– 31 –
1 Cover the coupling with insulator and then wrap it with tape.
If neglected, moisture formed on the piping will drip out.
2 Finishing and fixing
a Tie up the piping with wrapping tape, and shape it so that it conforms
to which the pipe is attached.
b Fix them with clamps as right figure.
Vinyl tape
Position so that the slit area face upward.
Cover the exterior portion with cov-
ering tape and shape the piping so it
will match the contours of the route
that the piping to take. Also fix the
wiring and pipings to the wall with
clamps.
Insulation
Refrigerant piping
Electrical wiring
Covering tape
Drain hose
Tapping screw
(three-way valve)
Charge hose (Designed specifically for R22)
Compound pressure gauge
Pressure gauge
Gauge manifold
(Designed specifically for R22
Check joint
-0.1MPa
(-76cmHg)
Handle Lo
Operation valve
Operation valve
(two-way valve)
Operation valve
cap
Operation valve
cap
Operation valve cap
tightening torque (N•m)
Check joint blind nut
tightening torque (N•m)
ø6.35 (1/4")
ø9.52 (3/8")
10~12
ø12.7 (1/2") 25~35
ø15.88 (5/8") 30~40
20~30
Operation valve size
(mm)
Securely tighten the operation valve cap and the check joint blind nut after adjustment.
¡Use an anti-reverse flow type vacuum pump adapter so as to prevent vacuum pump oil from running back into the system.
Oil running back into an air-conditioning system may cause the refrigerant cycle to break down.
Additional refrigerant
Less than 7m : Not required
More than 7m :25g/m
How to relocate or dispose the unit
• In order to protect the environment, be sure to pump down (recovery of
refrigerant).
• Pump down is the method of recovering refrigerant from the indoor unit
to the outdoor unit when the pipes are removed from the unit.
<How to pump down>
1 Connect charge hose to check joint.
2 Liquid side : Close the liquid valve with hexagon wrench key.
Gas side : Fully open the gas valve.
Carry out cooling operation. (If indoor temperature is low, operate
forced cooling operation.)
3 After low pressure gauge become 0.01MPa, stop cooling operation and
close the gas valve.
¡Forced cooling operation
Turn off the unit for a while. And then turn it on
again by pressing continuously the ON/OFF button
for 5 seconds or more.
Insulation of the connection portion
z Additional refrigerant charge
Air purge
1 Tighten all flare nuts in the pipings both
indoor and outside wall so as not to
cause leak.
2 Connect service valve, charge hose,
manifold valve and vacuum pump as is
illustrated below.
3 Open manifold valve handle Lo to its
full width, and perform vacuum or
evacuation.
Continue the vacuum or evacuation op-
eration for 15 minutes or more and
check to see that the vacuum gauge
reads – 0.1 MPa (– 76 cmHg).
4 After completing vacuum operation,
fully open service valve (Both gas and
liquid sides) with hexagon headed
wrench.
5 Fully open service valve (Both gas and
liguid sides) with hexagon headed
wrench.
6 Detach the charge hoses.
7 Check for possible leakage of gas in the
connection parts of both indoor and out-
door.
Unit ON/OFF button
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