Beckett CF500, 800 manual Nozzle Capacities, ‰ Verify burner components, ‰ Verify firing rate

Table 1 - Nozzle Capacities

Rated gph @	Pressure - Pounds per
100 psig	square inch
	140	150
1.75	2.07	2.14
2.00	2.37	2.45
2.25	2.66	2.74
2.50	2.96	3.06
2.75	3.24	3.37
3.00	3.55	3.68
3.50	4.13	4.29
4.00	4.70	4.90
4.50	5.30	5.51
5.00	5.90	6.13
5.50	6.50	6.74
6.00	7.10	7.33
6.50	7.65	7.96

‰Verify burner components —

yBurner, Model CF500 or CF800

yAir tube assembly

yMounting flange kit

yOil nozzle, per Table 1 — Only 45° to 70° solid pattern nozzles are recommended unless otherwise specified by appliance manufacturer. (See specific appliance recommendation sheet or refer to OEM Spec Guide). Find the required firing rate in the 140 psig column (factory-set fuel unit pressure). Select the corresponding nozzle from column 1 (Rated gph @ 100 psig).

Figure 2. Min. Combustion Chamber Dimensions

‰Verify firing rate

yRefer to appliance manufacturer’s instructions (if available) 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 chamber dimensions are at least as large as the minimum values given in Figure 2. If the appliance dimensions are smaller than recommended, reduce the firing rate accordingly.

‰Verify air tube

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

yTwo tube arrangements are available –

CF500 1.75 to 5.50 GPH

CF800 Tube A — 3.00 to 7.00 GPH

Tube B — 5.00 to 8.00 GPH

yMaximum firing capacity depends on the firebox pressure. Use Table 2 to verify the correct air tube type for the fir- ing rate required. Use Tube B only when Tube A cannot provide the firing rate required.

ySee Figure 3 to verify the correct air tube length and air tube combination code.

Figure 3 - Air Tube Mounting Dimensions

u

		Minimum Dimensions
Firing Rate
	(with damper)			(without damper)
	A		L	A	L
1.75 to 3.00 gph	7.5”		18.0”	8.0”	19.0”
4.00 gph	8.0”		21.0”	9.5”	23.0”
5.00 gph	9.0”		23.0”	10.5”	30.0”
6.00 gph	10.0”		28.0”	11.5”	40.0”
7.00 gph	11.0”		34.0”	12.0”	46.0”
8.00 gph	14.0”		38.0”	14.0”	51.0”

u Install burner with 2o pitch as shown.

Air Tube			A.T.C. Codes
		(A.T.C. = Air Tube Combination)
Length
	CF500		CF800
(Dimension T)
			Tube A	Tube B
6.00”	CF 60 KK		CF 60 KH	CF 60 KJ
8.00”	CF 80 KK		CF 80 KH	CF 80 KJ
10.00”	CF 100 KK		CF 100 KH	CF 100 KJ
14.00”	CF 140 KK		CF 140 KH	CF 140 KJ
16.00”	CF160 KK		--	--
17.00”	--		CF 170 KH	CF 170 KJ

6 6104 BCF5 R07