Panasonic U-5MX3XPQ, Installation Manual

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U-5~48MX3
Urban Multi air conditioner
4PW16235-1C Installation manual
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 branching as indicated in
"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.
5 Protection against contamination when installing pipes
- Take measures to prevent foreign materials like moisture and
contamination from mixing into the system.
- Great caution is needed when passing copper tubes through
walls.
Precautions when selecting branch piping.
If the overall equivalent piping length is
≥
90 m, be sure to enlarge the
pipe diameter of the liquid-side and gas-side main piping. (This does
not apply to U-5MX3 type)
If the recommended pipe size is not available, stick to the original
pipe diameter (which may result in a small capacity decrease).
<Cautions for installation of multiple outdoor units>
1. The piping between the outdoor units must be routed level or slightly
upward to avoid the risk of oil detention into the piping side.
Pattern 1
Pattern 2
Prohibited pattern: Change to Pattern 1 or 2
■
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.
NOTE The pressure regulator for the nitrogen released when
doing the brazing should be set to 0.02 MPa or less.
(See figure 7)
Installation period Protection method
More than a month Pinch the pipe
Less than a month
Pinch or tape the pipe
Regardless of the
period
1 Refrigerant piping
2 Location to be brazed
3 Nitrogen
4 Taping
5 Manual valve
6 Regulator
7 Nitrogen
[Gas side]
U-5MX3 Ø15.9
➞
Ø19.1
U-8MX3 Ø19.1
➞
Ø22.2
U-10MX3 Ø22.2
➞
Ø25.4
U-12+14MX3 Ø28.6
➞
Not Increased
U-16~22MX3 Ø28.6
➞
Ø31.8
U-24MX3 Ø34.9
➞
Not Increased
U-26~34MX3 Ø34.9
➞
Ø38.1
U-36~48MX3 Ø41.3
➞
Not Increased
[Liquid side]
U-5MX3 Ø9.5
➞
Not Increased
U-8+10MX3 Ø9.5
➞
Ø12.7
U-12~16MX3 Ø12.7
➞
Ø15.9
U-18~24MX3 Ø15.9
➞
Ø19.1
U-26~48MX3 Ø19.1
➞
Ø22.2
1
2
2
1
1 To indoor unit
2 Piping between outdoor units
1
1
1 To indoor unit
1
1
1 To indoor unit