INVENTOR U4MRS-18 User manual

• 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
1
2
5
3
4
6
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
7
8
9
10
11
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)
1
Refrigeration
Fittings
Insulation for gas pipe
fitting (some models)
Insulation for liquid pipe
fitting (some models)
1
Drainpipe
Fittings
Outlet pipe sheath (some
models)
1
Outlet pipe clasp (some
models)
1
Drain joint (some models)
1
Seal ring (some models)
1
Installation
Accessory (some
models)
Ceiling hook
4
Suspension bolt 4
Throttle (some units) 1
Anti-shock rubber 1
1
1
Owner’s manual
Installation manual
1
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
4
5
MC MC
6
78
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”
>1m / 39”
>1m / 39”
>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”)
L
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.
W
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