ACV COMFORT 45 Installation And Maintenance Manual

Contents

ACV COMFORT 45 Installation And Maintenance Manual Manual pdf 7 page image

Installation - Piping5Temperature & Pressure (T&P) Relief ValveTo reduce risk of excessive pressures and tem-peratures in the water heater, install tempera-ture and pressure protective equipmentrequired by local codes, but no less than a com-bination temperature and pressure relief valvecertified by a nationally recognized testing lab-oratory that maintains periodic inspection ofproduction of listed equipment or materials, asmeeting the requirements for Relief Valves andAutomatic Gas Shutoff Devices for Hot WaterSupply Systems, ANSI Z21.22. This valve mustbe marked with a maximum working pressureof the water heater.• Every COMFORT water heater must be pro-tected with a T&P relief valve.• Determine T&P relief valve size by the follow-ing specifications, unless they conflict withlocal codes:- COMFORT 45 and 55: 3/4”NPT with anAGA Rating of 100,000 BTU/hr and amaximum pressure rating of 125 psig.(Watts 40XL8-125210 or Apollo18C40236 or equivalent).For proper operation of the T&P and to pre-vent the T&P from activating due to boilerwater temperature, use a T&P relief valvewith extended element. We recommendedan 8” minimum length to ensure elementsenses domestic water.Installation• Install the T&P in the run (straight through leg)of a tee located at the domestic hot water out-let. Use a long element T&P relief valve (Figs.1 or 2 page 9).T&P Relief Valve Discharge PipingT&P relief valve discharge piping must be:- made of material serviceable for tempera-tures of 250ºF or greater.- directed so that hot water flows away fromall persons.- directed to a suitable place for disposal.- installed so as to allow complete drainingof the T&P relief valve and discharge line.T&P relief valve discharge piping must not be:- excessively long. Using more than 2elbows or 15 feet of piping can reduce dis-charge capacity.- directly connected to a drain. Terminatedischarge piping within 6” from drain.Refer to local codes.- plugged, reduced or restricted.- subject to freezing.Do not install any valve between T&P reliefvalve and tank connection or on T&P reliefvalve discharge piping. Do not plug T&Prelief valve or discharge piping. Improperplacement and piping of T&P relief valvecan cause severe personal injury, death orsubstantial property damage.CAUTIONNOTICEWARNINGComfort manual _Comfort 55 9/8/14 10:29 AM Page 7