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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. The ignition and motor are turned
on for a 15 second valve-on delay.
TRIAL FOR IGNITION (TFI). The fuel valve is opened.
A fl ame should be established 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.
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
1.
2.
3.
4.
5.
Typical Burner Sequence of Operation - R7184P Control.
Refer to the appliance manufacturer’s wiring diagram for actual specifi cations.
Control
Model
Features
Interrupted
ignition
Limited reset,
Limited recycle
Valve-on
delay
Burner motor
off delay
Alarm
Contacts
R7505A YES YES — — Optional
R7505B YES YES YES — Optional
R7505P YES YES YES YES Optional
R7184A YES YES — — —
R7184B YES YES YES — —
R7184P YES YES YES YES Optional
Table 6 - Control System Features
Section: Wire the Burner
intermittent duty ignition, the ignition unit stays on the
entire time the motor is running.
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.
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.
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.
6.
7.
8.
2
1
3
5
6
8
4
7
Standby
Motor-off delay
Valve-on delay
Trial for
ignition
Ignition carryover
Run
Lockout
Recycle