Camus Hydronics DRH300 Installation, Operation And Service Manual

Contents

Camus Hydronics DRH300 Installation, Operation And Service Manual Manual pdf 63 page image

5710.4.1 CONDENSATE VOLUMEThere are several factors affecting the amount ofcondensation created by the appliance however for roughapproximation use.Condensation Volume, US Gallon/Hr = Input, MBH/1000 x5.0Many codes will require the acidic condensate to beneutralized before it can be placed in a drain system. Aneutralizer to control the pH of the liquid discharged to adrain system is recommended with every appliance. Theneutralizer consists of an industrial grade, non-corrosivereservoir for collection of the condensate. As the reservoirfills, it provides an extended residency time to neutralize thecondensate. The neutralized condensate exits from thereservoir outlet. A ‘P’ trap is installed upstream ofneutralizer at the heat exchanger. Prime the installedassembly with water to prevent flue gas spillage from thedrain. Use standard ½" vinyl, PVC, CPVC or suitable hoseto run to floor drain.When the condensate level in the reservoir rises to thedrain, it spills out into the condensate bin and from thereexits to the external neutralizer. As the pH numberincreases in numerical value, the relative acidity of thedischarge decreases. The neutralized condensate maythen be discharged into a suitable drain system without fearof damage to the drain system. Always check with localcodes for specific pH requirements. Neutralizers may beused in series to raise pH.The condensate collection box supplied with theDynaforce® is supplied with an initial charge of neutralizermedium. This neutralizer medium is expected to lastapproximately 3 to 6 months depending on the amount ofcondensate produced. Neutralizer refills are available fromCamus®.10.5 BURNER MAINTENANCEThe burner should be removed for inspection and cleaningon an annual basis. An appliance installed in a dust or dirtcontaminated environment will require inspection andcleaning on a more frequent schedule. The fan assistedcombustion process may force airborne dust and dirtcontaminants, contained in the combustion air, into theburner. With sustained operation, non-combustiblecontaminants may reduce burner port area, reduce burnerinput or cause non-warrantable damage to the burner.Airborne contaminants such as dust, dirt, concrete dust ordry wall dust can be drawn into the burner with thecombustion air and block the burner port area. An externalcombustion air filter is provided with the appliance. Anadditional filter is located at the fan inlet (DR1200 – 5000)and like the external filter may be washed in the sink underthe tap. This internal filter should be checked and cleanedat the time of appliance commissioning and on a six monthinterval or more often in a contaminated environment.10.5.1 BURNER REMOVALAccess to the burner will require the following steps:• Turn off main electrical power to the appliance.• Turn off main manual gas shutoff to theappliance• Remove the top cover.• Disconnect the gas supply connection to the faninlet.• Disconnect the fan motor power wires at theharness.• Remove the hot surface igniter and the flamesensor.• Remove the sensing tubes from the air ratio gasvalve to the combustion air fan.• Remove the 4 nuts holding the fan assembly tothe heat exchanger and remove the fan assembly.On occasion the red silicone gasket may adhere tothe underside of the fan’s flange. Carefully pry theflange away from the gasket prior to removing thefan assembly.• The burner can now be lifted vertically out of theheat exchanger cavity. A graphite-backed ceramicpaper gasket is located directly under the burnerflange. This gasket must be replaced if it isdamaged.• Use care to prevent damage to the knitted metalfiber of the burner surface.• Check all gaskets and replace as necessary.Gaskets affected by heat will not reseal properlyand must be replaced.• Replace the burner in the reverse order that it wasremoved. Insert the igniter and sensor beforedoing the final tightening on the fan mounting nuts.Evenly tighten the nuts to 20 ft-lbs (models 300 –1000) and 25 ft-lbs (models 1200 – 5000)NOTE:When the combustion air fan is removed for any reason,the inlet to the burner must be covered to prevent furtherforeign objects from falling into the burner. Always lookinside the burner to check for dents. Do not place a burnerback into operation if the inner distribution screen has beendented during the service operation, call the factory forrecommendations. Use care when removing and handlingthe burner, Sharp objects or impact may damage or tearthe metal fiber surface rendering the burner unfit forservice.10.5.2 BURNER CLEANING PROCEDURERemove any visible dust or dirt blockage from the surfaceof the burner using water from a garden house. Wash theburner with low pressure water. Never wipe or brush thesurface of the burner nor use high pressure water or air.The burner may best be cleaned by immersing the burnerport area in a solution of dishwashing detergent and hotwater. Allow the burner to remain in the solution for ashort period of time to remove dust, dirt and oil or greaseladen contaminants. Rinse the burner thoroughly withclean water to remove any residue from the detergentcleaner. The burner should be air dried after removalfrom the cleaning solution and rinsing. DO NOT usechlorine based solvents or cleaning agents on the burner.