Hydro Tek HG SERIES, Operation & Maintenance Manual

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8 SYSTEM INFORMATION
of anti-seize and use service removable "lock tight" on mounting
bolts.
BELT DRIVE: Check belt condition, alignment and
tension periodically. Replace belts when they show signs of
wear or cracking. Tighten belts by loosening the mounting bolts
on the pump and generator to permit them to slide. Turn the
horizontal rail adjusting bolts to tighten belts until they deflect ¼"
to ½" inch with finger pressure.
GENERATOR:
Some self-contained Hot Water Units are equipped with a
115 volt generator to power the diesel burner. The generator
output voltage must be between 110 to 130 Volts, (or between
59 to 63hz), when the unit is under full load. If the generator
voltage falls out of this range the RPM
of the engine will need to be adjusted to
proper speed. If the engine cannot
maintain the proper RPM do not use
the burner or any power from the
generator until the engine is repaired.
A switch/circuit breaker will need to be
reset if the circuit is overloaded.
To extend generator life make sure the
burner is off when the engine is started or
stopped. Keep generator dry. Do not spray off with trigger
gun.
If unit is equipped with auxiliary generator power outlets,
they are located on the back of the electrical box. Do not
plug in accessories over 1200 watts or 10 amps.
PUMPING SYSTEM:
PUMP: The pump is a positive displacement, oil bath
crankcase, triplex plunger type. It contains 3 plungers which
move forward and backward in a cylinder to propel water past
3 inlet valves and 3 discharge valves into a high pressure
manifold.
The crankcase oil window or dip stick should be checked
for oil level and clarity. Check the pump for oil or water
leaks before each use.
The sight window is located at the rear
(opposite the head) of the pump and should be filled to the red dot
with AR recommended oil, or Cat Pump recommended
oil available at your Hydro Tek dealer. Wobble plate
pumps use synthetic oil which only needs to be changed
if the oil becomes contaminated. If the
oil becomes milky in color, moisture is
entering the crankcase. Change the oil
and contact your authorized Hydro
Tek dealer if the problem persists.
To increase pump life, prevent cavitation (air bubbles),
overheating, and dirty water. Cavitation can be prevented by
keeping filters clean and checking for air in pump
feed lines. Do not run the pump in the bypass
mode (pump running with the trigger gun off), for
a period of more than 5 minutes or the pump will
begin to overheat (maximum water temperature
is 145ºF). Do not run pump dry. Protect from freezing. Do
not run a frozen pump until it is completely thawed.
UNLOADER AND PRESSURE RELIEF VALVE: The
unloader valve is preset at the factory to govern the proper
output pressure of your machine. It will release
the pressure of the pump output back into the
inlet if the trigger on the spray gun is released.
NEVER increase the set pressure on the un-
loader to exceed the specifications for your
machine. The unloader should be adjusted only by qualified
personnel.
All hot water machines are equipped with a SAFETY
PRESSURE RELIEF VALVE. In the unlikely event that
your unloader fails, or if the burner overheats and builds
excessive pressure, the pressure relief valve will vent the
pressure into the atmosphere. If this occurs, turn off the
machine and have it checked by an authorized dealer. The
pressure relief valve will automatically reset itself.
BURST DISK TECHNOLOGY: This additional safety
feature functions to protect the coil and other components
from overpressurizing from the heating system and high
system spikes of pressure. If this component ruptures, you
should take the machine in to an authorized Hydro Tek
dealer. Do not plug off and continue to run.
An optional DOWNSTREAM
INJECTOR is available if harsh chemi-
cals need to be applied. The down-
stream injector will apply chemicals only
at low pressure. If equipped standard
with downstream injection, adjust con-
centration 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 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 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 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