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Start the burner and set combustion – Beckett FII 85 User Manual

Page 9

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RWB 6104 BAFII R01

Page 9

Start the Burner and Set Combustion

Figure 4. – Typical Wiring, R7184 Primary Control

SK9359

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 re-

turns the burner to standby.

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 estab-

lished, the ignition remains on for 10 seconds to

ensure fl ame stability before turning off. If the con-

trol is wired for 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 sati-

fi ed. The burner is then sent to burner motor off

delay, if applicable, or it is shut down and sent to

standby.

61351

Feature

Interrupted

ignition

Limited reset,

Limited recycle

Diagnostic LED,

cad cell indicator

Valve-on

delay

Burner motor

off delay

Alarm Con-

tacts

R7184A

YES

YES

YES

R7184B

YES

YES

YES

YES

R7184P

YES

YES

YES

YES

YES

Optional

Control System Features

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