Panasonic U-8ME3XPQ Manuel D'installation page 8

One outdoor unit installed: In case of U-8~16ME3
Front connection:
Remove the stop valve cover to connect. (See figure 5)
Side (bottom) connection:
Remove the knock holes on the bottom frame and route the piping
under the bottom frame. (See figure 5)
A Front connection:
Remove the stop valve cover to connect.
B Side (bottom) connection:
Remove the knock holes on the bottom frame and route the piping
under the bottom frame
1 Suction gas side accessory pipe (1)(2)(3)
2 Suction gas line
3 Liquid gas line
4 Discharge gas line
5 Discharge gas side accessory pipe (1)(2)(3)
6 Liquid side piping (field supply)
7 Flare nut
8 Oil-equalizing piping stop valve
9 No piping work is needed
10 Discharge gas piping (field supply)
11 Liquid gas piping (field supply)
12 Suction gas piping (field supply)
13 Knockout hole
Punch the knock holes.
14 Oil-equalizing piping (field supply)
15 Same legend as for U-8~16ME3 in figure 5.
When multiple outdoor units are installed: In case of
U-18~48ME3
To connect the piping between outdoor units, an optional piping kit
(multi connection piping kit) is always required. When installing the
piping, follow the instructions in the installation manual that comes
with the kit.
Front connection:
Remove the stop valve cover to connect.
Side (bottom) connection:
Remove the knock holes on the bottom frame and route the
piping under the bottom frame.
Be sure to use the supplied accessory pipes when
carrying out piping work in the field.
Be sure that the field installed piping does not touch
other pipes, the bottom panel or side panel.
Especially for the bottom and side connection, be sure
to protect the piping with suitable insulation, to
prevent it from coming into contact with the casing.
Installation manual
5
(See figure 5)
(See figure 5)
Precautions when knocking out knock holes
Be sure to avoid damaging the casing.
After knocking out the holes, we recommend you paint the
edges and areas around the edges using the repair paint to
prevent rusting.
When passing electrical wiring through the knock holes, wrap
the wiring with protective tape to prevent damage.
2 Make sure to perform the piping installation within the range of
the maximum allowable pipe length, allowable level difference
and allowable length after
"6.3. Example of connection" on page 7.
3 For installation of the refrigerant branching kit (Refnet), refer to
the installation manual delivered with the kit.
4 Pipe connection
Only use the flare nuts included with the unit.
Using different flare nuts may cause the refrigerant to leak.
NOTE The pressure regulator for the nitrogen released when
doing the brazing should be set to 0.02 MPa or less.
(See figure 7)
1 Refrigerant piping
2 Location to be brazed
3 Nitrogen
4 Taping
5 Manual valve
6 Regulator
7 Nitrogen
5 Protection against contamination when installing pipes
- Take measures to prevent foreign materials like moisture and
contamination from mixing into the system.
Installation period
More than a month
Less than a month
Regardless of the
period
- Great caution is needed when passing copper tubes through
walls.
branching as indicated in
Protection method
Pinch the pipe
Pinch or tape the pipe
U-8~16ME3XPQ
Urban Multi air conditioner
4PW16786-1C