Beckett CF 1400 Verify firing rate, Verify air tube, Air tube capacity vs. firebox pressure

Instruction Manual – Model CF1400 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

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 A — 4.0 to 11.0 GPH per	Table 2
Tube B — 7.0 to 13.6 GPH per	Table 2

E 1404

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

•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 B only when Tube A cannot pro- vide 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

					1405
Firing rate		Minimum dimensions
	(refractory-lined)			(wet-base boilers)
	A		L	A	L
0 to 5 gph	7.0"		25.0"	7.0"	25.0"
5 to 10 gph	8.0"		35.0"	8.0"	40.0"

Air tube	A.T.C. Codes
	(A.T.C. = Air Tube Combination)
length
	Tube A	Tube B
(Dimension T)
	(Dim. D = 5½")	(Dim. D = 5¾")
6.75"	CF 66 KD	CF 66 KE
10.25"	CF 102 KD	CF 102 KE
13.75"	CF 136 KD	CF 136 KE
17.75"	CF 176 KD	CF 176 KE

Table 2 - Air tube capacity vs. firebox pressure

Firebox	Tube A	Tube B
pressure
(In. w.c.)	10% turndown	No reserve air	10% turndown
0.0	11.0 GPH	13.6 GPH	12.2 GPH
0.2	10.5 GPH	13.1 GPH	11.7 GPH
0.4	10.1 GPH	12.5 GPH	11.2 GPH
0.6	9.6 GPH	12.0 GPH	10.8 GPH
0.8	9.2 GPH	11.4 GPH	10.3 GPH
1.0	8.7 GPH	10.9 GPH	9.8 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 BCF14N-R0299 5