Wayne EHASR-DC Manual page 8

PROBLEM
BURNER WILL NOT
LIGHT
(continued)
BURNER WILL LIGHT,
BUT NOT STAY LIT
DURING CALL FOR HEAT
BURNER SMOKES
POSSIBLE CAUSE
Little or no fuel pressure from fuel pump
Air bubble in pump
Flex-coupling slipping on fuel pump
shaft or burner motor shaft
Fuel not reaching combustion chamber
Clogged burner nozzle
Low voltage at burner wire leads
Fuel solenoid malfunction
Bad connection between drop-out timer
and ignition device
Drop-out timer sees light in combustion
chamber
Faulty drop-out timer
Faulty burner ignition device
Disconnected or short in electrical wiring
Oil primary control sees light during
safety check and remains in standby
mode (Applicable only if burner comes
with oil primary control).
Oil gun depth spaced too far ahead
causing electrodes to short to ground
through air cone.
Heavy sooting on burner electrodes,
and air cone causing a weak arc
between the electrodes.
Oil primary control goes into nuisance
lockout (Applicable only if burner comes
with oil primary control).
Improper fuel or water in fuel
Improper air adjustment
Increase fuel pressure to manufacturer's specifications. See
Figure 25 on page 36 for pump features. Check that the
plastic coupler (see Figure 1 on page 13, item 13) is not
slipping on pump shaft, replace as needed and/or replace
pump.
Bleed pump (see page 31 for instructions) and check all fuel
lines for air leaks, replace lines as needed. See Figure 25 on
page 36 for pump features.
Replace as needed. See Figure 1 on page 13, Item 13.
Check fuel system for proper flow going through the burner.
Replace. See page 23 for instructions.
Check for proper 13.5Vdc going to the burner
Replace as needed. See Figure 1 on page 13 for
replacement part.
All wire contacts should be clean and tight. No breaks in wire
insulation, replace as needed. See page 23 for wire size
recommendations.
Disconnect cad cell and test ignition device for proper arc
between contacts.
Bypass drop-out timer in the circuit and test for proper arc
between contacts. If arc is present replace drop-out timer.
See Figure 1 on page 13 for replacement part number.
Test ignition device for proper arc between contacts. Replace
as needed. See Figure 1 on page 13 for replacement part.
All wire contacts should be clean and tight. No breaks in wire
insulation, replace as needed. See page 23 for wire size
recommendations.
Remove power from white command wire for 2 seconds on
Wayne 12Vdc oil primary control. Identify control model
number and observe burner sequence of operations. If burner
remains on standby see Burner does not light, Wayne
control remains on standby, on page 10.
Identify burner model and position oil gun depth according to
Figure 17 on page 28 and Figure 18 on page 29. See page
28 for instructions.
Clean as required. Check ceramic for any chips and cracks
that could affect arc between the electrodes, replace as
required. See Table 2 on page 15 for replacement parts.
Remove power from white command wire for 2 seconds on
Wayne 12Vdc oil primary control, observe burner sequence
of operations. If burner locks out again see Burner Will
Light, But Will Not Stay Lit During "Call For Heat", on
page 11.
Drain tank and replace contaminated fuel.
See page 30 for air band adjustment on burner assembly
8
SOLUTION