Installation Instructions50HTSingle Package RooftopCooling OnlySize 07 with Puronr (R---410A) RefrigerantNOTE: Read the entire instruction manual before startingthe installationTABLE OF CONTENTSSAFETY CONSIDERATIONS 1. . . . . . . . . . . . . . . . . . . .INSTALLATION 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Step 1 -- Plan for Unit Location 5. . . . . . . . . . . . . . . . . .Step 2 -- Plan for Sequence of Unit Installation 5. . . . . .Step 3 -- Inspect Unit 6. . . . . . . . . . . . . . . . . . . . . . . . . . .Step 4 -- Provide Unit Support 6. . . . . . . . . . . . . . . . . . .Step 5 -- Field Fabricate Ductwork 8. . . . . . . . . . . . . . . .Step 6 -- Rig and Place Unit 8. . . . . . . . . . . . . . . . . . . . .Step 7 -- Convert to Horizontal and ConnectDuctwork 9. . . . . . . . . . . . . . . . . . . . . . . . . . . .Step 8 -- Install Outside Air Hood 9. . . . . . . . . . . . . . . .Step 9 -- Install External Condensate Trapand Piping 11. . . . . . . . . . . . . . . . . . . . . . . . . . .Step 10 -- Make Electrical Connections 11. . . . . . . . . . .Step 11 -- Humidi--MiZert —Space RH Controller 37. . . . . . . . . . . . . . . . . .Step 12 -- Adjust Factory--Installed Options 43. . . . . . . .Step 13 -- Install Accessories 43. . . . . . . . . . . . . . . . . . .SAFETY CONSIDERATIONSImproper installation, adjustment, alteration, service,maintenance, or use can cause explosion, fire, electricalshock or other conditions which may cause personalinjury or property damage. Consult a qualified installer,service agency, or your distributor or branch forinformation or assistance. The qualified installer oragency must use factory--authorized kits or accessorieswhen modifying this product. Refer to the individualinstructions packaged with the kits or accessories wheninstalling.Follow all safety codes. Wear safety glasses and workgloves. Use quenching cloths for brazing operations andhave a fire extinguisher available. Read these instructionsthoroughly and follow all warnings or cautions attached tothe unit. Consult local building codes and appropriatenational electrical codes (in USA, ANSI/NFPA 70,National Electrical Code (NEC); in Canada, CSA C22.1)for special requirements.It is important to recognize safety information. This is thesafety--alert symbol . When you see this symbol on theunit and in instructions or manuals, be alert to thepotential for personal injury.Understand the signal words DANGER, WARNING,CAUTION, and NOTE. These words are used with thesafety--alert symbol. DANGER identifies the most serioushazards which will result in severe personal injury ordeath. WARNING signifies hazards which could result inpersonal injury or death. CAUTION is used to identifyunsafe practices, which may result in minor personalinjury or product and property damage. NOTE is used tohighlight suggestions which will result in enhancedinstallation, reliability, or operation.