To Install The Drain Pan Kit; Connecting The Refrigerant Piping; Pipe Bending Guidelines; To Flare The Pipe End - Daikin ERLQ004CA Installer's Reference Manual

7.3.2 To install the drain pan kit

If a drain pan kit (EKHBDPCA2) is required, install it before
connecting the refrigerant and water pipes and the electrical wiring.
To install, see the installation manual of the drain pan kit.
7.4

Connecting the refrigerant piping

DANGER: RISK OF BURNING
CAUTION
Do NOT use mineral oil on flared part.
Do NOT reuse piping from previous installations.
NEVER install a drier to this R410A unit to guarantee
its lifetime. The drying material may dissolve and
damage the system.
NOTICE
Take the following precautions on refrigerant piping into
account:
Avoid anything but the designated refrigerant to get
mixed into the refrigerant cycle (e.g. air).
Only use R410A when adding refrigerant.
Only use installation tools (e.g. manifold gauge set)
that are exclusively used for R410A installations to
withstand the pressure and to prevent foreign
materials (e.g. mineral oils and moisture) from mixing
into the system.
Install the piping so that the flare is NOT subjected to
mechanical stress
Use caution when passing copper tubes through walls.
Protect the piping as described in the following table to
prevent dirt, liquid or dust from entering the piping.
Unit Installation period
Outdoor unit >1 month
<1 month
Indoor unit Regardless of the
period
INFORMATION
Do NOT open the refrigerant stop valve before checking
the refrigerant piping. When you need to charge additional
refrigerant it is recommended to open the refrigerant stop
valve after charging.
Take the following guidelines into account when connecting pipes:
Coat the flare inner surface with ether oil or ester oil when
connecting a flare nut. Tighten 3 or 4 turns by hand, before
tightening firmly.
Always use two wrenches together when loosening a flare nut.
EHBH04+08 + ERLQ004~008

Daikin Altherma - Low Temperature Split

4P313774-1 – 2012.05
a
d

7.4.1 Pipe bending guidelines

Use a pipe bender for bending. All pipe bends should be as gentle as
possible (bending radius should be 30~40 mm or larger).

7.4.2 To flare the pipe end

1
2
Protection method
Pinch the pipe
a
Pinch or tape the pipe
3
4
A
Always use a spanner and torque wrench together to tighten the
flare nut when connecting the piping. This to prevent nut
cracking and leaks.
b
c
a Torque wrench
b Spanner
c Piping union
d Flare nut
Piping size Tightening
(mm) torque (N•m)
Ø6.4 15~17
Ø15.9 63~75
CAUTION
Incomplete flaring may cause refrigerant gas leakage.
Do NOT re-use flares. Use new flares to prevent for
refrigerant gas leakage.
Use flare nuts that are included with the unit. Using
different flare nuts may cause to refrigerant gas
leakage.
Cut the pipe end with a pipe cutter.
Remove burrs with the cut surface lacing downward so that the
chips does not enter the pipe.
b
a Cut exactly at right angles.
b Remove burrs.
Remove the flare nut from the stop valve and put the flare nut on
the pipe.
Flare the pipe. Set exactly at the position as shown in the
following illustration.
A
Flare tool for
R410A (clutch Clutch type
type) (Ridgid-type)
0~0.5 mm 1.0~1.5 mm
7 Installation
Flare
dimensions Flare shape
(mm) (mm)
8.7~9.1
90° ±2
19.3~19.7
A
R=0.4~0.8
Conventional flare tool
Wing nut type
(Imperial-type)
1.5~2.0 mm
Installer reference guide
30