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Fig. 7
Indoor unit
(Fitting)
After hooking the indoor unit to the top hook, hook the
fittings of the indoor unit to the two bottom hooks while
lowering the unit and pushing it against the wall.
[Installing the indoor unit]
• Hang the indoor unit from the hooks at the top of the
wall hook bracket.
• Insert the spacer, etc. between the indoor unit and the
wall hook bracket and separate the bottom of the
indoor unit from the wall.
Fig. 8
Indoor unit
Wall hook bracket
Fig. 9
Insert the drain cap and drain
hose until it butts against the
drain port.
After removing the drain hose, do not forget to
install the drain cap.
NOTE:
• To prevent breaking of the pipe, avoid sharp bends. Bend
the pipe with a radius of curvature of 4" (100 mm) or more.
• If the pipe is bent repeatedly at the same place, it will break.
• Do not remove the flare nut from the indoor unit pipe until
immediately before connecting the connection pipe.
Top hooks
Wall hook
bracket
Bottom hooks
Spacer
Drain cap
Indoor unit
drain hose
3. RECEIVER TANK (Reverse cycle model
only) : 4-ROOM MULTI type
The "Receiver tank" is not used for cooling models.
(When only 1 or 2 indoor units are connected)
A "Receiver tank" is necessary when all indoor units (the
max. of 4 units) are not being installed. When
connecting only 1 indoor unit to unit A (A1, A2) or unit B
(B1, B2), place a "Receiver tank" between the "2-way
valve" and "Connection pipe". Use a 400 to 600 cc
capacity "Receiver tank".
Fig. 10
OUTDOOR UNIT
2-way velve
4. AIR PURGE
(1) Purge the air inside the indoor unit and the piping to
a pressure of 1.5 mmHg abs or less from the
charging valve using a vacuum pump.
(2) After purging the air inside the indoor unit and the
piping, remove the cap of the two valves.
(3) Open the spindle of the two valves from the closed
state.
(4) Tighten the cap of the two valves to the specified
torque.
Spindle
Cap
(5) Flare nut tightening torque
Flare nut tightening torque
1/4" (06.35mm)
3/8" (09.53mm)
1/2" (12.70mm)
Fig. 11
OUTDOOR
UNIT
Service hose
– 20 –
Receiver tank
Connection pipe
Tightening torque kg
•
2-way valve
3-way valve
70 to 90
100 to 120
200 to 250
150~200 kgf
cm
•
310~350 kgf
cm
•
500~550 kgf
cm
•
Gauge
H i
manifold
Vacuum pump
cm
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