Bryant 548J*14D installation instructions Table Of Contents, Installation Instructions

Models: 548J*14D

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548J*14D

548J*14D

SINGLE PACKAGE ROOFTOP HEAT PUMP

WITH WITH PURONR (R-410A) REFRIGERANT SIZE 14

Installation Instructions

NOTE: Read the entire instruction manual before starting the installation.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1 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 Step 7 - Convert to Horizontal & Connect Ductwork . 8 Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . . . 8 Economizer Hood Removal and Setup . . . . . . . . . 8 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 . . . . 13 Units with Factory-Installed Disconnect . . . . . . . 13 Convenience Outlets . . . . . . . . . . . . . . . . . . . . . . . 13 Factory-Option Thru-Base Connections . . . . . . . 15 Units without Thru-Base Connections . . . . . . . . . 15 Field Control Wiring . . . . . . . . . . . . . . . . . . . . . . . 15 Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Unit without Thru-Base Conversion Kit . . . . . . . 16 Heat Anticipator Settings . . . . . . . . . . . . . . . . . . . 16 Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Single Point Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Heater Low-Voltage Control Connections . . . . . . 17 Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . . . 18 Differential Enthalpy Control . . . . . . . . . . . . . . . . 18 Return Air Enthalpy Sensor . . . . . . . . . . . . . . . . . 18 RTU-MP Control System . . . . . . . . . . . . . . . . . . . . . . 19 Supply Air Temperature (SAT) Sensor . . . . . . . . . 21 Outdoor Air Temperature (OAT) Sensor . . . . . . . 22 EconoMi$er2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Space Temperature (SPT) Sensors . . . . . . . . . . . . 22 Economizer Controls . . . . . . . . . . . . . . . . . . . . . . 23 Indoor Air Quality (CO2) Sensor . . . . . . . . . . . . . 23 Outdoor Air Quality Sensor . . . . . . . . . . . . . . . . . 24 Connecting Discrete Inputs . . . . . . . . . . . . . . . . . . 24 Communication Wiring - Protocols . . . . . . . . . . . . 25 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Local Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 RTU-MP Troubleshooting . . . . . . . . . . . . . . . . . . 25 Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Smoke Detector Locations . . . . . . . . . . . . . . . . . . . . 28 Supply Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Return Air without Economizer . . . . . . . . . . . . . . 28 Return Air with Economizer . . . . . . . . . . . . . . . . . 28 Step 11 - Adjust Factory-Installed Options . . . . . . . . 32 Step 12 - Install Accessories . . . . . . . . . . . . . . . . . . . 33

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Bryant 548J*14D installation instructions Table Of Contents, Installation Instructions