Daikin EKEXVA400 handleiding
Handleiding
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11 About the system
Installation and operation manual
11
EKEACBVE + EKEXVA50~500
Option kit for combination of Daikin outdoor units with field-
supplied air handling units
4P724517-1 – 2023.06
Note: In case of interlaced heat exchangers, the number of field
wires can be reduced by using a master-slave configuration. See
"11.9Master-slave configuration"[415].
O/U EKEA + EKEXVA
AHU
AHU HEX
O/U
O/U
EKEA + EKEXVA AHU HEX
EKEA + EKEXVA AHU HEX
AHU Air handling unit
AHU HEX Heat exchanger of the air handling unit
EKEA Control box
EKEXVA Expansion valve kit
O/U Outdoor unit
11.1.2 Multi AHU layout
In a multi AHU layout, there are several air handling units, each with
a separate expansion valve kit, connected to one outdoor unit
system (meaning one or more outdoor units that are connected to
the same refrigerant circuit).
O/U system EKEA + EKEXVA
AHU
AHU HEX
EKEA + EKEXVA
AHU
AHU HEX
EKEA + EKEXVA
AHU
AHU HEX
AHU Air handling unit
AHU HEX Heat exchanger of the air handling unit
EKEA Control box
EKEXVA Expansion valve kit
O/U system Outdoor unit system
11.1.3 Mixed AHU layout
In a mixed AHU layout, there are one or more air handling units,
each with a separate expansion valve kit, connected to one outdoor
unit system (meaning one or more outdoor units that are connected
to the same refrigerant circuit). Next to the expansion valve kits, also
normal VRV indoor units are connected to the same outdoor unit
system.
O/U system EKEA + EKEXVA
AHU
AHU HEX
VRV I/U
VRV I/U
AHU Air handling unit
AHU HEX Heat exchanger of the air handling unit
EKEA Control box
EKEXVA Expansion valve kit
O/U system Outdoor unit system
VRV I/U VRV indoor unit
11.2 Possible control types
Field-supplied air handling units can be connected with a Daikin
VRV outdoor unit via a control box and expansion valve kit. Each air
handling unit must be connected with at least 1 control box and 1
expansion valve kit (in case of interlaced heat exchanger
applications, multiple control boxes per air handling unit are
possible, see "11.9Master-slave configuration"[415]).
The control box allows regulating the capacity of the air handling unit
in cooling and heating, using 5 possible control types:
Control type Layout
Pair Multi/mix
X control ● —
Control type Layout
Pair Multi/mix
Y control ● —
W control ● —
Z control ● ●
Z' control ● ●
● Applicable
— Not applicable
11.2.1 X control: Operation with 0-10VDC
capacity control
For X control, a controller (field supply) needs to be connected to the
EKEA control box. The controller will generate a 0–10 VDC signal
that will be used by the EKEA control box for the capacity control of
the system.
Contr.
EKEA
0-10 V DC0-10 V DCTT
↓↓
↓
→
↑
↑↑
↓↓
↓
→
↑
↑↑
O/U
Contr. Controller (field supply)
EKEA Control box
O/U Outdoor unit
↑↑, ↑, →, ↓, ↓↓ Capacity request sent to the outdoor unit via F1F2
0-10VDC Voltage signal
T Temperature
The system needs a controller (field supply) with a temperature
sensor. The temperature sensor can be used to control the following
temperatures:
▪ Suction air temperature of the air handling unit
▪ Room air temperature
▪ Discharge air temperature of the air handling unit
Program the controller (field supply) so that it outputs a 0–10VDC
signal based on the temperature difference between the actual
measured temperature and the target temperature.
10 V 10 V
5 V
0 V
V
C
maxmax
V Controller (field supply) voltage output to EKEA
ΔT [actual measured temperature]–[target temperature]
When ΔT=0, the target temperature is reached.
ΔT
max
Maximum temperature variation as defined by the
installation
Recommended value for ΔT
max
=[2°C~5°C].
The voltage output of the controller (field supply) is a linear function
with ΔT:
V=
+5
+
5
max
▪ If ΔT≤–ΔT
max
, the output must be 0V.
▪ If ΔT≥+ΔT
max
, the output must be 10V.
Example
Below an example for cooling and heating operation is given.
▪ ΔT
max
is selected at 3°C.
▪ The target room temperature is 24°C.
Bekijk gratis de handleiding van Daikin EKEXVA400, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Daikin |
| Model | EKEXVA400 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 5715 MB |
