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Gas Requirements
70458101 (EN)
38
Gas Supply Pipe Sizing and
Looping
Figure 16
TMB2126N
1
Gas furnace (35.2 kW [120,000 Btu/hr.])
8
7.6 m (25 ft.)
2
Gas water heaters (117.2 kW
9
Main regulator
[400,000 Btu/hr. each])
10
Gas meter
3
Gas space heaters (20.5 kW
11
Pressure regulator (if required)
[70,000 Btu/hr. each])
12
120 Series Tumble Dryers (79.13 kW
4
Sediment traps, supply pressure taps and
[270,000 Btu/hr.each])
shut-off valves. Refer to
Figure 15
.
170 Series Tumble Dryers (115.77 kW
5
25.4 mm (1 in.) gas pipe loop
[395,000 Btu/hr.each])
6
5.8 m (19 ft.)
200 Series Tumble Dryers (124.56 kW
7
Minimum Pipe Size to Tumble Dryer is
[425,000 Btu/hr. each])
19 mm (0.75 in.) for 120 Series Gas,
25 mm (1 in.) for 170 and 200 Series Gas.
SAMPLE CALCULATIONS:
Equivalent length = Total length of main gas supply pipe to the far end of the Tumble Dryers.
= 7.6 m + 5.8 m (25 ft. + 19 ft.) gas supply pipe
= 13.4 m (44 ft.) 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 79.13 (270,000)
= 712.17 kW (2,430,000 Btu/hr.)
Using
Table 7
, the main supply pipe diameter should be 76 mm (3 in.).
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
