Daikin EWWQ-KC, Руководство по эксплуатации

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The path in the HMI Web interface to set the desired strategy is
“ Main Menu à Commission Unit à Configuration à
Options ”
and modify the Setpoint Reset parameter.
Parameter Range Description
LWT Reset
No Setpoint reset not enabled
0-10V Setpoint reset enabled by an external signal between 0 and 10V
DT Setpoint reset enabled by Evaporator Water Temperature
Each strategy needs to be configured (although a default configuration is available) and its parameters can be set navigating to
“ Main Menu à View/Set Unit à Power Conservation à Setpoint Reset ”
in the HMI Web interface .
WARNING Note that the parameters corresponding to a specific strategy will be available only once the
Setpoint Reset has been set to a specific value and the UC has been restarted.
3.11.1.1. Setpoint Reset by 0-10V signal
When the 0-10V is selected as Setpoint Reset option, the LWT active setpoint(AS) is calculated applying a correction based on
an external 0-10V signal: 0 V corresponds to 0°C correction, i.e. AS = LWT setpoint, whereas 10 V corresponds to a correction of
the Max Reset (MR) quantity, i.e. AS = LWT se MR(-MR) as shown in the following picture:
Graph 2
– External signal 0-10V vs Active Setpoint - Cooling mode(left)/ Heating mode(right)
Several parameters can be configured, and they are accessible from the
Setpoint Reset
menu, go to the parameter group
number [16] “Setpoint Reset”, according to the following table:
Menu Parameter Range Description R/W
20 01
(
Max Reset
)
0..10 [°C] Max Reset setpoint. It represents the maximum temperature variation that the
selection of the Setpoint Reset logic can cause on the LWT. W
3.11.1.2. Setpoint Reset by DT
When the DT is selected as Setpoint Reset option, the LWT active setpoint(AS) is calculated applying a correction based on the
temperature difference ΔT between the leaving water temperature(LWT) and the evaporator entering(returning) water temperature
(EWT). When the |ΔT| becomes smaller than the Start Reset ΔT setpoint(SRΔT), the LWT active setpoint is proportionally
increased (if Cooling mode set) or decreased (if Heating mode is set) of a maximum value equal to the Max Reset(MR) parameter.
Graph 3
– Evap ∆T vs Active Setpoint - Cooling mode(left)/ Heating mode(right)
Several parameters can be configured, and they are accessible from the
Setpoint Reset
menu, as shown below: