Stulz S-Klima C7000 - Page 24

BA C7000 for EC Tower | EN | 01-2019 | 1000755
24
5 min.
S
fix
dS
S
var
Config
Values
Air/temperature
It is possible to have a standby unit start when an adjustable positive temperature dif-
ference to the air temperature setpoint is reached. This temperature difference can be
adjusted by the “Load start” parameter ➌. The adjustment 0.0K deselects this function.
When the temperature difference is reached, the unit starts as long as it is defined as a
standby unit. The sequencing is not influenced by this.
In order to use this function, a zone must be defined.
You can determine an integral part ➍ for the air temperature control to avoid a control
discrepancy which is characteristic for P-controllers. In this case, the variable setpoint
Svar, which is recalculated every 5 minutes according to an integration interval, is deci-
sive for the control. This variable setpoint is created by adding a setpoint alteration dS
to the previous setpoint.
The values for the integration factor can be between 0 and 10 %. In principle, you should
start at a low value in order to prevent the system from oscillating because of a value that
is too large. 2 % is recommended and is increased slowly until the system is regulated.
You can adjust the following for the “Room temperature too low ➎/too high ➏” and “Supply
air temperature too low ➐/too high ➑” limit value alarms:
a. Common alarm actuation (1 = yes).
b. Alarm priority
Actual value
Time
Svar
n+1
= Svar
n
+ dS with
dS = (Sfix - Actual value) x Integration factor
sfix represents the fixed setpoint that is
set in the Config/Values/Air/Tempera-
ture menu.
Air/humidity
A standby unit can be started when an adjustable negative humidity difference to the air
humidity setpoint is reached. This humidity difference can be adjusted using the “Load
start” parameter ➌. The adjustment 0.0 % deactivates this function.
A standby unit can be also started when an adjustable positive humidity difference to
the air humidity setpoint is reached. This humidity difference can be adjusted using the
“Dehumidification load start” parameter ➍.
When the humidity difference is reached, the unit starts as long as it is defined as a
standby unit. The sequencing is not influenced by this.
You can adjust the following for the “Room humidity too low ➎/too high ➏” and “Supply
air humidity too low ➐/too high ➑” limit value alarms:
a. Common alarm actuation (1 = yes).
b. Alarm priority
➎
➏
➐
➑
➎
➏
➐
➑
➌
➍
➎
➏
➌
➍