Marvair MAA/MGA Wall Mount AC Installation & Operation Manual
05/2023 Rev.21
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 Marvair Wall Mount Air Conditioner Description & Specifications
1.1 General Description .................................................................................................................................5
1.2 Model Identification .................................................................................................................................6
1.3 Serial Number Date Code ........................................................................................................................7
1.4 Air Flow, Weights and Filter Sizes ...........................................................................................................7
1.5 General Operation ....................................................................................................................................7
1.6 Optional Controls and Packages ..............................................................................................................8
1.7 Electrical Operation ...............................................................................................................................11
Chapter 2 Electronic Control Board
2.1 Introduction ............................................................................................................................................17
2.2 Installation and Replacement .................................................................................................................18
2.3 PCB Details and Information .................................................................................................................18
2.4 Operation ................................................................................................................................................22
2.5 Sequence of Operation ...........................................................................................................................22
Chapter 3 Installation
3.1 Equipment Inspection .............................................................................................................................34
3.2 Installation Requirements .......................................................................................................................34
3.3 Installation Materials .............................................................................................................................36
3.4 Porting and Duct Work ..........................................................................................................................37
3.5 Fresh Air Hood Installation ...................................................................................................................38
3.6 Bracket Installation ...............................................................................................................................39
3.7 Mounting the Unit .................................................................................................................................39
3.8 Electrical Connections ...........................................................................................................................40
Chapter 4 Start-Up
4.1 Check-Out of Cooling Cycle .................................................................................................................44
4.2 Check-Out of Heating Cycle ..................................................................................................................44
