Gas Supply Pipe Sizing and Looping
TMB2126N_SVG
1 2 3 4 5 6 7 8 9
M
6
8
7
4
5
3
2
1
9 10
11
12
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 15 .
5. 1 in. [25.4 mm] gas pipe loop
6. 19 ft. [5.8 m]
7. Minimum Pipe Size is 0.75 in. [19 mm] for 120 Series Gas, 1 in. [25.4 mm] for 170 and 200 Series Gas.
8. 25 ft. [7.6 m]
9. Main regulator
10. Gas meter
11. Pressure regulator (if required)
12. 120 series tumble dryers = 270,000 Btu/hr. [285 Mj/hr.,79.13 kW] each; 170 series tumble dryers = 395,000 Btu/hr. [417 Mj/
hr., 115.77 kW] each; 200 series tumble dryers = 425,000 Btu/hr. [448 Mj/hr., 124.56 kW] each
Figure 16
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 120 series tumble
dryers being fed by the main gas supply pipe.
= 9 x 270,000 [285, 79.13]
= 2,430,000 Btu/hr. [2,564 Mj/hr., 712.17 kW]
Using Table 5 and Table 6 , the main supply pipe diameter
should be 3 in. [76 mm].
IMPORTANT: Gas loop piping must be installed as il-
lustrated to equalize gas pressure for all tumble dryers
connected to single gas service. Other gas using appli-
ances should be connected upstream from loop.
Low Pressure Gas Pipe Sizes
NOTE: Sizing calculations based on National Fuel Gas
Code.
Gas Requirements
©
Copyright, Alliance Laundry Systems LLC -
DO NOT COPY or TRANSMIT
44 Part No. 70458101ENR10
To Next Page
Loading...
