Daikin RWEYQ144PTJU Installation Manual Download

Page: 13 / 24

English

FIELD WIRING

NOTE

• All field wiring and components must be installed by a licensed elec-

trician and must comply with relevant local and national regulations.

• The field wiring must be carried out in accordance with the wiring

diagrams and the instructions given below.

• Be sure to use a dedicated power circuit. Never use a power supply

shared by another appliance.

• Do not operate until refrigerant piping work is completed.

(If operated before complete the piping work, the compressor may
be broken down.)

• Never remove thermistor, sensor or etc. when connecting power wir-

ing and transmission wiring.
(If operated with thermistor, sensor or etc. removed, the compressor
may be broken down.)

• Be sure to install a ground fault circuit interrupter.

(This unit uses an inverter, so install a ground fault circuit interrupter
that be capable of handling high harmonics in order to prevent mal-
functioning of a ground fault circuit interrupter itself.)

• This product have reversed phase protection detector only works

when the product started up.

• Replace two of the three phases (L1, L2, and L3) during reverse-

phase protection circuit operation.
Reversed phase detection is not performed while the product is
operating.

• Do not run the unit by short cutting the protection device (S1PH).

If there exists the possibility of reversed phase, lose phase, momen-
tary black out or the power goes on and off while the product is oper-
ating, attach a reversed phase protection circuit locally. Running the
product in reversed phase may break the compressor and other
parts.

• Attach the power wire securely.

8-1 Optional parts

COOL/HEAT Selector
S1S ...............................Selector switch (fan, cool/heat)
S2S ...............................Selector switch (cool/heat)

NOTE

•

Use copper conductors only.

•

When using the adaptor for sequential start, refer to chapter “Exam-
ples”.

•

For connection wiring to outdoor-outdoor transmission F1-F2, out-
door-indoor transmission F1-F2, refer to chapter “Examples”.

•

For connection wiring to the central remote controller, refer to the
installation manual of the central remote controller.

•

Use insulated wire for the power cord.

8-2 Power circuit and cable requirements

A power circuit (see table below) must be provided for connection of the
unit. This circuit must be protected with the required safety devices, i.e.
a main switch, a slow blow fuse on each phase and a ground fault circuit
interrupter.

NOTE

•

Select the power supply cable in accordance with relevant local and
national regulations.

•

Wire size must comply with the applicable local and national code.

•

Specifications for local wiring power cord and branch wiring are in
compliance with local cord.

8-3 General

• Make sure to connect the power source wire to the power source ter-

minal block and to clamp it as shown in figure 8, chapter “Field line
connection”.

• As this unit is equipped with an inverter, installing a phase advancing

capacitor will not only reduce the power factor improvement effect,
but also may cause the capacitor to overheat due to high-frequency
waves. Therefore, never install a phase advancing capacitor.

• Keep power imbalance within 2% of the supply rating.

Large imbalance will shorten the life of the smoothing capacitor.

As a protective measure, the product will stop operating and an
error indication will be made, when power imbalance exceeds 4%
of the supply rating.

• Follow the “electrical wiring diagram” when carrying out any electri-

cal wiring.

• Only proceed with wiring work after blocking off all power.
• Always ground wires. (In accordance with national regulations of the

pertinent country.)

•

This unit uses an inverter, and therefore generates noise, which will
have to be reduced to avoid interfering with other devices. The outer
casing of the product may take on an electrical charge due to leaked
electrical current, which will have to be discharged with the ground-
ing.

•

This unit has a negative phase protection circuit. (If it operates, only
operate the unit after correcting the wiring.)

WARNING

• Do not ground units to gas pipes, sewage pipes, lightning rods, or

telephone ground wires because incomplete grounding could
cause a severe shock hazard resulting in severe injury or death.

Gas pipes:

can explode or catch fire if there is a gas leak.

Sewage pipes:

no grounding effect is possible if hard plastic pip-

ing is used.

Telephone ground wires and lightning rods:

dangerous when

struck by lightning due to abnormal rise in electrical potential in the
grounding.

8-4 Examples

System example (Refer to figure 8)

Field power supply

Main switch

Disconnect switch

Fuse

Ground fault circuit interrupter

Remote controller

Outside unit

BS unit

Indoor unit

10.

Cool / heat selector

power supply wiring (sheathed cable)

transmission wiring (sheathed cable)

CAUTION

• Use a power wire pipe for the power wiring.
• Outside the unit, make sure the low-voltage electric wiring (i.e. for the

remote controller, tarnsmission, etc.) and the high-voltage electric wir-
ing do not pass near each other, keeping them at least 5 in. apart. Prox-
imity 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 in

Field line connection

• Transmission wiring should be secured as described in

Field line

connection.

• Secure the wiring with the accessory clamps so that it does not touch

the piping.

• Make sure the wiring and the electrical components box lid do not

stick up above the structure, and close the cover firmly.

WARNING

•