Vacuum
pump
3
Gauge manifold
Vacuum pump
Outlet
Inlet
Liquid
Valve
Product name
Gauge
manifold
Charge
hose
Leak
detector
Flaring oil
New
tools
Yes
Yes
Yes
Yes
Yes
R22 tools
compatible
with R407C
No
No
Yes
No
No
Remarks
Types of refrigerant and refrigerating machine oil, and pressure
gauge are different.
To resist pressure and oil, material has been changed.
Use a conventional vacuum pump if it is equipped with a check
valve. If it has no check valve, purchase and attach a vacuum
pump adaptor.
Leak detector for CFC an HCFC which react to chlorine do not
function because R407C contains no chlorine. Leak detector for
R407C can be used for HFC134a.
Mineral oil (for example, suniso oil) can be used as R22 oil. Use
synthetic fluid (for example, ether oil) as R407C oil.
* Using both R22 tools and new tools together can cause defects.
3-2. Use a R407C exclusive cylinder only.
Single-outlet valve
(with siphon tube).
Liquid refrigerant can be
refilled standing it up
straight.
New refrigerant R407C cannot be used for existing models.
1. Compressor specs are different.
When refilling the R22 compressor with R407C, durability will significantly decrease since some
of the materials used for compressor parts are different.
2. Existing piping cannot be used.
Completely cleaning out residual refrigerating machine oil is impossible, even by flushing.
3. Refrigerating machine oil differs.
Since R22 refrigerating machine oil is mineral oil, it does not dissolve in R407C. Therefore,
refrigerating machine oil discharged from the compressor can cause compressor damage.
R22 refrigerating machine oil
Mineral oil (suniso oil)
R407C refrigerating machine oil
Synthetic fluid (ether oil)
R 407 C
1. GENERAL
This booklet briefly outlines where and how to install the air
conditioning system. Please read over the entire set of
instructions for the indoor and outdoor units and make sure all
accessory parts listed are with the system before beginning.
1-1. Tools Required for Installation (not
supplied)
1.
Standard screwdriver
2.
Philips head screwdriver
3.
Knife or wire stripper
4.
Tape measure
5.
Level
6.
Sabre saw or key hole saw
7.
Hacksaw
8.
Core bits
9.
Hammer
10.
Drill
11.
Tube cutter
12.
Tube flaring tool
13.
Torque wrench
14.
Adjustable wrench
15.
Reamer (for deburring)
1-2. Type of Copper Tube and Insulation
Material
To purchase these material from a local source, you will need:
1. Deoxidised annealed copper tube for refrigerant tubing.
2. Foamed polyethylene insulation for copper tubes as
required to precise length of tubing. Wall thickness of the
insulation should be not less than 8 mm.
3. Use insulated copper wire for field wiring. Wire size varies
with the total length of wiring. Refer to Section 5. “Electrical
Wiring” for details.
EG
