Noritz NRC711-OD Installation Manual

Also see for ecoTOUGH NRC711-OD: Owner's guide Installation manual Owner's guide Owner's guide Replacement

Contents

10PipeSizeLength (including fittings)10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 125'(3m) (6m) (9m) (12m) (15m) (18m) (21m) (24m) (27m) (30m) (38m)3/4" 360 247 199 170 151 137 126 117 110 104 921" 678 466 374 320 284 257 237 220 207 195 1731 1/4" 1,390 957 768 657 583 528 486 452 424 400 3551 1/2" 2,090 1,430 1,150 985 873 791 728 677 635 600 5322" 4,020 2,760 2,220 1,900 1,680 1,520 1,400 1,300 1,220 1,160 1,0202 1/2" 6,400 4,400 4,400 3,020 2,680 2,430 2,230 2,080 1,950 1,840 1,6303" 11,300 7,780 7,780 5,350 4,740 4,290 3,950 3,760 3,450 3,260 2,8904" 23,100 15,900 12,700 10,900 9,660 8,760 8,050 7,490 7,030 6,640 5,890Table 1. For Less than 8” WC initial supply pressureMaximum Natural Gas Delivery Capacity (0.5” Pressure Drop)Values in Table are in Cubic Feet of Gas per Hour (0.60 Specific Gravity, 0.5” Pressure Drop, inlet pressure less than 2psi). Contact your gassupplier for BTU/Cubic Foot ratings. For simplification of your calculations, 1 Cubic Foot of Gas is approximately equivalent to 1000 BTU.Instructions1. Size each outlet branch starting from the furthestusing the Btuh required and the length from the meter.2. Size each section of the main line using the length tothe furthest outlet and the Btuh required by everythingafter that section.Sample Gas LineSample 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)), 157,000 Btuh requires 3/4"Section 4: 45' (13.5m) (Use 50' (15m)), 332,000 Btuh requires 1 1/4"Natural GasMeterNoritz Condensing Tankless Gas Water Heater(157,000 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 1Outlet AOutlet BOutlet COutlet DOutlet ESection 4Table 2. For 8” WC – 10.5” WC initial supply pressureMaximum Natural Gas Delivery Capacity (3.0” Pressure Drop)Values in Table are in Cubic Feet of Gas per Hour (0.60 Specific Gravity, 3.0” Pressure Drop, 8.0” WC or greater supply pressure, inletpressure less than 2psi). Contact your gas supplier for BTU/Cubic Foot ratings. For simplification of your calculations, 1 Cubic Foot ofGas is approximately equivalent to 1000 BTU.Natural GasMeterNoritz Condensing Tankless Gas Water Heater(157,000 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)Instructions1. Size each outlet branch starting from the furthestusing the Btuh required and the length from the meter.2. Size each section of the main line using the length tothe furthest outlet and the Btuh required by everythingafter that section.Sample Gas LineSample 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)), 157,000 Btuh requires 1/2"Section 4: 45' (13.5m) (Use 50' (15m)), 332,000 Btuh requires 3/4"Section 3 Section 2 Section 1Outlet AOutlet BOutlet COutlet DOutlet ESection 4PipeSizeLength (including fittings)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 1163/4" 949 652 524 448 397 360 331 308 289 273 2421" 1,787 1,228 986 844 748 678 624 580 544 514 4561 1/4" 3,669 2,522 2,025 1,733 1,536 1,392 1,280 1,191 1,118 1,056 9361 1/2" 5,497 3,778 3,034 2,597 2,302 2,085 1,919 1,785 1,675 1,582 1,4022" 10,588 7,277 5,844 5,001 4,433 4,016 3,695 3,437 3,225 3,046 2,7002 1/2" 16,875 11,598 9,314 7,971 7,065 6,401 5,889 5,479 1,540 4,856 4,3033" 29,832 20,503 16,465 14,092 12,489 11,316 10,411 9,865 9,087 8,584 7,6084" 43678 30,020 24,107 20,632 18,286 16,569 15,243 14,181 13,305 12,568 11,139