Camus Hydronics DFH500 Installation, Operation And Service Manual

Also see for DFH1100: Installation, operation and service manual

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Camus Hydronics DFH500 Installation, Operation And Service Manual Manual pdf 13 page image

10condensate neutralization system or a suitable drain fordisposal of condensate that may occur in the vent system.Ensure that the drain from the condensate tee is notexposed to freezing temperature.2.2 CONVENTIONAL VENTING (INDOOR)INSTALLATIONS• NON – CONDENSING• The DynaFlame non-condensing is a category Iappliance and is approved for venting into a commonstandard chimney. If drafts are excessive (abovenegative 0.15 Inches W.C.), install a single actingbarometric damper directly past the appliance’s flueoutlet. This damper will control excessive draft &minimize standby losses.• Multiple appliances may be vented into a conventionalchimney. The chimney must be lined. And a singleacting barometric damper must be provided for eachappliance. Vent diameters are to be increasedaccording to following table 4.Table 4: Vent Size for Conventional ventingModel No.Sidewall,Condensing orOutdoor VentSize, InchConventionalVent size, Inch500 6 8750 8 101100 8 101200 8 101500 10 121750 10 122000 12 142500 12 143000 12 143500 14 164000 14 164500 14 165000 14 16• The chimney must be protected from down drafts, rainand debris by using a listed chimney cap.• If the appliance is located in a room maintained at lowtemperature and is being run for extended periods oftime at low fire it is likely that condensation will beformed in the vent. Consideration must be given toheating the room or providing a special venting systemsimilar to that used for condensing applianceapplication• CONDENSING• The DynaFlame condensing version is a category IIappliance and is approved for venting into a commonChimney. If drafts are excessive (above negative 0.15Inches W.C.), we recommend a single actingbarometric damper.• A qualified professional using a proven vent-sizingprogram with input of accurate operating parametersmust properly do sizing of the venting system. Inapplications where flue gas temperatures are lowerthan can support a Category II with conventionalnegative draft, it will be determined at the ventingdesign stage that a positive pressure will be developedin the vent. It will then be necessary to either provideseparate vents as for Category IV, pressurize the roomor to provide an extractor at the chimney outletinterlocked with the appliance operating circuit in orderto maintain a negative draft in the chimney and allowcommon venting.• Approval of the installation will be at the discretion ofauthorities having jurisdiction.• IN GENERAL• The operation of exhaust fans, compressors, airhandling units etc. can rob air from the room, creatinga negative pressure condition leading to reversal of thenatural draft action of the venting system. Under thesecircumstances an engineered air supply is necessary.• If the appliance is to be installed near a corrosive orpotentially corrosive air supply, the appliance must beisolated from it and outside air should be supplied asper code.• Potentially corrosive atmospheres will result fromexposure to permanent wave solution, chlorinatedwaxes and cleaners, chlorine, water softeningchemicals, carbon tetrachloride, halogen basedrefrigerants, Freon cleaning solvents, hydrochloricacid, cements and glues, masonry washing materials,antistatic fabric softeners, dry cleaning solvents,degreasing liquids, printing inks, paint removers, etc.• The equipment room MUST be provided with properlysized openings to assure adequate combustion air andproper ventilation when the unit is installed with aproper venting system.2.2.1 Air Required For Combustion and VentilationIf air is taken directly from outside the building with no duct,provide two permanent openings:a) Net free area for combustion air opening shall be inaccordance with all applicable codes. In the absence ofsuch codes provide combustion air opening with aminimum free area of one square inch per 7000 Btuhinput (5.5 cm per kW) up to 1,000,000 Btuh and onesquare inch per 14,000 Btuh in excess of 1.000,000Btuh. This opening must be ducted no .higher than 18”nor less than 6” above the floor. Provide a ventilationair opening located as high as practical in the roomsized no less than 10% of the air supply opening.b) Provision for combustion and ventilation must be inaccordance with :• Applicable sections of The National Fuel Gas odeANSI Z223.1• Applicable sections of CAN/CGA B149 installationCodes• Applicable provisions of the local building codes.NOTEOutside air openings shall directly communicate with theoutdoors.CAUTIONUnder no circumstances should the mechanical room everbe under a negative pressure. Particular care should betaken where exhaust fan, attic fans, clothes dryers,compressors, air handling units, etc., may take away airfrom the unit.2.2.2 EXHAUST FANSAny fan or equipment which exhausts air from theequipment room may deplete the combustion air supply