Airxcel Marvair ComPac I User manual

MODELS:
AVPA 12-20-24-30-36-42-48-60-72
HVEA 24-30-36-42-49-60
AVHA 12-20-24-30-36-42-48-60
HVESA 36-42-49-60
AVHSA72
Installation & Operation Manual
9-11 EER Vertical Wall-Mount Air Conditioners
Manufactured By:
A Division of the AIRXCEL®Commercial Group
P.O. Box 400 • Cordele, Georgia 31010 • 156 Seedling Drive • Cordele, Georgia 31015
[phone] • Fax [phone]
E-mail: [e-mail] • Internet: www.Marvair.com
The most current version of this manual can be found at www.Marvair.com.
IMPORTANT
This manual may include information for options and features which may not be
included on the unit being installed. Refer to the unit data label or Model Identication
to determine which features and options this unit is equipped with.
INSTALLER: Afx the instructions on the inside of the building adjacent to the thermostat.
END USER: Retain this manual for future reference.
Marvair ComPac Installation & Operation Manual 08/2018 Rev.19
Part #01655
Air Conditioner Product Manual
Vertical Wall-Mount Air Conditioners
with Front Control Box Panel

2
Marvair ComPac Installation & Operation Manual
08/2018 Rev.19
How To Use This Manual
This manual is intended to be a guide to Marvair ComPac family of vertical air conditioners. It contains installation,
troubleshooting, maintenance, warranty, and application information. The information contained in this manual is to be
used by the installer as a guide only. This manual does not supersede or circumvent any applicable national or local codes.
If you are installing the ComPac unit, rst read Chapter 1 and scan the entire manual before beginning the installation as
described in Chapter 2. Chapter 1 contains general, descriptive information and provides an overview which can speed
up the installation process and simplify troubleshooting.
If a malfunction occurs, follow this troubleshooting sequence:
1. Make sure you understand how the ComPac unit works (Chapters 1 & 3).
2. Identify and correct installation errors (Chapter 2).
3. Refer to the troubleshooting information in Chapter 4.
If you are still unable to correct the problem, contact the Factory at 1-800-841-7854 for additional assistance.
Please read the following “Important Safety Precautions” before beginning any work.
Important Safety Precautions
1. USE CARE when LIFTING or TRANSPORTING equipment.
2. TRANSPORT the UNIT UPRIGHT. Laying it down on its side may cause oil to leave the compressor and breakage
or damage to other components.
3. TURN ELECTRICAL POWER OFF AT THE breaker or fuse box BEFORE installing or working on the equipment.
LINE VOLTAGES ARE HAZARDOUS or LETHAL.
4. OBSERVE and COMPLY with ALL applicable PLUMBING, ELECTRICAL, and BUILDING CODES and ordinances.
5. SERVICE may be performed ONLY by QUALIFIED and EXPERIENCED PERSONS.
* Wear safety goggles when servicing the refrigeration circuit
* Beware of hot surfaces on refrigerant circuit components
* Beware of sharp edges on sheet metal components
* Use care when recovering or adding refrigerant
6. Use COMMON SENSE - BE SAFETY-CONSCIOUS
This is the safety alert symbol . When you see this symbol on the ComPac unit and in the instruction manuals
be alert to the potential for personal injury. Understand the signal word DANGER, WARNING, CAUTION and
IMPORTANT. These words are used to identify levels of the seriousness of the hazard.
DANGER Failure to comply will result in death or severe personal injury and/or property damage.
WARNING Failure to comply could result in death or severe personal injury and/or property damage.
CAUTION Failure to comply could result in minor personal injury and/or property damage.
IMPORTANT Used to point out helpful suggestions that will result in improved installation, reliability or
operation.
© 08/2018 Marvair, Division of Airxcel, Inc.
AS PART OF THE MARVAIR CONTINUOUS IMPROVEMENT PROGRAM, SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.

Marvair ComPac Installation & Operation Manual
08/2018 Rev.19
3
WARNING
• If the information in these instructions are not followed exactly, a re 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 qualied installer or service agency in
accordance with these instructions and in compliance with all codes and requirements
of authorities having jurisdiction.
INSTALLER: Afx 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 & Specications
1.1 General Description .................................................................................................................................5
1.2 Model Identication .................................................................................................................................5
1.3 Serial Number Date Code ........................................................................................................................5
1.4 Air Flow, 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 ...............................................................................................................................11
1.9 Economizer Components .......................................................................................................................19
Chapter 2 Installation
2.1 Equipment Inspection.............................................................................................................................23
2.2 Installation Requirements.......................................................................................................................23
2.3 Installation Materials .............................................................................................................................25
2.4 Porting and Duct Work ..........................................................................................................................26
2.5 Fresh Air Hood Installation ...................................................................................................................29
2.6 Bracket Installation ...............................................................................................................................29
2.7 Mounting the Unit .................................................................................................................................29
2.8 Vertical Economizer and Gravity Dampers (HVESA 36 & 60 Models Only).......................................31
2.9 Electrical Connections ...........................................................................................................................32
Chapter 3 Start-Up
3.1 Check-Out of Cooling Cycle .................................................................................................................36
3.2 Check-Out of Heating Cycle..................................................................................................................36
Chapter 4 Troubleshooting
4.1 Overview ................................................................................................................................................37
4.2 Failure Symptoms Guide........................................................................................................................37
4.3 Compressor Troubleshooting .................................................................................................................38
4.4 Control Board Diagnosis........................................................................................................................39

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Marvair ComPac Installation & Operation Manual
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Table of Contents
Chapter 5 Maintenance
5.1 Scheduled Maintenance .........................................................................................................................40
Chapter 6 Warranty
6.1 Airxcel Commercial Group Limited Product Warranty.........................................................................41
Parts List and Exploded Views .....................................................................................................................42
Appendix A
Installation Instructions for Field Installed Electric Heaters ...........................................................................43
Illustrations
Figure 1a. Typical Electrical Schematic - Model AVPA & AVHA..............................................................12
Figure 1b. Typical Electrical Schematic - Model AVPA & AVHA..............................................................13
Figure 1c. Typical Electrical Schematic - Model HVEA............................................................................14
Figure 1d. Typical Electrical Schematic - Model HVEA ............................................................................15
Figure 1e. Typical Electrical Schematic - Model HVESA (Alternate Construction).................................16
Figure 1f. Typical Electrical Schematic - Model HVESA (Alternate Construction)..................................17
Figure 1g. Typical Electrical Schematic - Model AVHSA (Alternate Construction) ..................................18
Figure 2. Dry Bulb sensor..........................................................................................................................20
Figure 3. Enthalpy Sensor Temperature Control Points ............................................................................21
Figure 4. Electrical Controls, HVESA Alternate Construction .................................................................21
Figure 5. Economizer Control Board ........................................................................................................22
Figure 6. Back Panel Conguration for AVPA/AVHA12 Air Conditioners ..............................................27
Figure 7a. Fresh Air Hood Damper, Models 24-72.....................................................................................29
Figure 7b. Fresh Air Hood Damper, Models AVPA/AVHA12 ....................................................................29
Figure 8a. Wall Mounting Detail.................................................................................................................30
Figure 8b. Wall Mounting Detail.................................................................................................................30
Figure 9a. Humidistat Wiring Details..........................................................................................................34
Figure 9b. Thermostat Connection Diagram ...............................................................................................34
Figure 9c. CommStat™ Touch HVAC Controller Wiring Detail................................................................35
Figure 9d. CommStat™ 3 HVAC Controller Wiring Detail........................................................................35
Tables
Table 1 CFM @ External Static Pressure .................................................................................................6
Table 2 Return Air Filter Sizes .................................................................................................................6
Table 3 Shipping Weights .........................................................................................................................6
Table 4 Minimum Clearances.................................................................................................................24
Table 5 Voltage Limitations....................................................................................................................25
Table 6 Maximum Static Pressure ..........................................................................................................28

Marvair ComPac Installation & Operation Manual
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Chapter 1 Description & Specications
1.1 General Description
The Marvair ComPac® is a series of vertical wall-mounted air conditioning systems that provide heating,
cooling, and ventilation for electronic equipment shelters, process control centers, and other applications
with high internal heat gains. The series includes multiple sizes and nominal cooling capacities from
11,000 to 72,000 BTUH. Resistance heating elements are available in various wattages.
The AVPA models are available with nominal cooling capacities of 12,000 to 72,000 BTUH’s and
Energy Efciency Ratios (EER’s) of 9.0 to 10.0. The AVHA models are available with nominal cooling
capacities of 12,000 to 60,000 BTUH’s and EER’s of 10.0. HVEA modes are available with cooling
capacities of 24,000 to 60,000 BTUH and EER’s of 10.50 to 11.75. HVESA models are identical to
the HVEA models, but have a 2-stage compressor. The ComPac Product Data Sheets have detailed
information on the capacities and efciencies for each model.
See Appendix A for instructions on eld installation of electric heat.
ComPac air conditioners feature an exclusive electronic control board. The control board consolidates
several of the electrical components and improves the air conditioner’s reliability. The control board
replaces the blower relay, the lockout relay, the compressor time delay and the timed low pressure
bypass. In addition, the control board has LED’s to indicate operating status and fault conditions to
assist the service technician. A complete description of functions of the control board is in Section 1.6.
ComPac models are designed for easy installation and service. Major components are accessible for
service beneath external panels.
All units have internal disconnects (optional on 380V and 575V). Follow local codes for external
disconnect requirements.
ComPac units have a 0-15% manual outside air damper as standard equipment. Marvair ComPac models
are available with an optional factory installed economizer for 100% free cooling with outside air.
1.2 Model Identication
The model identication number is found on the data sticker. Rating plate located on side panel.
Brand Designation
Unused = Marvair
ComPac
EUB = Eubank
WalPac Cabinet Color
100 = Beige
200 = Gray
400 = White
500 = Stainless Steel
(Exterior Only)
SS-500 = Stainless Steel
700 = Aluminum
Stucco
A5 = Built in
compliance with
UL 1995, 4th edition
AVP = Standard Efficiency
AVH
= High Efficiency1
HVE = 2-Stage Compressor2
Nominal Cooling
12 = 11,000 BTUH
20 = 20,000 BTUH
24 = 24,000 BTUH
30 = 30,000 BTUH
36 = 36,000 BTUH
42 = 42,000 BTUH
48/49 = 48,000 BTUH
60 = 60,000 BTUH
72 = 72,000 BTUH
System Type
Air Conditioner
Power Supply
A = 208/230V,1ø,60Hz
C = 208/230V,3ø,60Hz
D = 460V,3ø,60Hz (3 wire)
Z = 575V,3ø,60Hz
Configuration
N = Non-Economizer
C = Economizer-Equipped
Electric Heat – kW
000 = No Heat
022 = 2.2 kW
036 = 3.6 kW
040 = 4 kW
050 = 5 kW
060 = 6 kW
Special Option Code
D = Desert Duty
E = Extreme Duty
F = Reverse Air Flow3
G = Hot Gas Reheat
O = Opposite side
compressor
R = Electric Reheat
U = Scroll Compressor
X = Hot Gas Bypass
2-Stage
Compressor
••• S A •• AC • ••• • • A5 ••• •••
Refrigerant
A = R410A 080 = 8 kW
090 = 9 kW
100 = 10 kW
120 = 12 kW
150 = 15 kW
1AVH models utilize a 1-Stage compressor, except the AVHSA72, which has a 2-Stage compressor as standard.
2All HVES models feature a 2-Stage compressor.
3The standard conguration is with the supply (conditioned) air at the top of the unit and the return air below it. In the reverse air ow conguration, the return is at the
top and the supply air below it.
1.3 Serial Number Date Code
A = January E = May J = September D = 2014 H = 2018
B = February F = June K = October E = 2015 I = 2019
C = March G = July L = November F = 2016 J = 2020
D = April H = August M = December G = 2017 K = 2021