Daikin FTXF20A2V1B - Preparing Refrigerant Piping; Refrigerant Piping Requirements

5 | Preparation
Installer reference guide
20
FTXP50~71M2V1B + FTXF20~71A2V1B + ATXF50~71A2V1B
Daikin room air conditioner
4P513661-8H – 2019.12
▪ 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.
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
▪ 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.
▪ In places where the unit would be in the path of direct sunlight.
▪ In bathrooms.
▪ Sound sensitive areas (e.g. near a bedroom), so that the operation noise will
cause no trouble.
WARNING
Do NOT place objects below the indoor and/or outdoor unit that may get wet.
Otherwise condensation on the unit or refrigerant pipes, air filter dirt or drain
blockage may cause dripping, and objects under the unit may get dirty or damaged.
▪ Spacing. Install the unit at least 1.8 m from the floor and keep the following
requirements in mind for distances from the walls and the ceiling:
≥50 ≥50
≥30
(mm)
5.3 Preparing refrigerant piping
5.3.1 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the "General safety precautions"
chapter.
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant.
▪ Foreign materials inside pipes (including oils for fabrication) must be
≤30mg/10m.
Refrigerant piping diameter
Use the same diameters as the connections on the outdoor units: