Hydro Tek HG SERIES, Operation & Maintenance Manual

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10 SYSTEM INFORMATION
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. 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.
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 spray wand. As you back away the spraying nozzle from
the surface, the spray impact will decrease.
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
interchanged 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.
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 tem-
perature 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. Hose reels are
available for convenient and quick storage of both discharge
and inlet hoses. To keep the hose from unreeling, lock the
drum in place and secure the gun or the end of the hose or
it may drag on the road. If the reel begins to leak, replace
the seal kit in the swivel, or connect the hose directly to the
machine until the leak is repaired.The high pressure hose
should be completely unreeled before use or it can contract
on the drum and cause damage to the hose reel. The low
pressure hose should be of sufficient quality that it will not
flatten out when reeled up, or the supply of water to the
machine will be cut off.
WARNING: Replace discharge
hose with original equipment hose rated for 250°F available at
Hydro Tek dealer.
HYDRO TWISTER (OPTIONAL)
The Hydro Twister is a surface cleaner that connects to a
pressure washer and uses two nozzles rotating at a high RPM
within 1" of the ground. It can clean concrete up to 10 times the
speed of an operator using a wand, and with more consistency
and less operator fatigue. The Hydro Twister can be used with
up to 4000PSI, 10 gallons per minute, and up to 250ºF. The 17"
diameter Hydro Twister is designed for use in confined areas and
the 27" for large expanses of concrete or decks. An adjustable
pressure knob is included for use in sensitive areas. Instructions:
To set clearance on the seal in the swivel, remove top allen head
plug; with flat head screw driver turn in screw until it bottoms
out then back off screw 1/8 turn. The spray nozzles in the Hydro
Twister will have to be sized according to the output of your
machine.