English
6
6-4 Connecting the refrigerant piping
1.
Direction to bring out the pipes
The pipes (liquid, gas, and equalizer pipes) between outdoor units
in the case of the outdoor unit multi system, the pipes (liquid and
gas pipes) between the outdoor and function units, and the con-
necting pipes (liquid and gas pipes) between the function and
indoor units can be taken out from the front or lower sides of the
units as shown in fig. 9.
When passing out through the bottom, use the knock hole in the
bottom frame.
(Refer to figure 9)
1.
Outdoor unit
2.
Function unit
3.
Front connections
4.
Bottom connections
5.
To indoor unit
Precautions when knocking out knock holes
•
Open knock hole in the base frame by drilling the concave around
it with a 6mm bit.
(Refer to figure 10)
(Refer to figure 10)
1.
For outdoor unit
2.
For functional unit
3.
Knock hole (large) for liquid and gas pipes
4.
Drill (6 mm dia.)
5.
Dent (four points)
6.
Knock hole (large and small) for liquid and gas pipes on
outdoor unit side
7.
Knock hole (large and small) for liquid and gas pipes for
indoor unit side
8.
Dent (two points)
9.
Knock hole (small) for equalizer pipe
(Only use in case of multi outdoor unit system)
•
Be sure to avoid damaging the casing
•
After knocking out the holes, we recommend you remove any
burrs and paint them using the repair paint to prevent rusting.
•
When passing electrical wiring through the knock holes, protect
the wiring with a conduit or bushings, making sure not to damage
the wiring.
2.
Removing Pinch Piping
•
When connecting refrigerant piping to an outdoor unit or function
unit, remove the pinch piping using the procedure in the figure 11
or the figure 12.
•
About handling of shutoff valves, refer to [Shutoff valve operation
procedure] in “
9-1 Before working
”.
Caution
After removing the gass, remove the pinch piping.
Any gas remaining inside may blow off the pinch piping when you dis-
solve the brazing, causing damage.
(Refer to figure 11)
1.
Removal procedure for pinch piping of outdoor unit
2.
Pinch pipe A
3.
Pinch pipe B
4.
Pinch pipe C (*)
5.
Never remove the relay pipe.
6.
Never remove this pinch pipe.
7.
Step 1: Check that the stop valve is closed.
8.
Step 2: Connect the charge hose to the stop valve, and
extract the gas in the pinch piping.
9.
After the gas is extracted, melt the blazing material with
a burner and remove the pinch pipes.
10.
Pinch pipe
(*) The pinch pipes to be removed varies with the system.
Refer to the following table and remove the correspond-
ing pinch pipes.
(Refer to figure 12)
1.
Removal procedure for pinch piping of function unit
2.
Pinch pipes (×4)
3.
Step 1: Cut the port piping connected to the pinch piping
with an appropriate tool, such as a pipe cutter.
Then extract the gas in the pinch piping.
4.
Step 2: After the gas is extracted, melt the blazing mate-
rial with a burner and remove the pinch pipes.
3.
Connecting refrigerant piping to outdoor units and function unit
•
Figure 13 shows a connection example of refrigerant piping to the
outdoor unit in the case of the single outdoor unit system.
Figure 14 shows a connection example of refrigerant piping to the
outdoor units in the case of the multi outdoor unit system.
Figure 15 shows a connection example of refrigerant piping to the
function unit.
•
For the detailed connection method of the outdoor units in the
case of the multi outdoor unit system, follow the instructions in
“
4.
Piping Connections between Outdoor Units” and the installa-
tion manual provided with the outdoor unit multi connection piping
kit (sold separately).
Note
•
The equalizer piping connects the outdoor units in the case of the
multi outdoor unit system. There are no connections to the function
unit.
•
The L-shaped joint (locally arranged) with a diameter of 19.1 mm
is required to connect the refrigerant piping to the outdoor unit,
gas pipe shutoff valve and gas side accessory pipe (2), and the
connecting piping of the equalizer shutoff valve and equalizer side
accessory pipe (2).
•
The liquid pipe, gas pipe, equalizer pipe (for the multi outdoor unit
system only), and some L-shaped joints to be connected to the
provided piping should be procured locally.
•
Make sure the onsite piping does not come into contact with other
piping or the bottom frame or side panels of the unit.
(Refer to figure 13)
1.
Bottom connections
2.
Front connections
3.
Gas pipe shutoff valve
4.
Liquid pipe shutoff valve
5.
Liquid side accessory pipe (1)
6.
Liquid side accessory pipe (2)
7.
Gas side accessory pipe (1)
8.
Gas side accessory pipe (2)
9.
Gas side accessory pipe (3) (*1)
10.
L-shaped joint (procured locally)
11.
Piping on liquid side (procured locally)
12.
Piping on gas side (procured locally)
13.
Blazing
14.
To function unit
(Refer to figure 14)
1.
Bottom connections
2.
Front connections
3.
Liquid pipe shutoff valve
4.
Gas pipe shutoff valve
5.
Equalizer shutoff valve
6.
Liquid side accessory pipe (1)
7.
Liquid side accessory pipe (2)
8.
Gas side accessory pipe (1)
9.
Gas side accessory pipe (2)
10.
Gas side accessory pipe (3) (*2)
11.
Equalizer side accessory pipe (1)
12.
Equalizer side accessory pipe (2)
13.
L-shaped joint (procured locally)
14.
Blazing
(Refer to figure 15)
1.
Bottom connections
2.
Front connections
3.
Liquid side accessory pipe (3)
4.
Liquid side accessory pipe (4)
5.
Gas side accessory pipe (3) (*3)
6.
Gas side accessory pipe (3) (*3) (*4)
7.
Gas side accessory pipe (4)
8.
Gas side accessory pipe (5)
System type
Outdoor unit name
Pinch pipes to be
removed
Single outdoor
unit system
RTSQ10 · 14 ·
16PY1
Pinch pipes
A and B
Multi outdoor unit
system
RTSQ8 · 12PY1
Pinch pipes
A and B, C
01_EN_3P201178-10P.fm Page 6 Wednesday, September 2, 2009 11:10 AM
