Before Installation; Standard Supplied Accessories; Mandatory Connection Kit; Model Series - Daikin LREQ15B7Y1R Installation Manual

2.

BEFORE INSTALLATION

CAUTION
• When installing the indoor unit, refer to the installation manual
provided for the indoor unit.
• Use the outdoor unit multi-connection piping kit(EKHRQZM) to
split up the gas piping and connect it to the different outdoor units.
• 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) Clamp (2)
Quan-
10 pcs. 2 pcs.
tity
Shape
Small
Miscellaneous
• Installation manual
• Operation manual
• Refrigerant label
• Refrigerant oil label

2-2 Mandatory connection kit

Outdoor unit multi-connection piping kit.
Gas side Gas side
Name Branch pipe Branch pipe
(1) (2)
Quantity 1 pc. 2 pc.
Shape

2-3 Model series

LREQ15-20

2-4 Example of system configuration

Name Outdoor unit
Shape
Indoor unit
Name
Unit cooler
Shape
Installation manual
3
Liquid side Liquid side Gas side
accessory accessory accessory
pipe (1) pipe (2) pipe (1)
1 pc. 1 pc. 1 pc.
Gas side Gas side
Branch pipe Branch Sight glass
(3) pipe (4)
2 pc. 2 pc.
Indoor unit
Unit cooler Showcase
Control panel Warning
(Defrost) panel
Showcase
LREQ15, LREQ20
1 Operation manual
2 Installation manual
3 Clamps
4 Accessory pipes (Installed on bottom frame)

2-5 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.
• Make sure the total internal volume of indoor units connected to the
condensing units is 80 l or lower.
• Starting from an outdoor temperature of 32°C, the total indoor unit
capacity needs to be 50% or more of the total outdoor unit capacity.
1 pc.
3.

SELECTION OF LOCATION

Select a location for installation that meets the following conditions.
Get the customer's permission.
1.
There is no danger of fire due to leakage of inflammable gas.
2.
Select the location of the unit in such a way that neither the
discharged air nor the sound generated by the unit disturb anyone.
3.
The foundation is strong enough to support the weight of the unit
and the floor is flat to prevent vibration and noise generation.
4.
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.
6.
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 4
space requirements.)
1, 2, 3
4
6)
for the minimum
LREQ15+20B7Y1R
Air cooled refrigeration condensing unit
4P360438-1B – 2014.01