Connecting The Refrigerant Piping; About Connecting The Refrigerant Piping; Precautions When Connecting The Refrigerant Piping - Daikin FDXM35F3V1B Installer's Reference Manual

6 Installation
1~1.5 m
a Hanging bar
O Allowed
X Not allowed
▪ Condensation. Take measures against condensation. Insulate
the complete drain piping in the building.
To connect the drain piping to the indoor unit
NOTICE
Incorrect connection of the drain hose might cause leaks,
and damage the installation space and surroundings.
1 Push the drain hose as far as possible over the drain pipe
connection.
2 Tighten the metal clamp until the screw head is less than 4 mm
from the metal clamp part.
3 Check for water leaks (see
page 12).
4 Install the insulation piece (drain pipe).
5 Wind the large sealing pad (= insulation) around the metal
clamp and drain hose, and fix it with cable ties.
6 Connect the drain piping to the drain hose.
1 2~6
a b e
4
1
A-A'
a Drain pipe connection (attached to the unit)
b Drain hose (accessory)
c Metal clamp (accessory)
d Large sealing pad (accessory)
e Insulation piece (drain pipe) (accessory)
f Drain piping (field supply)
NOTICE
▪ Do NOT remove the drain pipe plug. Water might leak
out.
▪ Use the drain outlet only to discharge the water if the
drain pump is not used or before maintenance.
▪ Insert and remove the drain plug gently. Excessive
force may deform the drain socket of the drain pan.
Pull out the plug.
▪ Do NOT wiggle the plug up and down.
a
Push in the plug.
Installer reference guide
12
a
"To check for water leaks" on
c d
2 5
A
A
A'
A'
≤4 mm
d
c
3
b
a
▪ Set the plug and push it in using a Phillips screwdriver.
a Drain plug
b Phillips screwdriver
To check for water leaks
Gradually pour approximately 1 l of water in the drain pan, and
check for water leaks.
a
b
c
a Air outlet
b Portable pump
c Bucket
d Refrigerant pipes
e Drain outlet
f 6.3

Connecting the refrigerant piping

6
6.3.1

About connecting the refrigerant piping

Before connecting the refrigerant piping
Make sure the outdoor and indoor unit are mounted.
Typical workflow
Connecting the refrigerant piping involves:
▪ Connecting the refrigerant piping to the outdoor unit
▪ Connecting the refrigerant piping to the indoor unit
▪ Insulating the refrigerant piping
▪ Keeping in mind the guidelines for:
▪ Pipe bending
▪ Flaring pipe ends
▪ Brazing
▪ Using the stop valves
6.3.2 Precautions when connecting the
refrigerant piping
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
DANGER: RISK OF BURNING
CAUTION
▪ Do NOT use mineral oil on flared part.
▪ NEVER install a drier to this unit to guarantee its
lifetime. The drying material may dissolve and damage
the system.
a
b
d e
FDXM25~60F3V1B(9)
Split system air conditioners
4P550955-1 – 2018.07