Beckett CF 2500/ 3500 Mount the burner, Mount flanges on air tube, Mount air tube to burner

Instruction Manual – Model CF2500/CF3500 Oil Burner

Mount the burner

❏Mount flange(s) on air tube

•This section does not apply to burners with welded flanges.

•Do not install air tube on burner.

•For non-pressure firing flange, refer to Figure 3: Install gasket (item a) and flange (item d). Ignore the next paragraph.

•For pressure-firing flange, refer to Figure 3: Slide gasket (item a) onto the air tube, making sure the top of the air tube is up. Predrill holes in the pressure firing plate (item b) to match the appliance studs. Slide the pressure firing plate (item b) and flange (item d) onto the air tube as shown. Wrap ceramic fiber rope (item c) around the air tube and press tightly into the inside diameter of the flange (item d).

•Slide the air tube (item e) into position in the appliance front. Tighten the flange-mounting-stud nuts. Set the insertion of the air tube so dimension G is ¹⁄₄" nominal.

•Pitch the air tube at 2° from horizontal as shown and secure the flange to the air tube. Remove the flange-mounting stud nuts and remove the air tube from the appliance.

Figure 3 – Mount flange(s) on air tube

G 2°

Figure 4 – Nozzle and nozzle line assembly

		S		Q
			P
0.713311"
	Low fire	High fire
	nozzle	nozzle		R

3504

3505

Critical dimensions —

S (Electrode spacing)	=	³⁄₃₂"	P (Nozzle center line to electrode tip)	= ¹⁄₄"
Q (Nozzle to head)	=	¹⁄₄"	R (Nozzle face to electrode tip)	= ¹⁄₈"

c

e

Failure to properly set and maintain the electrode and nozzle spacing dimensions can cause incorrect burner ignition or poor combustion. This could result in severe personal injury, death or substantial property damage.

a b d

3503

❏Mount air tube to burner

•Remove the rear access door from the back of the burner for improved access to the interior.

•Attach the air tube to the burner with the bolts and acorn nuts provided. The acorn nuts must go on the outside of the burner, with the bolts inserted from the inside.

❏Install nozzle

•See Figure 4. Install the oil nozzle in the nozzle adapter. Use a ³⁄₄" open-end wrench to steady the nozzle adapter and a ⁵⁄₈" open-end wrench to turn the nozzle. Tighten securely but do not overtighten.

•Check, and adjust if necessary, the critical dimensions P, Q, R and S shown in the drawing. Verify that the oil tube assembly and electrodes are in good condition, with no cracks or damage.

❏Install nozzle line assembly

•Insert the nozzle line assembly into the burner air tube as in Figure 5.

•See Figures 5 and 6. Assemble the adjusting plate assem- bly per the instructions in the assembly packet.

•Slide the secondary adjusting plate (item f) completely to the left on the indicator adjusting plate (item e). Finger- tighten acorn nut c to secure the two plates together. Slide both plates completely to the left on the primary adjusting plate (item g) and finger-tighten acorn nut d.

•Slide the completed adjusting plate assembly over the nozzle line end. Move the plate assembly and the nozzle line so the plate assembly fits into position as shown in

Figure 5.

•Install the spline nut (Figure 5, item b) on the end of the nozzle line, leaving the nut loosely placed so the plates can be moved.

•Connect the high-voltage leads from the ignition trans-

former to the electrodes.

6 Form 6104 BCF-35-R0699