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Addison PR Series - User Manual

Addison PR Series
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NOT FOR RESIDENTIAL USE
NOTICE
Installer:
Please take the time to read and understand the
instructions contained inside this manual prior to
any installation. The installer must give a copy of this
manual to the unit owner.
Owner:
Keep this manual in a safe place in order to provide
service technicians with necessary unit information.
Packaged
Rooftop DOAS &
Recirculation Unit
Installation, Operation,
& Maintenance Manual
PR**036 PR**048
PR**060 PR**072
PR**084 PR**096
PR**120 PR**150
PR**180 PR**210
PR**240 PR**300
PR**360 PR**420
PR**480 PR**540
PR**600 PR**720
PR**780 PR**840
PR Series

Table of Contents

Questions and Answers

  • B
    Bryan MillerSep 1, 2025
    What causes noisy operation in Addison PR?
    • M
      Matthew CampbellSep 1, 2025
      Noisy operation in your Addison Air Conditioner can be attributed to a few common issues. High air velocity through the ductwork can create air noise, so check the ductwork. A chattering contactor may indicate inadequate control voltage or shorts/breaks, so check the control voltage, thermostat, and contactor points. Tubing rattle can also contribute to noise, so dampen by taping or clamping, and bend tubing away from contact where possible.
  • M
    Michael HowardSep 10, 2025
    Why Addison Air Conditioner heater cycling on automatic limit?
    • R
      Ryan BoydSep 12, 2025
      If your Addison Air Conditioner heater is cycling on automatic limit, check for obstructions to return air, loose or broken fan belt and clogged filters and/or evaporator coils. Test and, if necessary, replace the faulty temperature limit switch.
  • D
    Daniel EdwardsAug 30, 2025
    What causes suction pressure to be too low in Addison PR?
    • D
      dwestAug 30, 2025
      If the suction pressure is too low in your Addison Air Conditioner, it could be due to several reasons. Check pressures and subcooling to see if the unit is undercharged with refrigerant. Ensure the blower is not running backwards by interchanging any two wires connected to the motor. Inspect the expansion valve for defects or improper adjustment, checking superheat and adjusting the TXV as needed. A dirty filter can also cause this issue, so check the filter and evaporator coil. Too little airflow or low entering air temperature can be factors, so check airflow and entering air wet bulb conditions. Finally, look for any restrictions in the suction or liquid line.
  • J
    Jennifer LewisNov 24, 2025
    What to do if Addison PR Air Conditioner compressor starts but cuts out on high pressure switch?
    • L
      Lauren MillsNov 24, 2025
      If the compressor in your Addison Air Conditioner starts but then cuts out due to the high-pressure switch, consider these potential causes: the refrigerant may be overcharged, so check pressures and charge by subcooling; the condenser fan control may have an incorrect setting, so check the calibration of the low ambient control; the fan motor may be defective, so check it; the condenser coil inlet may be obstructed or dirty, so check the coil and inlet clearances, and for possible air re-circulation; there may be air or non-condensables in the system, so compare liquid refrigerant pressure with the saturated pressure; the high-pressure switch may be defective, so replace it; there may be a restriction in the discharge or liquid line, so check discharge and liquid line pressures, and check...
  • M
    mzimmermanSep 12, 2025
    What to do if Addison PR has open secondary protective device?
    • S
      Sabrina MartinSep 12, 2025
      If your Addison Air Conditioner has an open secondary protective device, check the contactor.
  • K
    Kyle ConwaySep 16, 2025
    What causes erratic fan operation in Addison PR Air Conditioner?
    • E
      Emily BellSep 16, 2025
      If your Addison Air Conditioner is experiencing erratic fan operation, the control may not be wired correctly. Additionally, the condenser coil may be dirty or blocked.
  • M
    madeline26Sep 23, 2025
    What does two flashes mean on my Addison PR Air Conditioner?
    • M
      Michelle HayesSep 23, 2025
      If your Addison Air Conditioner shows two flashes indicating flame with no call for heat, the gas valve may be faulty.
  • D
    Dr. Jacqueline HartAug 27, 2025
    How to reduce excessive fan noise in Addison PR Air Conditioner?
    • J
      joyperezAug 27, 2025
      Excessive fan noise in your Addison Air Conditioner can be caused by several issues. The fan bearing may need replacement. If the fan wheel is loose on the shaft, reposition and re-tighten it. If the fan wheel is rubbing, loosen the setscrews, reposition the cone, and then tighten. A dirty fan wheel should be cleaned. Loose ducts should be tightened or reinforced. Finally, remove any foreign articles from the fan or duct.
  • L
    Lisa WheelerAug 27, 2025
    What causes Addison PR compressor to cut out on thermal overload?
    • N
      Natalie GlennAug 27, 2025
      If the compressor of your Addison Air Conditioner cuts out on thermal overload, several factors could be responsible. Begin by checking the incoming voltage to ensure all three legs are within 10% of the required voltage, with leg-to-leg average voltage variation less than 2% on each leg. Determine if the issue is sustained high discharge pressure. High suction and discharge pressures can also cause this problem. If the compressor is hot, allow it to cool for two hours and recheck for an open circuit. Check the run capacitor for the compressor and fan motor, and verify the refrigerant charge by checking subcooling. Low oil level can also cause the compressor to cut out.
  • K
    Kristine WareAug 26, 2025
    Why does my Addison PR Air Conditioner compressor start but cut out on low pressure switch?
    • R
      Richard LeeAug 26, 2025
      If the compressor starts but cuts out on the low-pressure switch in your Addison Air Conditioner, it could be due to several reasons. Check the sight glass and pressures to see if the unit is low on refrigerant. Inspect for restricted airflow caused by a dirty evaporator coil, dirty filters, closed dampers, an iced evaporator, or incorrect VFD settings. Also, look for restrictions in the liquid line by checking the head pressure and the pressure drop across the filter drier. Finally, verify the calibration of the low-pressure switch.

Summary

Safety Introduction and Labeling Guide

Introduction and Pre-Installation

Description of Operation

Overview of the PR Series unit's functions and capabilities.

Inspection and Setup

Procedures for inspecting the unit upon receipt and initial setup.

Unit Nomenclature Example

Installer Responsibility

Corrosive Chemicals

Information on handling and avoiding corrosive chemicals near the unit.

Required Equipment and Materials

List of tools and materials needed for installation and start-up.

Critical Considerations

Required Clearances

Specifies minimum distances from objects for service access and operation.

National Standards and Applicable Codes

Refrigerant Handling Practices

Guidelines for handling refrigerants according to national and local codes.

Fuel Codes

Requirements for fuel type and installation based on codes.

Installation Codes

Standards for installing air conditioning and ventilation systems.

Aircraft Hangars

Codes applicable for installation in aircraft hangars.

Parking Structures and Repair Garages

Codes applicable for installation in garages.

Electrical

Requirements for electrical connections and compliance with codes.

Venting

Requirements for venting optional gas furnaces according to codes.

High Altitude

Information on approved installations at high altitudes.

Lifting a Packaged Rooftop Unit

Moving;Lifting an Air Conditioning Unit

Procedures for safely moving and lifting the unit.

Preparation for Moving;Lifting

Steps to take before moving or lifting the unit for safety.

Moving with a Forklift

Guidelines for safely moving the unit using a forklift.

Lifting with a Crane

Instructions for safely lifting the unit using crane equipment.

Unit Placement

Roof Installation on Curb

Instructions for installing the unit on a roof curb.

Roof Curb Assembly and Installation

Steps for assembling and installing the roof curb.

Unit Mounting to Roof Curb

Procedure for mounting the unit onto the installed roof curb.

Unit Mounting to Ground Pad

Instructions for mounting the unit on a ground pad.

Ductwork Consideration

Inlet Ductwork

Specifications for inlet ductwork size and air quality.

Return Air Ductwork

Specifications for return air ductwork size.

Discharge Ductwork

Specifications for discharge ductwork size.

Refrigeration Circuits and Piping

Refrigerant

Details on the R-410A refrigerant and POE oil used in the unit.

Components and Configurations

Lists common components and variations in refrigeration circuits.

Energy Recovery;Conservation Wheels

Principal of Operation

Explains the operation of the energy conservation wheel module.

Gas Heater Packages

Principle of Operation

Overview of the 80% efficient self-contained duct gas furnace.

Gas Piping and Pressure

Requirements for gas piping and pressure compliance.

Operating and Safety Controls

Wiring

Sequence of Operation

Sequence of Operation for Modulating Furnace

Electric Heater Packages

Principle of Operation

Overview of the self-contained duct electric heater.

Operating and Safety Controls

Details safety systems and operating controls for electric heaters.

Wiring

Electrical wiring and connection requirements for electric heaters.

Unit Electrical

Wiring and Electrical Connections

Guidelines for all electrical wiring and connections, including grounding.

Disconnect

Requirements for external weather-tight disconnect switches.

Current Draw

Information on unit current draw requirements.

Wiring Connections

Instructions for connecting main power wiring.

Voltage Unbalance

Checks for voltage and phase unbalance and how to calculate it.

Low Voltage Wiring

Table listing minimum 24-volt class 2 wire sizes for different runs.

Phase Monitor Data

Purpose of the Phase Monitor

Monitors line voltage and phase for system protection.

Phase Monitor Operation

How the DPM functions when voltages are within parameters.

Custom Set-Up

Using membrane buttons to change set-up criteria.

Sequence of Operation

Unit Configuration

How unit functionality is achieved based on application.

Controls Options

Overview of different control options available for the unit.

ALC DDC Controller with Sensors

Details on the factory-mounted ALC DDC controller.

Factory-Mounted DDC Controls (by others)

DDC controls mounted by factory per customer specifications.

Terminal Strip for Field-Mounted DDC Controls

Connecting field-supplied DDC controls to a terminal strip.

Terminal Strip for Electromechanical Controls

Connecting thermostats to factory-wired terminal strips.

Start-Up Procedure

Installation Code and Maintenance Requirements

Ensuring installation and service comply with codes and manuals.

Tools & Supplies Required

List of essential tools and supplies for unit start-up.

Ductwork and Electrical Connections

Checks for proper ductwork and electrical connections before start-up.

Pre-Start Checklist

Start-Up Notes

Important notes for the start-up technician.

Start-Up Form

General Information

Application Information

Unit Nameplate Information

Unit Information

Start-Up Check

Cooling Check

Cooling Check (Continued)

Heating Check

Energy Conservation Wheel Data

Unit Maintenance

Installation Code and Quarterly Inspections

Ensuring installation and service comply with codes and manuals.

Maintenance Guidelines

General Maintenance

General maintenance checks and follow-up on start-up procedures.

Unit Exterior Maintenance

Cleaning and inspecting the unit's exterior.

Supply and Exhaust Fan Maintenance

Inspection and maintenance of supply and exhaust fan motors.

Condensing Fan Maintenance

Checking condensing fan assemblies for free movement and tight hardware.

Refrigeration Circuit Maintenance

Cleaning evaporator and condenser coils, checking compressors.

Condensate Drain Pan and Drain Maintenance

Checking and cleaning condensate drain pans and drains.

Damper Maintenance

Cleaning damper blades and checking linkages.

Electric Heater Wiring Maintenance

Checking wiring connections and heating elements.

Filter Maintenance

Checking filters for dirt restriction and replacing as needed.

Replacement Parts

Troubleshooting

Addison Warranty

Addison Warranty (Continued)

Revision Guide

Addison PR Series Specifications

General IconGeneral
BrandAddison
ModelPR Series
CategoryAir Conditioner
LanguageEnglish

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