X, Y, Z Control; X-Control - Daikin ERQ Service Manual

ESIE09-05

2. X, Y, Z Control

The D, F, M boxes have different types of control, giving the ability to control different
temperatures (Td, Ts, Tr, Te or Tc).
Schematic:
DDC
Legend:
T
d
T
s
T
r
T
e
T
c
AHU
DDC
EKEQD: Z-control
EKEQF: X, Y-control
EKEQM: Z-control
2.1

X-Control

Control of air temperature (Td, Ts or Tr) by means of an external device (DDC controller, 0-10V
control).
output
10V
5V
0V
T = T
T
measured
Components for control:
++
--
In case of X-control, a DDC-controller is needed to operate the unit. This DDC-controller is field
supply but in order to connect it to our ERQ-system, it is required that it emits a 0-10 VDC signal
towards the control box.
Control Box
Ts
Discharge air control
Suction air control
Room air control
Evaporating temperature control
Condensing temperature control
Air handling unit
Digital controller
T
measured
DDC
T
set
T
set
- T
set measured
= T , T or T
d s r
DDC (field supply)
Air thermistor (field supply)
BRC1D (only for servicing)
Possibility for Td control
Flexibility in applications
Higher cost (DDC needed)
AHU
Te
Td
Tr
ROOM
0~10 V
: http://splitoff.ru/tehn-doc.html

X, Y, Z Control

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