Daikin EKEXVA300 handleiding
Handleiding
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11 About the system
Installation and operation manual
13
EKEACBVE + EKEXVA50~500
Option kit for combination of Daikin outdoor units with field-
supplied air handling units
4P724517-1 – 2023.06
11.2.5 Z' control: Discharge air control
Discharge air control is similar to suction air control, but the cooling/
heating load is estimated by the difference between the discharge air
temperature and the setpoint.
The setpoint can be set via field settings on the Daikin remote
controller (see 14(24)–10 and 14(24)–11 in "16.2 Field
settings"[429]).
INFORMATION
Changing the setpoint directly on the Daikin remote
controller will not have effect on the discharge air
temperature setpoint. The only way to change the setpoint
for discharge air control, is using the field setting.
11.3 Operation signals
Input signals:
Signal Description
C1C2: 0-10VDC voltage signal This signal has a different
purpose based on the selected
control type and the choice of the
field settings. See the
explanation of the control types
and to the description of the field
settings.
This signal is used for X and W
control, and it is optional for Z
control.
T1T2: Operation ON/OFF Open: Operation OFF
Closed: Operation ON
T3T4: Cooling/heating Open: Cooling
Closed: Heating
T5T6:
▪ R410A application: AHU fan
malfunction
▪ R32 application: Circulation
airflow malfunction (unsafe
scenario)
Open: Malfunction
Closed: No malfunction
Output signals:
Signal Description
K1K2: Error status EKEA Open: Error
Closed: No error
K3K4: AHU fan instruction Open: No fan instruction
Closed: Fan instruction
K5K6: Compressor operation Open: Compressor is not
operating
Closed: Compressor is operating
K7K8: Defrost operation Open: Not in defrost or oil return
operation
Closed: In defrost or oil return
operation
K9K10: R32 alarm Open: No alarm
Closed: Alarm
T1T2
The reaction of EKEA on the T1T2 input signal can be configured
with field setting 12(22)–1 (see "16.2Field settings"[429]).
T3T4
To use the T3T4 input signal:
▪ See 11(21)–13 in "16.2Field settings"[429].
▪ See "16.1To configure the control box"[427].
▪ When you want to use T3T4 on the EKEA master, this EKEA
master must be set as the cooling/heating master first. See the
user reference guide of the remote controller.
T5T6
In case of R410A applications or R32 applications where no
safety measures are required, the T5T6 input can be short-
circuited with a physical short-circuit bridge, in case the AHU is not
predisposed to use this input.
Note: It is recommended to always use this input to inform the EKEA
control box about AHU fan malfunctions. This increases the reliability
of the entire system.
In case of R32 applications where safety measures are required,
the following applies:
To send the T5T6 safety signal from the AHU controller to the EKEA
control box, a normally open relay must be used.
The AHU controller must be programmed to send the T5T6 safety
signal to the EKEA control box as follows:
▪ Conditions for which the T5T6 input must be opened:
▪ During a failure or a malfunction of the supply air fan.
▪ During a failure or a malfunction of the supply air or return air
isolation dampers.
For the requirement of isolation dampers, see "11.7Air handling
unit"[414].
▪ When the supplied air flow rate is below the minimum required
air flow rate while K3K4 is closed (there is a fan instruction by
EKEA) and during steady operation.
To determine the minimum required air flow rate, see
"12Special requirements for R32 units"[417].
▪ During power failure of the AHU.
A normally open relay is used, so during power failure of the
AHU, the T5T6 input of EKEA will automatically open.
▪ Conditions for which it is not required to open the T5T6 input, and
it is recommended to keep it closed unless one of the above
conditions is met:
▪ During maintenance or service.
▪ When the AHU is not operating.
When the AHU stops operating, the fans will be stopped and
the dampers will be closed. Therefore, the T5T6 input signal
can remain closed.
▪ During transient operation.
When the fans are starting, the airflow rate is allowed to be
below the minimum required limit.
K3K4
There are several ways to configure the AHU fan instruction sent by
EKEA. See 12(22)-3, 12(22)-6, 12(22)-11, 13(23)-2 in "16.2 Field
settings"[429].
NOTICE
When the AHU fan instruction signal is activated, the air
handling unit and fan must operate.
K9K10
To use the K9K10 output signal, see 15(25)-15 in "16.2 Field
settings"[429].
11.4 Remote controller for EKEA
Compatible remote controller
BRC1H or newer.
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Productinformatie
| Merk | Daikin |
| Model | EKEXVA300 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 5715 MB |
