MITS AIR MOB30-12HFN1-MSOW Installation & Service Manual
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MITS AIR MOB30-12HFN1-MSOW Installation & Service Manual

Inverter compressor heat pump
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TM
MITS AIR
Inverter Compressor Heat Pump
Installation / Service Manual
Heat Pump Models with Interface (MA24VA2)
to Connect to Existing AHU, Fancoil, or Furnace
MOB30-12HFN1-MSOW | 1 Ton
MOB31-24HFN1-MTOW | 2 Ton
MOD30-30HFN1-MROW | 2.5 Ton
MOD30U-36HFN1-MX | 3 Ton
MOE30U-48HFN1-MX | 4 Ton
)

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Summary of Contents for MITS AIR MOB30-12HFN1-MSOW

  • Page 1 Inverter Compressor Heat Pump Installation / Service Manual Heat Pump Models with Interface (MA24VA2) to Connect to Existing AHU, Fancoil, or Furnace MOB30-12HFN1-MSOW | 1 Ton MOB31-24HFN1-MTOW | 2 Ton MOD30-30HFN1-MROW | 2.5 Ton MOD30U-36HFN1-MX | 3 Ton MOE30U-48HFN1-MX | 4 Ton...

  • Page 2: Table Of Contents

    Table of Contents Important ......................... 2 Warning ........................... 2 Important Installation Considerations ................3-4 Refrigerant Gases ......................4 Electrical Work Warnings ....................5 Outdoor Unit Installation ....................6 Extreme Weather Conditions ................7 Anchoring ......................7 Bracketing ......................8 Unit Dimensions & Clearances ................8-9 Wiring .........................

  • Page 3: Important

    Important: Legislation for Compliance within Canada This manual is intended for use by personnel qualified by Federal, Provincial, and Municipal licensing in Canada and skill recognitions as required in the jurisdiction in which the equipment is being installed. Appropriate permits must be taken out as required in that jurisdiction in which the equipment is being installed and reporting of installation as required by law are the responsibility of the installer or contractor as obligated by law.

  • Page 4: Important Installation Considerations

    Important Installation Considerations 1. The metering device must be removed from the indoor coil. 2. The liquid line and the gas line from the outdoor unit to the indoor coil must be insulated. 3. The thermostat must be used or configured as a 2 stage heat cool thermostat and the furnace type is “Electric Furnace”...

  • Page 5: Refrigerant Gases

    CAUTION Do not install the unit close to an electrical or gas meter as regulated in the jurisdiction where the equipment is being installed. Do not install the unit in a location that may be exposed to combustible gas leaks. If combustible gas accumulates around the unit, it may cause fire.

  • Page 6: Electrical Work Warnings

    BEFORE PERFORMING ELECTRICAL WORK, READ BELOW: 1. All wiring must comply with local and national electrical codes, and must be installed by a licensed electrician. 2. All electrical connections must be made according to the Electrical Connection Diagram located on the panels of the interface and outdoor units. 3.

  • Page 7: Outdoor Unit Installation

    Outdoor Unit Installation Step 1: Select installation location before installing the outdoor unit. The following are standards that will assist with choosing an appropriate location for the unit. Proper installation locations must meet the following standards:  Meets all spatial requirements shown in Installation Space Requirements (refer to Fig.

  • Page 8: Extreme Weather Conditions

    Special Considerations for Extreme Weather Conditions If the unit is exposed to prevailing winds: Install the unit so that air outlet is at a 90° angle to the direction of the wind. If needed, obtain wind baffles from your distributor to protect the unit from extremely heavy winds.

  • Page 9: Bracketing

    5. Check that the mounting brackets are level. 6. Carefully lift unit and place its mounting feet on brackets. 7. Bolt the unit firmly to the brackets. Unit Dimensions Dimensions Model Unit MOB30-12HFN1-MSOW Inches 37.24 16.14 31.89 40.6 26.5 15.9...
  • Page 10 Minimum Clearance For Outdoor Unit MULTIPLE UNIT CLEARANCES FOR OUTDOOR UNITS Page 9 of 29...

  • Page 11: Wiring

    BEFORE PERFORMING ANY ELECTRICAL OR WIRING WORK, TURN OFF THE MAIN POWER TO THE SYSTEM. ALL WIRING MUST BE PERFORMED STRICTLY IN ACCORDANCE WITH THE LOCAL CODE WITHIN CANADA. 1. Prepare the cable for connection: a. Using wire strippers, strip the rubber jacket from both ends of cable to reveal about 40mm (1.57 in) of the wires inside.

  • Page 12: Refrigerant Tubing Connection

    Refrigerant Tubing Connection Note on Pipe Length: The length of refrigerant piping will affect the performance and energy efficiency of the unit. Nominal efficiency is tested on units with a pipe length in North America of 7.5 m (25’). A minimum pipe run of 3 meters (10 ft) is required to minimize vibration and excessive noise.
  • Page 13 Step 2: Remove Burrs Burrs can affect the air-tight seal of refrigerant piping connection. They must be completely removed. 1. Hold the pipe at a downward angle to prevent burrs from falling into the tubing. 2. Using a reamer or deburring tool, remove all burrs from the cut section of the tubing.

  • Page 14: Instructions For Connecting Flares

    CAUTION – DO NOT USE EXCESSIVE TORQUE Excessive force can break the nut or damage the refrigerant tubing. Torque requirements must not exceed values as shown in the table below. Step 4: Connect Tubes When connecting refrigerant tubing, be careful not to use excessive torque or to deform the tubing in any way.

  • Page 15: Pressure Testing & Evacuation

    Pressure Testing and Evacuation This procedure is intended for professionals with appropriate certification and licensing in the jurisdiction that the equipment is installed in. This procedure requires the use of high-pressure gasses that if incorrectly used can cause injury and death. Ensure the maximum test pressure of your indoor coil.
  • Page 16 4. Connect your manifold center hose to the regulator and your high-pressure hose to the machine. You will require a 1/4” to 5/16” hose adaptor to do this. 5. Open the main high pressure valve of the tank and ensure that the regulator is not leaking.

  • Page 17: Connecting Piping

    Instructions for Connecting Piping to Outdoor Unit USE WRENCH TO GRIP MAIN BODY OF VALVE Excessive torque can damage the valve, flare nuts, tubing, and snap off other parts of the valve. 1. Unscrew the cover from the packed valve on the side of the outdoor unit (see Fig.

  • Page 18: Evacuation And Opening The System

    Evacuation and Opening the System Preparations and Precautions  Air and foreign matter in the refrigerant circuit can cause abnormal rise in pressure, which can damage the air conditioner, reduce its efficiency, and cause injury.  Use a vacuum pump and manifold gauge to evacuate the refrigerant circuit, removing any condensable gas and moisture from the system.

  • Page 19: Installing The Interface

    Opening the System 1. If the one-way length of refrigerant liquid line is greater than twenty-five feet (25’), consult the charge sheet in the rear of the manual and weigh in the charge adjustment. Refer to page 26. 2. Remove the cap of the gas line stop valve. Use a metric Allen key to open the valve and rotate the valve stem to its maximum opening.

  • Page 20: Test Run

    Test Run and Start-Up Report Before Test Run Only perform test run after the following steps have been completed:  Electrical Safety Checks – Confirm that the unit’s electrical system is safe and operating properly.  Gas Leak Checks – Check all flare nut connections and confirm that the system is not leaking.

  • Page 21: Start-Up Report Form

    Address 1 Address 2 City Province Postal Code Telephone Number Email Outdoor Unit Indoor Coil Manufacturer Mits Air Model Serial No. Testing Check List Ambient °F Piston / TXV Removed Return Air °F Liquid Line Insulated Supply Air °F Gas Line Insulated Return Air Temp at RA Sensor °F...

  • Page 22: Wiring Diagrams

    Wiring Diagrams MITS AIR 1.0, 2.0, & 2.5 TON PHYSICAL WIRING DIAGRAM Models: Heat Pumps 1 Ton  MOB30-12HFN1-MSOW 2 Ton  MOB31-24HFN1-MTOW 2.5 Ton  MOD30-30HFN1-MROW Page 21 of 29...
  • Page 23 MITS AIR 3.0 & 4.0 TON PHYSICAL WIRING DIAGRAM Models: Heat Pumps 3 Ton  MOD30U-36HFNI-MX 4 Ton  MOE30U-48HFNI-MX Page 22 of 29...
  • Page 24 SIMPLIFIED POWER WIRING FOR 1.0, 2.0, & 2.5 TON OUTDOOR UNITS Models: Heat Pumps 1 Ton  MOB30-12HFN1-MSOW 2 Ton  MOB31-24HFN1-MTOW 2.5 Ton  MOD30-30HFN1-MROW OUTDOOR UNIT INTERFACE PANEL Page 23 of 29 SW 2020 V1...
  • Page 25 SIMPLIFIED POWER WIRING FOR 3 & 4 TON OUTDOOR UNITS Models: Heat Pumps 3 Ton  MOD30U-36HFNI-MX 4 Ton  MOE30U-48HFNI-MX OUTDOOR UNIT INTERFACE PANEL Page 24 of 29 SW 2020 V1...
  • Page 26 SIMPLIFIED LOW VOLTAGE WIRING Models: Heat Pumps FOR HEAT PUMP 1 Ton  MOB30-12HFN1-MSOW 2 Ton  MOB31-24HFN1-MTOW 2.5 Ton  MOD30-30HFN1-MROW 3 Ton  MOD30U-36HFN1-MX 4 Ton  MOE30U-48HFN1-MX Page 25 of 29...

  • Page 27: Additional Refrigerant Charge Chart

    Additional Refrigerant Charge Chart Page 26 of 29...

  • Page 28: Unit Data

    Unit Data The Mitsair Inverter Heat Pump can operate with any AHU, fan coil, or furnace (*some conditions apply). *Defrost Pan Heater included ♦ Outdoor Unit includes Interface module MA24VA2 MOB31-24HFN1-MTOW model is Energy Star rated Page 27 of 29...

  • Page 29: Notes

    Notes ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________...

  • Page 30: Limited Warranty

    MITS AIR Inverter Compressor Side Discharge Heat Pump 1. MITS AIRCONDITIONING INC. (“MITS”) warrants to the original end user of this MITS AIR Inverter Compressor Side Discharge Heat Pump Unit (the “Equipment”) for the periods described below that the Equipment will be free of manufacturing defects. If the Equipment fails to operate under normal use due to a manufacturing defect, the Equipment has 5 year parts and 5 year compressor warranty effective from the date of installation.

This manual is also suitable for:

Mob31-24hfn1-mtowMod30-30hfn1-mrowMod30u-36hfn1-mxMoe30u-48hfn1-mx

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