En-7
5.5. Additional charging
WARNING
When moving and installing the air conditioner, do not mix gas other than the specified
refrigerant R410A inside the refrigerant cycle.
If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to
an abnormally high value and cause breakage, injury, etc.
CAUTION
After vacuuming the system, add refrigerant.
Do not reuse recovered refrigerant.
When charging the refrigerant R410A, always use an electronic scales for refrigerant
charging (to measure the refrigerant by weight). Adding more refrigerant than the
specified amount will cause a malfunction.
When charging the refrigerant, take into account the slight change in the composition
of the gas and liquid phases, and always charge from the liquid phase side whose
composition is stable. Adding refrigerant through the gas pipe will cause a malfunction.
Check if the steel cylinder has a siphon installed or not before filling. (There is an
indication “with siphon for filling liquid” on the steel cylinder.)
Filling method for cylinder with siphon
R410A
Gas
Liquid
Set the cylinder vertical and fill with the liquid.
(Liquid can be filled without turning bottom up with the siphon
inside.)
Filling method for other cylinders
R410A
Gas
Liquid
Turn bottom up and fill with liquid.
(Be careful to avoid turning over the cylinder.)
Be sure to use the special tools for R410A for pressure resistance and to avoid mixing
of impure substances.
If the units are further apart than the maximum pipe length, correct operation can not
be guaranteed.
Make sure to back closing valve after refrigerant charging. Otherwise, the compressor
may fail.
Minimize refrigerant release to the air. Excessive release is prohibited under the Freon
Collection and Destruction Law.
5.5.1. For Pre-charge length
Piping length (L) *Pre-Charge [m]
20
5.5.2. If additional refrigerant is required
When the piping is longer than Pre-charge length, additional charging is necessary.
•
For the additional amount, see the table below.
•
Additional charging amount
Refrigerant pipe size
[mm (in.)]
Piping length (L)*
~20 m
30 m
40 m
50 m
g/m
Liquid
9.52 (3/8)
None
400 g
800 g
1,200 g
40 g/m
Gas
15.88 (5/8)
sd*
*
* Refer to “4.3. Refrigerant pipe size and allowable piping length”.
6. ELECTRICAL WIRING
Cable
Cable size [mm²]
Type
Remarks
Power Supply Cable
3.5
Type60245 IEC66
3 Cable + Ground
1 Φ 230 V
Connection Cable
1.5
Type60245 IEC57
3 Cable + Ground
1 Φ 230 V
Max. Cable Length : Limit voltage drop to less than 2%. Increase cable if voltage drop is
2% or more.
6.1. Notes for electrical wiring
WARNING
Wiring connections must be performed by a qualified person in accordance with
the specifications. The voltage rating for this product is 230 V at 50 Hz. It should be
operated within the range of 198 to 264 V.
Before connecting the wires, make sure the power supply is OFF.
Never touch electrical components immediately after the power supply has been
turned off. Electrical shock may occur. After turning off the power, always wait
5 minutes or more before touching electrical components.
Use a dedicated power supply circuit. Insufficient power capacity in the electrical circuit
or improper wiring may cause electric shock or fire.
Be sure to install a breaker of the specified capacity.
When selecting breaker, please comply with the laws and the regulations of each
country. One breaker must be installed on the power supply of the outdoor unit.
Wrong selection and setup of the breaker will cause electric shock or fire.
When selecting breaker, please comply with the laws and the regulations of each country.
One breaker must be installed on the power supply of the outdoor unit.
Wrong selection and setup of the breaker will cause electric shock or fire.
Be sure to install an earth leakage breaker.
Otherwise, it will cause electric shock or fire.
A circuit breaker is installed in the permanent wiring. Always use a circuit that can trip
all the poles of the wiring and has an isolation distance of at least 3 mm between the
contacts of each pole.
Use designated cables and power cables. Improper use may cause electric shock or
fire by poor connection, insufficient insulation, or over current.
Do not modify power cable, use extension cable or branch wiring. Improper use may
cause electric shock or fire by poor connection, insufficient insulation or over current.
Connect the connector cable securely to the terminal. Check no mechanical force bears
on the cables connected to the terminals. Faulty installation can cause a fire.
Use crimp-type terminals and tighten the terminal screws to the specified torques,
otherwise, abnormal overheating may be produced and possibly cause serious
damage inside the unit.
Make sure to secure the insulation portion of the connector cable with the cable
clamp. Damaged insulation can cause a short circuit.
Fix cables so that cables do not make contact with the pipes (especially on high
pressure side). Do not make power supply cable and transmission cable come in
contact with valves (Gas).
Do not connect the AC power supply to the transmission line terminal board. Improper
wiring can damage the entire system.
Never install a power factor improvement condenser. Instead of improving the power
factor, the condenser may overheat.
Be sure to perform the grounding work.
Do not connect grounding wires to a gas pipe, water pipe, lightning rod or grounding
wire for a telephone.
Connection to a gas pipe may cause a fire or explosion if gas leaks.
•
Connection to a water pipe is not an effective grounding method if PVC pipe is used.
•
Connection to the grounding wire of a telephone or to a lightning rod may cause a
•
dangerously abnormal rise in the electrical potential if lightning strikes.
Improper grounding work can cause electric shocks.
•
Securely install the electrical box cover on the unit. An improperly installed service
panel can cause serious accidents such as electric shock or fire through exposure to
dust or water.
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