Specifications
EKEXV class
Allowed heat exchanger volume (dm
3
)
Allowed heat exchanger capacity in cooling (kW) Allowed heat exchanger capacity in heating (kW)
Minimum Maximum Minimum Standard Maximum Minimum Standard Maximum
50 0.76 1.65 5.0 5.6 6.2 5.6 6.3 7.0
63 1.66 2.08 6.3 7.1 7.8 7.1 8.0 8.8
80 2.09 2.64 7.9 9.0 9.9 8.9 10.0 11.1
100 2.65 3.3 10 11.2 12.3 11.2 12.5 13.8
125 3.31 4.12 12.4 14.0 15.4 13.9 16.0 17.3
140 4.13 4.62 15.5 16.0 17.6 17.4 18.0 19.8
200 4.63 6.6 17.7 22.4 24.6 19.9 25.0 27.7
250 6.61 8.25 24.7 28.0 30.8 27.8 31.5 34.7
Step 2: Select outdoor unit
Multiple AHU can be connected to a VRV system and the connection principle is similar as for ERQ. Connection of the full
system can be up till 110% including at least 1 Daikin indoor unit (cassette, duct, …) The capacity index of the AHU needs to
be calculated based on the indicated capacity of the selected expansion valve and the actual capacity.
The AHU capacity index = capacity class (expansion valve) * ratio (actual capacity AHU / standard capacity expansion valve)
Eg: AHU has a capacity requirement of 6.9kW and the selected expansion valvue is the EKEXV63 with a standard capacity of
7.1kW. So the AHU capacity = 63 * (6.9kW / 7.1kW) = 61 class
In case that in the system 2 FXSQ50 class are connected, the total sum of capacity would be 61 + 2*50 = 161 class
Based on the 161 class a 10 HP is required as outdoor unit.
1
For detailed specifications of VRV outdoor units, refer to the VRV catalogue or databooks
Step 3: Control box selection
EKEQMCB is the control box which is required to control the communication between the AHU and the VRV system beside
the standard communication of the Daikin DX indoor units (cassette, duct, wall…).
More information on the selection is available in the service manual.
MULTI APPLICATION
Step 1: Select required capacity of AHU
Based on the required capacity of the AHU please select the expansion valve
6.9
Eg: If the required capacity of the AHU is 6.9kW in cooling, which lies between 6.3 and 7.8, the EKEXV63 can be selected.
The heat exchanger capacity has priority over the volume of the heat exchanger and is therefore the determining factor for
the selection of the expansion valve. More information on the volume can be found in the data book and service manual.
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Step 1