Installation manual
3
LREQ5~20B7Y1
Air cooled refrigeration condensing unit
4PW74302-1D – 2016.11
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.
2-2 Model series
LREQ5~20
2-3 Example of system configuration
1
Operation manual
2
Installation manual
3
Clamps
4
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
Name
Clamp (1)
Clamp (2)
Gas side
accessory
pipe (1)
Gas side
accessory
pipe (2)
Quantity
9 pcs.
2 pcs.
1 pc.
1 pc.
Shape
Small
Name
Liquid side acces-
sory
pipe (1)
Liquid side acces-
sory
pipe (2)
Operation manual
Quantity
1 pc.
1 pc.
1 pc.
Shape
Thin
Name
Installation manual
Fluorinated green-
house gases label
Multilingual fluori-
nated greenhouse
gases label
Quantity
1 pc.
1 pc.
1 pc.
Shape
Name
Outdoor unit
Indoor unit
Unit cooler
Showcase
Shape
Name
Indoor unit
Control panel
(Defrost)
Warning
panel
Unit cooler
Showcase
Shape
1, 2, 3
1, 2, 3
4
4
LREQ5, LREQ6
LREQ8, LREQ10, LREQ12
1, 2, 3
4
LREQ15, LREQ20
4PWEN74302-1D.book Page 3 Thursday, April 27, 2017 9:01 PM
