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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
Air Handler
LATCHING MODULAR 6-WAY DESIGN
Units Covered In This Manual
SYSTEM
VOLTAGE/
BTUH
TONS
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
4.0
48,000
115/208/230-1
5.0
60,000
115/208/230-1
AIR HANDLER MODEL
PHASE
MAUSE-H18B-2A
MAUSE-H24B-2A
MAUSE-H30B-2A
MAUSE-H36B-2A
MAUSE-H48B-2A
MAUSE-H60B-2A
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Table of Contents
Related Manuals for Midea EVOX G3 MAUSE-H18B-2A
Summary of Contents for Midea EVOX G3 MAUSE-H18B-2A
- Page 1 Installation Manual Air Handler For 18,000 - 60,000 BTU Systems LATCHING MODULAR 6-WAY DESIGN Units Covered In This Manual SYSTEM VOLTAGE/ BTUH AIR HANDLER MODEL TONS PHASE NOTE 18,000 115/208/230-1 MAUSE-H18B-2A Read the entire instruction manual before starting the installation. Images are for illustration 24,000 115/208/230-1 MAUSE-H24B-2A...
- Page 2 Table of Contents Safety Considerations ..............3 Fig. 3-6: Align the center of the two pipes ......24 Table S-1: Allowed Static Pressure Ranges ........4 Fig. 3-7: Spanner and Backup Wrench ........24 Table S-2: Approved Matchups ............5 Fig. 3-8: Bend the Tubing ............24 Table S-3: Minimum Room Area Requirements ......
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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 • For the units that have a wireless network function, assessment specification. USB device access, replacement, and maintenance 3. Maintenance and repair requiring the assistance of operations must be carried out by professional staff. other skilled personnel shall be carried out under •...
- Page 5 machine you purchased. The height of the room cannot minimum. be less than 7.3 ft./2.2 m, and the minimum room area for - That pipe work shall be protected from physical damage. operating or storage should be as specified in the following - Where refrigerant pipes shall comply with national gas table: regulations.
- Page 6 insulation; minimize the risk of flammable gas or vapor being present • that precautions shall be taken to avoid excessive vibration while the work is being performed. or pulsation; 6. General work area • the minimum floor area of the room shall be mentioned in All maintenance staff and others working in the local area the form of a table or a single figure without reference to should be instructed on the nature of the work being carried...
- Page 7 are inherently resistant to being corroded or are suitably 15. Removal and evacuation protected against being so corroded. When breaking into the refrigerant circuit to make repairs 12. Checks to electrical devices - or for any other purpose conventional procedures Repair and maintenance of electrical components shall shall be used.
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Page 8: Refrigerant Charge
recovered safely. Before the task is carried out, an oil and flammable refrigerant. If in doubt, the manufacturer refrigerant sample shall be taken in case analysis is required should be consulted. In addition, a set of calibrated before the re-use of recovered refrigerant. Electrical power weighing scales shall be available and in good working must be available before the task commences. -
Page 9: Potential Ignition Sources
Table S-5: Explanation of symbols displayed on FLAMMABLE REFRIGERANTS is installed shall be so constructed that should any refrigerant leak, it will not the indoor unit or outdoor unit stagnate to create a fire or explosion hazard. This symbol shows that this - If appliances are connected via an air duct system appliance used a flammable to one or more rooms with A2L REFRIGERANTS are... -
Page 10: Installation Accessories
Installation Accessories Table A-2: Optional Accessories Part Name Part Image 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 Lowboy Plenum box installation manual in a safe place and do not discard any other accessories until the installation work has been... -
Page 11: Product Overview
Product Overview Display window Knock out holes Fan module Upper front panel Latches lower front panel Coil module Filter module Gas refrigerant connection Up flow/Down flow/Low boy Liquid refrigerant connection Secondary drain Left flow/Right flow Secondary drain Left flow/Right flow Primary drain Up flow/Down flow/Low boy Primary drain... - Page 12 Dimensions Table D-1: Dimensions Unit Sizes Duct Opening Area Filter Sizes (do not exceed these sizes) System Width Depth Thickness Size in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) 53-7/8 (1,368) 14-1/2 (368) 13 (330) 21-1/2 10-1/4 58-1/8 (1,476) 17-1/2 (445) 16 (407) 1, 2, or 4...
- Page 13 Clearances Fig. C-1: Clearance Dimensions NOTE • For horizontal installation a secondary drain pan that is not supplied must be installed. • For horizontal installation IDU installation requires a 5° tilt (drainpipe side in low position). • Vertical up and horizontal left installation does not need to change the direction of the evaporator.
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Page 14: Installation Requirements
Installation equivalent sealing method between the plenum and the air handler cabinet. Return air must not be drawn from a room Requirements where this air handler or any gas-fueled appliance (e.g., water heater) or carbon monoxide-producing device (e.g., wood fireplace) is installed. CAUTION NOTE Remove all accessories and packing in the air outlet before... - Page 15 The use of flexible duct collars is recommended to minimize from the surrounding air into the insulation. the transmission of vibration/noise into the conditioned • The supply air duct connection should be properly sized space. Where the return air duct is short, or where sound is by using a transition to match the unit opening.
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Page 16: Installation
Installation Step 1 - Mounting the Unit NOTE The unit can be installed vertically up and horizontally right without changing the direction of the evaporator. The unit may be installed in an upflow, downflow, leftflow, or rightflow orientation. Please follow these steps to perform Up flow installation and Right flow installation: 1. - Page 17 5. Loosen the 3 reusable zip ties. See Fig. 1-6. Fig. 1-6: Loosen the Zip Ties Fig. 1-8: Unlock the 4 Latches 6. Locate the temperature sensors for your model. 18-24K model 36K model 8. Turn the fan module 180 degrees and put it under the coil module.
- Page 18 Fig. 1-10: Wire Relocation NOTE The wire body needs to pass through the drain pan’s wire groove and be stuck on the drain pan’s hook. Fig. 1-11: Reroute the Wires EVOX Extreme Heat Air Handler...
- Page 19 10. Relocate the wires in the fan module. Attach the wires with the zip tie of the fan housing Reconnect the connector Fig. 1-14: Seal with Insulation Tape Fig. 1-12: Fan Module Wire Routing LOWBOY INSTALLATION 11. Connect the wire according to the wiring diagram. 1.
- Page 20 Install the zip ties (type B) Install the zip ties (type A) and attach the wires and attach the wires Connect the connectors T1 new location Install the zip ties (type A) and attach the wires Low boy duct kit (Not included with product) Fig.
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Page 21: Vertical Installations
10. Connect the wire according to the wiring diagram. through the drain lines into the air supply. 11. Reassemble the upper, and lower front panels, and filter VERTICAL INSTALLATIONS module. These units operate with negative pressure at the drain 12. Unlock the eight latches. Wrap the insulation tape on connections and a drain trap is required. -
Page 22: Step 3 - Refrigerant Piping Connections
right-hand discharge. is both toxic and may be flammable. Ensure there is no • The seal plug are field supplied as an accessory and refrigerant leakage after completing the installation should be screwed tightly only by hand. work. • Incorrect installation could cause water to flow back into NOTE the unit and flood. - Page 23 flare them properly. This will ensure efficient operation and minimize the need for future maintenance. 1. Measure the distance between the indoor and outdoor units. 2. Using a pipe cutter, cut the pipe a little longer than the measured distance. 3.
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Page 24: Minimum Bend Radius
Tightening Torque for Flare Nuts sized tubing bender to prevent kinking or damaging the tubing. Pipe Size Outside Diameter Tightening Torque f. While firmly gripping the nut, use a torque wrench to in. (mm) ft. - lbs. tighten the flare nut according to the torque values Ø1/4 (6.35) 13.0 - 18.0 listed in Table 3-2. -
Page 25: Step 4 - Power Wiring Connections
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: 4.4 A 115 V: 5.5 A 208/230 V: 2.5 A 208/230 V: 3.5 A 115/208/230 115 V: 6.4A 115 V: 8.0 A... -
Page 26: Outdoor Unit Wiring
OUTDOOR UNIT WIRING 9. Reinstall the field wiring cover. WARNING CAUTION Before performing any electrical or wiring work, turn off the EQUIPMENT DAMAGE HAZARD main power to the system. Failure to follow this caution may result in Prepare the cable for connection. equipment damage or improper operation. - Page 27 Step 5 - Specific Wiring Methods WARNING Please refer to the wiring nameplate for the wiring method. Do not connect the power cord to the communication line, as this may damage the system. Table 5-1: Communication Wiring Sizes Option Communication Type Reocommended Cable Size Non-Polarity RS485 Communication 20 AWG (stranded shielded)
- Page 28 Table 5-2: Wiring Color Guide INDOOR OUTDOOR THERMOSTAT UNIT UNIT Heat - 2nd WHITE stage Emergency Heat - 1st W1/E BLACK stage 4 Way Valve ORANGE Cool - 2nd BROWN stage Cool - 1st YELLOW stage GREEN GRAY Power BLUE Common Power PURPLE...
- Page 29 • 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 &...
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Page 30: Connection Diagrams
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 31 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. 5-5: Never Connect 24 V to S1-S2 S4-1: 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 32 Optional function wiring Y/Y2 COM OY2 OY1 OB/O Fig. 5-12: Wiring for 1H and 1C Thermostat COM OY2 OY1 Y/Y2 OB/O Fig. 5-13: Wiring for 1H and 1C Thermostat NOTE This is the least preferred method of control wiring and should only be used in emergencies.
- Page 33 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. If the thermostat or zone controller has a HUM interface, connect the humidifier directly to the HUM and C ports.
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Page 34: Dip Switch Definitions
DIP switch definitions Fig 5-19: Dip Switch Layout EVOX Extreme Heat Air Handler... - Page 35 Table 5-5: 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 36 Table 5-6: Indoor Unit Dial Code (continued) Dial Control Function Note Code Scenario Maximum continuous runtime allowed before system automatically stages up capacity to satisfy set point. This adds 1 to SW3-1 30 minutes [Default] 90 minutes 5°F to the user set point in the calculated control point to increase capacity and satisfy user set point Cooling and heating Y/Y2 temperature...
- Page 37 Table 5-8: Table A S3 (°F) S3 (°C) Fig. 7-2: Insulate All Connections • Gas and liquid pipes must be insulated separately. Insulating them together will decrease the performance Step 6 - Air Evacuation of the air conditioner. • The insulation material at the joint pipe shall be 2-4 in./5- Please refer to the outdoor unit manual for details.
- Page 38 Test Run CAUTION Failure to perform the test run may result in unit damage, property damage, or personal injury. Before the Test Run A test run must be performed after the entire system has been completely installed. Confirm the following points before performing the test: a.
- Page 39 Appendix Table AP-1: Air Volume Table External Electric 24 V thermostat Wired controller Airflow Static auxiliary Capacity Fan speed volume Pressure heat DIP Switch 24 V terminal engaged DIP Switch Mode (CFM) Range module Cooling Turbo — SW3-4=ON Y2/Y — Cool Cooling High —...
- Page 40 External Electric 24 V thermostat Wired controller Airflow Static auxiliary Capacity Fan speed volume Pressure heat DIP Switch 24 V terminal engaged DIP Switch Mode (CFM) Range module Cooling Turbo — SW3-4=ON Y2/Y — Cool 1235 Cooling High — SW3-4=OFF Y2/Y —...
- Page 41 Table AP-2: 24 V Signal Chart 24 V input terminal Mode Priority Y/Y2 E/AUX Fan speed Display 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 Electric heater kit 1 Turbo...
- Page 42 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 43 This page is intentionally left blank.
- Page 44 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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