OPERATING INSTRUCTIONS
7
WASHING OPERATION &
TECHNIQUES
When washing always start from the bottom up, and do
the final rinse from the top down. This will keep the water from
streaking the surfaces that are being cleaned. When applying
chemicals, it is also best to start from the bottom and work up.
In areas where there is no grease or oil present, and the
dirt is loose, cold water will be sufficient. When it comes to
grease, oil, and hard to clean dirt, hot water and/or chemicals
can make the job easier, and speed up the cleaning process.
For applications that require even more heat and where water
use/runoff must be minimized, switch to the steam mode (if
equipped) and adjust the thermostat for up to 250º steam.
For general washing use a broad pattern spray nozzle
such as the 40 degree nozzle. Rinsing and delicate surface
washing is best performed by backing away from the surface
and using the broad spray nozzle. In areas where the cleaning
is more difficult and in smaller areas such as cracks and holes
use the narrow spray nozzles, 0 or 15 degree.
Chemicals can be applied in a couple of different ways. One
way is with a hand spray pump. The other is with the chemical
system on the equipment; either down stream or high pressure
depending on the system you have. When using the high
pressure (pump inlet) chemical system do not use any caustic
chemical as this may cause damage to the pump. For very
harsh chemicals it is best to use the hand sprayer. First wet
the surface and wash off heavy debris. Test the surface to be
sure the chemical won't harm it. Then apply the chemical & let
work for a couple of minutes for them to take affect before
rinsing. Do not allow chemicals to dry on the surface.
When rinsing off the chemicals always start from the top
down. When finished using the chemical be sure to rinse out
the chemical line and valve with fresh water to prevent
clogging.
SHUT DOWN:
1. Turn Burner switch to the off position.
2. Rinse and close Chemical Valve. Turn off Chemical Solenoid
Switch if equipped.
3. Squeeze the trigger on the Spray Gun until the water
becomes cool..
4. TURN MOTOR SWITCH OFF with the appropriate con-
trols.
5. Turn off water supply.
6. Squeeze trigger to release any trapped pressure in dis-
charge hose.
7. Turn gas valve off when not in use for an extended period.
8. DISCONNECT & STORE HOSES.
9. WINTERIZE: If not used in the winter, store in heated
space or antifreeze the unit. Run the machine until the float
tank is near empty, fill with a 50% mix of water and anti-
freeze and run until antifreeze appears at the high pressure
outlet. If unit is equipped with a blowout valve, it may be
blown out with compressed air in addition to using anti-
freeze solution. On direct feed units (no float tank), use a 5'
garden hose to draw the antifreeze mix from a bucket or
blow out the unit with compressed air until only air and no
water comes out of the discharge.
HN SERIES OPERATING
CONDITIONS
Heat rise will vary depending on inlet water temperature and
environmental conditions. Natural gas burners are preset from
the factory for an inlet water temperature of 60-70 degree F and
approximately 4" of water column natural gas pressure on the
outlet
of the gas valve for a 140 degree F heat rise. If the water
inlet temperature is 20 degree F colder than the factory setting
the heat rise will be approximately 6% less. Adjustments can
be made to the gas valve outlet pressure by a qualified gas
technician to increase the outlet gas pressure to 5" water
column with the use of a manometer to gain higher heat rise
and compensate for colder water inlet conditions if they
persist year round.
Inlet
gas pressure when measured while the burner is on with
a manometer placed right before the gas valve, needs to be
between 6 and 7" of water column natural gas pressure and
properly sized gas supply piping is required to achieve full
factory rated heat rise.
(See "INSTALLATION GUIDELINES"
include with this manual)
HL SERIES OPERATION
1. Connect power cord/GFCI to power supply.
2. Select spray nozzle, connect to spray wand and lock back
collar on quick connect.
3. Connect water supply garden hose (Minimum 35 PSI
required) turn water on.
4. Move L.P. tank off unit and away 10 feet. Open valve.
5. Turn pump switch on and pull trigger: Turn switch to burner
position and adjust thermostat for hot water cleaning.
6. For soap application: insert black soap nozzle in wand & pull
trigger to start soap flow.
7. To shut off unit, turn off burner/pilot switch. Close the
propane tank valve, pull trigger on gun until water is cool.
SHUT OFF BOTH SWITCHES WHEN UNATTENDED OR
WHEN REFUELING. UNIT MAY START AT ANY TIME.
Warning:
Cool down burner before shutting off pump
when in the steam or heating mode.
