Beckett CF 2500/ 3500 instruction manual Start the burner, Start burner and vent air from oil line

Instruction Manual – Model CF2500/CF3500 Oil Burner

Start the burner

Do not proceed unless all prior steps in this manual have been completed. Failure to comply could result in severe personal injury, death or substantial property damage.

Do not attempt to start the burner when excess oil has accumulated, when the appliance is full of vapor or when the combustion chamber is very hot. Do not attempt to reestablish flame with the burner running if the flame should be extinguished during start-up, venting or adjustment. Allow the unit to cool off and all vapors to dissipate before attempting another start. Failure to comply with these guidelines could cause an explosion or fire, resulting in severe personal injury, death or substantial property damage.

Damper motor and motor arm assembly - Do not attempt to adjust the cam setting in the damper motor. It is factory preset. Do not move the ball joint assembly further out on the motor arm assembly. This would change the timing of damper opening versus fuel rate. The damper linkage arm screw must be tightened securely to assure the damper will provide sufficient air at high fire. Failure to comply could cause unreliable combustion or flame failures, leading to possible severe personal injury, death or substantial property damage.

❏Start burner and vent air from oil line

1.Move the low-fire hold switch to the “IN” position (to hold burner in low fire when started).

2.Verify that the air adjusting plate (Figure 12, item m) has been set to the initial low-fireair position as described on page 12 under Initial air settings.

3.Loosen the screw on the damper linkage arm (Figure 12, item f) and allow the damper indicator (Figure 12, item k) to rest on the air adjusting plate (Figure 12, item m).

4.Open the oil shutoff valves in the oil supply (and return) line(s) to the burner.

5.Set the thermostat (or operating control) to call for heat.

6.Close the line switch to the burner. The burner motor should start immediately.

7.If the burner motor does not start, reset the motor overload switch (if so equipped) and press the reset switch of the burner primary control.

8.Vent the fuel unit as soon as the burner motor starts rotating. To vent —

❏Attach a clear plastic tube to the air bleed valve (Figure 8a, 8b, 9a or 9b as applies, item p).

❏Place the end of the tube in a container to catch the oil. Then loosen the fuel unit air vent valve.

❏Tighten the air vent valve after all air has been purged.

❏IF burner stops during venting —

•The burner primary control will lockout if flame is not established within its time limit. This is typically 15 seconds for R8184 primary controls, but may be less for other flame supervisory controls.

•The burner may lockout several times during the period needed to purge all the air. Reset the primary control each time in order to continue purging.

•If the burner is equipped with an R8184 primary, you will need to wait about 2 minutes after each lockout to allow time for the reset switch to cool.

•Squeeze off the air bleed tubing or close the air vent valve when the pump stops running to prevent air from flowing back into the oil line.

If the fuel unit air vent valve is completely open, assuring no flow of oil to the burner oil nozzle, you can temporarily jumper the F-Fterminals of an R8184 primary during the purge period to allow enough time for all air to purge. Never leave the burner unattended when doing this. Remove the jumper when purging is completed. This procedure should only be used by a qualified burner technician, experienced in burner operation and control. Improper application of this method can cause combustion chamber explosion, fire hazard or fuel leakage, resulting in severe personal injury, death or substantial property damage.

❏IF burner stops after flame established —

•Additional venting is probably required. Repeat the air venting procedure.

9.Once flame is steady, proceed to Set high-fire air.

❏Set high-fire air

1.Allow the burner to run at low fire until the appliance has warmed sufficiently.

2.Visually check the flame. The flame should not be dark orange or smoky. If the flame appears to be smoking, in- crease the amount of air by readjusting the damper indi- cator to a higher number.

3.Once the appliance has warmed, the high-fire setting can be checked and adjusted.

4.Locate the approximate air adjusting plate setting for high fire in Table 5, page 13.

5.Place the low-fire hold switch in the “OUT” position. The damper motor will begin to rotate.

a.At the same time, loosen the screw securing the air adjusting plate (Figure 12, item m) as the damper be- gins to move.

14 Form 6104 BCF-35-R0699