Carrier 50HCQA installation instructions Table Of Contents, Installation Instructions

50HCQA

Single Package Rooftop

Heat Pump

with Puronr (R---410A) Refrigerant Sizes 04 --- 06

Installation Instructions

NOTE: Read the entire instruction manual before starting the installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 2 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . . . 4 Roof Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Step 2 - Plan for Sequence of Unit Installation . . . . . . 5 Curb-Mount Installation . . . . . . . . . . . . . . . . . . . . . 5 Pad-Mount Installation . . . . . . . . . . . . . . . . . . . . . . 5 Frame-Mount Installation . . . . . . . . . . . . . . . . . . . . 5 Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . . . 5 Roof Curb Mount . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Slab Mount (Horizontal Units Only) . . . . . . . . . . . 5 Alternate Unit Support . . . . . . . . . . . . . . . . . . . . . . 5 Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . . . . 7 For Units with Accessory Electric Heaters . . . . . . 7 Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 7 Positioning on Curb . . . . . . . . . . . . . . . . . . . . . . . . 8 Step 7 - Convert to Horizontal & Connect Ductwork . . 8 Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . . . 9 Economizer Hood Removal and Setup . . . . . . . . . 9 Two Position Damper Hood Removal and Setup . . . 9 Economizer Hood and Two-Position Hood . . . . . 10 Step 9 - Install External Condensate Trap and Line . . . 10 Step 10 - Make Electrical Connections . . . . . . . . . . . 11 Field Power Supply . . . . . . . . . . . . . . . . . . . . . . . . 11 Units without Factory-Installed Disconnect . . . . 11 Units with Factory-Installed Disconnect . . . . . . . 12 Convenience Outlets . . . . . . . . . . . . . . . . . . . . . . . 12 Factory-Option Thru-Base Connections . . . . . . . 13 Units without Thru-Base Connections . . . . . . . . . 14 Field Control Wiring . . . . . . . . . . . . . . . . . . . . . . . 14 Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Unit without Thru-Base Connection Kit . . . . . . . 14 Heat Anticipator Settings . . . . . . . . . . . . . . . . . . . 14 Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Single Point Boxes and Supplementary Fuses . . . . . 16 PremierLinkt (Factory Option) . . . . . . . . . . . . . . . . . 17 Supply Air Temperature (SAT) Sensor . . . . . . . . . 17 Outdoor Air Temperature (OAT) Sensor . . . . . . . 19 EconoMi$ert2 . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Space Temperature (SPT) Sensors . . . . . . . . . . . . 19 Connect Thermostat . . . . . . . . . . . . . . . . . . . . . . . 19 Configure the Unit for Thermostat Mode . . . . . . 22 Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . 22 Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . 22 Differential Enthalpy Control . . . . . . . . . . . . . . . . 22 Return Air Enthalpy Sensor . . . . . . . . . . . . . . . . . 22 Indoor Air Quality (CO2 sensor) . . . . . . . . . . . . . 22 Outdoor Air Quality Sensor . . . . . . . . . . . . . . . . . 23 Smoke Detector/Fire Shutdown (FSD) . . . . . . . . . 23 Filter Status Switch . . . . . . . . . . . . . . . . . . . . . . . . 24 Supply Fan Status Switch . . . . . . . . . . . . . . . . . . . 24 Remote Occupied Switch . . . . . . . . . . . . . . . . . . . 24 Space Relative Humidity Sensor . . . . . . . . . . . . . 24 Power Exhaust (output) . . . . . . . . . . . . . . . . . . . . . 24 CCN Communication Bus . . . . . . . . . . . . . . . . . . 24 RTU-MP Control System . . . . . . . . . . . . . . . . . . . . . . 26 Supply Air Temperature (SAT) Sensor . . . . . . . . . 28 Outdoor Air Temperature (OAT) Sensor . . . . . . . 28 EconoMi$ert2 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Space Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . 29 Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . 29 Differential Enthalpy Control . . . . . . . . . . . . . . . . 29

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