Carrier COMFORTLink PURON 48PM20 Installation Instructions Manual

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Carrier COMFORTLink PURON 48PM20 Installation Instructions Manual Manual pdf 1 page image

48PM20---28Single Package Rooftop UnitsElectric Cooling/Gas Heating withCOMFORTLinkt Controls and PURONR (R---410A) RefrigerantInstallation InstructionsIMPORTANT: This installation instruction contains basic unitinstallation information including installation of field controldevices. For information on unit start-up, service, and operation,refer to the unit Controls, Start-Up, Operation, Service, andTroubleshooting Instructions also enclosed in the unit literaturepacket.TABLE OF CONTENTSPAGESAFETY CONSIDERATIONS 1. . . . . . . . . . . . . . . . . . . . . . . . .INSTALLATION 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Step 1 -- Provide Unit Support 2. . . . . . . . . . . . . . . . . . . . . . . . .Step 2 -- Remove Shipping Rails 2. . . . . . . . . . . . . . . . . . . . . . .Step 3 -- Rig and Place Unit 2. . . . . . . . . . . . . . . . . . . . . . . . . . .Step 4 -- Field Fabricate Ductwork 9. . . . . . . . . . . . . . . . . . . . . .Step 5 -- Make Unit Duct Connections 9. . . . . . . . . . . . . . . . . . .Step 6 -- Install Flue Hood and Inlet Hood 10. . . . . . . . . . . . . . .Step 7 -- Trap Condensate Drain 10. . . . . . . . . . . . . . . . . . . . . .Step 8 -- Install Gas Piping 11. . . . . . . . . . . . . . . . . . . . . . . . . . .Step 9 -- Orifice Change 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Step 10 -- Make Electrical Connections 12. . . . . . . . . . . . . . . . .Step 11 -- Install Outdoor--Air Hood 18. . . . . . . . . . . . . . . . . . .Step 12 -- Position Optional Power Exhaust orBarometric Relief Damper Hood 19. . . . . . . . . . . . . .Step 13 -- Non--Fused Disconnect 19. . . . . . . . . . . . . . . . . . . . .Step 14 -- Install All Accessories 19. . . . . . . . . . . . . . . . . . . . . .Step 15 -- Configure Controls 19. . . . . . . . . . . . . . . . . . . . . . . .SAFETY CONSIDERATIONSInstallation and servicing of air-conditioning equipment can behazardous due to system pressure and electrical components. Onlytrained and qualified service personnel should install, repair, orservice air-conditioning equipment.Untrained personnel can perform the basic maintenance functionsof replacing filters. All other operations should be performed bytrained service personnel. When working on air-conditioningequipment, observe precautions in the literature, tags and labelsattached to the unit, and other safety precautions that may apply.Follow all safety codes. Wear safety glasses and work gloves. Usequenching cloth for unbrazing operations. Have fire extinguishersavailable for all brazing operations.Recognize safety information. This is the safety--alert symbol .When you see this symbol on the furnace and in instructions ormanuals, be alert to the potential for personal injury.Understand the signal words DANGER, WARNING, andCAUTION. These words are used with the safety--alert symbol.DANGER identifies the most serious hazards which will result insevere personal injury or death. WARNING signifies a hazardwhich could result in personal injury or death. CAUTION is usedto identify unsafe practices which may result in minor personalinjury or product and property damage. NOTE is used to highlightsuggestions which will result in enhanced installation, reliability, oroperation.ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.Before installing or servicing system, always turn off mainpower to system. There may be more than one disconnectswitch.! WARNINGUNIT OPERATION AND SAFETY HAZARDFailure to follow this caution may result in personal injuryor equipment damage.Puronr (R-410A) refrigerant systems operate at higherpressures than standard R-22 systems. Do not use R-22service equipment or components on Puron refrigerantequipment.CAUTION!