Marvair ComPac Installation & Operation Manual
12/2017 Rev.16
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 ComPac Description & Specifications
1.1 General Description .................................................................................................................................5
1.2 Model Identification .................................................................................................................................5
1.3 Serial Number Date Code ........................................................................................................................5
1.4 Air Flow, Weights and Filter Sizes ...........................................................................................................6
1.5 General Operation ....................................................................................................................................6
1.6 Electronic Control Board Mode of Operation ..........................................................................................7
1.7 Optional Controls and Packages ..............................................................................................................9
1.8 Electrical Operation ...............................................................................................................................11
1.9 Economizer Components .......................................................................................................................18
Chapter 2 Installation
2.1 Equipment Inspection .............................................................................................................................22
2.2 Installation Requirements .......................................................................................................................22
2.3 Installation Materials .............................................................................................................................24
2.4 Porting and Duct Work ..........................................................................................................................25
2.5 Fresh Air Hood Installation ...................................................................................................................28
2.6 Bracket Installation ...............................................................................................................................28
2.7 Mounting the Unit .................................................................................................................................28
2.8 Vertical Economizer and Gravity Dampers (HVESA 36 & 60 Models Only) .......................................30
2.9 Electrical Connections ...........................................................................................................................31
Chapter 3 Start-Up
3.1 Check-Out of Cooling Cycle .................................................................................................................35
3.2 Check-Out of Heating Cycle ..................................................................................................................35
Chapter 4 Troubleshooting
4.1 Overview ................................................................................................................................................36
4.2 Failure Symptoms Guide ........................................................................................................................36
4.3 Compressor Troubleshooting .................................................................................................................37
4.4 Control Board Diagnosis ........................................................................................................................38
