035-17477-001 Rev. A (801)Unitary Products Group 3VENT SAFETY CHECK PROCEDUREThe following steps shall be followed with each applianceconnected to the venting system placed in operation, whileany other appliances connected to the venting system are notin operation:1. Seal any unused openings in the venting system.2. Inspect the venting system for proper size and horizontalpitch, as required in the National Fuel Gas Code, ANSIZ223.1, or the CAN/CGA B149 Installation Codes andthese instructions. Determine that there is no blockageor restriction, leakage, corrosion or other deficiencieswhich could cause an unsafe condition.3. Insofar as is practical, close all building doors and win-dows and all doors between the space in which the appli-ance(s) is located and other spaces of the building. Turnon clothes dryers. Turn on any exhaust fans, such asrange hoods and bathroom exhausts, so they shall oper-ate at maximum speed. Do not operate a summerexhaust fan. Close fireplace dampers.4. Follow the lighting instructions. Place the appliancebeing inspected in operation. Adjust thermostat so theappliance shall operate continuously.5. Test for draft hood equipped appliance spillage at thedraft hood relief opening after 5 minutes of main burneroperation. Use the flame of a match or candle.6. After it has been determined that each appliance con-nected to the venting system properly vents when testedas outlined above, return doors, windows, exhaust fans,fireplace dampers and any other gas burning applianceto their previous conditions of use.7. If improper venting is observed during any of the abovetests, the venting system must be corrected.8. Any corrections to the common venting system must bein accordance with the National Fuel Gas Code Z223.1or CAN/CGA B149.1 or .2 Installation Code (latest edi-tions). If the common vent system must be resized, itshould be resized to approach the minimum size asdetermined using the appropriate tables in Appendix Gof the above codes.SPECIFIC UNIT INFORMATIONLIMITATIONS & LOCATIONThis furnace should be installed in accordance with allnational and local building/safety codes and requirements, orin the absence of local codes, with the National Fuel GasCode ANSI Z223.1 or CAN/CGA B149.1 or.2 InstallationCode (latest editions), local plumbing or waste water codes,and other applicable codes.Downflow/horizontal models when installed in a downflowconfiguration are AGA/CGA listed for application into a manu-factured (mobile) home.Upflow models or horizontal applications are not approved formobile homes.CLEARANCES FOR ACCESSAmple clearances should be provided to permit easy accessto the unit. The following minimum clearances are recom-mended:1. Twenty-four (24) inches between the front of the furnaceand an adjacent wall or another appliance, when accessis required for servicing and cleaning.2. Eighteen (18) inches at the side where access isrequired for passage to the front when servicing or forinspection or replacement of flue/vent connections.In all cases, accessibility clearances shall take precedenceover clearances for combustible materials where accessibilityclearances are greater.This furnace may not be common vented with anyother appliance, since it requires separate, prop-erly-sized air intake and vent lines. The furnaceshall not be connected to any type of B, BW or Lvent or vent connector, and not connected to anyportion of a factory-built or masonry chimney.If this furnace is replacing a common-vented fur-nace, it may be necessary to resize the existingvent line and chimney to prevent oversizing prob-lems for the new combination of units. Refer to theNational Gas Code (ANSI Z223.1) or CAN/CGAB149.1 or .2 Installation Code (latest editions).Do not install the furnace in an unconditionedspace or garage that could experience ambienttemperatures of 32° F (0° C) or lower. For applica-tion in below freezing locations, See “BELOWFREEZING LOCATIONS” on page 4.The furnace is not to be used for temporary heat-ing of buildings or structures under construction.This unit must be installed in a level (1/4”) positionside-to-side and front-to-back to provide propercondensate drainage.Do not allow return air temperature to be below55°F for extended periods. To do so may causecondensation to occur in the main fired heatexchanger.Only use natural gas in furnaces designed for nat-ural gas. Only use propane (LP) gas for furnacesthat have been properly converted to use propane(LP) gas. Do not use this furnace with butane.Using wrong gas could create a hazard, resultingin damage, injury or death.