Daikin LREQ5B7Y1 Installation Manual Download

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Installation manual

LREQ5~20B7Y1

Air cooled refrigeration condensing unit

4PW74302-1 – 2012.06

2-2 Model series

LREQ5~20

2-3 Example of system configuration

Operation manual

Installation manual

Clamps

Accessory pipes (Installed on bottom frame)

2-4 Indoor unit constraints

• Install an R410A mechanical thermostatic expansion valve on

each indoor unit.

• Insulate the feeler block of the mechanical thermostatic expansion

valve.

• Install an R410A solenoid valve (Max. operating differential

pressure of 3.5 MPa [35 bars] or over) on the primary side of the
mechanical thermostatic expansion valve described above for
each indoor unit.

• Install a filter on the primary side of the solenoid valve described

above for each indoor unit. Determine the filter mesh count based
on the size specified by the solenoid valve and mechanical
thermostatic expansion valve being used.

• Route the path to the indoor unit heat exchanger so that the flow of

refrigerant is from top to bottom.

• When installing a number of indoor units, be sure to install them at

the same level.

• Use either off-cycle defrosting or electric heater defrosting as the

defrosting type. Hot-gas defrosting models cannot be used.

• Set the total value of the internal volume for the evaporator

(Refrigerator/Freezer) to connect and the amount of refrigerant
inside the evaporator that can be recovered in the condenshing
unit by closing the liquid solenoid valve installed on the
refrigeration-side to the below amount or lower.
LREQ5, 6: 22 l or lower
LREQ8, 10, 12: 33 l or lower
LREQ15, 20: 42 l or lower

3. SELECTION OF LOCATION

Select a location for installation that meets the following conditions.
Get the customer’s permission.

There is no danger of fire due to leakage of inflammable gas.

Select the location of the unit in such a way that neither the
discharged air nor the sound generated by the unit disturb anyone.

The foundation is strong enough to support the weight of the unit
and the floor is flat to prevent vibration and noise generation.

The piping length between the outdoor unit and the indoor unit may
not exceed the allowable piping length.
(Refer to

"6. REFRIGERANT PIPING" on page 5

)

Locations where the unit’s suction vent and outlet vent do not
generally face the wind.
Wind blowing directly into the suction or outlet vents will interfere
with the unit’s operation.
If necessary, install some kind of obstruction to block the wind.

The space around the unit is adequate for servicing and the
minimum space for air inlet and air outlet is available.
(See the

"Installation Space Examples" on page 3

for the minimum

space requirements.)

Installation Space Examples

• The installation space requirement shown in the following figure is

a reference for cooling operation when the outdoor temperature is
32°C.
If the design outdoor temperature exceeds 32°C or the heat load
exceeds maximum capacity in all the outdoor unit, take an even
large space on the intake shown in the following figure.

• During installation, install the units using the most appropriate of

the patterns shown in the following figure for the location in
question, taking into consideration human traffic and wind.

• If the number of units installed is more than that shown in the

pattern in the following figure, install the units so there are no short
circuits.

• As regards space in front of the unit, consider the space needed for

the local refrigerant piping when installing the units.

• If the work conditions in the following figure do not apply, contact

your dealer or Daikin directly.

Name

Liquid side

accessory

pipe (1)