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Electrolux SBB800S-1 Installation Manual Page 24

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Pipe
Size
Length (including ttings)
10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 125'
(3m) (6m) (9m) (12m) (15m) (18m) (21m) (24m) (27m) (30m) (38m)
3/4" 360 247 199 170 151 137 126 117 110 104 92
1" 678 466 374 320 284 257 237 220 207 195 173
1 1/4" 1,390 957 768 657 583 528 486 452 424 400 355
1 1/2" 2,090 1,430 1,150 985 873 791 728 677 635 600 532
2" 4,020 2,760 2,220 1,900 1,680 1,520 1,400 1,300 1,220 1,160 1,020
2 1/2" 6,400 4,400 4,400 3,020 2,680 2,430 2,230 2,080 1,950 1,840 1,630
3" 11,300 7,780 7,780 5,350 4,740 4,290 3,950 3,760 3,450 3,260 2,890
4" 23,100 15,900 12,700 10,900 9,660 8,760 8,050 7,490 7,030 6,640 5,890
Table 1. For Less than 8” WC initial supply pressure
Maximum Natural Gas Delivery Capacity (0.5” Pressure Drop) [Schedule 40 Metalic Pipe]
Values in Table are in Cubic Feet of Gas per Hour (0.60 Specic Gravity, 0.5” Pressure Drop, inlet pressure less than 2psi). Contact your gas
supplier for BTU/Cubic Foot ratings. For simplication of your calculations, 1 Cubic Foot of Gas is approximately equivalent to 1000 BTU.
Instructions
1. Size each outlet branch starting from the furthest
using the Btuh required and the length from the meter.
2. Size each section of the main line using the length to
the furthest outlet and the Btuh required by everything
after that section.
Sample Gas Line
Sample Calculation - (Using 0.5” WC Pressure Drop Table)
Outlet A: 45' (13.5m) (Use 50' (15m)), 50,000 Btuh requires 1/2"
Outlet B: 40' (12m), 65,000 Btuh requires 1/2"
Section 1: 45' (13.5m) (Use 50' (15m)), 115,000 Btuh requires 3/4"
Outlet C: 30' (9m), 35,000 Btuh requires 1/2"
Section 2: 45' (13.5m) (Use 50' (15m)), 150,000 Btuh requires 3/4"
Outlet D: 25' (7.5m) (Use 30' (9m)), 25,000 Btuh requires 1/2"
Section 3: 45' (13.5m) (Use 50' (15m)), 175,000 Btuh requires 1"
Outlet E: 25' (7.5m) (Use 30' (9m)), 180,000 Btuh requires 3/4"
Section 4: 45' (13.5m) (Use 50' (15m)), 355,000 Btuh requires 1 1/4"
Natural Gas
Meter
Electrolux Condensing Tankless Gas Water Heater
(180,000 Btuh)
Clothes Dryer
(35,000 Btuh)
Barbecue
(50,000 Btuh)
Gas Range Stove
(65,000 Btuh)
10' (3m)
10' (3m)
10' (3m)
10' (3m)
5' (1.5m)
5' (1.5m)
5' (1.5m)
5' (1.5m)5' (1.5m) 5' (1.5m)
Gas Fireplace
(25,000 Btuh)
Section 3 Section 2
Section 1
Outlet A
Outlet B
Outlet C
Outlet D
Outlet E
Section 4
Table 2. For 8” WC – 10.5” WC initial supply pressure
Maximum Natural Gas Delivery Capacity (3.0” Pressure Drop) [Schedule 40 Metalic Pipe]
Values in Table are in Cubic Feet of Gas per Hour (0.60 Specic Gravity, 3.0” Pressure Drop, 8.0” WC or greater supply pressure, inlet
pressure less than 2psi). Contact your gas supplier for BTU/Cubic Foot ratings. For simplication of your calculations, 1 Cubic Foot of
Gas is approximately equivalent to 1000 BTU.
Natural Gas
Meter
Electrolux Condensing Tankless Gas Water Heater
(180,000 Btuh)
Clothes Dryer
(35,000 Btuh)
Barbecue
(50,000 Btuh)
Gas Range Stove
(65,000 Btuh)
10' (3m)
10' (3m)
10' (3m)
10' (3m)
5' (1.5m)
5' (1.5m)
5' (1.5m)
5' (1.5m)5' (1.5m) 5' (1.5m)
Gas Fireplace
(25,000 Btuh)
Instructions
1. Size each outlet branch starting from the furthest
using the Btuh required and the length from the meter.
2. Size each section of the main line using the length to
the furthest outlet and the Btuh required by everything
after that section.
Sample Gas Line
Sample Calculation (Using 3.0” WC Pressure Drop Table)
Outlet A: 45' (13.5m) (Use 50' (15m)), 50,000 Btuh requires 1/2"
Outlet B: 40' (12m), 65,000 Btuh requires 1/2"
Section 1: 45' (13.5m) (Use 50' (15m)), 115,000 Btuh requires 1/2"
Outlet C: 30' (9m), 35,000 Btuh requires 1/2"
Section 2: 45' (13.5m) (Use 50' (15m)), 150,000 Btuh requires 1/2"
Outlet D: 25' (7.5m) (Use 30' (9m)), 25,000 Btuh requires 1/2"
Section 3: 45' (13.5m) (Use 50' (15m)), 175,000 Btuh requires 1/2"
Outlet E: 25' (7.5m) (Use 30' (9m)), 180,000 Btuh requires 1/2"
Section 4: 45' (13.5m) (Use 50' (15m)), 355,000 Btuh requires 3/4"
Section 3 Section 2
Section 1
Outlet A
Outlet B
Outlet C
Outlet D
Outlet E
Section 4
Pipe
Size
Length (including ttings)
10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 125'
(3m) (6m) (9m) (12m) (15m) (18m) (21m) (24m) (27m) (30m) (38m)
1/2" 454 312 250 214 190 172 158 147 138 131 116
3/4" 949 652 524 448 397 360 331 308 289 273 242
1" 1,787 1,228 986 844 748 678 624 580 544 514 456
1 1/4" 3,669 2,522 2,025 1,733 1,536 1,392 1,280 1,191 1,118 1,056 936
1 1/2" 5,497 3,778 3,034 2,597 2,302 2,085 1,919 1,785 1,675 1,582 1,402
2" 10,588 7,277 5,844 5,001 4,433 4,016 3,695 3,437 3,225 3,046 2,700
2 1/2" 16,875 11,598 9,314 7,971 7,065 6,401 5,889 5,479 1,540 4,856 4,303
3" 29,832 20,503 16,465 14,092 12,489 11,316 10,411 9,865 9,087 8,584 7,608
4" 43678 30,020 24,107 20,632 18,286 16,569 15,243 14,181 13,305 12,568 11,139
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