HWA1-A
Air/water chillers with axial fans
9
•
b07
=
integral time
•
HzMin
= Minimum frequency of operation derived from the algorithms of limitation
•
HzMaxReg =
Maximum working frequency of the compressor in cooling mode
The various characteristics are represented in the below table:
Step 1
Step 2
Step 2
Number of compressors
Off
On
Off
On
Off
On
1
Set + b05
Set
–
b25
2
Set + b05
Set
–
b25 Set
–
b25
Set
–
b25 - b01
3
Set + b05
Set
–
b25
Set - b25
Set - b25 - (b01/2)
Set - b25 - (b01/2)
Set - b25 - b01
6.3
Domestic hot water mode
In sanitary mode, the maximum power is employed (like when the thermoregulator is always requiring 100% of capacity).
However, the various limitations of the maximum frequency associated to the envelope and the limitation for maximum electrical
absorption are active.
6.4
Safe time periods
The compressors will respect the minimum waiting time for the on or off events (regardless of the configuration and if are
inverters or ON/OFF type)
C01
= Minimum Off time of a compressor.
C02
= Minimum time between two start-up of the same compressor.
C03
= Minimum delay time between a compressor switch-on and switch-on of the next one.
C04
= Minimum delay time between a compressor shutdown and shutdown of the next one.
6.5
Deactivation of compressors for outdoor temperature
If the outdoor temperature sensor is configured and is not in trouble, so the compressors cannot work because of low outdoor
temperature. The function is enabled if:
•
Outdoor temperature sensor integrated and operating.
•
Parameter
Pa r07
= 1.
7
DYNAMIC SET-POINT CONTROL
The controller allows change the set-point by adding a value depending on the temperature of the outdoor air sensor. This
function can be used if necessary by modify the parameter values, following the below information (
it is the installer’s
responsibility to change the parameters).
b08
active = 1/not active = 0 dynamic set-point (in the case of using of the optional
“Hi
-
T” remote control panel for climatic
compensation, b08 must be deactivated).
b09
= Maximum offset in cooling.
b11
= Set outdoor temperature in cooling.
b13
=
ΔT
in cooling.
Set-point modification as a function of the outdoor temperature:
7.1
Set-point adjustment from 0-10v input
If the analog input 0-10Volt/raziometric is configured (
H12-H30 = 40
), then the value read from the sensor in matter is used to
adjust the setpoint as follows:
•
The entity of calibration is given by
B15
.
•
Se
B20
= 0 Enablement of 0
–
10 Volt input type
•
Se
B20
= 1 Enablement of ratiometric input type
Cooling
Summary of Contents for HWA1-A 0140
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