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Gas Requirements
37
70420301 (EN)
Gas Supply Pipe Sizing and Looping
Figure 19
TMB2126N
1
Gas furnace (120,000 Btu/hr.)
7
Minimum Pipe Size is 0.5 in. (12.7 mm)
2
Gas water heaters (400,000 Btu/hr. each)
8
25 ft. (7.6 m)
3
Gas space heaters (70,000 Btu/hr. each)
9
Main regulator
4
Sediment traps, supply pressure taps and
10
Gas meter
shut-off valves. Refer to
11
Pressure regulator (if required)
5
1 in. (25.4 mm) gas pipe loop
12
50 pound tumble dryers (130,000 Btu/hr. each)
6
19 ft. (5.8 m)
75 pound tumble dryers (165,000 Btu/hr. each)
F75 pound tumble dryers (225,000 Btu/hr. each)
SAMPLE CALCULATIONS:
Equivalent length = Total length of main gas supply pipe to the far end of the tumble dryers
= 25 ft. + 19 ft. (7.6 m + 5.8 m) gas supply pipe
= 44 ft. (13.4 m) Total Gas Line
Total Btu/hr.
= The sum of the Btu/hr. of all 50 pound tumble dryers being fed by the main gas supply pipe
= 9 x 130,000
= 1,170,000 Btu/hr.
Using
, the main supply pipe diameter should be 2 in. (51 mm)
IMPORTANT: Gas loop piping must be installed as illustrated to equalize gas pressure for all tumble
dryers connected to single gas service. Other gas using appliances should be connected upstream from
loop.
1
2
3
4
5
6
7
8
9
M
9
12
8
6
3
2
1
10
11
7
5
4
Содержание YT050E
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