Installation Manual

11
1 Liquid pipe
2 Gas pipe
3 Insulation for liquid pipe fitting
4 Insulation for gas pipe fitting
5 Clamps
(use 2 clamps per insulation)
6 Indoor unit
For local insulation, be sure to insulate local piping
all the way into the pipe connections inside the unit.
Exposed piping may cause condensation or may
cause burns when touched.
Make sure that no oil remains on plastic parts of the
decoration panel (optional equipment).
Oil may cause degradation and damage to plastic
parts.
3) Finally, insulate as shown in the figure below.
1 Piping insulation material(field supply)
2 Flare nut connection
3 Insulation for fitting (field supply)
4 Piping insulation material (main unit)
5 Indoor unit
6 Clamp (field supply)
A Turn seams up
B Attach to base
C Tighten the part other than the piping insulation material
Piping insulation procedure
Gas piping Liquid piping
1
3
5
2
4
1
1
6
6
6
6
4
4
5
5
3
3
2
2
A
A
C
C
B
B
3.5 Additional refrigerant charge
CAUTION
Refrigerant may only be charged after performing the leak
test and the vacuum pumping.
Check the type of refrigerant to be used on the machine
nameplate. Charging with an unsuitable refrigerant may
cause explosions and accidents, so always ensure that the
appropriate refrigerant is charged.
Refrigerant containers shall be opened slowly.
The outdoor unit is factory charged with refrigerant. Calculate the
added refrigerant according to the diameter and the length of the
liquid pipe of the outdoor unit/indoor unit connection.
3.6 Refrigerant pipig work
1) Caution on the pipe handling
Protect the open end of the pipe against dust and moisture.
All pipe bends should be as gentle as possible. Use a pipe
bender for bending.
2) Be sure to insulate both the gas and liquid piping. Use
separate thermal insulation pipes for gas and liquid
refrigerant pipes. See the figure below.
Be sure to add the proper amount of additional refrigerant.
Failure to do so may result in reduced performance.
Pipe length Up to 49.2ft / 15m More than 49.2ft / 15m
Not less than 15minNot less than 10 minRun time
*2. If the compound pressure gauge pointer swings back,
refrigerant may have water content or a loose pipe joint may
exists. Check all pipe joints and retighten nuts as needed,
then repeat steps 2) through 4).
Be sure to
place a cap.
If no flare cap is
available, cover the
flare mouth with
tape to keep dirt or
water out.
Inter-unit wire
Liquid pipe
Liquid pipe
insulation
Drain hose
Finishing tape
Gas pipe
insulation
Gas pipe
Wall
Rain
6
Pipe length and refrigerant amount:
Connective
pipe length
Less
than 24.6ft
More
than 24.6ft
Air purging
method
Use vacuum
pump.
Use vacuum
pump.
Additional amount of refrigerant to be charged
R410A: (Pipe length-7.5(25))x15g/m(0.16oz/ft)
Liquid side: 1/4in / 6.35mm
R410A: (Pipe length-7.5(25))x30g/m(0.32oz/ft)
Liquid side: 3/8in / 9.52mm
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