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Installation & Operation Manual
9-11 EER Vertical Wall-Mount Heat Pumps
AVPA 24-30-36-42-48-60
HVPA 24-30-36-42-49-60
HVPSA 24-30-36-42-49-60
(Includes units with the GreenWheel
the GreenCube
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.
A Division of the AIRXCEL
P.O. Box 400 • Cordele, Georgia 31010 • 156 Seedling Drive • Cordele, Georgia 31015
E-mail: marvairsales@airxcel.com • Internet: www.Marvair.com
The most current version of this manual can be found at www.Marvair.com.
MODELS:
®
ERV and Hot Gas Reheat)
®
IMPORTANT
Manufactured By:
(229) 273-3636 • Fax (229) 273-5154
Marvair Classic AVPA/HVPA/HVPSA Heat Pump I&O Manual 11/2017 Rev. 7
Heat Pump Product Manual
Vertical Wall-Mount Heat Pumps
with Front Control Box Panel
ERV,
Commercial Group
®
Part #81025
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Table of Contents
Troubleshooting
Related Manuals for Airxcel Marvair HVP Series
Summary of Contents for Airxcel Marvair HVP Series
- 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: A 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. Used to point out helpful suggestions that will result in improved installation, reliability IMPORTANT or operation. SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE. © 11/2017 Airxcel Commercial Group Marvair Classic AVPA/HVPA/HVPSA Heat Pump I&O Manual 11/2017 Rev. 7...
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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 1B Cfm @ External Static Pressure - Hvpa & Hvpsa
Chapter 6 - Periodic Maintenance Requirements 6.1 Scheduled Maintenance ......................... 42 Chapter 7 - Warranty Information 7.1 Standard Product Warranty ........................43 Exploded Views & Parts Lists ........................44 Appendix A - Installation Instructions of Field Installed Electric Heat ............44 igures Figure 1 PC Control Board ........................ -
Page 5: General Description
Instructions for the HVP models with the GreenWheel® ERV and the GreenPac HGR are included in this manual. All Airxcel Commercial Group heat pumps are tested and certified for efficiency and capacity in accordance with the ANSI/AHRI (Air-Conditioning, Heating and Refrigeration Institute) Standard 390-2003 (Single Package Vertical Units). -
Page 6: Serial Number Date Code
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... -
Page 7: General Operation
1.5 General Operation Refrigerant Cycle Classic heat pumps use R-410A refrigerant in a conventional vapor-compression refrigeration cycle to transfer heat. In the cooling mode, a double blower assembly blows indoor air across the evaporator (indoor coil). Liquid refrigerant passing through the evaporator is boiled into gas by heat removed from the air. The warmed refrigerant gas enters the compressor where its temperature and pressure are increased. - Page 8 How It Works During the summer, cool dry air from the classroom is exhausted through the GreenWheel ERV to the ® outside. As the air passes through the rotating wheel, the desiccant becomes cooler and drier. Simultaneously, hot humid air is being pulled across the rotating wheel. The cool, dry desiccant absorbs moisture and heat from the incoming air.
- Page 9 Economizer Operation - Cooling Cycle (Economizer-equipped modes only) The economizer is a regulated damper system with controls. The damper regulates the circulation of outside air into the enclosure (when the outdoor air conditions are suitable) to reduce the need for me- chanical cooling, save energy, and extend compressor life.
- Page 10 Functions Lockout Protection If either of the fault conditions (LPS or HPS) occurs twice within one hour, the control board will enter into and indicate the lockout mode. In the lockout mode, the compressor is turned off. If there is a call for indoor air flow “G”, the blower remains energized, the alarm output is energized and the red LED will blink to indicate which fault has occurred.
- Page 11 to open. When the “G” signal is not present, the control will energize the Damper Relay Closed terminal to close the damper. When “No” is selected, this feature is disabled. The factory setting for the damper relay option is “No”. Defrost Mode The board has an integral defrost cycle that will be initiated by the Defrost Sensor (DS).
- Page 12 the compressor off, register the first HPS fault, and initiate the 3 minute anti-short cycle timer. If two HPS faults occur within a one hour period, the control will enter a HPS lockout condition and energize the alarm contacts. The RED status LED will blink once to indicate this condition. The lockout condition will only be reset by manually cycling power to the control to prevent destructive short cycling.
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Page 13: Options
O The “O” terminal is the reversing valve input from the thermostat. When there is a 24 VAC signal present at the “O” terminal, the control will energize the reversing valve through the “RV” terminals. The control will also energize the “RV” terminals in heat mode during a defrost cycle. G The “G”... -
Page 14: Economizer
Hard Start Kit Used on single phase equipment to give the compressor higher starting torque under low voltage conditions. Field installed only. (Not generally recommended for use on scroll compressor.) Adjustable Outdoor Thermostat Will not allow electric resistance heat to be energized unless the outdoor temperature is below the desired set point. -
Page 15: Figure 2 Enthalpy Sensor Temperature Control Points
mixed air sensors. The controller is designed to maintain the supply air temperature between 50 to 56 by mixing warm indoor air with cooler outdoor air. On a call for cooling from the wall-mounted thermostat, if outdoor conditions are suitable, the sensor will open the damper and admit outside air (i.e., economizer cooling). -
Page 16: Chapter 2 - Installation
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 Marvair unit. -
Page 17: Table 5 Voltage Limitations
5. Airflow Requirements: Note the minimum CFM requirements (section 2.4). Keep duct lengths as short as possible. Do not obstruct airflow through the unit. Applications using duct work should be designed and installed in accordance with all applicable safety codes and standards. Marvair strongly recommends referring to the current edition of the National ®... -
Page 18: Installation Materials
2.3 Installation Materials Installation Kits Classic Heat Pumps have built-in mounting flanges that function as side brackets. All models require and are shipped with a bottom mounting bracket. On units with the "N" ventilation option, there is a fresh air hood factory installed behind the lower front panel. -
Page 19: Porting And Duct Work
Additional Items Needed: Additional hardware and miscellaneous supplies (not furnished by Marvair ) are needed for installation. ® For example, the list below contains approximate quantities of items typically needed for mounting a unit on a wood frame wall structure with standard full length mounting bracket or flanges. Concrete or fiberglass structures have different requirements. -
Page 20: Fresh Air Hood Adjustment
Minimum Airflow Requirements WARNING The duct system must be engineered to assure sufficient air flow through the Heat Pump, even under adverse conditions such as dirty filters, etc. Proper engineering will insure longevity and maximum performance from the Heat Pump unit. Ducting Extensions should be cut flush with the inside wall for applications without duct work. -
Page 21: Bracket Installation
2.6 Bottom Bracket Installation 1. Remove and discard the 4 x 4 shipping boards attached to the base of the unit. 2. All heat pump models have built-in mounting flanges. See Figure 6. 3. Refer to Figure 6. Attach the bottom support bracket to the wall using appropriate 3/8" diameter hardware. -
Page 22: Electrical Connections
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. 9. Check the fit of each sleeve to its mating flange for possible air leaks. Apply silicone sealer to close any gaps. - Page 23 3. Scroll compressors, like several other types of compressors, will only compress in one rotational direction. The direction of rotation is not an issue with single-phase compressors since they will always start and run in the proper direction. However, three phase compressors will rotate in either direction depending upon phasing of power.
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Page 24: Figure 5A Humidity Control Wiring Detail
Thermostat Field Supplied Seven (7) Conductor, Color Coded 18 Gauge Thermostat Cable Humidity Controller Figure 5a - Humidity Control Wiring Detail - Heat Pumps Figure 5b - Thermostat Connection Diagram Marvair Classic AVPA/HVPA/HVPSA Heat Pump I&O Manual 11/2017 Rev. 7... -
Page 25: Chapter 3 - Start-Up
Start-Up Important: If your heat pump unit has a crankcase heater be sure that the crankcase heater has been energized for at least 24 hours prior to start-up of the unit. Double check all electrical connections before applying power. Various thermostats can be used to control the heat pump. The thermostat may have a fan switch with an Automatic and On positions, a system switch with Heat, Cool, and Off positions, and an emergency heat position with lights. -
Page 26: Check-Out Of Heating Cycle
sensors must be "tricked". When outdoor ambient conditions are higher than the control setting, a component aerosol cooler may be sprayed directly into the enthalpy sensor to simulate low enthalpy conditions, causing the economizer damper to open. Alternately, when outdoor conditions are lower than the set point, a source of heat such as a hair dryer can be directed on the air temperature sensor to simulate warmer conditions, which will bring on mechanical cooling and start the compressor. -
Page 27: Figure 6 Temperature Sensor Wires - Modulating Hgr Valve
(temperature). Airxcel Commercial Group recommends 70ºF and no lower than 68ºF and no higher than 78ºF. Allow the refrigerant system to stabilize for at least five minutes and adjust the temperature as desired. -
Page 28: Ventilation System Set Up
3.4 Ventilation System Set-Up: Manual Fresh Air System (Configuration N). This is the standard ventilation system in the Classic heat pumps. Fresh air ventilation by means of a damper can provide up to 15% of rated air flow of outside air. The damper has four positions corresponding to 0, 5, 10 and 15% of rated air flow of outside air. -
Page 29: Figure 9 Damper Air Path
Figure 9 - Damper Air Path b. "A" is the quantity of outside air expressed as a percentage of "C". For example, if the supply air is 1,220 CFM and 300 CFM of outside air is required, "A" is 25% (300 CFM/1,220 CFM). Measure the temperature of the outside air. -
Page 30: Chapter 4 - Troubleshooting
b. For units with the optional variable fan speed controller for the GreenWheel ERV exhaust blower, first ® measure the air being introduced into the classroom using best industry standards and practices. Adjust the speed of the intake air GreenWheel ERV blower until the required outside air is being brought into the classroom. -
Page 31: Failure Symptoms Guide
would be very grateful if you would bring it to the attention of our service department for incorporation in future revisions. As always, please exercise caution and good judgement when servicing your Heat Pump. Use only safe and proven service techniques. Use refrigeration goggles when servicing the refrigeration circuit. The refrigerant circuit has hot surfaces, and the electrical voltages inside of the unit may be hazardous or lethal. -
Page 32: Compressor Troubleshooting
4.3 Compressor Troubleshooting Obtain the heat pump's model number and serial number, the compressor's model number and contact Airxcel Commercial Group for compressor specifications. It is important to rule out other component failures before condemning the compressor. The following electrical tests will aid diagnosis on single phase "HPA" units: 1. -
Page 33: Electric Heat Control
2. Running Amperage: Connect a clip-on type ammeter to the (common) lead to the compressor. Turn on the supply voltage and energize the unit. The compressor will initially draw high amperage; it should soon drop to the RLA value or less. If the amperage stays high, check the motor winding resistances. -
Page 34: Chapter 5 - Electrical Schematics
heater contactor(s) which powers all the heating elements. This single function thermal cut-out switch operates totally independent of the dual thermal cut-out switch described above. If the single function switch senses an overheat situation, it opens the control circuit and turns off all of the installed heating elements via the heater contactor(s). -
Page 35: Figure 11A Typical 1Ø Electrical Schematic Diagram
Figure 11a - Typical 1ø Electrical Schematic Diagram Heat Pump (Models AVPA) with Manual Outside Air Damper Marvair Classic AVPA/HVPA/HVPSA Heat Pump I&O Manual 11/2017 Rev. 7... -
Page 36: Figure 11B Typical 208/230V. 3Ø Electrical Schematic Diagram
Figure 11b - Typical 208/230v. 3ø Electrical Schematic Diagram Heat Pump (Models AVPA) Marvair Classic AVPA/HVPA/HVPSA Heat Pump I&O Manual 11/2017 Rev. 7... -
Page 37: Figure 11C Typical 460V. 3Ø Electrical Schematic Diagram
Figure 11c, Typical 460v. 3ø Electrical Schematic Diagram Heat Pumps, Models AVPA, with the PC Control Board Marvair Classic AVPA/HVPA/HVPSA Heat Pump I&O Manual 11/2017 Rev. 7... -
Page 38: Figure 11D Typical Electrical Schematic Diagram
Figure 11d - Typical Electrical Schematic Diagram Heat Pump (Models HVPA) with Manual Outside Air Damper Marvair Classic AVPA/HVPA/HVPSA Heat Pump I&O Manual 11/2017 Rev. 7... -
Page 39: Heat Pump (Models Hvp) With Economizer
Figure 11e - Typical Electrical Schematic Diagram Heat Pump (Models HVPA) with Economizer Marvair Classic AVPA/HVPA/HVPSA Heat Pump I&O Manual 11/2017 Rev. 7... -
Page 40: Scheduled Maintenance
Maintenance 6.1 Scheduled Maintenance Airxcel Commercial Group strongly recommends that the heat pump be serviced a minimum of twice a year – once prior to the heating season and once prior to the cooling season. At this time the filters, evaporator coil, condenser coil, the cabinet, and condensate drains should be serviced as described below. - Page 41 7.1 Airxcel Commercial Group Limited Product Warranty Airxcel Commercial Group (ACG) warrants its products to be free from defects in materials and workmanship under normal use to the original purchaser when installed within the contiguous United States, the District of Columbia, and Canada for the period of time in the table below.
- Page 42 EXPLODED VIEWS AND PARTS LISTS Current parts lists and exploded views of the unit can be found on our web site at www.Marvair.com. Click on the Service and Parts in the menu on the left hand side of the Home page. From the drop down menu, select Exploded Views.
- Page 43 Ductwork must be firmly attached, secured and sealed to prevent air leakage. Do not use duct liner on inside of supply duct within 4 feet (122 cm) of the unit. Galvanized metal duct extensions should be used to simplify connections to duct work and grilles. Use fabric boots to prevent the transmission of vibration through the duct system.
- Page 44 Marvair Classic AVPA/HVPA/HVPSA Heat Pump I&O Manual 11/2017 Rev. 7...
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