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Marvair Classic AVPA/HVPA/HVPSA Heat Pump I&O Manual
11/2017 Rev. 7
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Chapter 1 - Description & Specifications
1.1 General Description ................................................................................................................................. 5
1.2 Model Identification ................................................................................................................................ 5
1.3 Serial Number Date Code ....................................................................................................................... 6
1.4 Air Flow, Weights and Filter Sizes .......................................................................................................... 6
1.5 General Operation ................................................................................................................................... 7
1.6 Controls - Standard - PC Board ............................................................................................................... 9
1.7 Options .................................................................................................................................................. 14
1.8 Economizer ........................................................................................................................................... 15
Chapter 2 - Installation
2.1 Equipment Inspection ............................................................................................................................ 17
2.2 Installation Requirements ...................................................................................................................... 17
2.3 Installation Materials ........................................................................................................................... 19
2.4 Porting and Duct Work ......................................................................................................................... 21
2.5 Fresh Air Hood Adjustment .................................................................................................................. 22
2.6 Bracket Installation .............................................................................................................................. 22
2.7 Mounting the Unit ................................................................................................................................ 23
2.8 Electrical Connections ........................................................................................................................... 24
Chapter 3 - Start-Up
3.1 Check-Out of Cooling Cycle ................................................................................................................ 27
3.2 Check-Out of Heating Cycle ................................................................................................................. 28
3.3 Discharge Air Adjustment for Modulating Hot Gas Reheat (HGR) Valve ........................................... 28
3.4 Ventilation System Set Up .................................................................................................................... 30
Chapter 4 - Troubleshooting
4.1 Overview ............................................................................................................................................... 32
4.2 Failure Symptoms Guide ....................................................................................................................... 33
4.3 Compressor Troubleshooting ................................................................................................................ 34
4.4 Electric Heat Control ............................................................................................................................. 35
Chapter 5 - Electrical Schematics
5.1 Electrical Schematics ............................................................................................................................ 36
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.
