Noritz EcoTOUGH NRC661A-DV Installation Manual

Also see for EcoTOUGH NRC661A-DV: Owner's guide Owner's guide Owner's guide Replacement

11Maximum Vent Lengths• This appliance has been designed to be ventedwith either 3" (75mm) PVC or CPVC pipe.Do not exceed the following maximum vent lengths:* Not including the termination• Maintain the same vent pipe diameter from theheater flue to the vent termination. The exhaustand intake pipes must be the same vent pipediameter.7. Vent Pipe Installation (Indoor Installation Only)WARNINGBe sure to doCARBON MONOXIDE POISONINGFollow all vent system requirements in accordance with relevant local or state regulation,or, in the absence of local or state code, in the U.S. to the National Fuel Gas Code ANSIZ233.1/NFPA 54 – latest edition, and in Canada, in accordance with the Natural Gas andPropane Installation Code CSA B149.1 – latest edition.No. of Elbows Max. Straight Vent Length*4 39' (11.7m)3 45' (13.5m)2 51' (15.3m)1 57' (17.1m)Pipe diameter 3" (75mm)• Under normal conditions, this appliance willnot produce an exhaust flue temperaturein excess of 149°F (65°C) and schedule 40PVC pipe may be used as the vent material.If required by local code, schedule 40 or 80CPVC may also be used on this appliance.Refer to page 13 for additional requirements.• Make sure the vent system is gas tight andwill not leak.• Support the vent pipe with hangers at regularintervals as specified by these instructions orthe instructions of the vent manufacturer.• Do not common vent or connect more thanone appliance to this venting system.• The total vent length including horizontal & verticalvent runs should be no less than 3' (0.9m).• Do not store hazardous or flammable substancesnear the vent termination and check that thetermination is not blocked in any way.• Steam or condensed water may come outfrom the vent termination. Select the locationfor the termination so as to prevent injury orproperty damage.• If snow is expected to accumulate, take carethe end of the pipe is not covered with snowor hit by falling lumps of snow.General RequirementsClearancesPVC or CPVC has been approved for use on thisappliance with zero clearance to combustibles.