Beckett CF 2300A Verify firing rate, Verify air tube, Air tube capacity vs. firebox pressure

Instruction Manual – Model CF2300A Oil Burner

❏Verify firing rate

Figure 2 – Air tube mounting dimensions

•Refer to appliance manufacturer’s instructions (if avail- able) for firing rate and nozzle selection. Otherwise, the maximum recommended firing rate for the burner depends on the length of the firing chamber and the distance from the burner center to the chamber floor. Verify that the cham- ber dimensions are at least as large as the minimum values given in Figure 1. If the appliance dimensions are smaller than recommended, reduce the firing rate accordingly.

❏Verify air tube

		T
G	2°

D

F

EInsertion depth

GAir tube to inside of chamber

– 0.25" ± 0.125"

1T Air tube length

DTube diameter

•The information in this section may be disregarded if the air tube is supplied by the appliance manufacturer.

•Two tube arrangements are available –

Tube KG — 7.0 to 19.9 GPH per	Table 2
Tube KS — 10.0 to 19.9 GPH per	Table 2

•Maximum firing capacity depends on the firebox pressure. Use Table 2 to verify the correct air tube type for the firing rate required. Use Tube KS only when Tube KG cannot provide the firing rate required.

•See Figure 2 to verify the correct air tube length and air tube combination code.

Figure 1 – Min. combustion chamber dimensions

L

A

2305

Firing rate		Minimum dimensions
	(refractory-lined)			(wet-base boilers)
	A		L	A	L
5 to 10 gph	8.0"		35.0"	8.0"	40.0"
10 to 15 gph	9.0"		40.0"	9.0"	50.0"
15 to 20 gph	11.0"		55.0"	11.0"	60.0"

E 2304

①Install the burner with a 2° pitch as shown.

A.T.C. Codes

(A.T.C. = Air Tube Combination)

	Tube KG				Tube KS
(Dim T)	(Dim D)		(Dim F)	(Dim T)	(Dim D)		(Dim F)
All —	6¹⁄₂”		2¹⁵⁄₁₆”	All —	8¹⁄₈”		3¹¹⁄₁₆”
6¾”	CF	66 KG		6¾”	CF	66 KS
—		—		8¾”	CF	86 KS
10¼”	CF 102 KG			11”	CF 110 KS
13¾”	CF 136 KG			14½”	CF 144 KS
17¾”	CF 176 KG			18½”	CF 184 KS

Table 2 – Air tube capacity vs. firebox pressure

Firebox	Tube KG		Tube KS
pressure	No reserve	10%	No reserve	10%
(In. w.c.)
	air	turndown	air	turndown

0.019.9 GPH 19.9 GPH 19.9 GPH 19.9 GPH

0.219.2 GPH 19.1 GPH 19.7 GPH 19.6 GPH

0.418.5 GPH 18.3 GPH 19.5 GPH 19.3 GPH

0.617.9 GPH 17.6 GPH 19.4 GPH 19.1 GPH

0.817.2 GPH 16.8 GPH 19.2 GPH 18.8 GPH

1.016.5 GPH 16.0 GPH 19.0 GPH 18.5 GPH

Note: 10% turndown indicates sufficient reserve air to reduce the CO2 in the flue to 90% of its value.

Note: The above ratings may vary 5% due to variations in actual job conditions.

Form 6104 BCF-23-R0399 5