Gas Requirements

Gas Supply Pipe Sizing and Looping

 

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TMB2126N

1

Gas Furnace (120,000 Btu/hr.)

8

25 ft. (7.6 m)

 

 

 

 

 

 

2

Gas Water Heaters (400,000 Btu/hr. each)

9

Main Regulator

 

 

 

 

 

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Gas Space Heaters (70,000 Btu/hr. each)

10

Gas Meter

 

 

 

 

 

 

 

4

Sediment Traps, Supply Pressure Taps and

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Pressure Regulator (If required)

 

Shut-Off Valves. Refer to Figure 10.

12

120 Pound tumble dryers (270,000 Btu/hr. each)

5

1 in. (25.4 mm) Gas Pipe Loop

 

170 Pound tumble dryers (395,000 Btu/hr. each)

619 ft. (5.8 m)

7Minimum Pipe Size to Tumble dryer is 0.75 in. for 120 Pound Gas, 1 in. for 170 Pound Gas

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 pound tumble dryers being fed by the main gas supply pipe.

=9 x 270,000

=2,430,000 Btu/hr.

Using Table 7, the main supply pipe diameter should be 3 in. (76 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.

Figure 11

70420801 (EN)

© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT

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Alliance Laundry Systems 907003062 manual Gas Supply Pipe Sizing and Looping, 4 mm Gas Pipe Loop

907003062 specifications

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