Download
Share
Print this page
Midea MAPHE-H18B-2A Installation Manual
  1. Manuals
  2. Brands
  3. Midea Manuals
  4. Air Handlers
  5. MAPHE-H18B-2A
  6. Installation manual
Midea MAPHE-H18B-2A Installation Manual

Midea MAPHE-H18B-2A Installation Manual

Ceiling mounted air handler
Hide thumbs Also See for MAPHE-H18B-2A:

Advertisement

Quick Links

Download this manual
For 18,000 - 36,000 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
Ceiling Mounted Air Handler
Units Covered In This Manual
SYSTEM
VOLTAGE/
BTUH
TONS
PHASE
1.5
18,000
115/208/230-1
2.0
24,000
115/208/230-1
2.5
30,000
115/208/230-1
3.0
36,000
115/208/230-1
AIR HANDLER MODEL
MAPHE-H18B-2A
MAPHE-H24B-2A
MAPHE-H30B-2A
MAPHE-H36B-2A

Advertisement

loading
Need help?

Need help?

Do you have a question about the MAPHE-H18B-2A and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Midea MAPHE-H18B-2A

Summary of Contents for Midea MAPHE-H18B-2A

  • Page 1 SYSTEM VOLTAGE/ BTUH AIR HANDLER MODEL installation. Images are for illustration purposes only. Actual TONS PHASE models may differ slightly. 18,000 115/208/230-1 MAPHE-H18B-2A 24,000 115/208/230-1 MAPHE-H24B-2A 30,000 115/208/230-1 MAPHE-H30B-2A 36,000 115/208/230-1 MAPHE-H36B-2A Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 2 Table of Contents Scenario 3: Self-Adapt Mode with 3rd Party Equipment ......27 Safety Considerations ................3 Fig. 6-4: Scenario 3 Wiring Diagram and Dip Switch Settings ..27 Table S-1: Allowed Static Pressure Ranges ............5 24 V Connection Diagrams .................. 27 Table S-2: Approved Matchups ................5 Table 6-4: Control Logic..................
  • Page 3 Safety Considerations 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 It is crucial to read the Safety Precautions Before Operation play with the appliance.
  • Page 4 injury or death caused by insulation broken cords. the information for details in the “indoor unit installation” • Excessive Weight Hazard - Use two or more people and “outdoor unit installation” sections. when moving and installing the unit. Failure to do so WARNING can result in back or other types of injury.
  • Page 5 6. Be careful that foreign matter(oil, water,etc) does not Air Handler Unit Outdoor Unit Type (208/230 V) enter the piping. Also, when storing the piping, securely MAPHE-H18B-2A MO1BE-H18B-2A seal the opening by pinching, taping, etc. MAPHE-H24B-2A MO1BE-H24B-2A Regular 7. Do not pierce or burn.
  • Page 6 - Where refrigerant pipes shall comply with national gas • that precautions shall be taken to avoid excessive vibration regulations. or pulsation; - That mechanical connections shall be accessible for • the minimum floor area of the room shall be mentioned in maintenance purposes.
  • Page 7 Works shall be undertaken under a controlled procedure to unless the components are constructed of materials that minimize the risk of flammable gas or vapor being present are inherently resistant to being corroded or are suitably while the work is being performed. protected against being so corroded.
  • Page 8 removal of refrigerant. It is recommended good practice that all refrigerants are 15. Removal and evacuation recovered safely. Before the task is carried out, an oil and When breaking into the refrigerant circuit to make repairs refrigerant sample shall be taken in case analysis is required - or for any other purpose conventional procedures before the re-use of recovered refrigerant.
  • Page 9 is at hand and shall be suitable for the recovery of the 21. Unventilated areas flammable refrigerant. If in doubt, the manufacturer - An unventilated area where the appliance using should be consulted. In addition, a set of calibrated FLAMMABLE REFRIGERANTS is installed shall be so weighing scales shall be available and in good working constructed that should any refrigerant leak, it will not order.
  • Page 10 Installation Accessories Upper foam The system is shipped with the following accessories. Use all the installation parts and accessories to install the system. Improper installation may result in water leakage, electrical shock, and fire, or cause the equipment to fail. Keep the installation manual in a safe place and do not discard any other accessories until the installation work has been completed.
  • Page 11 Product Overview Service Disconnect Connect 24V outdoor unit Service Disconnect NOTE: Service Disconnect shall be selected as required by Local, regional, and national codes. Air inlet Connecting pipe Electric control cabinet Air outlet Outdoor Unit (A) Drainpipe Outdoor Unit (B) Fig.
  • Page 12 Dimensions Fig. D-1: Unit Dimensions Please refer to the diagrams to locate the four positioning screw bolt holes on the ceiling. Be sure to mark the places where you will drill ceiling hook holes. Table D-1: Dimensions Unit: inches (mm) Size Of Air Outlet Air Return Opening...
  • Page 13 Clearances Airflow Options The unit can be installed in two different airflow The distance between the mounted indoor unit should meet configurations. the specifications illustrated in the following diagram. Fig. C-3: Airflow Configurations Fig. C-1: Clearance Dimensions Fig. C-2: Maintenance Clearance EVOX Extreme Heat Ceiling Mounted Air Handler...
  • Page 14 Installation WARNING Requirements THE UNIT MUST BE INSTALLED IN A LOCATION THAT MEETS THE FOLLOWING REQUIREMENTS: NOTE Before installing the indoor unit, you must choose an appropriate location. The following are standards that will help you choose an appropriate location for the unit. WARNING DO NOT INSTALL IN THE FOLLOWING LOCATIONS: •...
  • Page 15 Installation Step 2 - Drain Piping Step 1 - Hang the Unit Connect The Drainpipe The drainpipe is used to drain water away from the unit. Improper installation may cause unit and property damage 1. Please turn the product face down and lift the mounting bracket onto the 4 pre-assembled suspension screws, locking them with nuts.
  • Page 16 Step 3 - Duct Connection 1. Attach the mouth of the drain hose to the unit’s outlet pipe. Sheath the mouth of the hose and clip it firmly with a pipe clasp. 2. Cover the drainpipe with heat insulation to prevent condensation and leakage.
  • Page 17 Table 3-1: Airflow Performance fire, carbon monoxide poisoning, explosion, personal injury, or property damage. Model Static pres- External Static Pressure (in.w.c.) Sheet metal ductwork run in unconditioned spaces must be sure insulated and covered with a vapor barrier. Fibrous ductwork Dialling code may be used if constructed and installed following SMACNA Construction Standard on Fibrous Glass Ducts.
  • Page 18 Step 4 - Refrigerant Piping brazing them, purge them with nitrogen to remove dirt and moisture before connecting them to an indoor or Connections outdoor unit. • Insulate both suction and liquid lines separately with insulation size as per Table 8-1. WARNING CAUTION All field piping must be completed by a licensed technician...
  • Page 19 Cut pipes direction. Once the ends are flared, it is impossible to When preparing refrigerant pipes, take extra care to cut and put them on or change their direction. flare them properly. This will ensure efficient operation and minimize the need for future maintenance. 1.
  • Page 20 Fig. 4-6: Flare Shape NOTE Use both a spanner and a torque wrench when connecting or disconnecting pipes to/from the unit. Table 4-2: Flare Dimensions/Tightening Torque Pipe Size Outside Diameter Flare Dimensions (A) in. (mm) in. (mm) Ø1/4 (6.35) 11/23 - 23/64 (~9.1) Ø3/8 (9.52) 1/2 - 33/64 (~13.2) Ø1/2 (12.7)
  • Page 21 and evacuate the system (refer to the Air Evacuation section of this manual). 8. Brazing Adapter (Optional) When flare to braze adapter is used, follow these steps: Refer to the liquid line and gas line connection O.D. sizes in Table 4-1 based on the model being installed. Cut and deburr the tubing (review “Remove the Burrs”...
  • Page 22 Confirmation of Indoor Unit Table CIU-1: Units Without Electric Heat Branch Circuit Unit Volts-Phase Rated Current Min. Wire Size Size (Minimum Circuit Ampacity) Fuse/CKT BKR Amps 115 V: 4.0 A 115 V: 6.0 A 208/230 V: 3.5 A 208/230 V: 5.0 A 115 V: 5.5 A 115 V: 7.0 A 208/230 V: 3.5 A...
  • Page 23 NOTE The diagrams are for explanation purposes only. Your machine may be slightly different. The actual diagram shall prevail. Service Disconnect shall be selected as required by Local, regional, and national codes. CAUTION • While connecting the wires, please strictly follow the wiring diagram.
  • Page 24 to be removed, and the red motor pair plug needs to be connected. When the motor is plugged in red, the internal power supply must be 115V. If it is powered by a 208-230 V power supply, the motor will be damaged. OUTDOOR UNIT WIRING WARNING Before performing any electrical or wiring work, turn off the...
  • Page 25 Step 6 - Specific Wiring Table 6-2: Wiring Color Guide Methods INDOOR OUTDOOR THERMOSTAT UNIT UNIT Heat - 2nd Please refer to the wiring nameplate for the wiring method. WHITE stage Do not connect the power cord to the communication line, Emergency as this may damage the system.
  • Page 26 • The IDU and ODU need separate power or are from the ODU. See Step 4 - 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 20 VDC) NOTE HA &...
  • Page 27 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 28 24 V must never be connected to S1 – S2. All wiring must be in compliance with the above scenarios. Incorrect wiring will cause irreversible damage to the control. Fig. 6-5: Never Connect 24 V to S1-S2 Default ON: For single-stage supplemental heat, W1 and W2 are connected. OFF: W1 and W2 are controlled independently for dual-stage supplemental heat.
  • Page 29 Optional Function Wiring Y/Y2 COM OY2 OY1 OB/O Fig. 6-11: Wiring for 1H and 1C Thermostat Y/Y2 COM OY2 OY1 OB/O Fig. 6-12: Wiring for 1H and 1C Thermostat NOTE This is the least preferred method of control wiring and should only be used in emergencies.
  • Page 30 Humidifier control: To connect a humidifier, utilize the passive signal “WORK” output (CN23) port as well as the R and C wires on the controller, and wire the humidistat and humidifier per the above wiring diagram. When the fan is running, the CN23 relay will be closed, which will allow power to the humidifier when the humidistat is below the humidity setpoint.
  • Page 31 Dip Switch Definitions Fig 6-18: Dip Switch Layout EVOX Extreme Heat Ceiling Mounted Air Handler...
  • Page 32 Table 6-5: Function combination table of SW1-1 Function DIP switch settings: The 24 V thermostat mode needs to refer to the following and SW1-4 settings: IDU & ODU Control Type Note Connection Wired (S1+S2) / 24 V controller / connection Auto 24 V (S1+S2) / 24 V...
  • Page 33 Table 6-6: Indoor Unit Dial Code Dial Control Function Note Code Scenario SW1-2 1,2,3 Anti-cold blow protection option [Default] YES Single cooling / heating and cooling SW1-3 1,2,3 Cooling [Default] Cooling & Heating options Only afects Compressor Running (demand compressor, SW2-1 working with heat pump+ Electric Compressor slower speed...
  • Page 34 Table 6-8: Table A 24 V Tstat, S1+S2 S3 (°F) S3 (°C) Control Scenario Wired Controller S1+S2 Full 24 V Address DIP switch: Address dialing S1+SW8: When the user uses the centralized controller, address dialing is required. Network address: The address silkscreen is the NET address, which is composed of a 16-bit address rotary code S1 plus a two-digit DIP switch SW8 [Set during engineering installation, no network function does not need to be set]...
  • Page 35 of the air conditioner. d. The refrigeration system does not leak. • The insulation material at the joint pipe shall be 2-4 in./5- e. The drainage system is unimpeded and draining to a 10 cm longer than the gap of the insulation material. safe location.
  • Page 36 Appendix Table AP-1: Air Volume Table 24V thermostat Wired controller Airflow External Static Capacity Fan speed Electric heater kit volume Pressure Range DIP Switch 24 V terminal engaged DIP Switch Mode (CFM) Cooling Turbo — SW3-4=ON Y2/Y — Cool Cooling High —...
  • Page 37 Table AP-1: Air Volume Table (continued) 24V thermostat Wired controller Airflow External Static Capacity Fan speed Electric heater kit volume Pressure Range DIP Switch 24 V terminal engaged DIP Switch Mode (CFM) Cooling Turbo — SW3-4=ON Y2/Y — Cool 1188 Cooling High —...
  • Page 38 Table AP-2: 24 V Signal Chart 24V input terminal Mode Priority Y/Y2 E/AUX Display speed Cooling stage 1 Cooling stage 2 High Dehumidification 1 Dehumidification 2 Heat pump stage 1 Heat pump stage 2 High Heat pump stage 2 High Emergency heat Turbo Emergency heat...
  • Page 39 Indoor Unit Diagnostic Guide For ease of service, systems are equipped with diagnostic code display LEDs on the indoor and outdoor units. Outdoor diagnostics are displayed on the outdoor unit microprocessor board. The indoor unit may display a few error codes that might relate to the outdoor unit’s problems.
  • Page 40 Installation Guide For AHU Using 115 V Power Supply 1. Remove the cover. 4. Remove the red connector from the 24V transformer. Fig. AP-1: Open the Cover 2. When using a 115 V power supply, the fan motor wiring Fig. AP-4: Remove the Red Connector requires the use of a 115 V fan motor pair plug.
  • Page 41 Electric Heat Kit Installation Specification of connecting wires between protectors and fuses: 12 AWG. (Only for HEAT function models) Supplementary heater kit Module installation and NOTE Wiring Operation Installation must be performed by a licensed contractor. 1. Open the air inlet channel panel. Please take necessary precautions when performing the installation operation.
  • Page 42 8. Remove the eight screws to remove the guide plate NOTE 18K/24K/30K: 6 mounting screws need to be unscrewed. 36K: 8 mounting screws need to be unscrewed. 4. Paste the air circuit breaker label on the control box cover outside. Fig.
  • Page 43 Install the electronic controller assembly. Fig. AP-19: Replace the Control Box Cover Install the air inlet channel panel. Fig. AP-17: Attach Wires Into the Clasps Install the electronic controller assembly. Fig. AP-20: Replace the Inlet Channel Panel Confirmation Of Indoor Unit NOTE Supplementary heater kit wiring diagram packed with the accessories.
  • Page 44 Table AP-7: Heat Kit Data Circuit 1 208/230 V Internal Circuit Heater Part No. Heater KW Protection Heater Amps MCA (1) MOP (1) EAH-03D (UL) 2.26/2.75 Ckt Bkr 11.0/12.5 14.0/16.0 15.0/20.0 EAH-05D (UL) 3.76/4.54 Ckt Bkr 18.5/20.0 23.5/25.0 25.0/30.0 EAH-08D (UL) 5.90/7.10 Ckt Bkr 29.0/31.5...
  • Page 45 Engineering Mode Access Conditions When the unit is switched on or in standby mode and not locked, press and hold the key combination “On/Off+Air Speed” for 7 seconds. 1. In engineering mode, when the number code is 23, press and hold the “On/Off” key for 2 seconds to enter the air volume adjustment dialing code for cooling, display Ch, press the “OK”...
  • Page 46 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.

This manual is also suitable for:

Maphe-h24b-2aMaphe-h30b-2aMaphe-h36b-2a