HOT WATER PRESSURE WASHER
OPERATOR’S MANUAL
11
97-6131, 97-6140 • Rev. 3/04
5. If water is known to be high in mineral content, use a
water softener on your water system, or de-scale as
needed.
6. Do not allow acidic, caustic or abrasive fluids to be
pumped through the system.
7. Always use high grade quality cleaning products.
8. Never run attached pressure washer pump dry for
extended periods of time.
9. If machine is operated with smoky or eye burning
exhaust, coils will soot up, preventing water from
reaching maximum operating temperature. (See sec-
tion on Maintenance and Service).
10. Never allow water to be sprayed on or near the motor
or burner assembly or any electrical component.
11. Delime coils as per instructions.
It is advisable, periodically, to visually inspect the burner.
Check air inlet to make sure it is not clogged or blocked.
Wipe off any oil spills and keep equipment clean and
dry.
The areas around the pressure washer should be kept
clean and free of combustible materials, gasoline and
other flammable vapors and liquids.
The flow of ventilating air to the burner must not be blocked
or obstructed in any manner.
MAINTENANCE AND SERVICE
Unloader Valves:
Unloader valves trap pressure in the line when a shut-off
spray gun is closed. Machines with unloader valves are
preset and tested at the factory before shipping. Occa-
sional adjustment of the unloader may be necessary to
maintain correct pressure.
Winterizing Procedure:
Damage due to freezing is not covered by warranty. Ad-
here to the following cold weather procedures whenever
the washer must be stored or operated outdoors under
freezing conditions.
During winter months, when temperatures drop below
32°F, protecting your machine against freezing is nec-
essary. Store the machine in a heated room. If this is not
possible then mix a 50/50 solution of anti-freeze/water
or windshield washer fluid with water in a 5 gallon bucket.
Place a short section of garden hose into the bucket and
connect it to the machine. Elevate the bucket and turn
the pump on to siphon the anti-freeze through the ma-
chine. If compressed air is available, an air fitting can be
screwed into the inlet connector and by injecting com-
pressed air, all water will be blown out of the system.
If you have an optional float tank, pour the antifreeze
into this tank and run machine until antifreeze exits dis-
charge nipple.
High Limit Hot Water Thermostat:
For safety, each machine is equipped with a high limit
control switch. In the event the temperature of the water
should exceed its operating temperature, the high limit
control will turn the burner off until the water cools.
Pumps:
Use only SAE 30 weight non-detergent oil. Change oil
after first 50 hours of use. Thereafter, change oil every
three months or at 500 hour intervals. Oil level should be
checked by using the dipstick found on the top of the
pump or by the red dot visible through the oil gauge win-
dow. Oil should be maintained at that level.
Cleaning of Coils:
In alkaline water areas, lime deposits can accumulate
rapidly inside the coil pipes. This growth is increased by
the extreme heat build up in the coil. The best prevention
for liming conditions is to use high quality cleaning de-
tergents. In areas where alkaline water is an extreme
problem, periodic use of deliming powder will remove lime
and other deposits before coil becomes plugged.
Deliming Coils With A Pressure Washer:
Periodic flushing of coils is recommended.
Step 1 Fill a 5 gallon bucket with 4 gallons of water,
then add 1 lb. of deliming powder. Mix thoroughly.
Step 2 Remove the high pressure nozzle from the pres-
sure wand and put the wand into the bucket. Se-
cure the trigger on the spray gun into the open
position.
Step 3 Attach a short section (3-5 ft.) of garden hose to
the attached pressure washer to siphon solu-
tion from the elevated bucket. Start up pressure
washer, allowing solution to be pumped through
pressure washer and into HPB coils and back
into the bucket. Solution should be allowed to
circulate 2-4 hours.
Step 4 After circulating solution flush entire system with
fresh water.
Removal of Soot In Heating Coil:
In the heating process, fuel residue in the form of soot
deposits may develop between the heating coil pipe and
block air flow which will affect burner combustion. When
soot has been detected on visual observation, the soot
on the coil must be washed off after coil has been re-
moved using the following steps:
1. Remove the tank head assembly by unscrewing the
three tek screws and lifting the tank head off.
2. Remove the two pipe nipples and associated fittings.
3. Lift the coil out of the outer wrap.