6
APPENDIX B – POWER VENTING
Some direct vent boilers are also approved with
use of indoor combustion air. If the boiler you
are installing is approved for use with indoor
combustion air, install the vent according to the
instructions in
Appendix B2 Direct Venting
, but omit
the “optional” indoor air piping and components.
Specific instructions for configuring the boiler for
indoor air appear in the boiler-specific instructions
at the front of this manual.
APPENDIX C – GAS PIPING
ASSURE GAS PIPING IS LEAK FREE
AND OF PROPER SIZE and type for the
connected load.
SHUT OFF MAIN GAS SUPPLY prior to
installing or servicing boiler gas piping.
1.
Determine the boiler’s maximum gas
demand and minimum gas supply pressure
(printed on the boiler’s rating label) and the
Table C-1: Maximum Capacity of Schedule 0 Pipe in Cubic Feet Per Hour (CFH)
*
Length
(Feet)
0.3” w.c. Pressure Drop
0.5” w.c. Pressure Drop
½
¾
1
1¼
½
¾
1
1¼
10
132
278
520
1050
175
360
680
1400
20
92
190
350
730
120
250
465
950
30
73
152
285
590
97
200
375
770
40
63
130
245
500
82
170
320
660
50
56
115
215
440
73
151
285
580
60
50
105
195
400
66
138
260
530
70
46
96
180
370
61
125
240
490
80
43
90
170
350
57
118
220
460
90
40
84
160
320
53
110
205
430
100
38
79
150
305
50
103
195
400
*
1 CFH of Natural Gas is approximately equal to 1000 BTU/hr; 1 CFH of LP is approximately equal to 2500 BTU/hr.
Table C-2: Equivalent Lengths (ft) Of Standard Pipe Fittings & Valves
Pipe
Size
Gate
Globe
Angle
Swing
Check
90°
Elbow
45°
Elbow
90° ‘T’, Flow
Through Run
90° ‘T’, Flow
Through Branch
½”
0
19
9
4
2
1
1
3
¾”
0
23
12
5
2
1
1
4
1”
1
29
15
7
3
1
2
5
1 ¼”
1
39
20
9
4
2
2
7
1 ½”
1
45
22
11
5
3
3
8
demand of other gas appliances served by
the same gas meter.
2.
Ensure that gas piping, fittings, and gas
meter capacities can supply the maximum
gas demand of all appliances at pressures
above their minimum allowable gas
pressure. The following tables provide
typical capacities of gas pipes and fittings.
Содержание ESC
Страница 6: ... Figure S 1 Minimum Clearances to Combustibles SPECIFICATIONS continued ...
Страница 30: ...30 Internal Wiring Figure IW 1 Wiring Diagram ...
Страница 31: ...31 Internal Wiring continued Figure IW 2 Wiring Diagram ...
Страница 37: ...37 APPENDIX B1 INTENTIONALLY OMITTED ...
Страница 50: ...50 Figure D 0 Piping Schematic Symbols APPENDIX D System Piping continued ...
Страница 62: ...62 SERVICE RECORD DATE SERVICE PERFORMED ...
Страница 63: ...63 SERVICE RECORD DATE SERVICE PERFORMED ...
Страница 64: ...64 U S Boiler Company Inc P O Box 3020 Lancaster PA 17604 717 397 4701 www usboiler burnham com ...
