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Modular Air Handling Unit

MKZ series

Product Catalogue 3000 ~200000m3/h (1800~125000CFM)

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Contents

1. Nomenclature

2. Introduction

3. Features

4. Component options

5. Typical Structure

6. Mechanical Specifications

7. Quick Selection

8. Section Data

9. Typical combination

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1. Nomenclature

MKZ 05 Y 4 / C – A 06 09 A01

Note: 1. Modulus is the internal dimension of unit. The external dimension of unit can be

calculated as followed: Width = width modulus × 100 + panel thickness ×2; Height = height modulus × 100 + panel thickness × 2+height of base frame. 2. Pipe connecting mode: Along to the air flow direction, if the connection pipes are

on the left side, the unit is left-handed connection unit. Otherwise is the right-handed connection unit.

Midea Modular Air Handling Unit

Air Flow, ×1000m3/h

Pipe connecting mode, Y: right-handed; Z: left-handed

Coil rows, 2: 2-rows; 4: 4-rows; 6: 6-rows; 8: 8-rows.

Design serial No., C: 3rd generation

Customized No., A01: the 1st time

Width modulus, M, 1M= 100mm

Height modulus, M, 1M= 100mm

Panel thickness, A: 25mm; B: 35mm; Omit: 50mm.

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2. Introduction Midea have been manufacturing air handling units throughout the world for a couple of years. Midea participated in compilation of China Standard about central-station air handling units. This proven abundant experience enables us to develop a world class air handling unit; the 3rd generation of Modular Air Handling Unit (MAHU) is a combination of the elements as follow:

Quality The Midea MAHU meet the demands for improved indoor air quality, low sound, high operating efficiency and smaller mechanical rooms require a better product for today’s air handler market. The MAHU’s construction provides unequaled thermal efficiencies and low leak rates. In addition, the MAHU offers tremendous flexibility in sizing, component options, and unit arrangements to meet the indoor air quality, operating efficiency, sound and installation requirements for today’s extensive commercial and custom markets. Midea combines comprehensive performance certifications with thorough laboratory testing and manufacturing methods. Together, these elements assure that each MAHU operates predictably and reliably throughout the life of the unit.

Flexibility By virtue of its unique frameless design, the Midea MAHU offers tremendous flexibility. Numerous section and component options, and the ability to arrange components in whatever arrangement is required, allow to be customized to the requirements of each job, without expensive field modifications. Finally, the MAHU can be shipped as a completely assembled unit, in modules or by component sections that require smaller sections for passage through the building.

Serviceability The Midea MAHU is designed to provide easy access to interior components for routine maintenance and service. The easy-to-move panels and access doors of the units provide complete access to the unit interior and components.

Selection software To help the customer easily define their product requirements, a user-friendly software selection program is provided. The program leads the user through the selection process by pertinent input data for all components required. Component sections are selected by placing them on a configuration screen (Figure 4). Once the unit layout is defined, the options and accessories are identified. The program gives immediate feedback regarding fan and coil selection, offering a choice of many different options based on the performance inputs. Once final component selections

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have been made, the program provides all output needed for specification, including unit specification, dimension drawings, weights, fan curves, etc.

Wide usage The Midea MAHU can be widely used in hotels, restaurants, factories, hospitals, airport, railway stations, exhibition halls, office buildings, shopping centers, laboratories and other central air-conditioning systems.

3. Features

Low leakage structure Frameless structure and modulus panel design. Panels are double-skin with injection of high density polyurethane. The outer skin is anti-corrosion color-coated steel sheet, the inner skin is galvanized steel sheet, the density of polyurethane is more than 50kg/m3, and the thermal conductivity is 0.03W/m2K. The unit cabinet consists of panels attaching to each other by combining with male and female plastic cards and

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sealing strip. The air leakage rate is less than 0.29%. The thermal transmittance of the unit casing reaches the Class T2 of Eurovent standard EN1886. The thermal bridging factor of the casing reaches Class TB2. Units will not sweat when exterior room temperature is 27 ℃, relative humidity is 90%.

Figure 1 Structure Figure 2 Steel joint

1 Panel Ⅰ 2 Panel Ⅱ

3 Plastic article 4 Plastic article reinforcement

5 Color-coated steel sheet 6 Galvanized steel sheet

7 polyurethane foam 8,9 Sealing material

10,11,12 Sealing parts of plastic card article

Modulus design The MAHU adopt modulus design. Unit dimensions, including width, height and length, change according to the modulus (M). 1M=100mm. The combination and installation of the modular unit is flexible.

Free combination of numerous function sections Mixing section, primary efficiency filter section, medium efficiency filter section, high efficiency filter section, cooling coil section, heating section, humidifier section, sound attenuator section, service section, heat recovery section, fan section. Different function sections can be selected according to the specific applications.

Attractive outlook The MAHU adopt frameless structure and the insert fastening bolts are covered by haps which are accordance with the color of the outer skin, and clear, smooth appearance make the outlook attractive. Furthermore the unit casing strength reaches Class D1 of Eurovent standard EN1886.

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4. Component options and accessories Unit dimension 3M increments for height and width, 1M=100mm Panel 0.5mm thickness, color-coated outer steel sheet, galvanized

inner steel sheet ; 25mm, 35mm, 50mm thickness, polyurethane foam filler

Base frame Galvanized steel sheet or channel steel Fan Forward curved or backward curved Coil Copper tube, aluminum fin, galvanized steel coil frame;

2 rows, 4 rows, 6 rows, 8 rows coil Eliminator PVC or aluminum Drain pan Galvanized steel or stainless steel Filter Plate type filter: Nylon, aluminum or nonwoven fabric;

Bag type filter: Nonwoven fabric; Cartridge type filter: Superfine fiberglass;

Humidifier Wet film humidifier, high pressure spray humidifier, dry steam humidifier, electric steam humidifier

Sound attenuator Multiple depths: 600mm, 900mm, 1200mm Heat recovery Heat wheels or plate heat exchangers Heating Heating coils or electric heaters Flow equalization Galvanized steel sheet Damper Galvanized steel, aluminum steel, Access door Inward opening , outward opening, with window or not Light Standard or ultraviolet light Humidity sensor Temperature sensor Automatic damper, damper actuator Pressure difference switch, pressure switch Start-up cabinet, frequency conversion cabinet

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5. Typical structure

1 Access Door 2 Cooling Coil 3 Heating Coil 4 Motor

5 Leaving Air Panel

Components 6 Bag Filter 7 Attenuator 8 Damper

9 Fan 10 Section Sealing

Components 11 Angle Steel Joint 12 Partition Plate

13 Coil Fasten Components

14 Plate Filter 15Strengthen

Column 16 Light

Base frame Unit sections are mounted on galvanized steel or channel steel base frame for ease of shipment and handling. The frames provide holes for section connection, and holes for fork-lift truck. There is a guard rail cross the bottom in the holes to prevent unit damage by trucks. The base frame can be used in lieu of concrete plinths or other additional bases that are used on site. However, for high static pressure application, additional concrete plinths or other additional bases are required at site to raise the MAHU for drain pan’s U-trap.

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Double skin panel The outer skin is color-coated steel sheet that is resistant to scratch and nicks and shall allow for easy cleaning. The inner skin is galvanized steel sheet. The panels are 50mm thick double skin type with injected polyurethane foam insulation. The panel insulation shall not absorb moisture and is rot resistant. The insulation material shall be totally enclosed in the panel to avoid any possibility of insulation being exposed to air stream. The panel insulation shall have a thermal conductivity value of 0.03W/m2K. The panel is sturdy and, in its standard design, unit sections of the same width can be stacked on the top of one another, without the need of additional reinforcement.

Drain pan Cooling coil and humidifier are installed on reversed U-shaped support plates. A U-shaped channel is pressed in the middle of drain pan to promote proper condensate removal. The galvanized drain pan is coated to inhibit the growth of algae and fungi. 10mm insulation is provided between the drain pan and the bottom panel. Stainless steel drain pan is optional.

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Access door

Access section, fan section, humidifier section and heat-exchanged coil sections shall be equipped with access doors. The access doors are equipped with locking handle which is controllable internally and externally. A durable seal is around the full perimeter of the door’s frame to prevent air leakage. Lights in unit are interlocked with doors. Light is fixed above access door, and shall be equipped with a weather-resistant plastic switch box.

Motor mounting Motor mounting base frame is consisted of 2 slide rails and a basement with long through-holes. Motor can be moved freely in the plane to reach the correct point then fasten bolts. Installation and maintenance of motors are time saving jobs.

Vibration protector The fan motors are mounted on a rigid base frame which is supported by effective

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spring shock absorber. Rigid protecting components are equipped at the base frame to protect fans, motors and spring shock absorber during transportation.

6. Mechanical specifications

Fan assembly The vibration levels of the complete fan assembly (fan wheel, motor and drives assembled as a whole system) shall be checked and dynamically balanced in the factory.

Forward fan Backward fan Fans are mainly consisted of scroll, impeller, frame, bearing and shaft. The scroll is made of hot galvanized steel sheet. Its side plate has an outline complying with aerodynamics. The impeller is made of high grade hot galvanizing steel sheet and is designed to a special configuration according to aerodynamics to make the efficiency highest and the noise lowest. The high quality ball bearings are air-sealed, with preset lubricating oil, and of automatically alignment. The shafts are made of 40 Cr or C45 carbon steel bars. They are coated after assembly in order to provide corrosion

Protector

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resistance. The fans are AMCA certified. Fan connection shall be isolated from unit casing by a flexible canvas duct mounted at fan discharge outlet. Fan and motor assembly shall be internally isolated from the unit casing with spring isolators, furnished and installed by the unit manufacturer. The drive assembly shall consist of belt pulley and motor. The belt type shall be SPZ or SPA grades, oil and heat resistant, antistatic and avoiding electric discharges. Motor shall be mounted on a sliding base to permit adjustment of drive belt tension. Standard motor shall be horizontal foot mounting, induction motor, totally enclosed fan-cooled with IP55 protection. Unit shall be provided with a painted metal sheet belt guard. The belt guard shall be rigidly attached to the fan base support structure. Fan assembly section shall be equipped with an access door with window on the drive side of the fan.

Coil Coils are consisted of copper-tubes and aluminum fins. The fins are sine-wave design with slits for better heat transfer efficiency and moisture carry-over limit performance. All coils are installed with space between each component for cleaning and mounting of controls. All cooling coils are mounted over a drain pan. The cooling coil rests on U-shape supporters which are located over the drain pan. The drain pan extends beyond the leaving side of the coil to help recover condensate. Coil connections always extend through out of the unit cabinet, allowing for the easy connection of valves and piping. Vents are located outside the cabinet.

Filter Filter section is consisted of galvanized steel filter frame structure and an access door for filter maintenance. Primary efficiency plate filter is designed as standard. Bag, cartridge and other high efficiency filters may be optioned. The structure of filters are stable and firm, high strength and intensity, and easy changing. Filter shall be loaded from both left and right sides. Front loaded may be optioned. The filters efficiency may up to 95%.

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Plate type filter Bag type filter

Humidifier Wet film vaporization humidifier is a type of enthalpy humidifier or evaporation gasification humidifier. Through the principle of exchange of heat and moisture, the air is humidified and cooled. The medium is inorganic material which is high-life, high reliability, clean, good heat conduction and bacteria resistance.

7. Quick selection

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Quick selection procedures Step 1: Determine the airflow (m3/h) or total cooling capacity (kW). Step 2: Use the table below to determine the unit size by picking the closest airflow or total cooling capacity. Step 3: The unit width and height are the same for all sections. For the unit length, use Table B. Standard section length to determine the overall unit length. Step 4: Determine the nominal unit details (unit weight, cooling coil water pressure drop, water flow and motor input power) using Table A.

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Table A: Quick Select

Model

Air flow

Cooling capacity

Residual pressure

Unit dimension Unit weight

Cooling coil water pressure

drop

Water flow

Motor input Width Height

m3/h kW Pa mm mm kg kPa L/s kW

MKZ03 3000 13.5 200 900 930 390 13.1 0.65 1.1

MKZ05 5000 25 220 1150 930 470 16.2 1.21 3

MKZ08 8000 44 310 1400 1130 590 30.7 2.13 3

MKZ10 10000 55 310 1600 1130 630 41.1 2.66 4

MKZ12 12000 72 330 1800 1130 720 27.1 3.48 4

MKZ15 15000 88 350 1800 1330 790 27.2 4.25 5.5

MKZ18 18000 102 380 2100 1330 920 33.7 4.93 7.5

MKZ20 20000 118 410 2100 1430 1078 35.2 5.70 11

MKZ25 25000 152 410 2400 1580 1295 37.5 7.35 11

MKZ30 30000 180 420 2400 1880 1536 49.9 8.70 11

MKZ35 35000 208 460 2500 2080 1800 24.5 10.05 18.5

MKZ40 40000 235 510 2500 2280 2050 24 11.36 18.5

MKZ45 45000 260 510 2500 2530 2450 23.6 12.57 30

Note: 1、Standard cooling condition: entering air DB temp. is 27 , WB temp. is 19.5 ; ℃ ℃ entering water

temp. is 7 , leaving water temp. is 12 .℃ ℃ 2、Standard heating condition: entering air DB temp. is 7 , entering water temp. is 60 , leaving ℃ ℃

water temp. is 50 .℃ 3、Coil is copper-tube and aluminum fin type, the water velocity is 0.8-1.8m/s.

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Table B: Unit Length

Model L1 L2 L3

mm mm mm

MKZ03Y4/C 1625 1125 1000

MKZ05Y4/C 1625 1125 1000

MKZ08Y4/C 1625 1025 1000

MKZ10Y4/C 1625 1025 1000

MKZ12Y4/C 1625 1125 1000

MKZ15Y4/C 1625 1125 1000

MKZ18Y4/C 1625 1125 1000

MKZ20Y4/C 1625 1225 1000

MKZ25Y4/C 1625 1225 1000

MKZ30Y4/C 1625 1400 1000

MKZ35Y4/C 1625 1525 1000

MKZ40Y4/C 1625 1525 1000

MKZ45Y4/C 1625 1525 1000

Note: L1, length of cooling coil section; L2, length of fan section; L3, length of humidifier section.

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8. Section Data

Component sketches

Name Sketch Name Sketch

Mixing chamber

Entering chamber

Plate filter

Bag filter

Cartridge filter

Water cooling coil

Water heating coil

Electric heating coil

Wet film humidifier

Steam humidifier

Attenuator

Eliminators

Access door

Fan

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Fan discharge arrangement Horizontal air supply

Model Horizontal

Length Width Height

MKZ03Y4/C 750 900 600

MKZ05Y4/C 780 1025 690

MKZ08Y4/C 920 1200 830

MKZ10Y4/C 990 1320 900

MKZ12Y4/C 1050 1490 985

MKZ15Y4/C 1060 1650 1080

MKZ18Y4/C 1060 1650 1080

MKZ20Y4/C 1160 1750 1230

MKZ25Y4/C 1260 1920 1340

MKZ30Y4/C 1360 2160 1490

MKZ35Y4/C 1360 2160 1490

MKZ40Y4/C 1450 2290 1680

MKZ45Y4/C 1450 2290 1680

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Vertical air supply

Model Vertical

Length Width Height

MKZ03Y4/C 730 900 630

MKZ05Y4/C 830 1025 710

MKZ08Y4/C 980 1200 810

MKZ10Y4/C 1000 1320 870

MKZ12Y4/C 1080 1490 940

MKZ15Y4/C 1140 1650 1020

MKZ18Y4/C 1140 1650 1020

MKZ20Y4/C 1250 1750 1130

MKZ25Y4/C 1320 1920 1220

MKZ30Y4/C 1460 2160 1370

MKZ35Y4/C 1460 2160 1370

MKZ40Y4/C 1630 2290 1510

MKZ45Y4/C 1630 2290 1510

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Water pipe connection of cooling coil

(mm)

Model Water pipe

A B C

D

E

MKZ03Y4/C DN40 160 115 447 - -

MKZ05Y4/C DN40 160 115 447 - -

MKZ08Y4/C DN50 155 120 650 - -

MKZ10Y4/C DN50 160 120 650 - -

MKZ12Y4/C DN65 160 115 650 - -

MKZ15Y4/C DN65 155 120 855 - -

MKZ18Y4/C DN65 160 115 850 - -

MKZ20Y4/C DN65 160 125 957 - -

MKZ25Y4/C DN65 160 125 1090 - -

MKZ30Y4/C DN65 160 125 576 233 576

MKZ35Y4/C DN65 160 125 640 231 640

MKZ40Y4/C DN65 160 125 766 440 766

MKZ45Y4/C DN65 160 125 893 232 893

Note: MKZ03-25Y4/C units have one cooling coil heat exchanger, while MKZ30-45Y4/C units have two. One cooling coil has one drain pan. The condensate in the upper drain pan is discharged to the lower one through a plastic water pipe.

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9. Typical combination The simplest combination This combination is applicable in residential comfort places. It is structure simple, space-saving and investment less.

The most economical combination This combination including mixing and primary filter function. It is applicable in resident comfort and energy saving places.

Industrial combination 1 Heat and moisture can be handled in this combination. It is applicable in places where are more comfort needed and there are higher requirements on temperature and humidity.

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Industry combination 2 Heat and moisture can be handled in this combination. It is applicable in places where are more comfort needed and there are higher requirements on temperature and humidity. The wet film humidifier here has a function as an eliminator.

The manufacturer has a policy of continuous product improvement, and

reserves the right to alter any details of the products at any time without

notice.