Adams Condensing Oil-Fired Furnace - Manual (Page 21)

Table
1 System and General Troubleshooting
PROBLEM POSSIBLE CAUSE REMEDY
Thermostat not calling for heat. Check thenrrastat and adjust. Be sure it Is accurate. If it Is mercury type be sure It
kk leuel
No power to furnace. Check furnace switch and main electrical parrel furnace fuse or circuit breaker.
Thermostat faulty. Remove thermostat wires from the oil primary control terminal T-T. Put a jumper
acroes T-T. if furrtace starts, replace thermostat, thermostat sub-base or both.
Funwc« will not start on primary corrtrol faulty. Check reset button on oil primary control. Remove thermostat wire from оИ primary
control terminal T1 -T2. Check for 24 v. across T-T. If mo voltege is present, check
tor 115
V.
to oil primary. If 115v. is present go t о primary control diagrwstics.
Cad ceH wiring shorted or room light
leaking into cad cell compartment.
Check cad ceil wiiir^ for short circuits. Check for room light leaking Into cad ceil
compartment.. Repair light leak if necessary.
Open safety switch Check for open high Umit, auxiliary limit, pressure or door Irrterlock swttch.
No Fuel oil СГюск fuel oil supply. Check that ak hand operated fuel oil valves are In the open
роаШоп. FIN oil storage tank if necessary.
Clogged nozzle. Replace nozzle with high quality reptacement. Use rating plate or Tables to
Appendix A as a guide.
Fumac« will not start Clogged oil filter. Replace oil tank tiller or in-line fitter if used.
wfttmut first pustilng oil
prfcnary confab reset
button.
Low oil pump pressure. Connect pressure gauge to oil pump. Adjust pump pressure, or replace ok pump if
necessary. Ensure that erratic pressure readings are not caused by defective fuel
oil line.
(Occurs ttequently)
Air getting into hiet oil tines, or fuel oil
line dirty, dogged, or In some
manner defedive.
Check fuel ok lines. Replace any compression fittings found with high quality flared
fittings. Check for any signs of oil leaks. Any oli leak is a potential source of air or
contaminants.
Defective burner mctor. Check burner motor. If bunrer motor is cutting out on over-toad, determine why.
Replace If necessary.
Cad cell is dirty or defective If cad cell Is dirty, dean It. (D^ermlne why cad cell» getting dirty). If cad cell is
poorly aimed, realign it. NOTE: The photocell should have a resistance of 100K
ohtTB in absence of light, a rrMwmum of ISOOohms in the presence of light-
Eneure that room light Is not leaking into the ced cell compartment. (See diagnostic
l№ section).
No fuel oil. Chedt fuel ok supply. Chedr that dl hand c^terated fuel di valves are to the c^ien
poeitton. Fill ok storage tank if necessary.
Furnace starts, but
shuts off requiring
manually res^rtg the
Clogged nozzle. Replace nozzle with high quality replacement. Use rating plate or Tades in
Appendix A as a guide.
primary control reset
button.
Clogged oU filter. Replace dl tank ruter or in-ltoe filter if used.
Low oil pump pressure. Connect pressure gauge to dl pump. Adjust pump pressure, or replace dl pump if
necessary. Ensure that erratic pressure readings are not caused by defective fuel
oil line.
Air getting Into fuel oil lines, or fuel oil
line dirty, clogged, or in some
manner defective.
Check fuel dl lines. Replace any compression fittings found with high quality flared
fittings. Checkforany signs ofok lealre. Any oil leak is a potential source of air or
contaminants.
Defective burner motor. Check burner rrwtor. If burner rrxitor Is cutting out on over-load, determine why.
Replace if necessary.
Water or contamlnaiits in ok. Drain fuel di storage tank «к1 replace tool di. (Consult with fuel dl supplier).
Frozen oil line. Gently warm dl kne. Insulate dl line. (Outdoor piping size may require Increased
diameter).
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