Daikin LREQ5B7Y1 Installation Manual Download

Page: 5 / 24

LREQ5~20B7Y1

Air cooled refrigeration condensing unit

4PW74302-1 – 2012.06

Installation manual

CAUTION

• Carry out drain piping properly following this installation manual

and insulate the pipe to prevent condensation.
Improper drain piping may result in indoor water leakage and
property damage.

• Install the indoor and outdoor units, power cord and connecting

wires at least 1 meter away from televisions or radios to prevent
picture interference and noise.
(Depending on the incoming signal strength, a distance of 1 meter
may not be sufficient to eliminate noise.)

• Do not install the condensing unit in the following locations:

1. Where there is a high concentration of mineral oil spray or

vapour (e.g. a kitchen).
Plastic parts may deteriorate and cause parts to fall off or water
to leak.

2. Where corrosive gas, such as sulphurous acid gas, is produced.

Corrosion of copper pipes or brazed parts may occur and cause
refrigerant leakage.

3. Where there is a machine that generates electromagnetic wave

and where voltage fluctuation often occurs such as a factory.
Control system may malfunction and as a result the unit may
not properly operate.

4. Where flammable gas may leak, where carbon fibre or ignitable

dust is suspensions in the air, or where volatile flammables
such as paint thinner or gasoline are handled.
Operating the unit in such conditions may result in fire.

5. Vehicles, ships, or other places that generate vibration or cause

the condensing unit to move.
The condensing unit may malfunction or cause oxygen
deficiency accidents as a result of refrigerant leakage.

6. Places with excessive voltage fluctuations.

The condensing unit may malfunction.

7. Places where fallen leaves accumulate or weeds grow thick.
8. Places that become small animals’ shelter.

Small animals coming in contact with electrical parts can cause
malfunctions, smoke, or ignition.

• The condensing unit is not intended for use in a potentially

explosive atmosphere.

1-2 Special notice of product

This condensing unit comes under the term “appliances not
accessible to the general public”.
[CLASSIFICATION]

This condensing unit comes under the term “appliances not
accessible to the general public”.
Refer to the connected indoor unit to know the climate class
(EN60335-2-89).

[EMC CHARACTERISTICS]

This system is a class A product. In a domestic environment this
product may cause radio interference in which case the user may be
required to take adequate measures.

[REFRIGERANT]
This System use R410A refrigerant.

CAUTION

This unit is already filled with a certain amount of R410A.
Never open liquid and gas shutoff valve until the step specified in

"9. CHECKS AFTER WORK COMPLETION" on page 15

• The refrigerant R410A requires that strict precautions be observed

for keeping the system clean, dry and tightly sealed.
Read the chapter

"6. REFRIGERANT PIPING" on page 5

carefully

and follow these procedures correctly.
A.Clean and dry

Strict measures must be taken to keep impurities (including
SUNISO oil and other mineral oils as well as moisture) out of the
system.

B.Tightly sealed

Take care to keep the system tight when installing.
R410A contains no chlorine, does not destroy the ozone layer
and so does not reduce the earth’s protection against harmful
ultraviolet radiation. R410A will contribute only slightly to the
greenhouse effect if released into the atmosphere.

• 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.

• Be sure to perform refrigerant replenishment.

Refer to

"9. CHECKS AFTER WORK COMPLETION" on page 15

and the label of instructions on refrigerant replenishment on the
cover surface of the control box,

Important information regarding the refrigerant used

This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol. Do not vent gases into the atmosphere.
Refrigerant type : R410A
GWP

(1)

value : 1975

(1)

GWP = global warming potential

Please fill in with indelible ink,



the factory refrigerant charge of the product,



the additional refrigerant amount charged in the field and



the total refrigerant charge

on the refrigerant charge label supplied with the product.

The filled out label must be adhered in the proximity of the product
charging port (e.g. onto the inside of the service cover).

[DESIGN PRESSURE]

Since design pressure is 3.8 MPa or 38 bar (for R407C units :
3.3 MPa or 33 bar), 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, of oil and of other
parts must be done in accordance with relevant local and national
legislation.

2. BEFORE INSTALLATION

CAUTION

• When installing the indoor unit, refer to the installation manual

provided for the indoor unit.

• Optional accessories are required for the installation of the

product. Refer to the information on optional accessory.

2-1 Standard supplied accessories

The following accessories are included. The storage location of the
accessories is shown in the figure.

Note

Do not throw away any of the accessories until installation is complete.

Name

Clamp (1)