15
Operations
Fuel Pressure Air Adjustment
To adjust fuel pressure, First install a pressure gage
into the port just after the pump fuel exit. Turn the
adjusting screw (located at the regulator port)
clockwise to increase, and counterclockwise to
decrease. Do not exceed 200 psi or lower the pressure
below 130 PSI, when checked at the post-pump
pressure port.
The fuel pressure may need to be adjusted due to
altitude. For every 500 ft altitude above sea level, the
boiling point of water goes down 1 °F. At high altitude
environments, this boiling point change may require the
heat input to be lowered so the water input does not
turn to steam earlier than at the factory settings and
activate the pressure sensors and pressure relief
equipment when the unit is operated and much higher
altitudes from factory settings or local dealer site
settings. Check with your dealer before making local
site fuel pressure adjustments.
Also, as ambient temperature changes seasonally, the
fuel temperature in the feed tank and air temperature
inlet can impact fuel flow. In more extreme tempera-
tures, this local-site adjustment may also require
different fuel nozzles for fuel inlet temperatures that are
at seasonal extremes (higher or lower) in locations
where the temperature changes are beyond moderate
temperatures of between 40°F and 90°F. Colder
temperatures will make for a thicker flow and less fine a
fuel spray while hotter temperatures will make for a
thinner flow a more fine spray with the same nozzle.
Consider alternate nozzle configurations from the
baseline factory-supplied nozzle for operating in such
temperature extremes if performance is not meeting
needs with air band and fuel pressure settings alone.
NOTE: When changing fuel pump, a by-pass plug
must be installed in return line port or fuel pump will
not prime.
Water Supply
Connect water supply hose to water inlet. The water
faucet and supply hose must be capable of providing a
minimum of 4.0 gallons per minute (GPM) and a
maximum pressure of 65 psi.
Electrical
WARNING: Make sure all switches and controls are
in the OFF position prior to connecting electrical
supply.
WARNING: DO NOT stand in water while
connecting and disconnecting electrical supply.
WARNING: Always disconnect power before
servicing your pressure washer.
IMPORTANT: Consult local building codes for exact
electrical requirements. Licensed contractors may
be required.
IMPORTANT: This machine must be electrically
grounded. LA MACHINE DOIT ÊTRE MISE À LA
TERRE.
Grounding Instructions
This product must be electrically grounded. If it should
malfunction or break down, grounding provides a path
of least resistance for electric current to reduce the risk
of electric shock. This product is equipped with a cord
having an equipment grounding conductor and a
grounding plug. The plug must be plugged into an
appropriate outlet that is properly installed and
grounded in accordance with all local codes and ordi-
nances.
DANGER: Improper connection of the equipment
grounding conductor can result in a risk of electro-
cution. Check with a qualified electrician or service
personnel if you are in doubt as to whether the
outlet is properly grounded.
DANGER: Do not modify the plug provided with the
product - if it will not fit the outlet, have a proper
outlet installed by a qualified electrician. DO NOT
use any type of adapter with this product.
Extension Cords:
The models 980SS and 1410SS
should not be used with extension cords. All other
models must be used only with UL listed extension
cords that are rated for the voltage and amperage
requirements of the machine. In no case should more
than one cord be used and cord length should be kept
to a minimum to reduce the risk of severe electrical
shock and/or damage to the machine.
WARNING: To reduce the risk of electrocution,
keep all connections dry and off the ground. DO
NOT touch plug with wet hands.
Hotsy 800 OIL FIRED OPERATOR’S 8.921-206.0 - B
