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For 18,000 - 60,000 BTU Systems
NOTE
Read the entire instruction manual before starting the
installation. Images are for illustration purposes only. Actual
models may differ slightly.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Installation Manual
Inverter Heat Pump
Units Covered In This Manual
SYSTEM
VOLTAGE/
BTUH
TONS
1.5
18,000
208/230-1
2.0
24,000
208/230-1
2.5
30,000
208/230-1
3.0
36,000
208/230-1
3.0
36,000
208/230-1
3.5
42,000
208/230-1
4.0
48,000
208/230-1
4.0
48,000
208/230-1
5.0
60,000
208/230-1
OUTDOOR MODEL
PHASE
MO1HE-H18B-2A
MO1HE-H24B-2A
MO1HE-H30B-2A
MO1HE-H36B-2A
MO1SE-H36B-2A
MO1HE-H42B-2A
MO1HE-H48B-2A
MO1SE-H48B-2A
MO1HE-H60B-2A
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Summary of Contents for Midea Evox MO1HE-H18B-2A
- Page 1 Installation Manual Inverter Heat Pump For 18,000 - 60,000 BTU Systems Units Covered In This Manual SYSTEM VOLTAGE/ BTUH OUTDOOR MODEL TONS PHASE 18,000 208/230-1 MO1HE-H18B-2A 24,000 208/230-1 MO1HE-H24B-2A 30,000 208/230-1 MO1HE-H30B-2A 36,000 208/230-1 MO1HE-H36B-2A 36,000 208/230-1 MO1SE-H36B-2A 42,000 208/230-1 MO1HE-H42B-2A NOTE Read the entire instruction manual before starting the...
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Page 2: Table Of Contents
Table of Contents Safety Considerations ..............3 Step 6 - Communication Wiring Connections - Dip Switch Table S-1: Minimum Room Area Requirements ......5 Configuration ................20 Table S-3: Explanation of symbols displayed on the indoor Table 6-1: Communication Wiring Sizes ........20 unit or outdoor unit ............ -
Page 3: Safety Considerations
Safety Considerations capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not WARNING play with the appliance. -
Page 4: Product Installation
and “outdoor unit installation” sections. CAUTION TAKE NOTE OF FUSE SPECIFICATIONS The air conditioner’s circuit board (PCB) is designed with a EQUIPMENT DAMAGE HAZARD fuse to provide overcurrent protection. The specifications Failure to follow this caution may result in of the fuse are printed on the circuit board, for example, equipment damage or improper operation. - Page 5 only be carried out by competent technicians. regulations. 10. Appliance shall be stored in a well-ventilated area where - That mechanical connections shall be accessible for the room size corresponds to the room area as specified maintenance purposes. for operation. - Be careful that foreign matter (oil, water, etc.) does not 11.
- Page 6 mentioned in the form of a table or a single figure to minimize the risk of flammable gas or vapor being without reference to a formula; present while the work is being performed. • after completion of field piping for split systems, 6.
- Page 7 components unless the components are constructed or isolated (using shut-off valves) in a part of the system of materials that are inherently resistant to being remote from the leak. See the following instructions for the corroded or are suitably protected against being so removal of refrigerant.
- Page 8 Before carrying out this procedure, the technician recovery occurs. must be completely familiar with the equipment and The recovery equipment shall be in good working order all its details. It is recommended good practice that with a set of instructions concerning the equipment that all refrigerants are recovered safely.
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Page 9: Potential Ignition Sources
Table S-3: Explanation of symbols displayed on 21. Unventilated areas - An unventilated area where the appliance using the indoor unit or outdoor unit FLAMMABLE REFRIGERANTS is installed shall be so This symbol shows that this constructed that should any refrigerant leak, it will not appliance used a flammable stagnate to create a fire or explosion hazard. -
Page 10: Installation Accessories
Installation Accessories Table A-3: Suction and Liquid Line Flare to Braze Adapter Sizes The system is shipped with the following accessories. Use all Liquid the installation parts and accessories to install the system. Suction Suction Line Improper installation may result in water leakage, electrical Line Flare Line Flare Model Number... -
Page 11: Dimensions
Dimensions Table D-1: Dimensions Unit Sizes Mounting Dimensions System Height (H) Width (W) Depth (D) Size in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) 26-1/2 (673) 35 (890) 13-15/32 (342) 26-1/8 (663) 13-15/16 (354) 26-1/2 (673) 35 (890) 13-15/32 (342) 26-1/8 (663) 13-15/16 (354) -
Page 12: Clearances
Clearances 20 in. (500 mm) or more when the 20 in. (500 mm) or more when the front and sides of the unit are clear front and sides of the unit are clear 20 in. (500 mm) or more 20 in. (500 mm) when any or more when 2 sides... -
Page 13: Installation Requirements
Installation Installation Requirements Step 1 - Check Equipment Unpack the unit and move it to the final location. Remove Install the unit(s) in the following areas: the carton, taking care not to damage the unit. Inspect • A location that is convenient for installation and not the equipment for damage before installation. -
Page 14: Wall Installation
WALL INSTALLATION NOTE 1. Mark the position of bracket holes based on the Images are for illustration purposes only. dimensions chart. 2. Pre-drill the holes for the expansion bolts. Place a CAUTION washer and nut on the end of each expansion bolt. 3. -
Page 15: Step 4 - Refrigerant Piping Connections
Step 4 - Refrigerant Piping Connections Table 4-1: Piping Sizes System Size Maximum Piping Length 98.4 (30) 164 (50) 164 (50) 246 (75) 246 (75) 246 (75) Minimum Piping Length 10 (3) Max. outdoor-indoor height difference 65.6 (20) 82 (25) 82 (25) 98.4 (30) 98.4 (30) - Page 16 and flare them properly. This ensures efficient operation and minimizes the need for future maintenance. a. Measure the distance between the indoor and outdoor units. b. Using a pipe cutter, cut the pipe a little longer than the measured distance. c.
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Page 17: Minimum Bend Radius
Tightening Torque for Flare Nuts CAUTION Pipe Size Outside Diameter Tightening Torque in. (mm) ft. - lbs. Wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite. Ensure the pipe Ø1/4 (6.35) 13.0 - 18.0 is properly connected. -
Page 18: Step 5 - Power Wiring Connections
NOTE NOTE Use a nitrogen regulator. • When connecting the wires, strictly follow the wiring Attach the low side gauge hose to the 5/16” Schrader diagram found inside the electrical box cover. valve on the outdoor unit service valve. • Choose the cable type according to the local electrical b. - Page 19 CAUTION Power EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment To Midea Unit 18k~60K damage or improper operation. To Midea’s ODU Be sure to comply with local codes while running wire from No polarity 2 wires of the indoor unit to the outdoor unit.
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Page 20: Step 6 - Communication Wiring Connections - Dip Switch Configuration
Step 6 - Communication Table 6-2: Wiring Color Guide Wiring Connections - Dip INDOOR OUTDOOR THERMOSTAT UNIT UNIT Switch Configuration Heat - 2nd WHITE stage Emergency Heat - 1st W1/E BLACK WARNING stage Please refer to the wiring nameplate for the wiring method. Do not connect 24 V AC to S1 -S2, as this will damage the system. -
Page 21: Scenario 1: Evox Heat Pump And Air Handler 3Rd Party 24
• The IDU and ODU need separate power or are from the ODU. See Step 5 - Power Wiring Connections. • IDU and ODU need 2 non-polarity (5 V RS485 S1 and S2 communication) • IDU and Midea wired controller (HA&HB with 20VDC) NOTE HA &... -
Page 22: Scenario 3: Self-Adapt Mode With 3Rd Party Equipment
NOTE For Brand AHU+Midea ODU, the 24V thermostat needs to be connected to a mainboard with a refrigerant sensor, and it should be able to cut off power to the outdoor unit in case of refrigerant leakage. Otherwise, there will be a risk of refrigerant leakage. -
Page 23: 24 V Connection Diagrams
24 V Connection Diagrams Table 6-5: Terminal Function Terminal Location Function Thermostat/Indoor Unit/Outdoor Unit 24 V Power Connection Thermostat/Indoor Unit/Outdoor Unit Common Thermostat/Indoor Unit/Outdoor Unit Low Demand Thermostat/Indoor Unit/Outdoor Unit High Demand Thermostat/Indoor Unit/Outdoor Unit Heating Reversing Valve Thermostat/Indoor Unit/Outdoor Unit Heating Control Outdoor Unit Defrost - (24 V output signal) -
Page 24: Step 7 - Air Evacuation
Y/Y2 COM OY2 OY1 OB/O COM OY2 OY1 Y/Y2 OB/O Fig. 6-12: Wiring for 1H and 1C Thermostat S4-2 Default on, DH function off. S4-4 Default on, W1 and W2 NOTE Turn switch off to activate DH shorted for single stage Aux heat function. -
Page 25: Note On Adding Refrigerant
Outdoor unit 14. Tighten all valve caps hand-tight plus one flat to ensure no leaks. You may tighten it further using a torque wrench if needed. CAUTION Manifold Gauge 500 Microns NOTE ON ADDING REFRIGERANT Compound Pressure DO NOT mix refrigerant types. gauge gauge Some systems require additional charging depending on... -
Page 26: Start-Up
Start-Up Care and Maintenance To help ensure high performance and minimize possible CAUTION equipment failure, periodic maintenance must be performed on this equipment. Maintenance frequency may vary Failure to perform the test run may result in unit damage, depending on geographic areas. property damage, or personal injury. -
Page 27: Appendix
Appendix Outdoor Unit Diagnostic Guide For ease of service, systems are equipped with diagnostic code display LEDs on the indoor and outdoor units. Outdoor diagnostic is displayed on the outdoor unit microprocessor board. There may be a few error codes displayed in the indoor unit that might relate to the outdoor unit’s problems. - Page 28 Product Warranty Information The Warranty Registration below is a requirement to print a warranty certificate. You’re not mandated to register your products to enjoy the Midea Standard Warranty; however, registration is highly recommended. Registering your warranty within 60 days ensures easy access to support and service when needed.
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