Manual 2100-422Page 2INSTALLATION and OPERATING INSTRUCTIONSEQUIPMENT SELECTIONAn accurate heating load calculation must be conductedusing American Society of Heating, Refrigeration andAir Conditioning Engineers (ASHRAE) or AirConditioning Contractors of America (ACCA) manuals.Do not add a large safety factor above the calculatedvalue. If the calculated heating load requirementexceeds the heating capacity rating of a given model,use only the next larger size available. Never increaseby any more than absolutely necessary based uponavailable equipment heating capacities. Always selectbased upon heat capacity (output), never use inputcapacities.NOTE: It is the personal responsibility andobligation of the purchaser to contract aqualified installer to assure that installationis adequate and is in conformance withgoverning codes and ordinances.LOCATING THE FURNACEWhen installing the furnace be sure to provide adequatespace for easy service and maintenance. Locate thefurnace as close to the chimney as practical, givingconsideration to the accessibility of the oil burner,controls, and blower for service. Allow a minimum of24 inches at front of furnace for servicing oil burner.Allow adequate room for filter and blowermaintenance. Clearance from combustible material asstated on the furnace and repeated in Table 1 must bemaintained. For damp basement installations, a raisedconcrete pad is recommended. This will help keep thebottom of the furnace dry and reduce the risk of rusting.An oil burner must have a generous supply ofcombustion air to operate properly. The flow ofcombustion and ventilating air must not be obstructedfrom reaching the furnace. See “Combustion AirRequirements” section.The furnace area must be kept clear and free ofcombustible materials, gasoline and other flammablevapors and liquids.This unit is not designed for mobile home or trailerinstallations. Always install furnace in a level position.j For the first three (3) feet from plenum. After three (3) feet, no clearance required.C Combustible flooringNC Noncombustible floor* Maintained on one side or the other to achieve filter access and/or blower service.** Floor must be noncombustible. For furnace only installation can be installed on combustibleflooring only when installed on special base part no. CFB7 available from factory. When airconditioning coil cabinet DCB23-22 is used then use special base part no. CFB23.TABLE 1MINIMUM CLEARANCESledoMsehcnIósecanraelCnoitallatsnImuminiM ecivreSmuminiMsecnaraelCecanruF munelP 1tcuDeulFepiP roolFtnorF kcaB sediS poT sediS tnorF kcaB sediSE63D580HFE84D011HFE06D011HF444111222222222222999CCC424242óóóóóóE63D580FLFE63D580RLFE84D011FLFE06D011FLF66660810022222222222222229999CNCNCNCN4242424242424242*81*81*81*81E84D011RLFE06D011RLFE06D041RLFE63D580CF6666818181122222222222222229999CNCNCNCN **42424242424242ó*81*81*81ó