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Author Topic: Service Procedures for Oil Heating Equipment  (Read 3848 times)

Offline Icehouse

  • Technician
  • Member Since: Oct 2008
  • Posts: 569
    • hvacbob
Service Procedures for Oil Heating Equipment
« on: January 24, 2009, 07:34:22 PM »

Before performing any service or maintenance procedure, check with the customer and listen to any complaints. Make a note of any comment that would indicate a possible source of trouble or equipment malfunction. Then proceed as follows:

1.   Check the thermostat , blower compartment, and blower motor.
2.   Check the oil burner and controls.
a. With the switch turned off, check the wiring for tight connections.
b. Inspect the combustion chamber

1. Inspect the chamber with an inspection mirror and drop light.

2. Look for carbon build up, cracks in the chamber, corrosion of the                    burner head.

c. Check for soot in the heat exchanger.
1.   Remove flue pipe
2.    Use a drop light to check inside the heat exchanger for carbon build-up

d. Change the filter.

1. Close the oil supply valve and unscrew the filter bowl mounting screw. Gently pry the bowl loose and remove the filter. Place it in the waste oil container along with the oil in the filter bowl.

2. Clean the filter bowl with a clean rag.

3. Remove the ring gasket from the bowl, and wipe away any  residue.

4. Replace the the filter with a new one. Place a new ring gasket in the groove at the top of the filter bowl.

5. Install bowl with new filter and gasket and tighten the mounting screw. (caution, do not overtighten).

6. Turn on the fuel supply and bleed air  from the filter bowel through the bleed port. When oil starts to flow from bleed port, quickly tighten it. Check for leaks.


e. Check the piping

1.   Check the oil supply lines between the tank and burner for any dents, bends, kinks, loose connections. Look for any indication of leaks such as stains.

2.   Check the routing and support of fuel lines.

f. Service the burner.

1.   Turn off power

2.   Disconnect oil line from gun assembly

3.   Loosen transformer hold downs, raise transformer, remove gun assembly.

4.   Clean blower wheel with a brush.

5.   Clean the burner tube with a rag.

6.   Remove, clean, and inspect electrodes for cracks.

7.   Replace nozzle.

8.   Replace electrodes and adjust properly using feeler gauge.

9.   Check motor coupling for wear. Replace if necessary

10.   Replace gun assembly

11.    Check transformer for visable defects.

12.   Return transformer and secure.

13.    Re-connect oil line.

14.   Remove pump cover and replace strainer.

g. Perform a combustion efficiency  check.

1.   Make sure inspection door and blower door are closed properly.

2.   Operate burner for ten minutes

3.   Place draft gauge in breach.

4.   Record reading. Should be between 0.003 and 0.004, if not adjust barometric damper.

5.   Take a draft reading over fire (inspection door) a negative reading of between 0.002 and 0.004. Over 0.002 indicates a dirty heat exchanger.
NATE, NCCER, PHCC,HVAC Certified Instructor
Member RSES, US Army Refrigeration Specialist(Retired), Former Refrigeration Teacher NYC Board of Ed.
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