Page 3 of 84
Table of Contents:
SECTION 1: Safety Introduction and Labeling Guide
Warnings, Dangers, Cautions, and Notices ...................5
Label Placement Guide .......................................................... 6
Sample Unit Data Plate............................................................7
SECTION 2: Introduction and Pre-Installation
2.1 Description of Operation ................................................. 8
2.2 Inspection and Setup ....................................................... 8
2.3 Unit Nomenclature Example .........................................9
SECTION 3: Installer Responsibility
Introduction .................................................................................13
3.1 Corrosive Chemicals .........................................................13
3.2 Required Equipment and Materials .........................13
SECTION 4: Critical Considerations
4.1 Required Clearances ........................................................14
4.2 Unit Placement Considerations .................................15
4.3 Hardware ...............................................................................15
SECTION 5: National Standards and Applicable Codes
5.1 Refrigerant Handling Practices ...................................16
5.2 Installation Codes .............................................................16
5.3 Aircraft Hangers .................................................................16
5.4 Parking Structures and Repair Garages ................16
5.5 Electrical ................................................................................16
SECTION 6: Lifting a Packaged Rooftop Unit
6.1 Moving/Lifting The Unit ..................................................17
6.1 Moving the Unit with a Forklift ....................................17
6.1 Lifting the Unit with a Crane .........................................17
SECTION 7: Unit Placement .........................................................21
SECTION 8: Ductwork
Considerations ..........................................................................22
8.1 Return Air Ductwork ........................................................22
8.2 Discharge Ductwork .......................................................22
SECTION 9: Refrigeration Circuits and Piping
9.1 Refrigerant ............................................................................23
9.2 Components and Configurations .............................23
SECTION 10: Energy Recovery/Conservation Wheels
10.1 Principal of Operation....................................................29
SECTION 11: Gas Heater Packages
11.1 Principle of Operation.....................................................30
11.2 Gas Piping and Pressure .............................................30
11.3 Operating and Safety Controls ..................................31
11.4 Wiring .....................................................................................31
11.5 Sequence of Operation..................................................31
SECTION 12: Electric Heater Packages
12.1 Principle of Operation ...................................................38
12.2 Operating and Safety Controls ................................38
12.3 Wiring ...................................................................................38
SECTION 13: Unit Electrical
13.1 Wiring and Electrical Connections ..........................41
13.2 Disconnect ..........................................................................41
13.3 Current Draw .....................................................................41
13.4 Wiring Connections ........................................................41
13.5 Voltage Unbalance .........................................................41
13.5 Low Voltage Wiring ........................................................41
SECTION 14: Sequence of Operation
14.1 Unit Configuration ............................................................51
14.2 Controls Options ..............................................................51
14.3 Basic Sequence of Operation ..................................52
14.4 Accessory Controls Options .....................................52
SECTION 15: Start-Up Procedure
1
5.1 Tools & Supplies Requires ..........................................53
15.2 Pre-Start Checks ............................................................53
15.2 Pre-Start Form .................................................................57
SECTION 16: Start-Up Procedures
Start-Up Form............................................................................60
SECTION 17: Unit Maintenance
Installation Code and Quarterly Inspections .............66
17.1 General ..................................................................................67
17.2 Unit Exterior .......................................................................67
17.3 Direct-Drive Supply and Exhaust Fans ................67
17.4 Condensing Fans ............................................................67
17.5 Refrigeration Circuit Components ..........................67
17.6 Condensate Drain Pan and Drain ...........................67
17.7 Dampers ...............................................................................67
17.8 Electric Heater Wiring and Wiring Conn .............67
17.9 Filters .....................................................................................67
SECTION 18: Replacement Parts .............................................68
SECTION 19: Troubleshooting
Supply Fan....................................................................................71
Compressor ................................................................................ 72
Refrigeration Circuit ............................................................... 74
Variable Speed Head Pressure Control ........................76
Energy Conservation Wheel ...............................................78
Gas Furnace ...............................................................................79
Electric Heater ...........................................................................80
SECTION 20: Addison Warranty ...............................................81
Revision Guide ....................................................................................83
PR Series Installation, Operation, and Maintenance Manual
