Noritz NRCB199DV Installation Manual

Also see for NRCB180DV: Instructional manual Owner's guide Installation manual

23Table 3. Maximum Undiluted Propane (LP) Delivery Capacity in Thousands ofBtuH (0.5” WC Pressure Drop) [Schedule 40 Metallic Pipe]For reference only. Please consult gas pipe manufacturer for actual pipe capacities.Final CheckWhen the installation is complete, verify that inlet gas pressure for the entire gas system does notdrop below 5” WC for NG or 8” WC for LP at all appliances. This can be tested by turning on allgas burning appliances including the Combi Boiler, then check the inlet pressure at each applianceto verify all appliances are receiving a minimum of 5” WC for NG or 8” WC for LP. If all appliancesare not receiving the minimum inlet pressure the gas piping system may need to be changed.CAUTIONPipeSizeLength (including fittings)10' 20' 30' 40' 50' 60' 80' 100' 125' 150' 175' 200'(3m) (6m) (9m) (12m) (15m) (18m) (24m) (30m) (38m) (45m) (53m) (60m)1/2" 291 200 160 137 122 110 101 94 89 84 74 673/4" 608 418 336 287 255 231 212 197 185 175 155 1401" 1,150 787 632 541 480 434 400 372 349 330 292 2651 1/4" 2,350 1,620 1,300 1,110 985 892 821 763 716 677 600 5431 1/2" 3,520 2,420 1,940 1,660 1,480 1,340 1,230 1,140 1,070 1,010 899 8142" 6,790 4,660 3,750 3,210 2,840 2,570 2,370 2,200 2,070 1,950 1,730 1,570