Table of Contents
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Chapter 1
Description ................................. 5
Chapter 2
Installation ............................... 11
Chapter 3
Start-Up ................................... 20
Chapter 4
Troubleshooting ....................... 20
Chapter 5
Maintenance ............................. 24
Chapter 6
Warranty .................................. 25
Chapter 7
Start-Up Checklist .................... 26
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 Identification
to determine which features and options this unit is equipped with.
INSTALLER: Affix the instructions on the inside of the building adjacent to the thermostat.
END USER: Retain this manual for future reference.
Marvair Division of the AIRXCEL
P.O. Box 400 • Cordele, Georgia 31010 • 156 Seedling Drive • Cordele, Georgia 31015
The most current version of this manual can be found at www.Marvair.com.
Models: ComPac AVHDA90
IMPORTANT
Manufactured By:
(229) 273-3636 • Fax (229) 273-5154
www.Marvair.com | www.EubankWallmount.com
Installation & Operation Manual
10EER 7.5 Ton Vertical Wall Mount
Air Conditioners
Commercial Group
®
Marvair ComPac AVHDA I&O Manual 03/2019 Rev.3
Part #03268
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Table of Contents
Troubleshooting
Related Manuals for Airxcel Marvair ComPac II AVHDA90
Summary of Contents for Airxcel Marvair ComPac II AVHDA90
- Page 1 INSTALLER: Affix the instructions on the inside of the building adjacent to the thermostat. END USER: Retain this manual for future reference. Manufactured By: Marvair Division of the AIRXCEL Commercial Group ® P.O. Box 400 • Cordele, Georgia 31010 • 156 Seedling Drive • Cordele, Georgia 31015 (229) 273-3636 •...
- Page 2 Failure to comply could result in minor personal injury and/or property damage. CAUTION Used to point out helpful info that will result in improved installation, reliability or operation. IMPORTANT SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE. © 03/2019 Marvair Div. Airxcel , Inc. ® ™ Marvair ComPac AVHDA I&O Manual 03/2019 Rev.3...
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Page 3: Table Of Contents
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. •... - Page 4 Table of Contents Chapter 5 Maintenance Scheduled Maintenance .........................24 Chapter 6 Warranty Limited Product Warranty ........................25 Chapter 7 Start-Up Check List Start-Up Check List ..........................26 Illustrations Figure 1. Typical Electrical Schematics for Units with Two Compressors ........... 10 Figure 2. Top Flange and Lifting Bracket Installation ................
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Page 5: General Description
Chapter 1 Description & Specifications General Description The Marvair ComPac is a series of vertical wall-mounted air conditioning systems that provide heating, cooling, and ventilation for telecommunication shelters, and other applications with high internal heat gains. The series is available in nominal cooling capacities of 90,000 BTUH. A factory installed economizer, resistance heating elements and reverse flow configurations are available. -
Page 6: Capacities, Weights And Filter Sizes
Capacities, Weights and Filter Sizes Complete electrical and performance specifications and dimensional drawings are in the Product Data Sheet. Note: Follow local codes and standards when designing duct runs to deliver the required airflow. Minimize noise and excessive pressure drops caused by duct aspect ratio changes, bends, dampers and outlet grilles in duct runs. -
Page 7: General Operation
Shipping Dimensions Unit Weight Shipping Weight MODEL Height Width Depth Inches Inches Inches AVHDA90 1,160 527.3 1,285 584.1 2,489 1,422 1,219 Table 8. Shipping Weights & Dimensions General Operation Hot Gas By-Pass Normally used in specialty applications (i.e Magnetic Resonance Imaging (MRI) buildings) to prevent magnetic voltage disturbance caused by cycling. - Page 8 Delay on Break If the compressor is de-energized due to a loss of a cooling “Y” call or the first fault, the unit re-start will be delayed 3 minutes from the time the contactor is de-energized. (Note: There is no delay on break if the lockout condition is reset.) Delay on Make On initial power up only, the unit will wait 0.03 to 10 minutes from the cooling “Y”...
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Page 9: Optional Controls And Packages
1.7 Optional Controls & Packages Protective Coating Packages Two corrosion protection packages are offered- one for the condenser section (the Coastal Environmental package) and the other for the entire unit (the Coat-All Package). The condenser protection package includes: • Corrosion resistant fasteners •... -
Page 10: Figure 1. Typical Electrical Schematics For Units With Two Compressors
Figure 1. Typical Electrical Schematic for Units with Two Compressors Marvair ComPac AVHDA I&O Manual 03/2019 Rev.3... -
Page 11: Chapter 2 Installation
Chapter 2 Installation WARNING Failure to observe and follow Warnings and Cautions and these Instructions could result in death, bodily injury or property damage. Read this manual and follow its instructions and adhere to all Cautions and Warnings in the manual and on the unit. Equipment Inspection Concealed Damage Inspect all cartons and packages upon receipt for damage in transit Remove cartons and check for... -
Page 12: Installation Materials
standards. Marvair strongly recommends referring to the current edition of the National Fire Pro- tection Association Standards 90A and 90B before designing and installing duct work. The duct system must be engineered to insure sufficient air flow through the unit to prevent over-heating of the heater element. - Page 13 Kit Components: Accessories: The package may include other factory-supplied items (optional): Description K/10439 CommStat Touch Controller, Solid State Lead/Lag Controller w/Touch Screen S/07846 CommStat 4 Controllers, Solid State Lead/Lag Controller 50123 Digital thermostat. 1 stage heat, 1 stage cool. 7 day programmable. Fan switch: Auto & On.
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Page 14: Porting And Duct Work
Porting and Duct Work General Information Note: The following instructions are for general guidance only. Due to the wide variety of installation possibilities, specific instructions will not be given. When in doubt, follow standard and accepted installation practices, or contact Marvair for additional assistance. -
Page 15: Installing The Lifting Brackets
Figure 2. Top Flange and Lifting Bracket Installation (Typical) Installing the Lifting Brackets The units have lifting brackets that can be installed on the top of the side panels. These brackets allow the unit to be picked up thru lifting eyes in the brackets. The lifting brackets are shipped attached to the back panel of the AVHDA unit. -
Page 16: Electrical Connections
For units with electric heat, a one inch clearance is required around the duct extensions. The duct extensions must be constructed of galvanized steel with a minimum thickness of .019” as per the NFPA standards 90A & 90B. Figure 3. Air Conditioner Wall Mount Detail Electrical Connections WARNING ELECTRICAL SHOCK HAZARD Failure to follow safety warnings exactly could result in serious injury, death, and/or... - Page 17 the installation of gauges may be objectionable, can be made by monitoring the temperature of the refrigerant lines at the compressor. The temperature should rise on the discharge line while the suction line temperature decreases. Reverse rotation also results in a substantially reduced current draw when compared to tabulated values.
- Page 18 2. Test for proper phasing as follows: A. Power up the units. B. Using an AC volt meter set to the 300 volt scale, measure voltage between terminal L1 on the compressor contactor of unit #1 and terminal L1 on the compressor contactor of unit #2 If voltage is present, units are wired out of phase and must be rewired.
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Page 19: Figure 4A. Thermostat Connection Diagram
Figure 4a. Thermostat Connection Diagram Figure 4b. CommStat 3 Wiring Diagram Marvair ComPac AVHDA I&O Manual 03/2019 Rev.3... -
Page 20: Chapter 3 Start-Up
Chapter 3 Start-Up Check-Out of Cooling Cycle Important: Be sure that the crankcase heater (if used) has been energized for at least 24 hours before starting the unit(s). Double-check all electrical connections before applying power. All air conditioners with scroll compressors running on 3Ø power must be checked for proper rotation during the initial start-up. -
Page 21: Failure Symptoms Guide
A comprehensive understanding of the operation of the air conditioner is a prerequisite to troubleshoot- ing. Please read the Chapter 1 for basic information about the unit. Our air conditioners are thoroughly tested before they are shipped from the factory. Although unlikely, it is possible that a defect may escape undetected, or damage may have occurred during transportation. -
Page 22: Compressor Troubleshooting
PROBLEM/SYMPTOM LIKELY CAUSE(S) CORRECTION C. Unit cycles on high/low pressure 1. Loss or restriction of airflow. 1. Check blower assembly for proper operation. Look limit. for airflow restrictions, e.g.. the air filter. Check blower motor and condenser fan. 2. Restriction in refrigerant circuit. 2. -
Page 23: Control Board Diagnosis
3. Motor Winding Resistances: Using a digital volt-ohm meter (VOM), measure the resistance across the compressor windings as shown below. SINGLE THREE PHASE PHASE > R > R Resistance can be measured as shown above. Any deviation from above values could indicate a defective compressor. -
Page 24: Chapter 5 Maintenance
Chapter 5 Maintenance The middle front panel provides access to the electrical/control box and to the filters. This panel has hinges on the left and right hand side. This panel should ONLY be opened by using the two hinges on the left side OR the two hinges on the right side. -
Page 25: Chapter 6 Warranty
Chapter 6 Warranty Airxcel Commercial Group Limited Product Warranty If any part of your Airxcel Commercial Group Air Conditioner, Heat Pump or Unit Ventilator fails because of a manufacturing defect within the time frame in the table below, the Airxcel Commercial Group will furnish without charge, EXW Cordele, Georgia, the required replacement part. -
Page 26: Start-Up Check List
Chapter 7 Start-Up Check List The middle front panel provides access to the electrical/control box and to the filters. This panel has hinges on the left and right hand side. This panel should ONLY be opened by using the two hinges on the left side OR the two hinges on the right side. - Page 27 Condensate Section Has water been placed in drain pan to confirm proper drainage? ❒Yes ❒No Are correct filters in place? ❒Yes ❒No Refrigerant Piping If leaks are found, report any leaks to Marvair Warranty Service Dept. C. Check Rated Voltage at Terminal Block for Imbalance before starting of Unit. ❒208/230V 1 Phase ❒208/230V 3 Phase ❒460V 3 Phase...
- Page 28 D. Heating Mode Check & Record Readings Circuit 1 Circuit 2 (if applicable) Room Temperature ________ ________ Outside Temperature ________ ________ Evap. Entering Air DB Temp ________ ________ Evap. Entering Air WB Temp ________ ________ Evap. Leaving Air DB Temp ________ ________ Evap.
- Page 29 Circuit 1 Circuit 2 (if applicable) Room Temperature ________ ________ Outside Temperature ________ ________ Suction Pressure ________ ________ Suction Line Temperature ________ ________ Discharge Pressure ________ ________ Discharge Line Temperature ________ ________ Entering Condenser Air ________ ________ Leaving Condenser Air ________ ________ Evap.
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