Daikin ERQ Series, Руководство по обслуживанию

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