13
Operations
The air band required adjustment to 1.8” opening and
fuel pressure lowered to 150 PSI for a high altitude
adjustment for both heat input adjustments and
combustion air intake with the same fuel type.
Fuel Pressure 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
temperatures, 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.
Electrode Setting
Burner Nozzle
Keep the tip free of surface deposits by wiping it with a
clean, solvent-saturated cloth, being careful not to plug
or enlarge the nozzle. For maximum efficiency, replace
the nozzle each season.
Gun Setting Instructions
For EHASR Only
SR-Series gage KNA Part
Number 8.717-379.0
CAUTION: If white smoke appears from burner
exhaust vent during start-up or operation, discon-
tinue use and readjust air bands.
ATTENTION: Si de la fumée blanche s'échappe de
l'évacuation du brûleur pendant le démarrage ou le
fonctionnement, cesser d'utiliser et réajuster les
bandes d'air.
NOTE: If a flue is installed, have a professional
serviceman adjust your burner for a #1 or #2 smoke
spot on the Bacharach scale.
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 pressur-
ized (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.
Hotsy Gas Belt Drive Series Operator’s Manual 8.931-236.0 - BD
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