Refrigerant Piping - Toshiba MMK-UP0151HP-E Installation Manual

9

REFRIGERANT PIPING

Refrigerant Piping
Use copper pipe with 0.8 mm or more
thickness. (In case pipe size is dia. 15.9,
with 1.0 mm or more.)
from those of the conventional refrigerant.
unit of the air conditioner, and use it.
REQUIREMENT
When the refrigerant pipe is long, provide
support brackets at intervals of 2.5 to 3 m to
clamp the refrigerant pipe. Otherwise, abnormal
sound may be generated.
IMPORTANT 4 POINTS FOR PIPING WORK
1. Remove dust and moisture from the inside
of the connecting pipes.
2. Tight connection (between pipes and unit)
3. Evacuate the air in the connecting pipes
using VACUUM PUMP.
4. Check the gas leakage. (Connected points)
Pipe size
Gas side
Liquid side
19-EN
CAUTION
(dia.: mm)
P015 to
P024 type
P018 type
12.7 15.9
6.4 9.5
Permissible Piping Length and
Height Difference
They vary according to the outdoor unit.
For details, refer to the Installation Manual attached
to the outdoor unit.
Flaring
Cut the pipe with a pipe cutter.
Remove burrs completely.
Remaining burrs may cause gas leakage.
Insert a flare nut into the pipe, and flare the pipe.
As the flaring sizes of R410A differ from those of
refrigerant R22, the flare tools newly
manufactured for R410A are recommended.
However, the
conventional tools can
be used by adjusting
projection margin of the
copper pipe.
Projection margin in flaring: B (Unit: mm)
R R (Clutch type)
R410A tool used
Outer dia. of
copper pipe
6.4 , 9.5
12.7 , 15.9
Flaring dia. meter size: A (Unit: mm)
Outer dia. of copper pipe
6 4 .
9 5 .
1 2 7 .
1 5 9 .
* In case of flaring for R410A with the
conventional flare tool, pull it out
approx. 0.5 mm more than that for
R22 to adjust to the specified flare
size. The copper pipe gauge is
useful for adjusting projection margin
size.
19
Installation Manual
Conventional
tool used
R410A R410A
0 to 0.5 1.0 to 1.5
A 0
+
-0.4
R410A
9 1 .
1 3 2 .
1 6 6 .
1 9 7 .
A
B