Gas Supply Pipe Sizing And Looping - ALLIANCE CA050L Installation Operation & Maintenance

Gas Requirements
Gas Supply Pipe Sizing and
Looping
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9 10
M
1 Gas furnace
(120,000 Btu/hr. [127 Mj/hr., 35.2 kW])
2 Gas water heaters
(400,000 Btu/hr. [422 Mj/hr., 117.2 kW] each)
3 Gas space heaters
(70,000 Btu/hr. [79 Mj/hr., 20.5 kW] each)
4 Sediment traps, supply pressure taps and
shut-off valves. Refer to Figure 22.
5 1 in. (25.4 mm) gas pipe loop
6 19 ft. (5.8 m)
7 Minimum Pipe Size is 0.5 in. (12.7 mm)
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 050 series tumble dryers being fed by the main gas supply pipe.
= 9 x 130,000 (137, 38.1)
= 1,170,000 Btu/hr. (1,234 Mj/hr., 342.9 kW)
Using Table 5, 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.
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© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
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8 25 ft. (7.6 m)
9 Main regulator
10 Gas meter
11 Pressure regulator (if required)
12 050 series tumble dryers
(130,000 Btu/hr. [137 Mj/hr., 38.1 kW] each)
075 series tumble dryers
(165,000 Btu/hr. [174 Mj/hr., 48.359 kW] each)
F75 series tumble dryers
(225,000 Btu/hr. [237 Mj/hr., 65.94 kW] each)
Figure 23
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