26 WSAT-XIN
21-171
M0Q940G14-03
7.12 Water set point compensation with external temperature
It is possible to automatically change the set-point according to the outside temperature.
Keys
Esc
+ Set
Menu
dS
dS00
Enable the function:
Par: dS00 set-point compensation of the outside temp.
0 = Disabled
1 = Proportional
2 = Fixed (by step)
With low ext. temperature the refrigerant requirements are reduced.
The internal comfort can also be obtained with a set-point higher than standard.
Example:
setpoint = 10°C
compensated setpoint = 14°C
Cool
Description
Example
dS01
Temperature controller dynamic differential proportional band in Cool
dS01 = - 6°C
dS03
Maximum temperature controller dynamic differential in Cool
dS03 = 4°C
dS05
Temperature controller dynamic differential setpoint in Cool
dS05 = 36°C
7.13 Minimum pump speed setting
Only for units fitted with an EC circulator.
The flow switch must not be tripped with the circulator at minimum speed and the system under the maximum pressure drop conditions.
Inspection and setting procedure:
Parameter modification
Keys
Esc
+
Set
Menu
dS
Menu
PI
1. note down the PI31 value
2. set par. PI31=PI30
3. note down the PI41 value
4. set par. PI41=PI40
5. if the E020 alarm appears, proceed from section 8
6. if the E020 alarm does not appear, proceed from section 10
7. reset the alarm
8. increase PI30 and PI31 by the same value
9. repeat the step on PI40 and PI41 with the unit in heating mode
10. set PI31 back to the initial value
11. set PI41 back to the initial value
On systems with low pressure drops, the default settings of PI30 and PI40 can be decreased
PI30
Minimum water pump speed in Cool mode
PI31
Maximum water pump speed in Cool mode
