INVENTOR U4MRS-18 Bedienungsanleitung

• INSTALLATION MANUAL

• ΕΓΧΕΙΡΙΔΙΟ ΕΓΚΑΤΑΣΤΑΣΗΣ

• MANUAL DE INSTALARE

ENGLISH | ΕΛΛΗΝΙΚΑ | ROMANA

CASSETTE TYPE

MODELS:

V4MCRI-12/U4MRS-12

V4MCRI-18/U4MRS-18

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

a. Indoor Unit Parts.............................................. 07

b. Indoor Unit Installation Instructions.................. 08

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

Outdoor Unit Installation......................... 11

a. Outdoor Unit Installation Instructions ................. 11

b. Drain Joint Installation ....................................... 12

c. Notes on Drilling Hole in Wall.............................12

Drainpipe Installation............................... 13

Table of Contents

Installation Manual

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

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

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

Page 3 

Refrigerant Piping Connection...............15

A. Notes on Pipe Length and Elevation..................15

B. Refrigerant Piping Connection Instructions........16

C. Installation Of The Throttle ...............................18

Wiring................................................. 19

b. Outdoor Unit Wiring..........................19

c. Indoor Unit Wiring .............................20

a. Power Speciﬁcations

...........................19

Air Evacuation.......................................... 21

a. Evacuation Instructions................................. 21

b. Note on Adding Refrigerant......................... 22

Panel Installation..........................23

Test Run.............................................25

MC MC

L N

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 cause the

equipment to fail.

Name Shape Quantity

Indoor unit

installation

Installation paper template

(some models)

Refrigeration

Fittings

Insulation for gas pipe

fitting (some models)

Insulation for liquid pipe

fitting (some models)

Drainpipe

Fittings

Outlet pipe sheath (some

models)

Outlet pipe clasp (some

models)

Drain joint (some models)

Seal ring (some models)

Installation

Accessory (some

models)

Ceiling hook

Suspension bolt 4

Throttle (some units) 1

Anti-shock rubber 1

Owner’s manual

Installation manual

Optional accessories

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

Select a remote controller according to customers request and install in an appropriate place.

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

This indoor unit requires installation of an optional decoration panel.

•

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 warning may result in death. The appliance must be installed in accordance with

national regulations.

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

WARNING

CAUTION

Page 6 

Installation Overview 3

Unit Installation

Overview

L N

123

MC MC

Install the indoor unit

(Page 7)

INSTALLATION ORDER

Install the outdoor unit

(Page 11)

Install the drainpipe

(Page 13)

Evacuate the refrigeration system

(Page 21)

Connect the wires

(Page 19)

Connect the refrigerant pipes

(Page 15)

Install the front panel

(Page 23)

Perform a test run

(Page 25)

Page 7 

Indoor Unit Installation 4

Indoor Unit Parts

(within indoor unit)

Drain pipe

Drain pump

Air outlet

Air inlet

Display panel

Front grille

Louver

Refrigerant pipe

Fig. 4.1

Safety Precautions

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 death.

•Install the indoor unit at a height of more than

2.5m (8’) above the ﬂoor.

• DO NOT install the indoor unit in the 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 electrically grounded.

Indoor Unit

Installation

Page 8 

Indoor Unit Installation Instructions

NOTE: Panel installation should be done after piping

and wiring.

Step 1: Select installation location

The indoor unit should be installed in a location that

meets the following requirements:

The unit is at least 1m (39”) from the nearest wall.

There is enough room for installation and

maintenance.

There is 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:

In areas with oil drilling or fracking

In coastal areas with high salt content in the air

In areas with caustic gases in the air, such as near

hot springs

In areas with power ﬂuctuations, such as factories

In enclosed spaces, such as cabinets

In kitchens that use natural gas

In areas with strong electromagnetic waves

In areas that store ﬂammable materials or gas

In rooms with high humidity, such as bathrooms or

laundry rooms

RECOMMENDED DISTANCES BETWEEN THE INDOOR UNIT AND THE CEILING

The distance between the mounted indoor unit and the internal ceiling should meet the following speciﬁcations.

(See Fig. 4.2)

Connecting point

of drain pipe

Connecting point of

refrigerant pipe

(liquid side)

Connecting point of

refrigerant pipe

(gas side)

Front panel

Ground

Ceiling board

>2.5m / 8.2’

60cm / 23.6” (Ceiling hole)

Ceiling

Fig. 4.2

Indoor Unit

Installation

>29cm / 11.4”

26cm / 10.2”

Page 9 

CAUTION

The unit body should align perfectly with the hole.

Ensure that the unit and the hole are the same size

before moving on.

2. Drill 4 holes 5cm (2”) deep at the ceiling hook positions

in the internal ceiling. Be sure to hold the drill at a 90°

angle to the ceiling.

3. Using a hammer, insert the ceiling hooks into the

pre-drilled holes. Secure the bolt using the included

washers and nuts.

4. Install the four suspension bolts (See Fig. 4.4).

Step 2: Hang indoor unit.

1. Use the included paper template to cut a rectangular hole in the ceiling, leaving at least 1m (39”) on all sides. The

hole will be 60x60cm (23.6x23.6”) big. Be sure to mark the areas where ceiling hook holes will be drilled.

Fig. 4.4

Fig. 4.3

Indoor Unit

Installation

545mm / 21.5” (Suspension bolt)

570mm / 22.4”(Body)

647mm / 25.5”(Ceiling opening)

523mm / 20.6”

(Suspension bolt)

570mm / 22.4” (Body)

647mm / 25.5” (Ceiling opening)

Refrigerant piping side

Drain hose side

>1m / 39”

Page 10 

5. Mount the indoor unit. You will need two people to

lift andsecure it. Insert suspension bolts into the unit’s

hanging holes. Fasten them using the included washers

and nuts (See Fig. 4.5).

Fig. 4.5

NOTE: The bottom of the unit should be 24mm (0.9”)

higher than the ceiling board. Generally, L

(indicated in Fig. 4.6) should be half the length of the

suspension bolt or long enough to prevent the nuts from

coming off.

Fig. 4.6

CAUTION

Ensure that the unit is completely level. Improper

installation can cause the drain pipe to back up into the

unit or water leakage.

Indoor Unit

Installation

Wall

Ceiling board

Main body

24mm (0.9”)

NOTE: Ensure that the indoor unit is level. The unit is

equipped with a built-in drain pump and float switch.

If the unit is tilted against the direction of condensate

flows (the drainpipe side is raised), the float switch may

malfunction and cause water to leak.

ater level

Fig. 4.7

NOTE FOR NEW HOME INSTALLATION

When installing the unit in a new home, the ceiling

hooks can be embedded in advance. Make sure that the

hooks do not come loose due to concrete shrinkage.

After installing the indoor unit, fasten the installation

paper template onto the unit with bolts (M6X12) to

determine in advance the dimension and position of the

opening on the ceiling. Follow the instructions above for

the remainder of the installation.

Installation template

M6 x 12 Bolts

Main body

Fig. 4.8

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