SAMUEL JACKSON HO-1-114, Service Manual

Page: 16 / 36

PAGE 12 of 32 HO-1-1143 OIL-FIRED HEATER
© SAMUEL JACKSON, INCORPORATED, 2009 ALL RIGHTS RESERVED
Adjusting Fuel Pressure for Heat Output from Burner
After the burner motor is on, adjust the fuel pressure to the burner nozzle to give the
desired temperature without too much on/off burner cycling as the temperature goes
above and falls under the desired target temperature (set point) on the temperature
controller. A change in air volume through the heater or a change in ambient temperature
conditions may require fine tuning the fuel pressure after startup. Too high of fuel
pressure will increase cycling. Too little fuel flow will make achieving the target
temperature take longer or impossible.
For normal operation, do not adjust the fuel pressure below 100 PSI (6.9 bar) or above
200 PSI (13.8 bar). The burner is supplied with a 3.50 stamped (Part No. 23263) fuel
nozzle which will suffice for most operating ranges. Consult the factory if the desired
output cannot be obtained as other nozzles are available.
Oil pressure adjustment screw
on fuel pump. Use flat bladed
screwdriver.
Gage shows pressure of fuel to oil
nozzle. Normal range is 100 to 200
PSI (6.9 to 13.8 bar).