Service manual

11
Problem Possible Cause Possible Remedy
M. Burner Motor Operates 1. Oil level below intake line 1. Fill tank with oil and bleed air from the line.
but No Oil Delivered at Nozzle inside supply tank.
Oil-Fired Units 2. Clogged strainer. 2. Remove and clean strainer.
3. Clogged nozzle. 3. Remove and clean or replace nozzle.
4. Air leak in the intake line. 4. Tighten all fittings in the intake line. Tighten
unused intake port plug in the fuel unit.
If there are valves in the line, be sure the
valve stems are packed solid and tightened
securely.
5. Restricted intake lines. 5. Replace any kinked tubing and check all
(High Vacuum) valves in the intake line.
6. A two pipe system that 6. Insert by-pass plug if not in place. Prime pump.
becomes air bound.
7. A single pipe system that 7. See start-up procedure in Installation Manual.
becomes air bound.
8. Slipping or broken 8. Tighten or replace coupling.
coupling.
9. Frozen fuel unit shaft. 9. Return unit to factory.
10. Excessive vacuum. 10. Use next larger tubing size. Too high of a lift.
Also see M, 5.
11. Dirty oil filter cartridge. 11. Replace cartridge.
N. Burner Motor Operates,
Delivers Oil, but No Flame
Oil-Fired Units 1. No spark. 1. Check the ignition transformer and high
tension insulators.
2. Poor atomization of oil. 2. Adjust oil pressure to 100 psi, check for oil
line restriction and nozzle defects.
3. Improper electrode 3. Remove firing assembly and adjust.
setting.
4. Excessive combustion air. 4. See start-up procedure in Installation Manual.
P. No Gas or No Oil
Gas-Fired Units 1. Gas valve turned to OFF 1. Turn to ON position.
position or PILOT position.
2. Defective gas regulator. 2. Replace.
3. Incorrect pipe sizing. 3. Check pipe size.
4. Main valve to gas supply 4. Open main valve.
turned off.
5. Problem with propane 5. Check propane supply system.
supply system.
6. Propane tank incorrectly 6. Check tank size and capacity. Change tank
sized. or add vaporizer.
7. Inoperative or defective 7. Check controls and replace if necessary
automatic controls. See “Control Failure,” pages 6, 7, 8, 9.
Oil-Fired Units 1. Oil level below intake line 1. Fill tank with oil. (Bleed air from oil lines).
in supply tank.
2. Clogged strainer or filter. 2. Remove and clean strainer. Replace filter
element.
3. Clogged nozzle. 3. Replace nozzle.
4. Air leak in intake line. 4. Tighten all fittings in intake line. Tighten unused
intake port plug. Check filter cover and gasket.
5. Restricted intake line 5. Replace any kinked tubing and check any
(high vacuum reading). valves in intake line. Check for correct line sizes.
6. A two-pipe system that 6. Check for and insert by-pass plug. Make sure
becomes airbound. return line is below oil level in tank.
7. A single-pipe system that 7. Loosen gauge port plug or easy flow valve and
becomes airbound. bleed oil for 15 seconds after foam is gone in
bleed hose. Check intake line fittings for
tightness. Check all pump plugs for tightness.