ACV COMFORT 45 Installation And Maintenance Manual

Contents

ACV COMFORT 45 Installation And Maintenance Manual Manual pdf 24 page image

Water Heater Maintenance22Maintenance ScheduleAnnual service by qualified service technicianshould include the following:Any procedure required by local codes.Check air vent operation.Verify system pressure. Manual air ventingprocedure may require adding water to bringsystem up to pressure, typically 12 psig.Manually operate T&P relief valve at leastonce a year. This will release some hot water.Before operating T&P relief valve, makesure no one is in front of or around T&Prelief valve discharge piping. Hot dischargewater can cause severe personal injury orsubstantial property damage.Move operating lever to open position for afew seconds and then move it back, allowing itto snap closed. After T&P relief valve is oper-ated, if it continues to release water, close coldwater inlet to water heater immediately.Follow draining instructions, to relieve pres-sure from the inner tank and replace T&P reliefvalve. If T&P relief valve weeps periodically,it may be due to thermal expansion seeThermal Expansion, page 6. Do not plug T&Prelief valve or discharge piping.Plugging T&P relief valve or discharge pip-ing can cause excessive pressure in waterheater, resulting in severe personal injury,death, or substantial property damage.Follow instructions on circulator to oil it, ifrequired.Check mixing valve, valves, pipes and fit-tings for leaks.Check function of field-installed controlsand valves. See component manufacturer’sinstructions.Review homeowner’s maintenance responsi-bilities and their frequencies, including anynot listed in the following section.Homeowner monthly maintenance to include:Check for air• Manual air vent - open and close briefly torelease any air.Visually check valves, pipes and fittings forleaks. Call qualified service technician torepair leaks.Filling Water HeaterSee “Filling the Inner (Domestic Water) Tank and“Filling the Outer (Boiler Water) Tank” on page 19.Draining Water HeaterDrain water heater if it will be shut off and exposedto freezing temperatures. Freezing water willexpand and damage water heater.• If boiler water contains sufficientantifreeze, then only the domestic waterneeds to be drained.Close boiler water isolation valves andrelieve system pressure to below 15 psig inouter tank before draining inner tank toprevent damage to inner tank.• If boiler water does not contain sufficientantifreeze, then the boiler water anddomestic water must be drained.If antifreeze is used in boiler water, check concen-tration. Boiler water (including additives) must bepractically non-toxic, having toxicity rating orclass of 1, as listed in Clinical Toxicology ofCommercial Products. A maximum 50/50 mixtureof inhibited propylene glycol is recommended.Follow antifreeze manufacturer’s instruction.WARNINGWARNINGDANGERComfort manual _Comfort 55 9/8/14 10:29 AM Page 24