Carrier 58CVA Installation, Start-up, Operating And Service And Maintenance Instructions

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Carrier 58CVA Installation, Start-up, Operating And Service And Maintenance Instructions Manual pdf 7 page image

furnace. If the dampers are manually operated, they must beequipped with means to prevent operation of either unit unless thedamper is in the full-heat or full-cool position.AIR FOR COMBUSTION AND VENTILATIONProvisions for adequate combustion and ventilation air must beprovided in accordance with Section 5.3 of the NFGC, Air forCombustion and Ventilation, or applicable provisions of the localbuilding codes.Canadian installations must be installed in accordance with NSC-NGPIC Part 7 and all authorities having jurisdiction.When the furnace is installed in a residential garage, theburners and ignition sources must be located at least 18 inchesabove the floor. The furnace must be located or protected toavoid damage by vehicles. When the furnace is installed in apublic garage, airplane hangar, or other building having ahazardous atmosphere, the furnace must be installed inaccordance with the National Fire Protection Association,Inc. requirements. (See Fig. 6.)Air for combustion must not be contaminated by halogencompounds, which include fluoride, chloride, bromide, andiodide. These elements are found in aerosol sprays, deter-gents, bleaches, cleaning solvents, salts, air fresheners, andother household products.All fuel-burning equipment must be supplied with air for fuelcombustion. Sufficient air must be provided to avoid negativepressure in the equipment room or space. A positive seal must bemade between the furnace cabinet and the return-air duct toprevent pulling air from the burner area and from blocked ventsafeguard opening.The operation of exhaust fans, kitchen ventilation fans,clothes dryers, attic exhaust fans or fireplaces could create aNEGATIVE PRESSURE CONDITION at the furnace.Make-up air MUST be provided for the ventilation devices, inaddition to that required by the furnace.The requirements for combustion and ventilation air depend uponwhether the furnace is located in an unconfined or confined space.Step 1—Unconfined SpaceAn unconfined space has a volume of at least 50 cu ft for each1000 Btuh total input for all appliances (furnaces, clothes dryers,water heaters, etc.) in the space.For example:If the unconfined space is constructed unusually tight, air forcombustion and ventilation must come from either the outdoors orspaces freely communicating with the outdoors. Combustion andFig. 4—Multipoise OrientationsA02097THE BLOWER IS LOCATEDTO THE RIGHT OF THEBURNER SECTION, ANDAIR CONDITIONED AIR ISDISCHARGED TO THE LEFT.THE BLOWER ISLOCATED BELOW THEBURNER SECTION, ANDCONDITIONED AIR ISDISCHARGED UPWARD.THE BLOWER ISLOCATED ABOVE THEBURNER SECTION, ANDCONDITIONED AIR ISDISCHARGED DOWNWARDTHE BLOWER ISLOCATED TO THE LEFTOF THE BURNER SECTION,AND CONDITIONED AIR ISDISCHARGED TO THE RIGHT.Fig. 6—Installation in a GarageA9304418-IN. MINIMUMTO BURNERSFURNACEINPUT (BTUH)MINIMUM WITH7–1/2 FT CEILING (SQ. FT.)66,000 44188,000 587110,000 734132,000 881154,000 10286