Mitsubishi Electric Fresh Master GUF-50RDH4 Installation Instructions Manual page 13

7.3. Request for application of insula-
tion to the connectors of the field
refrigerant pipe
Check if the parts listed below are included in the package before
installation.
Flare insulation
Pipe insulation
Insulating
material
2 pieces
2 pieces
Locally Procured Materials
(Refrigerant pipe, Tape for piping installation)
After the refrigerant pipe connection is complete,
be sure to apply insulation to the connector (flare
connection) using the attached insulated pipe as
shown in the figure below.
- Make sure not to leave a gap between the insulated pipe and
the indoor unit as well as the insulated pipe and the field
refrigerant piping.
- Faulty insulation application may cause condensation to form
resulting in water leakage.
1. Insert the flare nut in the field refrigerant piping, pull the insulating
material when performing flare pipe expansion, and put the
insulating material back so that the copper pipe is not exposed.
* Condensation may occur.
I n s u l a t i n g
material
Pull
Put it back
Flare nut
2. Wrap the insulating material around the flare connection and the
field refrigerant piping (no gap should exist) and temporarily fix
using the tape for piping construction. (It will be clipped by the
insulating pipes described in the step 3 to fix.)
Insulating
material
Field refrigerant
piping
Tie band
4 pieces
Insulating
material
Flare nut
* No gap should exist
* No gap should exist on
the refrigerant piping body
(Condensation may occur)
3. Wrap the insulated pipe around the flare area and fix the
each insulating pipe with a tie band.
* Be sure to perform construction so as not to leave a gap on
the insulated pipe joint area. (Condensation may occur in
the flared area.)
Insulated
Insulating material
pipe
can stick out from
the insulated pipe
Field refrigerant
piping
* No gap should exist
on the unit body
Joint is the upper
Insulated pipe
side (Target: Within
the range of 30°
right or left from the
right above)
* No gap
should exist
(Condensation
may occur)
Tie band
4. Wrap the tape for piping construction around the joint between
the insulated pipe and the field refrigerant piping to prevent the
insulated joint from being exposed.
Field refrigerant
piping
(Locally prepared)
Tape wrapped area
Body side
panel
Unit body
* No gap should exist
(Condensation may
occur)
[Good [Bad
example] example]
Unit (mm)
Unit body
11