en
9
Service port
Open/Close section
Local pipe
Sealed, same way for gas side
Pipe cover
Do not use a wrench here.
Refrigerant leakage may result.
Use two wrenches here.
(1) Connect the testing tools.
• Make sure the stop valves are closed and do not open them.
• Add pressure to the refrigerant lines through the service port of the liquid
stop valve .
(2)
little.
Pressurize to 0.5 MPa (5 kgf/cm
2
-
sure does not decrease.
Pressurize to 1.5 MPa (15 kgf/cm
2
pressure does not decrease.
Pressurize to 4.15 MPa (41.5 kgf/cm
2
G) and measure the surrounding tem-
perature and refrigerant pressure.
(3)
have passed the test and there are no leaks.
• If the surrounding temperature changes by 1 °C, the pressure will change by
about 0.01 MPa (0.1 kgf/cm
2
G). Make the necessary corrections.
(4) If the pressure decreases in steps (2) or (3), there is a gas leak. Look for the
source of the gas leak.
The stop valve opening method varies according to the outdoor unit model. Use the
appropriate method to open the stop valves.
(1) Gas side (Fig.4-6)
Remove the cap, pull the handle toward you and rotate 1/4 turn in a counterclock-
wise direction to open.
Make sure that the stop valve is open completely, push in the handle and rotate
the cap back to its original position.
(2) Liquid side (Fig.4-7)
Remove the cap and turn the valve rod counterclockwise as far as it will go with
the use of a 4 mm hexagonal wrench. Stop turning when it hits the stopper.
(ø9.52: Approximately 10 revolutions)
Make sure that the stop valve is open completely, push in the handle and rotate
the cap back to its original position.
Refrigerant pipes are protectively wrapped
• The pipes can be protectively wrapped up to a diameter of ø90 before or after
connecting the pipes. Cut out the knockout in the pipe cover following the groove
and wrap the pipes.
Pipe inlet gap
• Use putty or sealant to seal the pipe inlet around the pipes so that no gaps remain.
(If the gaps are not closed, noise may be emitted or water and dust will enter the
unit and breakdown may result.)
• Additional charging is not necessary if the pipe length does not exceed 30 m.
• If the pipe length exceeds 30 m, charge the unit with additional R32 refrigerant
according to the permitted pipe lengths in the chart below.
* When the unit is stopped, charge the unit with the additional refrigerant through
the liquid stop valve after the pipe extensions and indoor unit have been vacu-
umized.
When the unit is operating, add refrigerant to the gas check valve using a
safety charger. Do not add liquid refrigerant directly to the check valve.
* After charging the unit with refrigerant, note the added refrigerant amount on
the service label (attached to the unit).
Refer to the “1.5. Using R32 refrigerant air conditioners” for more information.
• Be careful when installing multiple units. Connecting to an incorrect indoor unit
can lead to abnormally high pressure and have a serious effect on operation
performance.
ensure that there is no risk of explosion from electrical sparks it must be ensured
that the equipment machine is 100% disconnected from the mains supply.
Double spanner section
(Do not apply a spanner other than to this section.
Doing so would cause coolant leaks.)
Seal section
(Seal the end of the heat insulation material at the
pipe connection section with whatever seal mate-
-
trate the heat insulation material.)
Valve
Unit side
Handle
Cap
Local pipe side
Pipe cover
Service port
Wrench hole
Do not tighten the service port too much when installing it, otherwise, the valve core
could be deformed and become loose, causing a gas leak.
After positioning section in the desired direction, turn section only and tighten it.
Do not further tighten sections and together after tightening section .
The stop valve shape, service port posi-
tion, etc., may vary according to the model.
* Turn section only.
(Do not further tighten sections and
together.)
Charge hose
Service port
(1)
(2)
Warning:
the compressor.
Outdoor unit
A+B+C+D
Maximum
amount of
refrigerant
Amount of additional refrigerant charge (kg)
30 m and less
31 - 40 m
41 - 50 m
51 - 60 m
61 - 70 m
71 - 100 m
ZM200
No additional
charge necessary
0.4 kg
0.8 kg
1.2 kg
1.6 kg
Calculate the amount of additional refrigerant
charge using formula provided next page
9.2 kg
ZM250
0.6 kg
1.2 kg
1.8 kg
2.4 kg
9.2 kg
M200
0.4 kg
0.8 kg
1.2 kg
1.6 kg
–
7.2 kg
M250
0.6 kg
1.2 kg
1.8 kg
2.4 kg
9.2 kg
