Carrier 48MPD Installation, Start-up And Service Instructions Manual

Contents

Carrier 48MPD Installation, Start-up And Service Instructions Manual Manual pdf 1 page image

Installation, Start-Up and ServiceInstructionsCONTENTSPageGENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . 2INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Unit Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Roof Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Slab Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Field-Fabricated Ductwork . . . . . . . . . . . . . . . . . . 3Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . 3Condensate Coil Shipping Covers . . . . . . . . . . 3Install Outdoor Hoods . . . . . . . . . . . . . . . . . . . . . . 3Make Electrical Connections . . . . . . . . . . . . . . . . 14• POWER SUPPLYField Electrical Connections . . . . . . . . . . . . . . . . 14• POWER WIRINGControl Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17• SENSORS• HUMIDITY CONTROL AND HOT WATERAND STEAM VALVES• SPACE TEMPERATURE SENSOR (T55)• SPACE TEMPERATURE SENSOR (T56)(CV Applications Only)• SPACE TEMPERATURE AVERAGING• HEAT INTERLOCK RELAY (VAV Units Only— Not Necessary For DAV Applications)• OPTION AND ACCESSORY CONTROL WIRINGCarrier Comfort Network Interface . . . . . . . . . . 23Air Pressure Tubing . . . . . . . . . . . . . . . . . . . . . . . . 24Gas Piping (48 Series Units Only) . . . . . . . . . . . . 26Installing Flue/Inlet Hoods(48MP Units Only) . . . . . . . . . . . . . . . . . . . . . . . . . 26Fan Isolator Adjustment . . . . . . . . . . . . . . . . . . . . 27Check Compressor Mounting . . . . . . . . . . . . . . . 27Install Accessories . . . . . . . . . . . . . . . . . . . . . . . . . 27PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-38System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Evaporator-Fan Belts, Pulleys,and Sheaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Controls Configuration and Quick Test . . . . . . 35• SUPPLY FAN STATUS SWITCH (FS)• CHECK FILTER SWITCH (CFS)• ENTHALPY CONTROL SET POINT• KEYPAD AND DISPLAY MODULE (HSIO)CONFIGURATION• SET UNIT TYPE• ENTER JOB SET POINT VALUES• CONFIGURE UNIT CONTROLS ANDFUNCTIONS• QUICK TEST FUNCTIONPageGas Pressure Check . . . . . . . . . . . . . . . . . . . . . . . . 38Check Supply Fan Rotation . . . . . . . . . . . . . . . . . 38START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-42Initial Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Operating Sequences . . . . . . . . . . . . . . . . . . . . . . 39• SUPPLY FAN• ECONOMIZER• COOLING (All Units)• OCCUPIED COOLING• UNOCCUPIED COOLING• OVERRIDES• ADAPTIVE OPTIMAL START• ADAPTIVE OPTIMAL STOP(CV Applications Only)• GAS HEATING, OPERATION(48MP Units Only)Control Loop Checkout . . . . . . . . . . . . . . . . . . . . . 41IAQ Control Loop Adjustment . . . . . . . . . . . . . . . 42Lead/Lag Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . 42Final Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42CONTROL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . 42-45General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42• PROCESSOR MODULE NO. 1• PROCESSOR MODULE NO. 2• HIGH-VOLTAGE RELAY MODULES (DSIO)• KEYPAD AND DISPLAY MODULE (HSIO)Default Set Points/Changing Set Points . . . . . 43Motor Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Variable Frequency Drive (VFD) . . . . . . . . . . . . . 43• DISPLAY AND KEYPADSERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45-55Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45• UNIT CONTROL BOX• COMPRESSORS• LIQUID SERVICE VALVES, SOLENOID VALVES,FILTER DRIERS, AND SIGHT GLASSES• EVAPORATOR-FAN MOTORS, PULLEYS, ANDBELTS• POWER EXHAUST MOTORS, PULLEYS, ANDBELTS• GAS HEAT SECTION• UNIT CONTROL BOX• ECONOMIZER DAMPER MOTORS• RETURN-AIR FILTERS• CONDENSER FANS AND FAN MOTORSCleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4648MPD,MPE62L-10R50MP62L-10RSingle Package Electric Cooling Unitsand Gas Heating/Electric Cooling UnitsWith Product Integrated ControlsManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Book 1 1Tab 1a 1bPC 111 Catalog No. 534-893 Printed in U.S.A. Form 48/50MP-1SI Pg 1 12-98 Replaces: 50MP-1SI