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4.14 Schematic Diagram Of Connection
Between Indoor Unit And Outdoor Unit
4.15 Refrigerant Leak Precautions
This air conditioner uses refrigerant R410A. The R410A is safe
refrigerant which is harmless and non-flammable. The room for
placing the air conditioner should have a proper space. Even if
refrigerant leakage occurs, the density threshold will not be
crossed. Additional measures may also be taken.
Density threshold: Density of the Freon gas that does not harm
the human body. Density threshold of R410A: 0.44 [ kg/m
Calculate the total quantity of refrigerant to be replenished (A
[kg]). Total refrigerant quantity for 10HP = refrigerant replenish-
ment quantity upon shipment + additional refrigerant replenish-
ment corresponding to the pipe length.
Calculate out the indoor volume (B[m
minimum volume)
Calculate out the refrigerant density:
A[kg]
≤
Density threshold: 0.44 [kg/m ]
3
B[m ]
Measures against crossing of the refrigerant density threshold
In order to keep the refrigerant density below the threshold
value, please install a mechanic ventilation device. (perform
ventilation often)
In case frequent ventilation is impossible, please install the
leakage detection alarm device linked with the mechanical
ventilation device.
Outdoor unit
Room in which refrigerant is leaked
8
Signal wire
Gas-side connective pipe
of system
Liquid-side connective pipe
of system
Fig.4-14
3
]) (according to the
3
(All refrigerant is leaked)
Fig.4-15
b. Leakage detection alarm device linked
with the mechanical ventilation device
OA
(The leakage detection alarm device should be installed at the place
vulnerable to retention of the refrigerant)
5. ELECTRIC CONNECTION
3
]
Use special power supply for the air conditioner. Design power
supplies specific to the indoor unit and outdoor unit. The supply
voltage must comply with the nominal voltage.
The external supply circuit of the air conditioner must have a
ground wire, and the power supply ground wire of the indoor unit
must be connected with the external ground wire firmly.
The wiring must be performed by professional technicians
according to the circuit diagram labels.
Distribute the wires according to the relevant electric technical
standards promulgated by the State, and set the Residual
Current-operated Circuit Breaker (RCCB) properly.
The power wire and the signal wire shall be laid out neatly and
properly, without mutual interference or contacting the connec-
tion pipe or valve.
No power cable is attached to this equipment. The user can
select the power cable by reference to the stipulated power
supply specifications. No joint of wires is allowed.
Upon completion of wire connection, double check it and then
connect the power supply.
An all-pole disconnection device which has at least 3mm
separation distance in all pole and a residual current
device(RCD)with the rating of above 10mA shall be incorporated
in the fixed wiring according to the national rule.
The appliance shall be installed in accordance with national
wiring regulations.
Indoor unit
a. Ventilation orifice part
CAUTION
Fig.4-16
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