Examples - Panasonic CU-8ME1XPK Installation Manual

Examples

System example (refer to figure 5)
1 field power supply
2 main switch
3 earth leak detector
4 fuse
5 HR box
6 indoor unit
7 remote controller
8 selection of cooling and heating
9 cooling only
power supply wiring (sheathed cable)
transmission wiring (sheathed cable)
Note
- Select the particular size of electrical wire for power supply
wiring in accordance with the standards of the given nation and
region.
Field line connection (refer to figure 6)
1 field power supply
2 electric parts box (left)
3 earth terminal
4 clamp the anchor
5 Outdoor unit P.C. board (A1P)
6 flat washer
7 C cup washer
8 grounding screw
9 spring washer
10 earth wire
11 use the conductor of sheathed wire (2 wire) / no polarity
12 connection line
13 transmission line
14 clamp material
15 HR box A
16 HR box B
17 last HR box
18 indoor unit
19 remote controller
20 cool-only unit
Caution
- Be sure to follow the limits below. If the unit-to-unit cables are
beyond these limits, it may result in malfunction of transmission.
Maximum wiring length: 1000m
Total wiring length: 2000m
Max branches No. of branches: 16
- Up to 16 branches are possible for unit-to unit cabling. No
branching is allowed after branching.
1 Branch
2 Subbranching
- Never connect the power supply to unit-to-unit cabling terminal
block. Otherwise the entire system may break down.
Sequential start
Make the outdoor unit cable connections shown below.
The outdoor unit PC board (A1P) is factory set at "Sequential
start available".
A1P
F1 F2 F1 F2
Caution
- For low-noise operation, it is necessary to get the optional
"External control adaptor for outdoor unit".
For details, see the installation manual attached to the adaptor.
Picking power line and transmission line
- Be sure to let the power line and the transmission line pass
through a conduit hole.
- Pick the power line from the upper hole on the left side plate,
from the front position of the main unit (through the conduit hole
of the wiring mounting plate - optional parts) or from a knock out
hole to be made in the unit's bottom plate.
- If you pick the power line from the front position of the unit,
proceed as follows and refer to figure 7:
- Remove the lower frontplate (1), punch a hole in the knock
hole and cut the hole (2) all the way to the slit.
- Attach the 3 sealing pads (optional parts) (3) on the wiring
mounting plate (optional parts) (4) corresponding to the
overlapped area of the front plate.
- Install the wiring mounting plate to the front side of the side
plate with the 2 delivered screws.
- Pick the transmission line from the middle positioned conduit
hole on the left side plate, from the lower conduit hole on the
right side plate or from the front position of the main unit (after
binding it to the piping with finishing tape as in figure 8).
1 discharge gas piping
2 suction gas piping
3 liquid piping
4 transmission line
5 heat insulator
6 finishing tape
Caution
- Be sure to keep the power line and transmission line apart from
each other.
- Be careful about polarity of the transmission line.
- Make sure that the transmission line is clamped as shown in the
figure in chapter "Field line connection".
- Check that wiring lines do not make contact with refrigerant
piping.
A1P
F1 F2 F1 F2
8