NOTE:
– For colder outside temperatures (Lo_A), the value Lo_Ti must be higher that the value Hi_Ti, as hotter
water is required.
– With warmer outside temperatures (Hi_A) the value Hi_Ti must be lower that the value Lo_Ti, as less hot
water is required.
T
∆
Hi_A Highest ambient temperature
Hi_Ti Set value at highest ambient
temperature
Lo_A Lowest ambient temperature
Lo_Ti Set value at lowest ambient
temperature
T
t
Target water temperature
T
A
Ambient temperature (outside air)
Δ
T
Adjustment value
Fig. 4-2
View of the control system with active "Weather-dependent set value regulation"
4
x
Parameter settings
36
FA ROTEX HPSU compact 308 - 02/2012
[2] - Anti-legionella system
If no hot water is used for several days and the storage temperature of the HPSU compact does not reach at least 60 °C, for
hygiene reasons (Legionella protection) it is periodically heated up to above 60 °C once.
WARNING!
The settings of the function "Anti-legionella system" must always be configured in accordance with the coun-
try-specific laws.
The following setting options are available:
– [2-00] Operating interval: Day(s) of the week on which the "Legionella protection" function should be started.
– [2-01] Status: 0 = Function "Anti-legionella system" is switched off, 1 = Function "Anti-legionella system" is switched on.
– [2-02] Starting time: Starting time, the day on which the function "Anti-legionella system" is started.
– [2-03] Target value: Disinfection temperature to be reached.
– [2-04] Holding time: Length of time the disinfection temperature must be maintained.
t
Time
T
DHW
Hot water temperature
T
H
Disinfection temperature [2-03]
T
U
Target temperature for hot water (as set on main control
unit (HPR1))
Fig. 4-3
View of the control system with active "Anti-legionella system"
