Leading Power Line And Transmission Line; Field Line Connection: Transmission Wiring - Daikin VRV III REMQ8P7Y1B Installation Manual

8.6.

Leading power line and transmission line

Be sure to let the power line and the transmission line pass
through a conduit hole.
Lead 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) or from a knock out hole to be
made in the unit's bottom plate.
1 Electric wiring diagram. Printed on the back of the electric box lid.
2 Power wiring and ground wiring between outdoor units (inside
conduit)
(When the wiring is routed out through the lateral panel.)
3 Transmission wiring
4 Pipe opening
5 Conduit
6 Power wiring and ground wiring
7 Cut off the shaded zones before use.
8 Through hole cover
Precautions when knocking out knockout holes
To punch a knockout hole, hit on it with a hammer.
After knocking out the holes, we recommend you paint the
edges and areas around the edges using repair paint to prevent
rusting.
When passing electrical wiring through the knockout holes,
remove any burrs from the knockout hole edges. Wrap the wiring
with protective tape in order to prevent damage to the wires, put
the wires through field supplied protective wire conduits at that
location, or install suitable field supplied wire nipples or rubber
bushings into the knockout holes.
1 2
1 Knockout hole
2 Burr
3 If there are any possibilities that small animals enter the system
through the knockout holes, plug the holes with packing materials
(to be prepared on-site).
Use a power wire pipe for the power wiring.
Outside the unit, make sure the low voltage electric
wiring (i.e. for the remote control, between units, etc.)
and the high voltage electric wiring do not pass near
each other, keeping them at least 50 mm apart.
Proximity may
malfunctions, and breakage.
Be sure to connect the power wiring to the power
wiring terminal block and secure it as described under
"8.8. Field line connection: power wiring" on page
Inter-unit wiring should be secured as described in
"8.7. Field line connection: transmission wiring" on
page 14.
• Secure the wiring with the accessory clamps so
that it does not touch the piping and no external
force can be applied to the terminal.
• Make sure the wiring and the electric box lid do not
stick up above the structure and close the cover
firmly.
REMQ8~16P7Y1B
VRVIII System air conditioner
4PW37156-1
(See figure 17)
3
cause electrical interference,
15.
8.7.

Field line connection: transmission wiring

(See figure 18)
(a)
1 Master unit
(a)
2 Slave unit
3 Outdoor unit A
4 Outdoor unit B
5 Outdoor unit C
6 Never connect the power supply wire
7 To outdoor unit of other system
8 Use duplex wires (no polarity)
9 BS unit
10 Indoor unit
11 Indoor unit (cooling only)
(a) The outdoor unit that connect the transmission wiring to the BS unit is the master
unit of the multi system, while the other units are slave units. (In this figure
outdoor unit A is the master unit.)
Test operation, on site settings etc. are done by operating the PC-board (A1P) of
the master unit.
The interconnecting wiring between the outdoor units in the
same piping system must be connected to the Q1/Q2 (Out Multi)
terminals. Connecting the wires to the F1/F2 (Out-Out) terminals
results in system malfunction.
The wiring to other systems must be connected to the F1/F2
(Out-Out) terminals of the P-board in the outdoor unit to which
the interconnecting wiring for the BS box or indoor units is
connected.
The master unit is the outdoor unit to which the interconnecting
wiring for the BS unit or indoor units is connected.
Fixing transmission wiring (See figure 20)
Inside switchbox
1 Fix to the indicated plastic brackets using field supplied clamping
material.
2 Wiring between the units (Outdoor - outdoor) (F1+F2 right)
3 Wiring between the units (Indoor - outdoor) (F1+F2 left)
4 Wiring for multi connection (Q1+Q2)
5 Plastic bracket
6 Field supplied clamps
When connecting wires to the terminal block on the PC-board, too
much heat or tightening could damage the PC-board. Attach with
care.
See the table below for the tightening torque of the transmission
wiring terminals.
Screw size
M3.5 (A1P)
Tightening torque (N•m)
0.80~0.96
Installation manual
14