Beckett CF500 Manuel D’Utilisation

13

the control will lock out. Press the reset button to reset the 
control and return to the functions listed in the previous 
step.
Repeat the previous steps if needed, until the pump is 
fully primed and the oil is free of bubbles. Then terminate 
the call for heat, and the control will resume normal 
operation.    

 

 

 

 

Any time the motor is running, press and hold  the reset 
button to disable the burner. The burner will remain off as 
long as the button is held and will return to standby when 
released.

 

 

While the burner is fi ring, and after the ignition has been 
turned off, press and release the reset button (hold 1/2 sec-
ond or less) to check the cad cell resistance. The LED will 
fl ash 1 to 4 times, depending on the cad cell resistance 
(refer to the table below). 

1

Strong (0 to 400) 

2

Normal (400 to 800)

3

Weak (800 to 1600)

4

Poor (1600 or higher)*

On

Flame sensed 

Off

Flame not sensed

Flashing (1/2 sec off - 1/2 

sec on)

Lockout/Restricted 

Lockout

Flashing (2 sec off - 2 sec 

on)

Recycle

Set combustion using instruments

   

Allow the burner to run for approximately 5 to 10 minutes.
Set the stack or over-fi re draft to the level specifi ed by the 
appliance manufacturer.

Natural Draft Applications; typically over-fi re draft 
is -0.01” or   -0.02” w.c. 
Direct Venting; typically may not require draft adjust-
ment.
High Effi ciency/Positive  Pressure Appliances; also 
vary from traditional appliances (see manufacturer’s 
recommendations).

Follow these four steps to properly adjust the burner:

y

y

y

‰

1.
2.

y

y

y

3.

Step 1:  Adjust the air shutter/band until a trace of smoke 

is achieved.  

Step 2:  At the trace of smoke level, measure the CO

2

 

(or O

2

) . This is the vital reference point for further 

adjustments.  Example: 13.5% CO

2

 

(2.6% O

2

)

Step 3:  Increase the air to reduce the CO

2

 by 1.5 to 

2 percentage points. (O

2

 will be increased by 

approximately 2.0 to 2.7 percentage points.) 

 

 

Example: Reduce CO

2

 from 13.5% to 11.5% (2.6% 

to 5.3% O

2

).  

Step 4:  Recheck smoke level. It should be Zero.

This procedure provides a margin of reserve air 
to accommodate variable conditions.
If the draft level has changed, recheck the 
smoke and CO

2

 (or O

2

) levels and readjust the 

burner, if necessary

Once combustion is set, tighten all fasteners on air band, air 
shutter and escutcheon plate.

Start and stop the burner several times to ensure satisfactory 
operation. Test the primary control and all other appliance 
safety controls to verify that they function according to the 
manufacturer’s specifi cations.

Check the breech draft pressure against the appliance man-
ufacturer’s recommended setting (typically + 0.1” W.C.). If 
the breech pressure is higher or lower than recommended 
level, adjust the appliance breech damper to achieve the 
specifi ed setting.  Recheck the smoke and CO

2

 (or O

2

) levels.  

Adjust burner air if necessary.

y

y

4.

5.

6.