Midea MEU-18MPH2 User manual

MIDDLE STATIC PRESSURE DUCT TYPE AIR CONDITIONER

Installation Manual

Middle Static Pressure Duct Type

IMPORTANT NOTE:

Read this manual carefully before

installing or operating your new air

conditioning unit. Make sure to save

this manual for future reference.

MEU-18MPH2

MEU-24MPH2

MEU-36MPT2

MEU-48MPT2

Accessories....................................................04

a. Indoor Unit Parts

........................................ 07

b. Indoor Unit Installation Instructions

.......08

Safety Precautions .....................................05

Outdoor Unit Installation......................... 12

a. Outdoor Unit Installation Instructions

......12

b. Outdoor Unit Types and Speciﬁcations....13

c. Notes on Drilling Hole in Wall

....................14

Drainpipe Installation............................... 15

Table of Contents

Installation Manual

Indoor Unit Installation ...........................07

Installation Overview ...............................06

Page 3 

Refrigerant Piping Connection.......................17

A. Notes on Pipe Length and Elevation..............17

B. Refrigerant Piping Connection Instructions

...18

Wiring................................................. 20

a. Outdoor Unit Wiring.................. 20

b. Indoor Unit Wiring

..................... 21

c. Power Speciﬁcations

................... 23

Air Evacuation..................................................25

a. Evacuation Instructions

................................ 25

b. Note on Adding Refrigerant

....................... 26

Test Run.............................................27

MC MC

Page 4 

Accessories 1

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.

Connecting wire for display (2m)

Cord protection rubber ring

QUANTITY

SHAPE

NAME

Soundproof / insulation sheath 2

Tubing & Fittings

Others

Installation manual

Transfer connector(Φ12.7-Φ15.9)/

( )(Packed with the indoor unit )

NOTE: Pipe size may differ from appliance to

appliance. To meet different pipe size requirements,

sometimes the pipe connections need a transfer

connector installed on the outdoor unit .

Transfer connector(Φ6.35-Φ9.52)/

( )(Packed with the indoor unit)

NOTE: Pipe size may differ from appliance to

appliance. To meet different pipe size requirements,

sometimes the pipe connections need a transfer

connector installed on the outdoor unit .

Transfer connector(Φ9.52-Φ12.7)/

( ) (Packed with the indoor unit,

used for multi-type models only )

NOTE: Pipe size may differ from appliance to

appliance. To meet different pipe size requirements,

sometimes the pipe connections need a transfer

connector installed on the outdoor unit .

Owner‘s manual

Drain joint (some models)

Seal ring (some models)

Drainpipe Fittings

(for cooling & heating)

Seal sponge (some models)

EMC Magnetic Ring

(some models)

Magnetic ring

(wrap the electric wires S1 & S2 ( P & Q & E )

around the magnetic ring twice)

Magnetic ring

(Hitch on the connective cable between the indoor

unit and outdoor unit after installation.)

Orifice (some models) 1

Φ0.5in-Φ0.63in

Φ0.25in-Φ0.375in

Φ0.375in-Φ0.5in

(on some models)

1(on some models)

Optional accessories

There are two types of remote controls: wired and wireless.

Select a remote controller based on customer preferences and requirements and install in an

appropriate place.

Refer to catalogues and technical literature for guidance on selecting a suitable remote controller.

•

S1&S2(P&Q&E)

Page 5 

Safety Precautions 2

Read Safety Precautions Before Installation

Incorrect installation due to ignoring instructions can cause serious damage or injury.

The seriousness of potential damage or injuries is classiﬁed as either a WARNING or CAUTION.

WARNING

• Carefully read the Safety Precautions before installation.

• In certain functional environments, such as kitchens, server rooms, etc., the use of specially

designed air-conditioning units is highly recommended.

• Only trained and certified technicians should install, repair and service this air

conditioning unit.

Improper installation may result in electrical shock, short circuit, leaks, ﬁre or other damage to

the equipment and personal property.

• Strictly follow the installation instructions set forth in this manual.

Improper installation may result in electrical shock, short circuit, leaks, ﬁre or other damage to

the equipment.

• Before you install the unit, consider strong winds, typhoons and earthquakes that might affect

your unit and locate it accordingly. Failure to do so could cause the equipment to fail.

• After installation, ensure there are no refrigerant leaks and that the unit is operating properly.

Refrigerant is both toxic and ﬂammable and poses a serious health and safety risk.

Note about Fluorinated Gasses

This air-conditioning unit contains ﬂuorinated gasses. For speciﬁc information on the type of gas

and the amount, please refer to the relevant label on the unit itself.

Installation, service, maintenance and repair of this unit must be performed by a certiﬁed

technician.

Product uninstallation and recycling must be performed by a certiﬁed technician.

If the system has a leak-detection system installed, it must be checked for leaks at least every 12

months.

When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.

Failure to observe a caution may result in injury or equipment damage.

WARNING

CAUTION

Failure to observe a warning may result in death. The product must be installed by

installers or contractors who are licenced HVAC professionals and in compliance

with all local and state and provincial laws.

Page 6 

Installation Overview 3

Unit Installation

Overview

123

MC MC

Install the indoor unit

(Page 7)

INSTALLATION ORDER

Install the outdoor unit

(Page 13)

Install the drainpipe

(Page 15)

Evacuate the refrigeration system

(Page 25)

Connect the wires

(Page 20)

Connect the refrigerant pipes

(Page 17)

Perform a test run

(Page 27)

Page 7 

Indoor Unit Installation 4

Indoor Unit

Installation

Indoor Unit Parts

Fig. 4.1

WARNING

• Securely install the indoor unit on a structure

that can sustain its weight. If the structure is

too weak, the unit may fall causing personal

injury, unit and property damage, or even

death

• DO NOT install the indoor unit in a bathroom

or laundry room as excessive moisture can

short the unit and corrode the wiring.

CAUTION

• Install the indoor and outdoor units, cables

and wires at least 1m (3.2’) from televisions

or radios to prevent static or image

distortion. Depending on the appliances, a

1m (3.2’) distance may not be sufﬁcient.

• If the indoor unit is installed on a metal

part of the building, it must be grounded.

Indoor Unit Installation Instructions

Step 1: Select installation location

The indoor unit should be installed in a location

that meets the following requirements:



Enough room for installation and maintenance.

Enough room for the connecting pipe and

drainpipe.

The ceiling is horizontal and its structure can

sustain the weight of the indoor unit.

The air inlet and outlet are not impeded.

The airﬂow can ﬁll the entire room.

There is no direct radiation from heaters.

CAUTION

DO NOT install the unit in the following

locations:

Where oil drilling or fracking is taking place.

Coastal areas with high salt content in the air

Near geothermal activity and corrosive gas

Buildings that may experience power

fluctuations

Enclosed spaces

Areas with strong electromagnetic waves

Areas that store flammable materials or gas

Rooms with high humidity, such as

bathrooms or laundry rooms

Fig. 4.2

Air outlet

Air inlet

Air filter(on selected models)

Drain hose

Electric control cabinet

Refrigerant connecting pipe

checking orifice

60cmX60cm (23.6inX23.6in)

30cm (11.8inch) or more

20cm (7.9inch) or more

Maintenance Clearance

√

Safety Precautions

Page 8 

Indoor Unit

Installation

Fig. 4.3

Step 2: Hang indoor unit.

Please refer to the following diagrams to locate the four positioning screw bolt holes on the

ceiling. Be sure to mark the paces where you will drill ceiling hook holes.

Air outlet dimensions

Air inlet dimensions

Air filter

Descending ventilation opening and mounted hook

Air filter

Electric control box

Table.4-1 (unit: mm/inch)

MODEL

(Btu/h)

Outline dimension

ABC

18K 210/8.3 674/26.5880/34.6

24K 249/9.8 774/30.51100/43.3

30K~36K 249/9.8 774/30.51360/53.5

36K~60K 300/11.8 874/34.41200/47.2

air outlet opening size

DEF

136/5.4 706/27.8600/23.6

175/6.9 926/36.5700/27.6

175/6.9 1186/46.7700/27.6

227/8.9 1044/41.1800/31.5

air return opening size

190/7.5

228/8.9

280/11

Size of mounted lug

920/36.2782/30.8

1140/44.91001/39.4

1400/55.11261/49.6

1240/48.81101/43.3

508/20

598/23.5

697/27.4

Page 9 

Indoor Unit

Installation

Cut off the roof beam.

Strengthen the point at which the cut

was made. Consolidate the roof beam.

Fig. 4.6

Fig. 4.7

Original concrete bricks

Use an embedding screw bolt, crock, and stick

harness.(See Fig.4.6)

Steel Roof beam structure

Install and use the supporting steel angle.

(See Fig.4.7)

Fig. 4.4

Wood

Place the wood mounting across the roof beam,

then install the hanging screw bolts.(See Fig.4.4)

Wood mounting

Roof beam

Hanging screw bolts

Ceiling

Fig. 4.5

New concrete bricks

Inlay or embed the screw bolts. (See Fig. 4.5)

(Blade shape insertion) (Slide insertion)

Steel bar

Embedding screw bolt

(Pipe hanging and embedding screw bolt)

Hanging screw bolt

Hanging

bolts

Supporting

steel angle

Fig. 4.9

Screw nut

Washer

Hanging screw bolt

Overhang part

Shockproof cushion

NOTE:

Confirm the minimum drain tilt is 1/100

or more.

CAUTION

The unit body must be completely aligned with

the hole. Ensure that the unit and the hole are

the same size before moving on.

Install and fit pipes and wires after you have

finished installing the main body.When

choosing where to start, determine the

direction of the pipes to be drawn out.

Especially in cases where there is a ceiling

involved, align the refrigerant pipes, drain

pipes, and indoor and outdoor lines with their

connection points before mounting the unit.

Install hanging screw bolts.

After you select an installation location,align

the refrigerant pipes, drain pipes, as well as

indoor and outdoor wires with their

connection points before mounting the unit.

Drill 4 holes 10cm (4”) deep at the ceiling

hook positions in the internal ceiling. Be sure

to hold the drill at a 90° angle to the ceiling.

Secure the bolt using the washers and nuts

provided.

Install the four suspension bolts.

Mount the indoor unit with at least two

people to lift and secure it. Insert suspension

bolts into the unit’s hanging holes. Fasten

them using the washers and nuts provided.

(See Fig. 4.8).

9. Mount the indoor unit onto the hanging

screw bolts with a block. Position the

indoor unit flat using a level indicator to

prevent leaks. (See Fig. 4.9).

Fig. 4.8

Page 10 

Indoor Unit

Installation

Fig. 4.10

Step 3: Duct and accessories installation

NOTE: 1. Do not place the connecting duct

weight on the indoor unit.

2. When connecting the duct, use an

nonflammable canvas tie-in to prevent

vibrating.

3. Insulation foam must be wrapped outside the

duct to avoid condensate. An internal duct

underlayer can be added to reduce noise,

if the end-user requires.

1. Install the filter (optional) according to the size

of the air inlet.

5. Refer to the following static pressure guidelines

when installing the indoor unit.

Change the fan motor static pressure

according to external duct static pressure.

2. Install the canvas tie-in between the body and

the duct.

3. The air inlet and air outlet duct should be far

enough apart enough to a avoid air passage

short-circuit.

4. Connect the duct according to the following

diagram:

Canvas tie-in Canvas tie-in

Air outlet

Isolation booth

checking orifice

Air inlet

Air dust filter

Table.4-2

MODEL

(Btu/h)

Static Pressure

(Pa / inAq)

0~100 (0-0.40)

18K

0~160 (0-0.64)

24K

30K~36K

42K~60K

0~160 (0-0.64)

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