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548J*14D
SINGLE PACKAGE ROOFTOP
HEAT PUMP
WITH WITH PURON
R
(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 (CO
2
)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...................