System Examples; Leading Power Line And Transmission Line; Field Line Connection: Cool/Heat Selection - Daikin ERQ200A7W1B Installation Manual

8.5.

System examples

(See figure 14)
1 Field power supply outdoor unit (400 V)
2 Fuse
3 Earth leakage breaker
4 Outdoor unit
5 To control box
Use the conductor of sheathed wire (2 wire) (16 V, no polarity)
6 Power supply terminal
7 Outdoor unit PC board (A1P)
8 Control box
9 Field power supply control box (sheathed wire) (230 V)
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 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 the 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).
Installation manual
10
(See figure 15)
3
 Use a power wire pipe for the power wiring.
 Outside the unit, make sure the weak 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 cause electrical interference,
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: cool/heat selection" on
page 10.
• 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.
8.7.

Field line connection: cool/heat selection

(See figure 16)
1 Cool/heat selector
2 Outdoor unit PC board (A1P)
3 Take care of the polarity
4 Use the conductor of sheathed wire (2 wire) (no polarity)
5 Control box
6 Outdoor unit
Fixing transmission wiring
Inside switchbox
1 Heating/cooling switching remote control cord (when a heating/
cooling switch remote control (optional) or field supplied control
box is connected) (ABC)
2 Fix to the indicated plastic brackets using field supplied clamping
material.
3 Wiring between the units (control box - outdoor) (F1+F2 left)
4 Plastic bracket
Outside unit
 Never connect the power supply to transmission
wiring terminal block. Otherwise the entire system
may break down.
 Never connect 400 V to the terminal block of the
interconnecting wiring. Doing so will break the entire
system.
- The wiring from the control box must be connected
to the F1/F2 (In-Out) terminals on the PC board in
the outdoor unit.
- After installing the interconnecting wires inside the
unit, wrap them along with the on-site refrigerant
pipes using finishing tape, as shown in
1 Liquid pipe
2 Gas pipe
3 Insulator
4 Interconnecting wiring
5 Finishing tape
For the above wiring, always use vinyl cords with 0.75
2
to 1.25 mm sheath or cables (2-core wires). (3-core
wire cables are allowable for the cooler/heater
changeover remote controller only.)
(See figure 17)
figure
ERQ125~250A7W1B
Inverter condensing unit
4PW51323-1D – 2022.10
11.
18.