HTP RT-180 User Manual

23
LP-505 REV. 4.29.14
A. GAS PIPE SIZING TABLES
1. Gas Pipe Sizing
This information is for reference use only. Refer to gas pipe manufacturer specifications for actual delivery capacity. The DOE standard
for Natural Gas is 1100 BTU/ft
3
. Contact the local gas supplier for actual BTU/ft
3
rating.
2. Natural Gas Pipe Sizing
The following tables list maximum capacity of pipe in cubic feet of gas per hour for gas pressures of 14” or less and a pressure drop of
0.5 inches water column, based on a 0.60 specific gravity for natural gas.
Maximum Natural Gas Delivery Capacity – Length of Corrugated Stainless Steel Pipe in Feet
Pipe Size
Cubic Feet per Hour (0.60 Specific Gravity, 0.5 WC Pressure Drop)
10
20
30
40
50
60
80
100
150
200
½”
82
58
47
41
37
37
29
26
20
18
¾”
192
137
112
97
87
80
69
62
48
44
1”
383
269
218
188
168
153
132
118
91
82
1 ¼”
639
456
374
325
292
267
232
208
171
148
1 ½”
1260
888
723
625
559
509
440
393
320
277
2”
2930
2080
1700
1470
1320
1200
1040
933
762
661
Table 11 – Natural Gas Delivery Capacity – Corrugated Stainless Steel Pipe – Refer to ANSI Z223.1 – National Fuel Gas Code,
Latest Edition
Maximum Natural Gas Delivery Capacity – Length of Black Iron Pipe (Sch. 40 Metallic) in Feet
Pipe Size
Cubic Feet per Hour (0.60 Specific Gravity, 0.5 WC Pressure Drop)
10
20
30
40
50
60
80
100
150
200
½”
172
118
95
81
72
65
56
50
40
34
¾”
360
247
199
170
151
137
117
104
83
71
1”
678
466
374
320
284
257
220
195
157
134
1 ¼”
1390
957
768
657
583
528
452
400
322
275
1 ½”
2090
1430
1150
985
873
791
677
600
482
412
2”
4020
2760
2220
1900
1680
1520
1300
1160
928
794
Table 12 – Natural Gas Delivery Capacity – Black Iron Pipe – Refer to ANSI Z223.1 – National Fuel Gas Code, Latest Edition
3. LP (Liquid Propane) Gas Pipe Sizing
The following is intended for use for piping between a Single or Second Stage (Low Pressure) Regulator and the water heater. The
following tables list maximum capacity of pipe in cubic feet of gas per hour for an inlet pressure of 11 inches water column and specific
pressure drop of 0.5 inches water column based on 1.5 specific gravity for liquid propane.
Maximum Liquid Propane Delivery Capacity – Length of Corrugated Stainless Steel Pipe in Feet
Pipe Size
Cubic Feet per Hour (0.60 Specific Gravity, 0.5 WC Pressure Drop)
10
20
30
40
50
60
80
100
150
200
½”
129
91
74
64
58
53
45
41
31
28
¾”
303
216
177
153
137
126
109
98
75
69
1”
605
425
344
297
265
241
208
186
143
129
1 ¼”
971
661
528
449
397
359
307
270
217
183
1 ½”
1990
1400
1140
988
884
805
696
621
506
438
2”
4640
3290
2680
2330
2080
1900
1650
1480
1210
1050
Table 13 – Liquid Propane Delivery Capacity – Corrugated Stainless Steel Pipe – Refer to ANSI Z223.1 – National Fuel Gas
Code, Latest Edition
Maximum Liquid Propane Delivery Capacity – Length of Black Iron Pipe (Sch. 40 Metallic) in Feet
Pipe Size
Cubic Feet per Hour (0.60 Specific Gravity, 0.5 WC Pressure Drop)
10
20
30
40
50
60
80
100
150
200
½”
291
200
160
137
122
110
101
94
84
67
¾”
608
418
336
287
255
231
212
197
175
140
1”
1150
787
632
541
480
434
400
372
330
265
1 ¼”
2350
1620
1300
1110
985
892
821
763
677
543
1 ½”
3520
2420
1940
1660
1480
1340
1230
1140
1010
814
2”
6790
4660
3750
3210
2840
2570
2370
2200
1950
1570
Table 14 – Liquid Propane Delivery Capacity – Black Iron Pipe – Refer to ANSI Z223.1 – National Fuel Gas Code, Latest Edition
B. GAS CONNECTION REQUIREMENTS
1. The gas connection fitting on the water heater is ¾” female NPT. NOTE: The pipe size must not be less than ¾”.

HTP RT-180 Specifications

General

Brand	HTP
Model	RT-180
Category	Boiler
Language	English