Midea MEU-18MPH2, MEU-24MPH2, MEU-36MPT2, MEU-48MPT2, MEHSU-12CHD2 Installation 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

1

2

5

3

4

6

 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

7

8

9

10

LN

 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

1

1

1

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 .

1

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.)

1

1

Orifice (some models)

1

Φ0.5in-Φ0.63in

Φ0.25in-Φ0.375in

Φ0.375in-Φ0.5in

1
(on some models)

1
(on some models)

1
(on some models)

1(on some models)

1(on some models)

1

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

1. 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.

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

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

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

5.

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

LN

1

2

3

4

5

MC MC

6

7

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.

1.

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

228/8.9

280/11

Size of mounted lug

I

920/36.2782/30.8

1140/44.91001/39.4

1400/55.11261/49.6

1240/48.81101/43.3

J

G

H

508/20

598/23.5

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.

2. 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.

3.

Install hanging screw bolts.

4.

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.

5.

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.

6. Secure the bolt using the washers and nuts
provided.

7. Install the four suspension bolts.

8. 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