Typical Burner Sequence Of Operation - R7184P Control - Beckett CF375 User Manual

Section: Wire the Burner

Typical Burner Sequence of Operation - R7184P Control.

Refer to the appliance manufacturer's wiring diagram for actual specifi cations.
2
8
1. 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.
2. VALVE-ON DELAY. The ignition and motor are turned
on for a 15 second valve-on delay.
3. TRIAL FOR IGNITION (TFI). The fuel valve is opened.
A fl ame should be established within the 15 second
lockout time.
4. 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.
5. IGNITION CARRYOVER. Once fl ame is established,
the ignition remains on for 10 seconds to ensure fl ame
stability before turning off. If the control is wired for
Table 4 - Control System Features
Control
Interrupted
Model
ignition
R7505A YES
R7505B YES
R7505P YES
R7184A YES
R7184B YES
R7184P YES
14
1
3
Valve-on delay
5
Ignition carryover
6
Motor-off delay
Limited reset,
Limited recycle
YES
YES
YES
YES
YES
YES
Standby
4
Trial for
ignition
7
Run
intermittent duty ignition, the ignition unit stays on the
entire time the motor is running.
6. RUN. The burner runs until the call for heat is satifi ed.
The burner is then sent to burner motor off delay, if
applicable, or it is shut down and sent to standby.
7. 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 above
ignition sequence. If fl ame is lost three times in a row,
the control locks out to prevent cycling with repetitious
fl ame loss due to poor combustion.
8. BURNER MOTOR-OFF DELAY. The fuel valve is
closed and the burner motor is kept on for the selected
motor-off delay time before the control returns the
burner to standby.
Features
Valve-on
delay
—
YES
YES
—
YES
YES
Lockout
Recycle
Burner motor
off delay Contacts
—
—
YES
—
—
YES
Alarm
Optional
Optional
Optional
—
—
Optional