Installation Site Requirements Of The Indoor Unit; Preparing Refrigerant Piping; Refrigerant Piping Requirements - Daikin FDXM25F3V1B Installer's Reference Manual

5 Preparation
WARNING
Do NOT install the air conditioner at any place where
flammable gas may leak out. If the gas leaks out and stays
around the air conditioner, a fire may break out.
5.2.1 Installation site requirements of the
indoor unit
INFORMATION
Also read the following requirements:
▪ General installation
"General safety precautions" chapter.
▪ Refrigerant piping
difference). See further in this "Preparation" chapter.
INFORMATION
The sound pressure level is less than 70 dBA.
NOTICE
The equipment described in this manual may cause
electronic noise generated from radio-frequency energy.
The equipment complies to specifications that are
designed to provide reasonable protection against such
interference. However, there is no guarantee that
interference will not occur in a particular installation.
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc.
Install power cables at least 1 metre away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
1 metre may not be sufficient.
▪ Fluorescent lights. When installing a wireless user interface in a
room with fluorescent lights, mind the following to avoid
interference:
▪ Install the wireless user interface as close as possible to the
indoor unit.
▪ Install the indoor unit as far as possible from the fluorescent
lights.
▪ Signal receiver with built-in temperature sensor must be
installed on a location:
▪ near the intake vent (when installation near the intake vent is
not possible, install 1.5 m above the floor)
▪ which is not exposed to cold or hot air.
▪ where signal may not be blocked by curtain, etc.
▪ Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
▪ Choose a location where the hot/cold air discharged from the unit
or the operation noise, will NOT disturb anyone.
WARNING
Do NOT place objects below the indoor and/or outdoor unit
that may get wet. In this condition, condensation on the
main unit or refrigerant pipes, air filter dirt or drain blockage
may cause dripping. This results in fouling or failure of the
object which is located beneath the unit.
▪ Air flow. Make sure nothing blocks the air flow.
▪ Drainage. Make sure condensation water can be evacuated
properly.
▪ Ceiling insulation. When conditions in the ceiling exceed 30°C
and a relative humidity of 80%, or when fresh air is inducted into
the ceiling, then additional insulation is required (minimum 10 mm
thickness, polyethylene foam).
Installer reference guide
8
site requirements. See the
requirements (length, height
▪ Protective guards. Make sure to install protective guards on the
suction and discharge side to prevent somebody from touching
the fan blades or heat exchanger.
Do NOT install the unit in the following places:
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
It is NOT recommended to install the unit in the following places
because it may shorten the life of the unit:
▪ Where the voltage fluctuates a lot
▪ In vehicles or vessels
▪ Where acidic or alkaline vapour is present
▪ Use suspension bolts for installation.
▪ Spacing. Mind the following requirements:
≥20
c
A Minimum distance to the floor:
2.7 m to avoid accidental touching.
2.5 m in case the fan is covered (e.g. false ceiling, grille,
...)
a Control box
b Maintenance space
c Ceiling
d Floor surface
e Select the dimension to ensure downward slope of at least
1/100
5.3

Preparing refrigerant piping

5.3.1

Refrigerant piping requirements

INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
Refrigerant piping material
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping temper grade and thickness:
Outer diameter Temper grade
(Ø)
6.4 mm (1/4") Annealed (O)
9.5 mm (3/8")
12.7 mm (1/2")
(a) Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
Refrigerant piping diameter
Use the same diameters as the connections on the outdoor units:
a
≥300
b
≥400
d
(mm)
(a)
Thickness (t)
Ø
≥0.8 mm
FDXM25~60F3V1B
Split system air conditioners
4P482333-1 – 2017.03
t