Marvair 8AA1024H Installation & Operation Manual
  1. Manuals
  2. Brands
  3. Marvair Manuals
  4. Heat Pump
  5. 8AA1024H
  6. Installation & operation manual

Marvair 8AA1024H Installation & Operation Manual

11 eer vertical wall-mount heat pumps
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Installation & Operation Manual
11 EER Vertical Wall-Mount Heat Pumps
8AA1024H-1030H-1036H-1042H-1048H-1060H
8AA2024H-2030H-2036H-2042H-2048H-2060H
(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.
Marvair, An AirX Climate Solutions Brand
P.O. Box 400 • Cordele, Georgia 31010 • 156 Seedling Drive • Cordele, Georgia 31015
E-mail: marvairsales@airxcs.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 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2
Heat Pump Product Manual
Vertical Wall-Mount Heat Pumps
with Front Control Box Panel
ERV,

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 8AA1024H and is the answer not in the manual?

Questions and answers

Related Manuals for Marvair 8AA1024H

Summary of Contents for Marvair 8AA1024H

  • Page 1 P.O. Box 400 • Cordele, Georgia 31010 • 156 Seedling Drive • Cordele, Georgia 31015 (229) 273-3636 • Fax (229) 273-5154 E-mail: marvairsales@airxcs.com • Internet: www.Marvair.com The most current version of this manual can be found at www.Marvair.com. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 2 For information on the efficiency, cooling and heating performance, please refer to the Product Data Sheets. The most current version of all literature can be found on our website at www.Marvair.com. If you are installing the heat pump unit, first read Chapter 1 and scan the entire manual before beginning the installation as described in Chapter 2.

  • Page 3: Table Of Contents

    4.1 Check-Out of Cooling Cycle ........................ 38 4.2 Check-Out of Heating Cycle ......................... 39 4.3 Discharge Air Adjustment for Modulating Hot Gas Reheat (HGR) Valve ........... 39 4.4 Ventilation System Set Up ........................41 Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 4 Air Flow (Cubic Feet per Minute) ..................... 7 Table 2 Ship Weight ..........................7 Table 3 Filter Sizes ..........................7 Table 4 Minimum Clearances ....................... 30 Table 5 Voltage Limitations ........................30 Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 5: Chapter 1 Description & Specifications

    Units). All Marvair heat pumps meet or exceed the efficiency requirements of ANSI/ASHRAE/IESNA 90.1.2016. All heat pump models are listed by ETL and tested to UL standard 1995, 4th Edition. Marvair heat pumps are commercial units and are not intended for use in residential applications.

  • Page 6: Model Identification

    $ = Special Configuration Not Covered by $ = Special Model Nomenclature Note: Not all options are available with all configurations. Contact your Marvair sales representative for configuration details and feature compatibility. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 7: Serial Number Date Code

    927 x 559 x 25 80139 8AA1030H/1036H/1042H & Filter 8AA2036H/2042H Intake Air w/GreenWheel ERV 14 x 14 x 1 356 x 356 x 25 80192 Filter* *Units with the GreenWheel ERV Table 3. Filter Sizes Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 8: General Operation

    1.5 General Operation Refrigerant Cycle Marvair 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.
  • Page 9 Individual blower control allows positive pressurization of the classroom. Field or factory installed. The Marvair GreenWheel® ERV is a total energy (both sensible and latent) wheel that reduces both Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 10 GreenWheel ERV reduces the energy load of the outside air. Exhausting stale, inside air keeps indoor pollutants and harmful gases to a minimum. The Marvair GreenWheel ERV has been tested and certified according to ARI Standard 1060.

  • Page 11: Options

    (TXV), crankcase heater, hard start kit, and an outdoor thermostat and fan cycle switch. The fan cycle control is standard on all Marvair 8AA heat pumps and operates based upon the liquid line pressure. The outside thermostat opens whenever the outside temperature is below 50°F (10°C) and closes when the outside temperature is 50°F (10°C)

  • Page 12: Chapter 2 Electronic Control Board

    Lockout contacts are also provided along with the alarms being transferred via Modbus. This chapter provides the necessary information for installing and operating the Marvair PCB. The diagram below identifies the inputs, outputs and connections for the Marvair PCB. See I/O table.

  • Page 13: Installation And Replacement

    Low Pressure Lockout Compressor Circuit 1 LP-2 Low Pressure Lockout Compressor Circuit 2 HP-1 High Pressure Lockout Compressor Circuit 1 HP-2 High Pressure Lockout Compressor Circuit 2 Low Voltage "Brownout" 16VAC or Less for 10 Minutes Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 14 Available Baud Rates 9.6 = 9600, 19 = 19200 Modbus timeout 21916 Communications Timeout in minutes Test Y, n When set to “Y” all timers are reduced for testing SW version number Displays the current version software Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 15 The selections for the SCKT Set are Y (yes) or N (no). When set to N (no, Default) the electric heat will be allowed to operate with the compressor in heat-pump mode upon a call Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 16 17. Dehum Speed: This is an independent setting for the speed at which the Indoor blower will operate upon a request for HUM (Dehumidification) via Digital Input or Modbus. The default setting for Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 17: Operation

    Operation Power The Marvair PCB requires 24 VAC to operate. When the board is sufficiently powered, the “PWR” status light on the PCB illuminates “Green.” When the power supply voltage is 16vac or less for 10 seconds the control board will de-energize all outputs. This is considered a voltage brownout (low voltage) condition and the display of the control board will show “03”...
  • Page 18 2. Normal Operating Mode describes a mode in which there are no active faults which would interrupt the operation of the system. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 19 Stage 1 Cooling (1 Staged Compressor) CC1 (Partial Capacity) Stage 2 Cooling (2 Fixed Compres-sors) Y1 + Y2 CC1 + CC2 (Full Capacity) Stage 2 Cooling (2 Staged Compres-sors) Y1 + Y2 CC1 + CC2 (Full Capacity) Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 20 “Stage1 Cooling” Y1 + O signal via Digital input or Modbus), energizes the Reversing Valve Output (RV) and Compressor 1 Relay Output (CC1) on the PCB. The controller provides a continuous control signal associated to the Indoor Fan Motor, that is proportional Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 21 Note: Selecting N=No in configuration setting 12 will disable economizer operation. DANGER Sever hazard. The economizer contains moving parts capable of causing serious injury or death. Disconnect power before removing the covering panel. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 22: Enthalpy Sensor And Temperature Control Points

    63°F. This setpoint can be adjusted in 1F increments from 20F to 105F in the control board configuration menu setting 14. Example of the dry bulb sensor is shown below. Note: Selecting N=No in configuration setting 12 will disable economizer operation. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 23: Figure 2 Dry Bulb Sensor

    (no staging). The Heater will remain on until the Heating setpoint is satisfied and the request is dropped. Once the heating setpoint is satisfied, the Indoor motor continues to run based Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 24 Once the Heater output is energized, the Heater comes on at full capacity (no staging). The Heater will remain on until the Heating setpoint is satisfied and the request is dropped. Once Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 25 When the liquid line temperature is below 80F the outdoor fan will shut off. A liquid line temperature above 115F will force the outdoor fan to operate at the maximum speed Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 26 6.2 Low Pressure Lockout / Freeze Protection – A10K Nominal NTC Thermistor is connected to the “LPS 1” and “LPS2” inputs of the control board for circuit 1 and circuit 2 respectively. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 27 Indoor Motor at the “Y2” speed setting on the board or via Modbus and provide a 10vdc signal from the ECO output of the control board to drive the motorized damper fully open. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 28 8.0 Smoke / Fire Shutdown 8.1 System Shutdown Contact Wiring – Add Normally Closed Dry contacts as shown for immediate shutdown of HVAC upon contacts opening. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 29: Chapter 3 Installation

    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 30: Table 4 Minimum Clearances

    Electrical Rating Designations* Nominal Voltage 208/230 208/230 Phase Minimum Voltage Maximum Voltage * Letters refer to model number code designations. Refer to page 5. Table 5 - Voltage Limitations Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 31: Installation Materials

    3.3 Installation Materials Installation Kits Marvair 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 32: 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 33: Fresh Air Hood Adjustment

    (no fresh air). To provide fresh air, remove the two screws on either side of the hood and reposition as desired. Figure 3 - Fresh Air Hood Damper Adjustment Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 34: Bracket Installation

    8. On the inside of the structure, wall sleeves must be installed in the supply and return air openings. The sleeves should be trimmed to fit flush with the inside wall. For units with electric heat, a one Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 35: Electrical Connections

    & L3 for three phase models). CAUTION CAUTION! This system contains components that require phasing for correct rotation. Failure to observe rotation and correct on start-up will cause damage not covered by the Marvair Warranty. ® Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 36 Terminals 8 & 10 on the heat pump with economizer can be connected to a normally closed smoke alarm or fire stat to cause equipment shutdown when the circuit is opened. (Remove factory jumper). CAUTION The internal transformer is not designed to power other external devices. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 37: Figure 5A Humidity Control Wiring Detail

    Figure 5a - Humidity Control Wiring Detail - Heat Pumps Figure 5b - Thermostat Connection Diagram Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 38: Chapter 4 Start Up

    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. The spec sheets have detailed description of the various Marvair ®...

  • Page 39: Check-Out Of Heating Cycle

    1. Place the thermostat system switch to "Auto" or "Heat" and the fan to "Auto". 2. Raise the heating set point temperature to a setting which is higher than the room temperature. The fan and compressor should cycle on after time delay (standard on Marvair heat pumps with economizer) has cycled.

  • Page 40: Figure 6 Temperature Sensor Wires - Modulating Hgr Valve

    (temperature). Marvair 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 41: Ventilation System Set Up

    4.4 Ventilation System Set-Up: Manual Fresh Air System (Configuration N). This is the standard ventilation system in Marvair 8AA 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 42: Figure 9 Damper Air Path

    GreenWheel ERV assembly. Access to the speed controller is through the return air grille. Measure the intake air again and adjust the speed of the blowers. Repeat as necessary to meet the fresh air requirements. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 43 GreenCube ERV assembly. Access to the exhaust air controller is through the return air grille. It is usual practice to pressurize the classroom by exhausting slightly less air than is being brought into the classroom. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 44: Chapter 5 Troubleshooting

    Chapter 5 Troubleshooting 5.1 Overview A comprehensive understanding of the operation of the Marvair Heat Pump is a prerequisite to troubleshooting. Please read the Chapter 1 for basic information about the unit. Marvair Heat Pumps are thoroughly tested before they are shipped from the factory. However, it is possible ®...

  • Page 45: Failure Symptoms Guide

    3. Defective heater contactor. 3. Check relay for proper operation. Replace if defective. 4. Thermostat set too low. 4. Adjust thermostat. 5. Compressor fault. 5. Reset the lock out relay at the thermostat. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 46: Compressor Troubleshooting

    Do not do this test under vacuum. 4. On single phase models, check the capacitor by substitution. 5.4 Electric Heat Controls Figure 10 - Typical Configuration for Single Element Heater Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 47 This switch would typically open if both elements of the dual thermal cut-out switches failed. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 48: Chapter 6 - Electrical Schematics

    The indoor evaporator fan motor is cycled by the blower timed delay relay. See Figure 9. Due to the large number of variations and options available for the Marvair heat pumps, it is not practical to include every possible wiring schematic in this manual. The following schematics are typical. Included in each heat pump is the electrical schematic for that unit.

  • Page 49: Figure 11A Typical 1Ø Electrical Schematic Diagram Heat Pump With Manual Outside Air Damper

    Figure 11a - Typical Electrical Schematic Diagram Heat Pump Models with Manual Outside Air Damper Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 50: Figure 11B Typical 208/230V. 3Ø Electrical Schematic Diagram Heat Pump

    Figure 11b - Typical Electrical Schematic Diagram Heat Pump Models with Economizer Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 51: Scheduled Maintenance

    7.1 Scheduled Maintenance Marvair 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 52: Chapter 8 - Warranty Information

    5 Years Compressor If any part of your Marvair, Inc. unit fails within 90 days of the commencement of the warranty, Marvair, Inc. will furnish without charge, EX Works, Cordele, Georgia, the required replacement part and pay for the labor to replace the part in accordance with the Marvair, Inc. Flat Rate Labor Guidelines.

  • Page 53: Chapter 9 Start-Up Check List

    Chapter 9 Start-Up Check List Start-Up & Commissioning Form Please complete the information on this form and return to Marvair by mail or fax. The mailing address and fax number can be found at the end of the form. A. Equipment Information...
  • Page 54 L1 & L3 = 243 Volts = 717 / 3 = 239 Average Voltage L2 & L3 = 233 Volts 239 - 233 = 6 100 x 6/239 =2.5% Voltage Unbalance Three phase units only check fan & compressor rotation. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 55 Measured Line to Line Volts L1&L2_______V. L1&L3 ________V. L2&L3______V. (L1&L2 + L1&L3 + L2&L3)/3 = Avg. Voltage = _______________ Max. Deviation from avg. voltage = ______________volts Voltage imbalance = (100 x Max. Deviation)/avg. Voltage = ___________% Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 56 Evap. Leaving Air WB Temp ________ ________ Compressor Amps (L1) ________ ________ Compressor Amps (L2) ________ ________ Compressor Amps (L3) ________ ________ Notes: __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

  • Page 57: Appendix A - Installation Instructions Of Field Installed Electric Heat

    The 1" (25.4 mm) clearance must extend on all sides of the supply duct for the first 3 feet (1 meter) from the unit. IMPORTANT: Marvair requires a minimum of 1" (25.4 mm) from the surface of any supply ducts to combustible material for the first 3 feet (1 meter) of the duct.
  • Page 58 15. Place the wiring diagram provided with the heater kit inside the zip lock bag which is affixed to the back side of the control box cover. 16. Replace the control box cover, the bottom front cover and the top front panel. Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...
  • Page 59 Marvair 8AA1024H-1060H & 8AA2024H-2060H I&O Manual 06/2023 Rev.2...

This manual is also suitable for:

8aa1030h8aa1036h8aa1042h8aa1048h8aa1060h8aa2024h ... Show all

Table of Contents