M01W45H6-06
WSAT-SC
75C-180F
- CONTROL -
34
- CONTROL -
CONTROL INTERFACE
COOL cooling
HEAT heating
ON – ECO – OFF unit
status
enabled timing bands
INLET temperature
alarm
; OK
OUTLET temperature
Number of steps activated in
comparison with the steps
available
ALARM menu access
Current set point
HEAT / COOL changement
SET POINT, TIMING
BANDS, CLOCK access
off = unit OFF
on = unit ON
Stata MENU access
ON / OFF unit
HELP parameter
descriptions
Back to previous shield
Back to main menu
UNIT START-UP
To turn the unit on or off, hold the ON/OFF switch down for a few seconds. When the unit is on, the “ON” message is
displayed; when the unit is off, the “OFF” message is displayed.
It is also possible to access the different menus when the unit is in the “OFF” mode.
It is possible to check the ON/OFF condition at a distance, using a remote device (see the ELECTRICAL
CONNECTIONS chapter).
CHARACTERISTICS
THERMOREGULATION
The thermoregulation is based on the OUTLET temperature.
The unit is dimensioned for a determined TOTAL HEAD between input and output water temperature.
Usually the project step is 5°C; if the value is different, it is necessary reset parameters 37 and 38 (accessible to the
service centre).
In function of the total head, the installation determines the head quote that every resource (compressor, heating
elements) is able to provide: the STEP HEAD.
The control logic insert gradually the resources when the outlet temperature is higher than the set point + the head step.
The resources are activated one at a time and only at the SCAN TIME expiring.
The scan time is not fixed but it changes in function of the margin between the water outlet temperature and the Set point
value. Higher is the margin value (both in positive and in negative) shorter will be the space among the scan points.
The scan time value is visualized at status 6; when the status 7 has reached the status 6 value, the compressor
operating request is activated.
The scan time calculation starts at the same time of the activation of one compressor.
The compressor to activate is chosen to allow the circuit work in parallel and to minimize the wear of the complete
refrigerant circuit and of the single compressor.
At the end of the calculation if the outlet temperature is higher than the step jump, it is inserted another compressor
temp. H2O > set-point + step jump.
SET-POINT COMPENSATIONS
The compensations are evolved functions to protect the compressors and to adapt, as far as possible, the unit operating
to the installation and use characteristics.
The compensations prolong the compressor operating time and limit the start number; to do this they delay the
compressor insertion point adding an offset.
• The compensation on the DURATION is useful when the installation water content is limited.
• The compensation on the CHARGE is useful if the variable charge is present.
Optional components are necessary and for the enabling and configuration it is necessary the parameter modification
with access reserved to the service centres. In industrial applications where is requested a temperature check is possible
to disable the COMPENSATIONS. The STATUS menu displays the compensation value on ext. temp. (status 9) and WR
(status 10).
To Next Page
Loading...
Need help?
General