Related Manuals for Midea 18K
Summary of Contents for Midea 18K
- Page 1 AIR-HANDLER AIR CONDITIONERS Owner’s Manual & Installation Manual Installation Manual IMPORTANT NOTE: Read this manual carefully before installing or operating your new air conditioning unit. Make sure to save this manual for future reference.
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Page 2: Table Of Contents
Owner’s Manual & Installation Manual SAFETY PRECAUTIONS ..................3 ACCESSORIES ....................... 7 INDOOR UNIT INSTALLATION ................ 8 OUTDOOR UNIT INSTALLATION ..............30 WIRING ........................33 SPECIFICATION ....................48 AIR EVACUATION ....................51 TEST RUN ......................53 Read This Manual Inside you’ll find many helpful hints on how to use and maintain your air conditioner properly. -
Page 3: Safety Precautions
SAFETY PRECAUTIONS To prevent injury to the user or other people and property damage, the instructions shown here must be followed. Incorrect operation due to ignoring of instructions may cause harm or damage. The level of risk is shown by the following indications. This symbol indicates the possibility of personnel injury or WARNING loss of life. - Page 4 CAUTION • Turn off the air conditioner and disconnect the power if you are not going to use it for a long time. • Make sure that water condensation can drain unhindered from the unit. • Do not operate the air conditioner with wet hands. This may cause electric shock. •...
- Page 5 WARNINGS FOR PRODUCT INSTALLATION Installation must be performed by an authorized dealer or specialist. Defective installation can cause water leakage, electrical shock, or fire. 2. Installation must be performed according to the installation instructions. Improper installation can cause water leakage, electrical shock, or fire. (In North America, installation must be performed in accordance with the requirement of NEC or CEC by authorized personnel only.) 3.
- Page 6 NOTICE The functional static pressure range of the air conditioner on site is 0-0.80 in-H2O (0-200 Pa). The data below represents the static pressures at full required air flow used for AHRI testing. Model 18-24K 30-36K 48-60K Pressure 0.10 in-H2O (25 Pa) 0.15 in-H2O (37 Pa) 0.20 in-H2O (50 Pa) NOTICE...
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Page 7: Accessories
ACCESSORIES The air conditioning system comes with the following accessories. Use all of the installation parts and accessories to install the air conditioner. Improper installation may result in water leakage, electrical shock and fire, or equipment failure. Accessories (Packed with the indoor unit) Name Shape Quantity... -
Page 8: Indoor Unit Installation
INDOOR UNIT INSTALLATION Indoor Unit Parts WARNING Please apply sealant around the places Coil compartment (Access panel removed) where the wires, refrigerant pipes and condensate pipes enter the cabinet. Upflow Upflow Indoor Unit Installation Instructions drain The indoor unit should be installed in Horizontal drain pan a location that meets the following Horizontal drain pan... - Page 9 Plenum Clearances MINIMUM CLEARANCE OF 25.4mm/1″ALL SIDES FLEXIBLE DUCT COLLAR The outlet side pipe length is 1.5m/59”. Vertical Installations (unit: mm/in) MODEL (Btu/h) 18K~24K 30K~48K Dimensions 1143 1245 1346 Length of A inch Length of B inch Length of C...
- Page 10 Recommended size of filter MODEL (Btu/h) 18K~24K 30K~48K 406.4 495.3 584.2 Length of W inch (unit: mm/inch) Length of D inch 25.4 25.4 25.4 Length of inch NOTICE This product filter is only used for energy efficiency sampling test, the user needs to install a filter of their choice.
- Page 11 WARNING • A field-fabricated secondary drain pan, with a drain pipe to the outside of the building, is required in all installations over a finished living space or in any area that may be damaged by overflow from the main drain pan. In some localities, local codes may require a secondary drain pan for any horizontal installation.
- Page 12 Reversing instructions: NOTICE 1. Remove the filter door, then take the Vertical up and horizontal left filter off. installation does not need to change the direction of evaporator. NOTICE The unit may be installed in one of the upflow, downflow, horizontal left or horizontal right orientations.
- Page 13 4. Unplug temperature sensors T1, T2, 6. Take out the evaporator and drain T2A, T2B and electronic expansion pan and rotate 180°. valve (EEV) from the control board. T1: Room temperature sensor T2: Evaporator central sensor plug T2A: Evaporator intput sensor plug T2B: Evaporator output sensor plug T2A&T2B 7.
- Page 14 9. Reinstall T1, T2, T2A, T2B sensor 10. The evaporator is assembled in place. plugs and electronic expansion valve (EEV) and tie up the sensor wires. NOTICE The wire body needs to pass through the wire groove from the drain pan and be stuck on the hook of the drain pan.
- Page 15 13. Reassemble the upper cover. 14. Reinstal the filter and filter cover plate. 15. Connect the pipes. 16. Install the drainage pipes. Drainpipe Installation The drainpipe is used to drain water away WARNING from the unit. Improper installation may cause unit and property damage. After removal of drain pan plug(s), check drain hole(s) to verify that drain opening is fully open and free...
- Page 16 Vertical Installations These units operate with a negative Anti-syphon >50mm(2”) pressure at the drain connections and a air vent drain trap is required. >50mm(2”) The trap needs to be installed as close to >50mm(2”) Vent T Lean over the unit as possible. Make sure the top of 1/50 the trap is below the connection to the Drain Trap...
- Page 17 REFRIGERANT PIPING CONNECTION Safety Precautions WARNING • All field piping must be completed by a licensed technician and must comply with the local and national regulations. • When the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration in the room from exceeding the safety limit in the event of refrigerant leakage.
- Page 18 Name Shape Quantity (PC) Parts you must purchase Liquid side Ø9.52mm (3/8in) separately. Connecting pipe Consult the dealer about Ø19mm (3/4in) 4 Ton assembly Gas side the proper pipe size of the Ø22mm (7/8in) 5 Ton only unit you purchased. Connection Instructions –...
- Page 19 5. Clamp flare form on the end of the pipe. 1. When connecting the flare The end of the pipe must extend beyond nuts, apply a thin coat of the flare form. refrigeration oil to the flared ends of the pipes. Flare form 2.
- Page 20 60K Air-Handler Air Conditioners NOTE ON MINIMUM BEND RADIUS Refrigerant Piping Connection Carefully bend the tubing in the middle Complete the indoor unit connection pipe according to the diagram below. assembly as shown below, use flare-to- braze (3/4” to 7/8”) and flare-to-braze DO NOT bend the tubing more than (3/8”...
- Page 21 Installation of Electric Auxiliary Installation Requirements Heat Module (for some models) Before installation, please confirm (not supplied) the electric auxiliary heat module and supplied accessories are complete and Accessories free of any damage. Do not attempt to install if damage is present. Name Shape Quantity...
- Page 22 2. Remove the terminal block and power 4. Tighten the mounting screws. wires, loosen the screws, and remove screws the electric auxiliary heating cover. 5. Wiring according to the wiring nameplate. 3. Install the electric auxiliary heating assembly into the chassis shell from 6.
- Page 23 After the electric heating wiring is connected, please NOTICE confirm before power on: Electric auxiliary heating • Check all wiring and ensure secure connection of wiring diagram packed with all wiring. the accessories. • Ensure that wire size is properly selected per NEC or local codes.
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- Page 25 Electric auxiliary heating wiring diagram 3KW/5KW HEAT KIT :thermal cut-out :thermal link, self-resetting Aux-Heat HTR1 control signal TO INDOOR UNIT RELAY1 MAINBOARD BLACK cn12 BLACK TO INDOOR UNIT MAINBOARD cn11 (green) 1(L1) 2(L2) 3(S) POWER A POWER B NOTE1: This symbol indicates the element is optional, The wiring type of the actual NOTE3: TO BE WIRED IN ACCORDANCE WITH NEC unit shall prevail.
- Page 26 8KW/10KW HEAT KIT :thermal cut-out :thermal link, self-resetting BLACK RELAY1 HTR1 BLACK Aux-Heat control signal BLACK RELAY2 HTR2 BLACK BLACK BLACK (green) 1(L1) 2(L2) 3(S) POWER A POWER B NOTE1: This symbol indicates the element is optional, The wiring type of the actual NOTE3: TO BE WIRED IN ACCORDANCE WITH NEC unit shall prevail.
- Page 27 15KW HEAT KIT :thermal cut-out :thermal link, self-resetting HTR3 RELAY4 BLACK RELAY1 HTR1 Aux-Heat control signal BLACK RELAY2 HTR2 (green) 1(L1) 2(L2) 3(S) POWER B POWER C POWER A NOTE1: This symbol indicates the element is optional, The wiring type of the actualunit shall prevail. NOTE3: TO BE WIRED IN ACCORDANCE WITH NEC NOTE2: AND LOCAL CODES.
- Page 28 20KW HEAT KIT :thermal cut-out :thermal link, self-resetting HTR4 RELAY4 BLACK BLACK BLACK HTR3 RELAY3 BLACK BLACK BLACK HTR1 RELAY1 Aux-Heat BLACK BLACK control signal BLACK BLUE HTR2 RELAY2 BLACK BLACK BLACK (green) 1(L1) 2(L2) 3(S) POWER B POWER C POWER A NOTE1: This symbol indicates the element is optional,...
- Page 29 25KW HEAT KIT : thermal cut-out : thermal link, self-resetting HTR5 RELAY5 BLACK BLACK BLACK HTR4 RELAY4 BLACK BLACK BLACK HTR3 RELAY3 BLACK BLACK BLACK BLACK RELAY1 HTR1 Aux-Heat BLACK BLACK control signal BLUE BLACK HTR2 RELAY2 BLACK BLACK BLACK (green) 1(L1) 2(L2) 3(S)
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Page 30: Outdoor Unit Installation
OUTDOOR UNIT INSTALLATION Install the unit by following local codes DO NOT install unit in the following and regulations, they may differ slightly locations: between diferent regions. • Near an obstacle that will block air inlets and outlets. • Near a public street, crowded areas, or where noise from the unit will disturb others. - Page 31 NOTE: There are two different types of IN COLD CLIMATES drain fittings depending on the type of outdoor unit. In cold climates, make sure that the drain hose is as vertical as possible to If the drain fitting comes with a rubber ensure swift water drainage.
- Page 32 Unit Mounting Dimensions The following is a list of different outdoor unit sizes and the distance between their mounting feet. Prepare the installation base of the unit according to the dimensions below. Outdoor Unit Types and Specifications Split Type Outdoor Unit Outdoor Unit Dimensions Mounting Dimensions (unit: mm/inch)
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Page 33: Wiring
WIRING WARNING BEFORE PERFORMING ANY ELECTRICAL OR WIRING WORK, TURN OFF THE MAIN POWER TO THE SYSTEM. BEFORE PERFORMING ANY ELECTRICAL WORK, READ THESE CAUTIONS. 1. All wiring must comply with local and national electrical Codes and Regulations and must be installed by a licensed electrician. 2. - Page 34 Electrical disconnect Electrical disconnect (purchased separately) Electrical disconnect (purchased separately) (purchased separately) Indoor unit power wires Electrical heater unit power wires Outdoor unit power wires Electrical Outdoor unit Indoor unit heater unit Indoor & Outdoor connective wires (purchased separately) NOTICE The diagrams are for explanation purpose only.
- Page 35 3. Connect the u-lugs to the terminals.Match the wire colors/ Terminal block labels with the labels on the terminal block. Firmly screw the u-lug of each wire to its corresponding terminal. Connecting cable Power supply cord Conduit panel Wire Cover TO POWER SOURCE TO POWER SOURCE Please select the appropriate through-hole according...
- Page 36 Indoor Unit Wiring 1. Prepare the cable for connection. CAUTION a. Using wire strippers, strip the rubber jacket from both ends of the signal • While connecting the wires, please cable to reveal about 15cm (6”) of strictly follow the wiring diagram. the wire.
- Page 37 24V AC to S1 - S2, as this will damage the system. Connection method B: This is the preferred method when using a 24V thermostat with Midea indoor and outdoor unit. To use a 24V thermostat, you need to refer to the following wiring:...
- Page 38 Please ensure that thermostat configuration is set up for B functionality. Non-communication scheme wiring reference Note: These methods are for use with a Midea outdoor unit and a third party indoor unit or Cased coil and gas furnace. The following wiring diagram are suitable for the AHU and ODU with 24V thermostat.
- Page 39 • Wiring for 3H and 2C thermostat: W1/E THERMOSTAT Y1 Y2 B W D W1 W2 INDOOR UNIT S4-1 DIP switch off S4-2 DIP switch off Perform disconnection and Disconnect and short short-circuit to achieve circuit to realize heating partition, control or dehumidification segment •...
- Page 40 • Wiring for 1H and 1C thermostat: • Condensate overflow switch: The unit will accommodate a remote condensate overflow switch. To enable, remove jumper J1, and connect the installer provided condensate THERMOSTAT overflow device to CN5 per W1 W2 Y1 Y2 B W D below.
- Page 41 To connect a humidifier, utilize the Control Logic passive signal “WORK” output (CN23) port as well as the G and C wires on the Indoor Unit Connector controller, and wire the humidistat and Connector Purpose humidifier per above wiring diagram. 24V Power Connection When the fan is running, the CN23 relay Common...
- Page 42 Functional Display Mode Priority Y/Y2 W2 E/AUX DH/DS/BK Display Shut down Cooling Cooling 2 Dehumidification 1 Dehumidification 2 Heating 1 Heating 2 Heating 2 Electric heating 1 Electric heating 1 Electric heating 2 Heating 1 + electric heating 1 Heating 1 + electric heating 1 Heating 2 + electric heating 1 Heating 2 + electric heating 1 Heating 2 + electric heating 1...
- Page 43 DIP Switch Definitions Function Function Rotary switch DIP switch Address Address switches 24V thermostat DIP switch interface 24V control DIP switch Function DIP switch Static pressure DIP switch Page 43 ...
- Page 44 Function DIP Switch Settings: The 24V thermostat mode needs to refer to the following settings. 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 SW4-1 000 is the default SW4-2 000/001/010/011/100/101/110/111, internal machines with different abilities, electric heating and PSC classification for use SW4-3 Indoor unit dial code...
- Page 45 Outdoor unit DIP Switch setting Dial code Features Outdoor throttling (normally Indoor throttling (normally SW-1 Metering device location closed single-way solenoid closed single-way solenoid valve is not powered on). valve store). SW-2 Communication setting 24V communication scheme 485 communication scheme The cooling/heating target The cooling/heating target Strong cold and strong...
- Page 46 Air volume table SW4-1, 2, 3 setting 001 air volume 010 air volume 011 air volume (default) Model 000 gear (default) (CFM) (CFM) (CFM) Model 001 air volume(CFM) 010 air volume(CFM) 011 air volume(CFM) air volume (CFM) air volume(CFM) 10KW 10KW, 8KW 5KW 3KW 5KW,...
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Page 48: Specification
SPECIFICATIONS COOLING AND HEATING SPECIFICATIONS • Air Handler Page 48 ... - Page 49 • Standard Page 49 ...
- Page 50 • Cold Climate Heat Pump Page 50 ...
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Page 51: Air Evacuation
AIR EVACUATION Preparations and Precautions Air and foreign matter in the refrigerant circuit can cause abnormal rises in pressure, which can damage the Heat Pump, reduce its efficiency, and cause injury. Use a vacuum pump and manifold gauge to evacuate the refrigerant circuit, removing any non-condensable gas and moisture from the system. - Page 52 10. Watch the Pressure Gauge for one 12. Using hexagonal wrench, fully open minute to make sure that there is both the high pressure and low pressure no change in pressure. The Pressure valves. Gauge should read slightly higher 13. Tighten valve caps on all three valves than atmospheric pressure.
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Page 53: Test Run
TEST RUN b. Check to see that the drainage Before Test Run system is unimpeded and draining smoothly. A test run must be performed after the entire system has been completely c. Ensure there is no vibration or installed. Confirm the following points abnormal noise during operation.