Carrier WEATHER MASTER P4 Installation Instructions Manual

Contents

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Catalog No. 04-53480079-01 Printed in U.S.A. Form 48P-4SI Pg 1 11-10 Replaces: 48P-3SIInstallation InstructionsCONTENTSPageGENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .1,2INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68Step 1 — Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . 2Step 2 — Place Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Step 3 — Roof Mount Unit. . . . . . . . . . . . . . . . . . . . . . . . 2Step 4 — Slab Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . 2Step 5 — Install Curb Gasketing. . . . . . . . . . . . . . . . . . 2Step 6 — Install Field-Fabricated Ductwork . . . . . . 2Step 7 — Rig Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Step 8 — Connect Condensate Drain. . . . . . . . . . . . 16Step 9 — Install Outdoor Hoods (Units withoutOptional High-Capacity Power Exhaust). . . . . . 32• UNIT SIZES 030-050• UNIT SIZES 055-100Step 10 — Install Economizer Hoods (Units withOptional High-Capacity Power Exhaust). . . . . . 33• INSTALL SMALL HOODS• INSTALL LARGE HOODSStep 11 — Route Field Wiring . . . . . . . . . . . . . . . . . . . 35• UNIT SIZES 030-060• UNIT SIZES 070-100Step 12 — Make Field Electrical Connections . . . 35• POWER WIRINGStep 13 — Connect Air Pressure Tubing . . . . . . . . 58• VARIABLE FRQUENCY DRIVE• MODULATING POWER EXHAUST• RETURN FAN POWER EXHAUSTStep 14 — Remove Supply-Fan ShippingBrackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60Step 15 — Remove Optional Return-FanShipping Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . 60Step 16 — Connect Gas Piping. . . . . . . . . . . . . . . . . . 61Step 17 — Configure Optional Staged GasControl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Step 18 — Install Flue/Inlet Hoods and Baffles . . 62Step 19 — Install Supply-Air Thermistors(Staged and Modulating Gas Units Only) . . . . . 62Step 20 — Install Optional Motormaster ® VControl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66Step 21 — Install Unit Accessories . . . . . . . . . . . . . . 68CONTROLS INSTALLATION . . . . . . . . . . . . . . . . . . 68-76Constant Volume Units . . . . . . . . . . . . . . . . . . . . . . . . . . 68• CONTROL WIRINGVariable Air Volume (VAV) Units . . . . . . . . . . . . . . . . . 68Optional and Accessory Control Wiring . . . . . . . . . 68Carrier Comfort Network® (CCN) Interface. . . . . . . 73Optional UPC Open Installation . . . . . . . . . . . . . . . . . 74Smoke Control Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . 74GENERALThis installation instruction contains basic unit installationinformation, including installation of thermostats and remotetemperature sensors.For additional information and service instructions, refer tothe Controls and Troubleshooting literature.A factory-installed optional integral economizer and high-capacity power exhaust is available on size 075-100 units.A factory-installed optional return fan is available on size075-100 units.The staged gas control (SGC) option adds the capability tocontrol the rooftop unit’s gas heating system to a specifiedsupply-air temperature set point for purposes of tempering acool mixed-air condition.SAFETY CONSIDERATIONSInstallation and servicing of air-conditioning equipment canbe hazardous due to system pressure and electrical compo-nents. Only trained and qualified service personnel shouldinstall, repair, or service air-conditioning equipment.Untrained personnel can perform basic maintenance func-tions of cleaning coils and filters and replacing filters. Allother operations should be performed by trained service per-sonnel. When working on air-conditioning equipment, observeprecautions in the literature, tags and labels attached to the unit,and other safety precautions that may apply.Follow all safety codes, including ANSI (American Nation-al Standards Institute) Z223.1. Wear safety glasses and workgloves. Use quenching cloth for unbrazing operations. Havefire extinguisher available for all brazing operations.WARNINGBefore performing service or maintenance operations onunit, turn off main power switch to unit. Electrical shockcould cause personal injury.FOR YOUR SAFETYWHAT TO DO IF YOU SMELL GASDo not try to light any appliance. Do not touch any electri-cal switch; do not use any phone in your building. Immedi-ately call your gas supplier from a neighbor’s phone.Follow the gas supplier’s instructions. If you cannot reachyour gas supplier, call the fire department.FOR YOUR SAFETYDo not store or use gasoline or other flammable vapors andliquids in the vicinity of this or any other appliance.WARNINGImproper installation, adjustment, alteration, service, ormaintenance can cause injury or property damage. Refer tothis manual. For assistance or additional information, con-sult a qualified installer, service agency, or the gas supplier.WEATHERMASTER ®48P2,P3,P4,P5030-100Single Package Gas Heating and Electric Cooling Unitswith Direct Spark Ignition and COMFORTLINK™ Controls