Daikin REYQ192MTJU Installation Manual Download

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[Additional refrigerant charge procedure]
To learn the system settings for additional refrigerant charging, refer to
the [Service Precaution] label attached on the back of the electric box lid
in the outdoor unit.

Fully open the suction gas line and discharge gas line stop valves
(liquid line stop valve and valve A and valve B above must be left
fully closed) and start the additional refrigerant charge operation.

After the system is charged with a specified amount of refriger-
ant, press the confirmation button (BS3) on the PC-board (A1P)
in the outdoor unit to stop the additional refrigerant charge oper-
ation.

Immediately restore the stop valve to the following status. (The
test operation cannot be performed properly if the stop valve is
not correct.)

Multiple outdoor units installed
(Refer to figure 12)

Fully open the suction gas line and discharge gas line stop valve
(liquid line stop valve and valves A, B and C above must be left
fully closed), start the additional refrigerant charge operation.

After the system is charged with a specified amount of refriger-
ant, press the confirmation button (BS3) on the P-board (A1P) in
the outdoor unit to stop the additional refrigerant charge opera-
tion.

Immediately restore the stop valve to the following status. (The
test operation cannot be performed properly if the stop valve is
not correct.)

NOTE

If the refrigerant cylinder is siphonal, set it upright while charging
additional refrigerant.

7. FIELD WIRING

NOTE

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

cian 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.

This product’s reversed phase protection detector only works when

the product started up.

The reversed phase protection detector is designed to stop the

product in the event of an abnormalities when the product is 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.

If there exists the possibility of reversed phase after an momentary

black out and 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 can break the compressor and other

parts.

7-1 Optional parts

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.

7-2 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 an earth leak detec-

tor.

When using residual current operated circuit breakers, be sure to use a
high-speed type 200mA rated residual operating current.

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.

7-3 General

•

Make sure to connect the power supply wire to the power supply ter-
minal block and to clamp it as shown in figure 14, chapter “Field line
connection”.

•

As this unit is equipped with an inverter, installing a phase advancing
capacitor not only will deteriorate power factor improvement effect,
but also may cause capacitor abnormal heating accident 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.)

•

Do not connect the ground wire to gas pipes, sewage pipes, lightning
rods, or telephone ground wires.

•

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.

•

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.

•

Be sure to install an earth leak detector. (One that can handle higher
harmonics.)
(This unit uses an inverter, which means that an earth leak detector
capable handling high harmonics in order to prevent malfunctioning
of the earth leak detector itself.)

•

Earth leak detector which is especially for protecting ground-faults should be
used in conjunction with main switch or fuse for use with wiring.

•

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

Liquid line
stop valve

Suction gas line

stop valve

Discharge gas line

stop valve

Oil-equalizing line

stop valve

Open