Daikin VRV III REMQ72PBYD Engineering Data Download

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EDUS391004-N

Installation

Installation of Outdoor Units

•

Do not turn off the power immediately after stopping
operation. Always wait for at least 5 minutes before turning
off the power. Otherwise, water leakage may occur.

•

Do not use a charging cylinder. Using a charging cylinder
may cause the refrigerant to deteriorate.

•

Refrigerant R-410A in the system must be kept clean, dry,
and tight.

(a) Clean and Dry -- Foreign materials (including mineral

oils such as SUNISO oil or moisture) should be
prevented from getting into the system.

(b) Tight -- R-410A does not contain any chlorine, does not

destroy the ozone layer, and does not reduce the
earth’s protection again harmful ultraviolet radiation.
R-410A can contribute to the greenhouse effect if it is
released. Therefore take proper measures to check for
the tightness of the refrigerant piping installation.
Read the chapter

Refrigerant Piping

and follow the

procedures.

•

Since R-410A is a blend, the required additional refrigerant
must be charged in its liquid state. If the refrigerant is
charged in a state of gas, its composition can change and
the system will not work properly.

•

The indoor unit is for R-410A. See the catalog for indoor
models that can be connected. Normal operation is not
possible when connected to other units.

•

Remote controller (wireless kit) transmitting distance can
be shorter than expected in rooms with electronic
fluorescent lamps (inverter or rapid start types). Install the
indoor unit far away from fluorescent lamps as much as
possible.

•

Indoor units are for indoor installation only. Outdoor units
can be installed either outdoors or indoors. This unit is for
indoor use.

•

Do not install the air conditioner or heat pump in the
following locations:
(a) Where a mineral oil mist or oil spray or vapor is produced,

for example, in a kitchen.
Plastic parts may deteriorate and fall off or result in water
leakage.

(b) Where corrosive gas, such as sulfurous acid gas, is

produced.
Corroding copper pipes or soldered parts may result in
refrigerant leakage.

(c) Near machinery emitting electromagnetic waves.

Electromagnetic waves may disturb the operation of the
control system and cause the unit to malfunction.

(d) Where flammable gas may leak, where there is carbon

fiber, or ignitable dust suspension in the air, or where
volatile flammables such as thinner or gasoline are
handled. Operating the unit in such conditions can cause
a fire.

•

Take adequate measures to prevent the outside unit from
being used as a shelter by small animals. Small animals
making contact with electrical parts can cause
malfunctions, smoke, or fire. Instruct the customer to keep
the area around the unit clean.

NOTE

•

Install the power supply and control wires for the indoor and
outdoor units at least 3.5 feet away from televisions or radios
to prevent image interference or noise. Depending on the
radio waves, a distance of 3.5 feet may not be sufficient to
eliminate the noise.

•

Dismantling the unit, treatment of the refrigerant, oil and
additional parts must be done in accordance with the
relevant local, state, and national regulations.

•

Do not use the following tools that are used with
conventional refrigerants: gauge manifold, charge hose,
gas leak detector, reverse flow check valve, refrigerant
charge base, vacuum gauge, or refrigerant recovery
equipment.

•

If the conventional refrigerant and refrigerator oil are mixed
in R-410A, the refrigerant may deteriorate.

•

This air conditioner or heat pump is an appliance that
should not be accessible to the general public.

•

As design pressure is 478 psi, the wall thickness of field-
installed pipes should be selected in accordance

with the

relevant local, state, and national regulations.

1-2 Special notice of product

[CLASSIFICATION]

This air conditioner comes under the term “appliances not accessible
to the general public”.

[REFRIGERANT]
VRV

III

System use R410A refrigerant.

•

The refrigerant R410A requires strict cautions for keeping the
system clean, dry and tight.
Read the chapter “REFRIGERANT PIPING” carefully and follow
these procedures correctly.
A. Clean and dry

Foreign materials (including mineral oils such as SUNISO oil or
moisture) should be prevented from getting mixed into the
system.

B. Tight

Take care to keep the system tight when installing.
R410A does not contain any chlorine, does not destroy the
ozone layer, and does not reduce the earth’s protection against
harmful ultraviolet radiation.
R410A can contribute slightly to the greenhouse effect if it is
released.

•

Since R410A is a mixed refrigerant, the required additional
refrigerant must be charged in its liquid state. If the refrigerant is
charged in a state of gas, its composition changes and the system
will not work properly.

[DESIGN PRESSURE]

Since design pressure is 478 psi, the wall thickness of pipes should
be more carefully selected in accordance with the relevant local and
national regulations.

1-3 Disposal requirements

Dismantling of the unit, treatment of the refrigerant, oil and eventual
other parts, should be done in accordance with the relevant local and
national regulations.

INTRODUCTION

•

REYQ-P series are designed for outdoor installation and used for
cooling and heating applications.

•

The Branch Selector units that combined with REYQ-P system for
changing the refrigerant flow to indoor units are BSVQ36 · 60 · 96P
type only. To combine with other type Branch Selector unit will
cause malfunction.