Manual

14
Typical Burner Sequence of Operation -
Honeywell 7184
Standby — The burner is idle, waiting for a call for
heat. When a call for heat is initiated, there is a 3-10
second delay while the control performs a safe start
check.
Valve-on delay — As applicable, the ignition and
motor are turned on for a 15-second prepurge.
Trial for ignition (TFI) — The fuel valve is opened,
as applicable. A fl ame should be estalished within the
15-second lockout time.
Lockout — If fl ame is not sensed by the end of the
TFI, the control shuts down on safety lockout and must
be manually reset. If the control locks out three times
in a row, the control enters restricted lockout. Call a
qualifi ed service technician.
Ignition carryover — Once fl ame is established, the
ignition remains on for 10 seconds to ensure fl ame
stability. It then turns off.
Run — The burner runs until the call for heat is
satisfi ed. The burner is then sent to burner motor-off
delay, as applicable, or it is shut down and sent to
standby.
Recycle — If the fl ame is lost while the burner is fi ring,
the control shuts down the burner, enters a 60-second
recycle delay, and then repeats the ignition steps
outlined above. If the fl ame is lost three times in a
row, the control locks out to prevent continuous cycling
with repetitious fl ame loss caused by poor combustion.
Burner motor-off delay — If applicable, the fuel
valve is closed and the burner motor is kept on for the
selected postpurge time before the control returns the
burner to standby.
Cad Cell Resistance Indicator: During the burner
run state, click the reset button (less than 1 second)
1.
2.
3.
4.
5.
6.
7.
8.
to check the cad cell resistance range. The yellow
light will fl ash 1 to 4 times, depending on the
amount of light detected by the cad cell.
Restricted Lockout
If the control locks out three times in a row without a
complete heat cycle between attempts, the lockout
becomes restricted. A qualifi ed service technician should
be called to inspect the burner.
Wire the Burner (R7184)
Electrical Shock Hazard
Electrical shock can cause severe personal
injury or death.
Disconnect electrical power before installing or
servicing the burner.
Provide ground wiring to the burner, metal control
enclosures and accessories. (This may also be
required to aid proper control system operation)
Perform all wiring in compliance with the National
Electric Code ANSI/NFPA 70 (Canada CSA C22.1).
y
y
y
Section: Burner Controls
Standby
Trial for
Ignition
Ignition
Carryover
Run
Lockout
Recycle
Valve-on
Delay
Motor-off
Delay
(postpurge)
1
34
5
2
8
6
7
Figure 14 - Typical Burner Sequence of Operation - 7184
Install the burner and all wiring in accordance with the
National Electrical Code and all applicable local codes or
requirements.
Wire the burner in compliance with all instructions
provided by the appliance manufacturer. Verify operation
of all controls in accordance with the appliance
manufacturer’s guidelines.
See Figure 15 for a typical wiring diagram, with R7184
oil primary, for reference purposes only.