SYSTEM:
Spiralast™ Coil
The heat exchanger on diesel heated
units contains a continuous coil of pipe
which forms a cold water jacket
around the outside of the heating area and multiple
spiral wound layers to efficiently transfer heat to the
water inside the pipe. It is double wrapped with ceramic
blanket insulation and a stainless steel cover.
The outside of these coils can become covered with
soot if the burner is out of adjustment or if it is fired by
diesel fuel. This can be cleaned by removing both end
caps on the coil enclosure and brushing or spraying off
debris, or by adding a soot removal agent (Part
#CB200) to the diesel fuel. Both a diesel fuel pressure
gauge and smoke test device is required for proper
burner adjustment on diesel heated units, and must be
performed by a qualified technician.
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. To remove buildup
in the coil, use a scale remover (Part #CB100) available
at your authorized Hydro Tek dealer. Perform this
descaling service only when a noticeable pressure drop
is detected across the coil. Follow directions to avoid
damage. Wear safety glasses.
It is important to be sure you prevent your coil from
freezing or blockage caused by scale buildup or ice as
this is excluded from your warranty. Ice can exert
extreme pressure from the inside of the coil pipe and
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