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Figure 3.2: LC/LCE Boiler Piping
Table 3.1: Boiler Supply and Return Connections & Recommended Header Sizing
I=B=R
Gross
Model
Output
MBH
LC-04
547
LC-05R
649
LC-05
707
LC-06
868
LC-07
1029
LC-08
1189
LC-09
1350
LC-10
1511
LC-11
1672
LC-12
1832
LCE-13
1966
LCE-14
2125
LCE-15
2284
LCE-16
2444
LCE-17
2603
LCE-18
2763
LCE-19
2922
LCE-20
3082
LCE-21
3256
LCE-22
3430
LCE-23
3604
LCE-24
3777
Suggested Supply
GPM
Connections – Top
@ 20°F
Rise
Number
55
1
65
1
71
1
87
1
103
1
119
2
135
2
151
2
167
2
183
2
197
2
213
2
228
2
244
2
260
2
276
2
292
2
308
2
326
2
343
2
360
2
378
2
Size
Header
(Inches)
(Inches)
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
5
4
5
4
5
4
5
4
5
4
5
4
5
4
5
PIPE THE BOILER
Return Connections
Rear and Side
Size
Number
(Inches)
1
2-1/2
1
2-1/2
1
2-1/2
1
3
1
3
2
3
2
3
2
3
2
3
2
3
2
3
2
3
2
3
2
3
2
3
2
3
2
3
2
3
3
3
3
3
3
3
3
3
Header
(Inches)
2-1/2
2-1/2
2-1/2
3
3
3
3
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
21
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