Beckett 800 manual Disable function, CAD cell resistance check, ‰ Set combustion using instruments

the control will lock out. Press the reset button to reset the control and return to the functions listed in the previous step.

yRepeat 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.

Disable function

yAny 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.

CAD cell resistance check

yWhile the burner is firing, 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 flash 1 to 4 times, depending on the cad cell resistance (refer to the table below).

Number of LED	Cad Cell Resistance (ohms)
flashes
1	Strong (0 to 400)
2	Normal (400 to 800)
3	Weak (800 to 1600)
4	Poor (1600 or higher)*
* Lockout is likely to occur.

LED Indicator	Status
On	Flame sensed
Off	Flame not sensed
Flashing (1/2 sec off - 1/2	Lockout/Restricted
sec on)	Lockout
Flashing (2 sec off - 2 sec	Recycle
on)

‰Set combustion using instruments

1.Allow the burner to run for approximately 5 to 10 minutes.

2.Set the stack or over-fire draft to the level specified by the

appliance manufacturer.

y Natural Draft Applications; typically over-fire draft

is -0.01” or -0.02” w.c.

y Direct Venting; typically may not require draft adjust-

ment.

y High Efficiency/Positive Pressure Appliances; also vary from traditional appliances (see manufacturer’s recommendations).

3.Follow these four steps to properly adjust the burner:

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

Step 2: At the trace of smoke level, measure the CO2 (or O2) . This is the vital reference point for further adjustments. Example: 13.5% CO2 (2.6% O2)

Step 3: Increase the air to reduce the CO2 by 1.5 to 2 percentage points. (O2 will be increased by approximately 2.0 to 2.7 percentage points.) Example: Reduce CO2 from 13.5% to 11.5% (2.6% to 5.3% O2).

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

yThis procedure provides a margin of reserve air to accommodate variable conditions.

yIf the draft level has changed, recheck the

smoke and CO2 (or O2) levels and readjust the burner, if necessary

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

5.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 specifications.

6.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

specified setting. Recheck the smoke and CO2 (or O2) levels. Adjust burner air if necessary.

6104 BCF5 R07 13