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Hotsy 5645 • 97-6580 • Rev. 8/03
OPERATION
Before Starting
WARNING: Check hoses, fittings, wand, trigger gun
and fuel connections daily for signs of wear, cracks
and looseness, replace as required.
1. Read all manuals provided with this pressure washer.
Become familiar with location and function of all op-
erating and safety controls.
2. Connect the water supply hose to the float tank water
inlet (standard garden hose connector). The water
faucet and supply hose must be capable of providing
6.0 GPM.
3. Fill the burner fuel tank. Use kerosene, #1 grade home
heating oil, #1 or #2 diesel fuel.
DO NOT USE GASO-
LINE.
4. Fill the gasoline tank. Use lead free gasoline mini-
mum 86 octane.
DO NOT
use gasoline containing
more than 10% ethanol, 15% MTBE, or 5% metha-
nol.
5. Check pump and engine oil levels.
To adjust, start machine and turn burner ON (refer to
Operation
for details). Loosen two locking screws found
in the air shutter openings (refer to
Figure 6
) and close
air shutter until black smoke appears from burner exhaust
vent. Note air band position. Next, slowly open the air
shutter until white smoke just starts to appear. Turn air
shutter halfway back to the black smoke position
previously noted. Tighten locking screws.
A 1/2" NPT 3-way ball valve will need to be installed in
the water inlet line. Refer to
Figure 7.
Hotsy recommends
the use of Watts Regulator Valve #1/2 B6780 M1 (Hotsy
P/N 921363) for this application. With this valve in place
this machine will be capable of using both a pressurized
or gravity feed water supply without additional
modifications. For proper operation it is important that the
valve be fully open for its intended supply. This will prevent
air from being drawn into the system from the nonactive
source. Also the pressure supply must still be connected
to the float tank. The connection of a pressurized supply
directly to the 3-way valve will prevent detergent from
being drawn into the system.
Figure 7 - Gravity Tank Plumbing Connection
To Pump
Inlet
To Gravity Feed Tank
(Minimum 5/8" ID Hose
Maximum Length 10')
To Float
Tank
Float Valve
Inlet
3-Way Ball
Valve
If the desired position cannot be obtained using only the
air shutter, lock the air shutter in as close a position as
can be obtained, then repeat the above procedure on the
air band setting.
CAUTION: If white smoke appears from burner
exhaust vent during start-up or operation, discontinue
use and readjust air bands.
NOTE: If a flue is installed, have a professional ser-
viceman adjust your burner for a #1 or #2 smoke spot
on the Bacharach scale.
For additional burner component information, see
Figure 16
. It is recommended that the oil burner be
serviced yearly or as needed. Contact your local service
center.
Gasoline Engine
This gasoline engine is preset for operation at altitudes
below 3000 feet above sea level. If operated at higher
altitudes, it may be necessary to install a high altitude
main jet in the carburetor. Contact an authorized engine
sales and service center for details.
Water Supply
This machine is designed to be connected to a
pressurized (20 to 100 PSI) water supply, capable of
maintaining a minimum of 6.0 GPM. If it is necessary to
use a gravity feed water tank, the following plumbing
modifications will be required.
Figure 6 - Burner Air Band Adjustment
Air Band
Air
Adjustment
Locking
Screw
Fuel
Pump
