Y-Control; Z-Control - Daikin ERQ Series Service Manual

W-, X-, Y-, Z-Control
2.2.2 Target refrigerant temperature
Example, continued:
3 VDC = level 2, thus meaning an increase of the refrigerant target temperature. In heating
mode, this means T
are in level 3, where T
T
2.3

Y-Control

Control of evaporating and condensing temperature (Te and Tc) by Daikin control (no DDC
needed).
Fixed T
T
e
T
c
Components for control:
++
--
With Y-control, there is no external input to change T
changed by local setup with a Daikin remote controller (during installation). We refer to the
chapter "Field Setting" for further information.
2.4

Z-Control

Control of air temperature (T
Components for control:
++
--
58
0-10V
Control Box
DDC
X-control
+ 1°C. Logically, the room temperature will rise so at the next signal, we
c
is kept even.
c
T < 0 level 1 + level 2
T = 0 level 3
T > 0 level 4 + level 5
= room temp. - set temp.
or T
e c
= user setting: -3 ~ 10°C
= user setting: 43 ~ 49°C
BRC1D (only for servicing)
Low cost
No BRC needed
No air temperature control
Air thermistor (Daikin)
BRC1D (Daikin)
KRP4A (Daikin option, remote on/off)
Low cost
BRC needed
No possibility for T control
d
target temp.
level 1
level 2
level 3
level 4
level 5
Cooling
DDC asks less capacity
no change
DDC asks more capacity
e
or T ) by Daikin control (no DDC needed).
s r
refrigerant
cooling heating
+2 T T
e+2 c+2
+1 T T
e+1 c+1
0 T T
e c
-1 T T
e-1 c-1
-2 T T
e-2 c-2
Heating
DDC asks more capacity
no change
DDC asks less capacity
/T value. Their values can only be
c
Control Box EKEQ - CBV3
ESiEN09-06 A