27
PMML0205A rev.4 - 11/2012
ENGLISH
2. Mount the piping cover in order to avoid water entering into
the unit. Seal the holes where pipes and wires are inserted,
by using a insulation (eld-supplied).
3. If the eld-supplied piping is connected with stop valves
directly, it is recommended use a tube bender.
4. Check to ensure that the stop valves are closed completely
before connecting pipes.
5. Connect the eld supplied refrigerant pipes to the indoor unit
and outdoor unit. Apply the oil thinly at the seat are nut and
pipe before tightening.
The required tightening torque is as follows:
Pipe Size Tightening Torque (Nm)
Ø 6.35 mm 20
Ø 9.53 mm 40
Ø 12.70 mm 60
Ø 15.88 mm 80
6. After connecting the refrigerant piping, seal the open space
between knockout hole and refrigerant pipes by using
insulation material.
Unit
Side
Nº Description
Insulation Material
Insulation Material
Field Supplied
Insulation Material
7. Operation of stop valve should be performed according to the
gure below.
Close before shipment
Nº Description Remaks
Cap
Allen wrench Hex 4 mm
Refrigerant Piping Field Supplied
Cap
Refrigerant Pressure To Outdoor Unit
Seat Surface Fully closed position
Check Joint Only the charging those can be connected
Cap
O-Ring Rubber
Spindle valve
Open – Counterclockwise
Close – Clockwise
Tighten torque (N.m)
Valve type / Model A B C D
Liquid Valve: 3~6HP 7~9 34~42 34~42 14~18
Gas Valve: 3~6HP 9~11 34~42 68~82 14~18
¡ Outdoor unit stop valve
Do not apply two
spanners at this
position. If applied,
leakage will occur.
Stop valve
Flare nut
CAUTION:
At the test run, fully open the spindle.
If not fully opened, the devices will be damaged.
Do not attempt to turn service valve rod beyond its stop.
Do not loosen the stop ring. If the stop ring is loosened, it is
dangerous since the spindle will hop out.
10.4. REFRIGERANT PIPING
The refrigerant piping between the indoor unit and the outdoor
unit should be designed using the following chart.
Keep the design point within the dark area of the chart, which
is showing the applicable height difference according to piping
length.
10.4.1. REFRIGERANT PIPING LENGHT
When outdoor
unit is installed
higher than
indoor unit
When outdoor
unit is installed
lower than indo-
or unit
Height difference
(m)
Total length between outdoor unit
and indoor unit.
40
Setting of Pipe Length DSW.
DSW2 setting will be required only when the refrigerant
pipe length is shorter than 5 m. Pipe length setting shall be
performed as shown below.
(The side in the table below shows the DSW location)
DSW2 on Outdoor PCB1
Factory setting Installer setting
Pipe length between 5 m and 30 m Pipe Length 5 m or shorter
REFRIGERANT PIPING &
REFRIGERANT CHARGE
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