Daikin R-410A Installation Manual page 55

EDUS39-605
WARNING
Use only specified wire and connect wires to terminals
•
tightly. Be careful that wires do not place external stress
on terminals. Keep wires in neat order so as to not to ob-
struct other equipment. Incomplete connections could re-
sult in overheating and, in worse cases, electric shock or
fire.
CAUTION
When laying power wiring, use round pressure terminals
•
for connections to the power terminal block. When none
is available do not connect wiring of different thick-
nesses to the power terminal block as sl
When connecting wiring that is the same thickness, do
•
so as shown in the following figure:
.
Round pressure terminal
Connect same- It is forbidden to
thickness wiring connect two to
to both sides. one side.
Use an appropriate screwdriver for tightening the termi-
•
nal screws. A screwdriver with a small head will strip the
head and make proper tightening impossible.
Over-tightening the terminal screws may break them.
•
See tightening torque for the terminal screws in the fol-
•
lowing table:
Tightening torque (ft.Ibf)
M8 (Power terminal block)
M8 (Ground)
M3 (Inter-unit wiring terminal block)
Precautions when connecting the ground
When pulling the ground wire out, wire it so that it comes
through the cutout section of the cup washer. An improper
ground connection may prevent a good ground from being
achieved.
ound pressure terminal
Field line connection and transmission wiring:
In case of one outdoor unit (Refer to figure 15, page 39)
Outdoor unit
1.
Installation of Outdoor Units
Power wire
It is forbidden to
connect wiring of
different thicknesses.
4.06-5.38
0.59-0.72
Cup washer
Cut out section
Outdoor unit P.C. board (A1P)
2.
BS unit A
3.
BS unit B
4.
Last BS unit
5.
Indoor unit
6.
Remote controller
7.
Cool-only unit
8.
Use the conductor of sheathed wire (2 wire) (not
9.
polarity sensitive)
In case of multiple outdoor units (Refer to figure 17, page
39).
Unit A (Master unit)
1.
Unit B
2.
TO IN/D UNIT
3.
TO OUT/D UNIT
4.
TO MULTI UNIT
5.
To indoor unit
6.
To other systems
7.
NOTE
Be sure to follow the limits below. If the transmission wir-
•
ing is beyond these limits, it may result in malfunction of
transmission.
Maximum wiring length: 3280 ft.
Total wiring length: 6560 ft.
Maximum number of branches: 16
Maximum number of outdoor units connectable: 10
Never connect the power supply to transmission wiring
terminal block. Otherwise the entire system may break
down.
Refer to Figure 16, page 39.
Branch
1.
Sub-branching
2.
For low-noise operation, the optional External Control
Adaptor for Outdoor Unit is required.
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 front position
•
of the main unit.
(Refer to figure 18, page 39.)
Electric wiring diagram
1.
Printed on the back of the electric parts box lid.
Knockout hole
2.
Power line
3.
Transmission line
4.
Precautions when knocking out knockout holes
Punch out a knockout holes with a hammer.
•
After knocking out the holes, we recommend you paint
•
the edges and areas around the edges using the repair
paint to prevent rusting.
Power line: Open a knockout hole as shown on left and
•
connect the power line using a conduit.
Installation
54