Specifications
CONTROL POSSIBILITIES
POSSIBILITY X TD/TR CONTROL:
Air temperature control via an external DDC
controller (eld supplied)
Room temperature is controlled as a function of the air handling unit
suction or discharge air (customer selection). The DDC controller is
translating the temperature difference between set point and air suction
temperature (or air discharge temperature or room temperature) into a
reference voltage (0-10V) which is transferred to the Daikin control box
(EKEQFCBA). This reference voltage will be used as the main input value
for the compressor frequency control.
POSSIBILITY Y TE/TC CONTROL:
By xed evaporating temperature
A fixed target evaporating temperature of between 3°C and 8°C can be
set by the customer. In this case, room temperature is only indirectly
controlled. The cooling load is determined from the actual evaporating
temperature (i.e. load to the heat exchanger). A Daikin wired remote
controller (BRC1D52 or BRC1E52A/B - optional) can be connected for
error indication.
POSSIBILITY Z TS/TR CONTROL:
Using Daikin wired remote controller
(BRC1D52 or BRC1E52A/B - optional)
Set point can be fixed via standard Daikin wired remote controller.
Remote ON/OFF can be achieved by an optional adapter KRP4A51.
No external DDC controller should be connected. The cooling load
is determined from the air suction temperature and set point on the
Daikin controller.
DDC
Ts
TR
Te
AHU
Room
Td
Ts
TR
Te
AHU
Room
Td
Daikin
control box:
EKEQFCB
Daikin
control box:
EKEQFCB
BRC1D52
BRC1E52A/B
BRC1D52
BRC1E52A/B
OPTION KIT FEATURES
Possibility x Field supplied DDC controller is required
Temperature control using air suction or air discharge temperature
Possibility y Using fixed evaporating temperature,
no set point can be set using remote controller
Possibility z EKEQDCB Using Daikin wired remote controller BRC1D52 or BRC1E51A
EKEQMCB* Temperature control using air suction temperature
Ts
TR
Te
AHU
Room
Td
Daikin
control box:
EKEQDCB
EKEQMCB
KRP4A51
ON / OFF
Ts = Air suction temperature
Td = Air discharge temperature
Tr = Room temperature
Te = Evaporating temperature
AHU = Air Handling Unit
DDC = Digital Display Controller
EKEQFCB
* EKEQMCB (for ’multi’ application)
In order to maximise installation exibility, 3 types of control systems are oered:
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