Daikin ERQ Service Manual page 77

Operation with 0–10 V capacity control
The 0–10 V input is only used for this system of operation and is the
base of the capacity control.
This system needs a field supplied controller with a temperature
sensor. The temperature sensor can be used to control any
temperature:
■ Suction air of the air handling unit
■
Room air
■
Discharge air of the air handling unit
Program the field supplied controller to generate a 0–10 V signal
within conditions as listed. Also refer to the graphic and further data
in this paragraph for more details.
■ When target temperature is reached: 5 V
■ When lower refrigerant temperature is needed: 5–10 V
■
When higher refrigerant temperature is needed: 0–5 V
°C
+ΔT max
ΔT=0
–ΔT max
0
A Controller voltage output to EKEQFCB
Capacity increase area
Capacity decrease area
Voltage output = linear function with ΔT
ΔT = [actual measured temperature] – [target temperature]
When ΔT=0, the target temperature is reached.
ΔT = maximum temperature variation as defined by installation
max
Recommended value for ΔT
ΔT (°C)
Voltage output from controller
(field supply)
EKEQFCBV3 + EKEQDCBV3
Option kit for combination of Daikin condensing units
with field supplied air handling units
4PW52446-1
A
5 10 V
=[1°C~5°C].
max
–ΔT +ΔT
0
max max
0 V 5 V 10 V
Operation with fixed T /T temperature control
e c
The evaporating temperature (
which the application has to operate can be set by code numbers as
listed below.
Mode No. Code No.
01
02
03
04
13(23)–1
05
06
07
08
01
02
03
13(23)–2 04
05
06
07
(*) Depending on the operating temperature condition or on selection of the air
handling unit, operation or safety activation of the outdoor unit may take priority
and actual T /T will be different from the set T
e c
Operation setting in case of power failure
Measures must be taken to ensure that after power failure,
T1/T2 is according to the setting of your preference.
Neglecting this caution will result in improper operation.
Mode No. Code No.
01
12(22)–5
02
(*) After power failure, T1/T2 must be changed to open (no cooling/heating
requested).
: http://splitoff.ru/tehn-doc.html
)/condensing temperature (
T T
e c
(*)
Description of setting
T = 3°C
e
T = 4°C
e
T = 5°C
e
T = 6°C (factory setting)
e
T = 7°C
e
T = 8°C
e
T = 9°C
e
T = 10°C
e
T = 43°C
c
T = 44°C
c
T = 45°C
c
T = 46°C (factory setting)
c
T = 47°C
c
T = 48°C
c
T = 49°C
c
/T .
e c
Description of setting
T1/T2 must be open at power
(*)
restore.
After power failure, the status of
T1/T2 must remain identical to the
initial T1/T2 status prior to the power
failure.
Installation and operation manual
) at
67