Wiring Example For Wiring Inside Unit; Pipe Insulation; Checking Of Unit And Installation Conditions - Panasonic URBAN MULTI U-8ME4XPQ Manuel D'installation

8.9.

Wiring example for wiring inside unit

See figure 25.
1 Power wiring
2 Wiring between units
3 Clamp to the electric component box with field supplied clamps.
4 When routing out the power/ground wires from the right side:
5 When routing the remote control cord and inter-unit wiring, secure
clearance of 50 mm or more from the power wiring. Ensure that
the power wiring does not contact any heated sections (
6 Clamp to the back of the column support with field supplied
clamps.
7 When routing out the inter-unit wirings from the opening for piping
or from the front:
8 When routing out the power/ground wires from the front:
9 When routing out the power/ground wires from the left side:
10 Grounding wire
11 When wiring, pay attention not to detach the acoustic insulators
from the compressor.
Wire so that the ground wiring does not come into contact
with the compressor lead wiring. If they touch, this may
have an adverse effect on other devices.
Installation manual
14
9. P
IPE INSULATION
After finishing the leak test and vacuum drying, the piping must be
insulated. Take into account the following points:
Make sure to insulate the connection piping and refrigerant
branch kits entirely.
Be sure to insulate liquid and gas piping (for all units).
Use heat resistant polyethylene foam which can withstand a
temperature of 70°C for liquid piping and polyethylene foam
which can withstand a temperature of 120°C for gas piping.
).
Reinforce the insulation on the refrigerant piping according to
the installation environment.
Ambient temperature
≤30°C
>30°C
Condensation might form on the surface of the insulation.
If there is a possibility that condensation on the stop valve might
drip down into the indoor unit through gaps in the insulation and
piping because the outdoor unit is located higher than the indoor
unit, this must be prevented by sealing up the connections. See
figure 10.
1 Insulation material
2 Caulking, etc.
Be sure to insulate local pipes, as touching them can
cause burns.
10. C
HECKING OF UNIT AND INSTALLATION
CONDITIONS
Be sure to check the following:
The piping work
1 Make sure piping size is correct.
See "6.2. Selection of piping material" on page 5.
2 Make sure insulation work is done.
See "9. Pipe insulation" on page 14.
3 Make sure there is no faulty refrigerant piping.
See "6. Refrigerant piping" on page 4.
The electrical work
1 Make sure there is no faulty power wiring or loose nuts.
See "8. Field wiring" on page 9.
2 Make sure there is no faulty transmission wiring or loose nuts.
See "8. Field wiring" on page 9.
3 Make sure the insulation resistance of the main power circuit is
not deteriorated.
Measure the insulation resistance and check if the value is in
accordance with relevant local and national regulations.
Humidity Minimum thickness
75% to 80% RH 15 mm
≥80% RH
20 mm
U-8~16ME4XPQ
Urban Multi air conditioner
4PW40726-1A