Instructions / Assembly

25
24 volts supplied to gas valve during ignition but no
main gas fl ow.
• Gas valve may be defective. Replace if necessary.
• Gas piping may be plugged. Check for adequate gas
supply to gas valve at union.
Main fl ame ignites but burner locks out.
• Ignition control is not properly grounded.
WARNING:
When replacing the ignition control, replacement
control must have the safety lockout time.
FAILURE TO FOLLOW THIS WARNING MAY
RESULT IN AN EXPLOSION.
• Defective ignition control.
• Improper gas pressure or burner air adjustment is not
allowing fl ame to contact ignitor tip for fl ame proving
rectifi cation.
Burner operates, insuffi cient heat
• Check the thermostat for proper setting and location.
• Check for clean air fi lters and proper air fl ow.
• Check burner for proper gas fi ring rate.
• Verify unit is not undersized for its thermal load.
• Check thermostat anticipator. (0.9 amps)
Burner does not shut off.
NOTE: Burner will stop when the door switch is open.
With the door open, secure the door switch in the closed
position by depressing the switch. The means for securing
the door switch must be removed once this testing has
been completed.
• Disconnect the thermostat wires from TT connections
on the burner junction box. If the burner shuts off, check
for:
— Short circuit in the thermostat wires.
— Defective thermostat.
Burner has fl ame but motor isn’t running
• Gas valve stuck in open position.
— Replace the control.
— Burner and heat exchanger may need cleaning.
Noisy fi re
• Re-adjust combustion air to reduce volume of air being
drawn into the burner. See Adjusting the Burner (page
21) for fl ame adjustment.
Circulation blower will not operate even though the
burner operates.
• Turn on the manual blower switch, if the blower operates,
check the fan switch.
• Check the wiring to the motor.
• Check for a burned out motor.
PO Oil Furnace
Honeywell R7184 or Beckett 7505 controls only.
Burner does not start with a call for heat.
1. Check the electrical supply to furnace.
2. Verify the furnace door switch is in the on position.
3. Check line voltage (115 VAC) at the oil primary control.
4. Check indicator light with burner off, no call for heat
(fl ame). See Table 8 (page 26).
— If green LED indicator is on, the cad cell sees stray
light or the cad cell of controller is defective.
— If green LED indicator is off, go to step 5.
— If LED indicator is fl ashing (red or green light on
Beckett 7505 control), refer to step 1 below (Reset
primary control).
5. Jumper T to T terminals on primary control.
— If burner starts, check thermostat or limit wiring
connections.
— If burner does not start, turn off power. Check all
wiring connections.
— If burner does not start, replace primary control.
Burner starts & then locks out on safety with Honeywell
R7184 LED indicator fl ashing ½ second on, ½ second
off. For Beckett 7505 control, the red LED will fl ash.
1. Reset primary control: To reset the control from (soft)
lockout, the button needs only to be pressed and
released.
• R7184 control: If control is in restricted mode, press
and hold the button for 45 seconds - until the LED
fl ashes once.
• 7505 control: If control is in restricted mode, press
and hold the button in for 15 seconds until the red
turns off and the yellow LED turns on.
NOTE: Restricted Lockout: If the control locks out three
times in a row without a complete heat cycle between
attempts, the lockout becomes a restricted (hard) lockout.
2. If the LED indicator stops fl ashing and the ignition
remains off, the primary control could be defective.
If line voltage is present at the igniter terminals, and
there is no ignition, the igniter is likely defective and
needs to be replaced.
3. If the LED stops fl ashing, burner turns on, but the
control locks out again, check the cad cell. See step
5 below. If the cad cell is operational, replace the
primary control.
4. If the LED continues to fl ash at the interval listed
above, verify that the control is not in restricted mode.
If in restricted mode, reset it. If not in restricted mode,
replace the control.
5. If the (LED indicator for R7184 control; green LED for
7505 control) stays off while the fl ame is on, check
the cad cell sighting for view of the fl ame.
6. If the burner locks out, check the cad cell resistance.
See Table 9 (page 26).