The capacities are shown in the tables below. Burners are shipped with the primary air adjustment screw closed. The tables below list the number of counterclockwise turns from a fully clockwise seated position necessary to achieve 30% primary air.
Table 2
Cold Combustion Air Capacity at Operating Pressure
Air Adj. Turns for 30% Primary
(Nm3/hr @ 0°C combustion air temperature
(scfh) @ 60°F combustion air temperature
Capacity Series
Pressure Series
(mBar)
(osig)
0.5
1
4
8
12
16
2
4
17
34
52
69
800 800 800 600 600 600 400 400 400
16 12
2,490 3,521 7,042 9,959 12,197 14,084
69 76 88 49 57 64 33 36 43
97
194 274 336
388
5 5 7
2,753 3,893 7,786
11,010 13,485
— —
107 124 70 80 90 47
214 303 249 352
371
— —
8
3,198 4,523 9,046 12,793
—
—
16 12
1,794 2,537 5,075 2,055 2,906 5,812
7,176
8,789 10,149
140 198 242 160 226 277
279
1 1
8,220 10,068
— —
— —
8
2,314 3,272 6,544 9,254
—
180 255
—
2
16 12
1,196 1,317
1,691 3,383 4,784 5,859 6,765
93
132
161 178
186
1 1
1,862 3,724 5,266 6,450
— —
51 61
102 145
— —
8
1,561 2,207 4,414
6,242
—
121
172
—
2
Preheated Combustion Air Capacity at Operating Pressure
Air Adj. Turns for 30% Primary
(Nm3/hr @ 400°C combustion air temperature
(scfh) @ 750°F combustion air temperature
Capacity Series
Pressure Series
(mBar)
(osig)
0.5
1
4
8
12
16
2
4
17
34
52
69
800 800 800 600 600 600 400 400 400
16 12
1,694 2,396 4,791 1,873 2,648 5,297 2,176 3,077 6,154
6,775 8,298 9,582
45 50 58 33 37 42 22 24 28
64
128 182
222
257
5 5 7
7,491 8,703
9,174
— —
71
142 201 246
— —
8
—
82 46 53 60
165 233
—
16 12
1,220
1,726 3,452 4,882 5,979 6,904
93
131
160 184
185
1 1
1,398 1,977 3,954 1,574 2,226 4,451
5,591 6,295
6,848
— —
106 150 119 169
— —
8
—
—
2
16 12
814 896
1,151
2,301
3,254 3,985 4,602
31
62 68 80
87 96 114
107 118
123
1 1
1,267 2,533 3,583 4,388
— —
34 40
— —
8
1,062
1,501 3,002 4,246
—
—
2
The primary air adjustment may be adjusted to a maximum of 40%. Therefore the blower should be selected to deliver 117% (from Table 2) of the rated total burner capacity.
4723LNX-E is a direct spark ignited burner. The main flame is ignited by a simple electrode located behind the flame front for cool long-life operation. The spark should be turned on before the burner gas valve is opened. During the ignition period, a continuous 6000 volt spark is required. Spark distributor systems cannot be used with 4723LNX-E burners. Aer the burner is ignited, the spark must be turned off for proper burner operation.
Bulletin 4723LNx Page 3
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