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

ESiEN09-06 A

2. W-, X-, Y-, Z-Control

The D, F, M boxes have different types of control, giving the ability to control different
temperatures (T
Schematic:
DDC
Legend:
T
T
T
T
T
AHU
DDC
EKEQD: Z-control
EKEQF: W-, X-, Y-control
EKEQM: Z-control
2.1

W-Control

Control of capacity by means of an external device (DDC-controller, 0-10 V control).
Legend:
1
2
3
Components for control:
++
--
In case of W-control, a DDC-controller is required 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 EKEQ - CBV3
, T , T , T
d s r e
Ts
Discharge air control
d
Suction air control
s
Room air control
r
Evaporating temperature control
e
Condensing temperature control
c
Air handling unit
Digital controller
Field-supplied controller
Control box EKEQF
Level 1 ~ 5 for capacity control
DDC-controller (field supply)
Air thermistor (field supply)
BRC1D/E (only for service)
Possibility for T , T
d s
Flexibility in applications
Higher cost (DDC controller required)
or T ).
c
AHU
Te
Tr
ROOM
or T control
r

W-, X-, Y-, Z-Control

Td
55