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Marvair ComPac AVHDA I&O Manual 03/2019 Rev.3
WARNING
• If the information in these instructions are not followed exactly, a fire may result causing
property damage, personal injury or loss of life.
• Read all instructions carefully prior to beginning the installation. Do not begin
installation if you do not understand any of the instructions.
• Improper installation, adjustment, alteration, service or maintenance can cause property
damage, personal injury or loss of life.
• Installation and service must be performed by a qualified installer or service agency in
accordance with these instructions and in compliance with all codes and requirements
of authorities having jurisdiction.
INSTALLER:
Affix the instructions on the inside of the building adjacent to the
thermostat.
END USER:
Retain these instructions for future reference.
Table of Contents
Chapter 1 Air Conditioner Description & Specifications
1.1 General Description .................................................................................................................................5
1.2 Model Identification .................................................................................................................................5
1.3 Serial Number Date Code ........................................................................................................................5
1.4 Capacities, Weights and Filter Sizes ........................................................................................................6
1.5 General Operation ....................................................................................................................................7
1.6 Electronic Control Board Mode of Operation ..........................................................................................7
1.7 Optional Controls and Packages ..............................................................................................................9
1.8 Electrical Operation .................................................................................................................................9
Chapter 2 Installation
2.1 Equipment Inspection .............................................................................................................................11
2.2 Installation Requirements .......................................................................................................................11
2.3 Installation Materials .............................................................................................................................12
2.4 Porting and Duct Work ..........................................................................................................................14
2.5 Top Flange Installation ..........................................................................................................................14
2.6 Installing the Lifting Brackets ................................................................................................................15
2.7 Mounting the Unit .................................................................................................................................15
2.8 Electrical Connections ...........................................................................................................................16
Chapter 3 Start-Up
3.1 Check-Out of Cooling Cycle .................................................................................................................20
3.2 Check-Out of Heating Cycle ..................................................................................................................20
Chapter 4 Troubleshooting
4.1 Overview ................................................................................................................................................20
4.2 Failure Symptoms Guide ........................................................................................................................21
4.3 Compressor Troubleshooting .................................................................................................................22
4.4 Control Board Diagnosis ........................................................................................................................23
