English
9
•
To avoid the influence of noise from the power supply line on the transmission wiring and the remote
controller wiring, these wirings must be kept as far as possible from the power/ground wirings. As shown in the
figure, keep the power supply wiring and the ground wiring together. Keep the transmission and remote con-
troller wirings together and route them maintaining a good distance from the power supply/ground wirings
(that is, on the other side of the power supply/ground wirings). Then, fix them securely on the refrigerant pipe.
•
Seal the piping through-hole with putty corking material.
(9) Push on both bottom edges of the indoor unit using both hands and hook the tab on the back of
the indoor unit onto the installation panel (1). (Refer to Fig. 9)
•
At this time remove the buffering material placed in step (6).
•
Make sure power supply wiring, transmission wiring, ground wiring and remote controller wiring are not
caught inside the indoor unit.
■
When screwing in the indoor unit
•
Remove the front grill.
(Refer to Fig. 7)
•
Secure the indoor unit to the installation panel (1) with the securing
screws (6).
(Refer to Fig. 11)
5. REFRIGERANT PIPING WORK
〈
For refrigerant piping of outdoor units, see the installation manual attached to the outdoor unit.
〉
〈
Execute heat insulation work completely on both sides of the gas piping and the liquid piping.
Otherwise, a water leakage can result sometimes.
〉
(
When using a heat pump, the temperature of the gas piping can reach up to approximately 120°C, so use
insulation which is sufficiently resistant.)
〈
Also, in cases where the temperature and humidity of the refrigerant piping sections might exceed
30°C or RH80 %, reinforce the refrigerant insulation. (20 mm or thicker) Condensation may form on the
surface of the insulating material.
〉
〈
Before refrigerant piping work, check which type of refrigerant is used. Proper operation is not pos-
sible if the types of refrigerant are not the same.
〉
CAUTION
• Use a pipe cutter and flare suitable for the type of refrigerant.
• Apply ester oil or ether oil around the flare section before connecting.
• To prevent dust, moisture or other foreign matter from infiltrating the tube, either pinch the end
or cover it with tape.
• Do not allow anything other than the designated refrigerant to get mixed into the refrigerant
circuit, such as air, etc. If any refrigerant gas leaks while working on the unit, ventilate the room
thoroughly right away.
• Do not mix air or other gas with the specified refrigerant in the refrigeration cycle.
• Ventilate the room if refrigerant gas leaks during the work.
•
The outdoor unit is charged with refrigerant.
•
Use copper alloy seamless pipes (ISO 1337)
Installation panel
(accessory) (1)
Refrigerant piping
Insulating tape
(accessory) (4)
M4 × 12L
(accessory) (6)
Fig. 11
01_EN_3P156215-12U.fm Page 9 Thursday, August 27, 2009 4:09 PM
