Wayne EH - Burner will Light, but will Not Stay Lit During Call for Heat

11
BURNER WILL LIGHT, BUT WILL NOT STAY LIT DURING “CALL FOR HEAT”
Procedure
Status
Corrective Actions
1. Check limit switches
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2. Check for line voltage at
the oil primary control
(120 volts)
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3. Check R7284G or
R8184G indicator light,
(LED Screen if R7284P
control) with burner on,
call for heat.
R7284 or R8184 control is in
lockout. The R7284G &
R8184G control LED flashes for
½ seconds ON, ½ seconds
OFF. The R7284P control reads
“Lockout Mode”
 Control is sensing bad flame signal, cad cell or
controller is defective, sees external light or
connections are shorted. Go to step 5.
The R7284P display reads
“Valve on Delay”
 Go to step 4.
4. Applications with “valve
on delay”, verify that oil
valve is closed during
the “valve on delay”
period by opening view
port and verifying that
no flame is present
during 15 second “valve
on delay”
R7284P display still reads
“Valve on Delay”
 If flame is present, replace valve.
5. Jumper oil primary T-T
terminals
Burner starts, and stays
running.
 Trouble is in thermostat or limit circuit.
Burner starts, but doesn’t stay
running.
 Disconnect line voltage and open thermostat or
limit switch.
 Check all wiring connections
 If burner does not stay running, go to step 6
6. Check that nozzle size
is per appliance
manufacturer
recommendation
Burner nozzle incorrect.
 Change nozzle and fuel pressure to factory settings
and retest, if burner doesn’t stay lit go to step 7
Burner nozzle correct
 Go to step 7
7. Check burner air band
setting is set up per
manufacturer
recommendation
Burner air band setting too low.
 Could cause black puff of smoke on ignition if the
fuel-air mixture is too rich.
 Use a combustion test kit to measure the CO
2
%
and smoke spot in the exhaust.
 Adjust air band opening until CO
2
% measures
between 10-12 %, and smoke spot is a 1 or less.
 If problem persists go to step 8
Burner air band setting too high
 Could cause delayed ignition on start-up if the fuel-
air mixture is too lean.
 Use a combustion test kit to measure the CO
2
%
and smoke spot in the exhaust.
 Adjust air band opening until CO
2
% measures
between 10-12 %, and smoke spot is a 1 or less.
 If problem persists go to step 8
Burner air band set at
manufacturers
recommendations
 Go to step 8