3
An item preceded by a box
is a check item. After examining the item, check it
5
.
2. Handling
When handling an outdoor unit, carry it to the installation location in its original packing, if possible.
(1)
Before Installation
This unit uses HFC refrigerant (R410A) that does not damage the ozone layer.
1) As the pressure of new refrigerant R410A is 1.4 times higher than ordinary refrigerants, it is more easily affected by water,
oxides, grease, and other impurities. As new refrigeration oil Ze-GLES RB74 is also used, make sure that no water,
impurity, non-R410A refrigerant, and non-Ze-GLES RB74 refrigeration oil enter the system.
2) To prevent mixing R410A refrigerant and Ze-GLES RB74 refrigeration oil with other refrigerants and refrigeration oil,
both the connector and cap nut for filling of the R410A refrigerant and Ze-GLES RB74 refrigeration oil are different from
that of other refrigerants and refrigeration oil. Make sure to use specific tools for filling the R410A refrigerant and
Ze-GLES RB74 refrigeration oil.
{
: For both new and old types of refrigerants
: Exclusive for R410A (R22 not supported)
z
: Exclusive for R407C(R22
not supported)
Gauges and Tools
Interchangeability
with R22
Causes and Precautions for Non-interchangeability
(new refrigerants only)
(
◎
: must follow items)
Application
R407C
R410A
Refriger
ant Piping
Copper pipe cutter
{
{
Pipe cutting and deburring
Pipe expander
{
{
y
Expand the flare of pipes to support the pressure
resistance of R410A. Expand the pipe with a 1mm
pipe expander pad when using existing pipes.
(The pipe flare expander for R410A can also be used
for R407C refrigerant piping).
For expanding the flare of
refrigerant pipes.
Expander Spacer
─
(N/A)
For processing the flare mouth.
Pipe bender
{
{
For bending the refrigerant pipe.
Pipe expanding
machine
{
{
For expanding the refrigerant
pipe.
Torque wrench
{
y
2mm larger than the
Φ
12.7 or
Φ
15.88 wrenches for
use on R410A pipes. Not suitable for use on the
pipes of currently used refrigerants.
For locking cap nuts.
{
y
Φ
6.35 and
Φ
9.53 wrenches can also be used.
Welder
{
{
y
Weld pipes as instructed (flame adjustment, welding
temperature, and choice of welding materials).
For welding refrigerant pipes.
Nitrogen
{
{
y
Strictly prevent dust from entry.
(Following the nitrogen use instructions)
For preventing oxidation and the
air-tightness test
Pipe flare coating
z
y
JX Nippon Oil & Energy Corporation synthetic oil:
Ze-GLES RB74
。
y
Do not use mineral oil for R22, use only synthetic oil
of the equivalent level.
y
Synthetic oil has high moisture absorbency. Do not
store synthetic oil in a humid place.
For coating and repairing pipe
flares.
Vacuum Dry
an
d Refrig
eran
t Filing
Refrigerant
cylinder
z
(brown)
(pink)
y
Refrigerant cylinders are identified by color
(cylinders for different types of refrigerants are in
different colors)
(R410A: Pink)
(R407C: Brown)
◎
(Do not use gas refrigerants)
non-azeotrope
refrigerants. Use liquid refrigerants only.
For filling refrigerants
Vacuum pump
{
{
◎
Current vacuum pumps can be used. To prevent
pump stop, oil inside will flow back to the
refrigerant pipe. Install a “ball valve” on the pump
For vacuum drying.
Ball valve
(prevent reflux)
※
z
Manifold gauge
set
z
y
Compared to R22 refrigerant, new refrigerants have
higher pressure and thus are not interchangeable.
R410A fitting spec: 1/2 UNF
R407C fitting spec: 7/16 UNF
◎
“Do not use fittings for R22 refrigerant”. The
mineral oil on the fittings may contaminate new
refrigerants and clog the circulation system to cause
compressor failure.
For confirming vacuum status
and refrigerant filling pressure.
Filling hose
z
Filling bottle
Prohibited
For filling refrigerants
Refrigerant filling
scale
{
{
For measuring refrigerant filling
level.
Refrigerant leak
detector
※
z
y
The leakage testing methods of new and old (R22)
refrigerants are different.
For testing refrigerant leakage.
※
: Interchangeable for R410A and R407C refrigerants.
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