Stulz S-Klima C7000 User Manual page 50

Backup operation
It is possible to set a backup operation using the parameter in the second line of
the Z1 menu. If this parameter is set to "0", the backup operation is deactivated.
(Z1)
Using this parameter you can adjust the number of defective units that leads
to the backup operation being introduced.
During backup operation, all units of an IO bus take on the zone-specific emer-
gency temperature as the setpoint. The emergency temperature is adjusted per
zone by means of the parameter in the third line of the Z1 menu.
Function of the standby units
The failed units are registered as defective units even if the failed unit capacity
of a zone is completely compensated for by the standby units being started.
In order for a backup operation to start once the full function unit capacity of a
zone is no longer reached, the set number of defective units should be higher
than the number of a standby units in a zone.
Config/Values/Air/Temperature (T)
Additional capacity - Cooling (previously: temperature)
It is possible to have a standby unit start when the air temperature setpoint is
exceeded by the zone temperature (average value or unit temperature, if the
average value calculation is deactivated).
The setpoint exceedance can be set as a temperature difference using the
parameter in the third line of the T menu. The setting "0" deactivates the addi-
tional capacity function.
When the temperature drops, the additional capacity unit is switched off with
a hysteresis of 1K.
Additional capacity - Humidification (previously: humidity)
Config/Values/Air/Humidity (H)
A standby unit can be started when the zone humidity (average value or unit
humidity, if the average value calculation is deactivated) falls short of the air
humidity setpoint.
The setpoint shortfall can be set as a humidity difference using the parameter in
the third line of the H menu. The setting "0" deactivates the additional capacity
function.
When the humidity rises, the additional capacity unit is switched off with a
hysteresis of 3 % rel. h.
Additional capacity - Dehumidification
A standby unit can be started when the zone humidity (average value or unit
humidity, if the average value calculation is deactivated) exceeds the air hu-
midity setpoint.
The setpoint exceedance can be set as a humidity difference. The setting "0"
deactivates the additional capacity function.
When the humidity lowers, the additional capacity unit is switched off with a
hysteresis of 3 % rel. h.
Prerequisite:
The additional capacity unit must be defined as a standby unit and allocated to
a zone. Furthermore, the corresponding (temperature or humidity) "load start"
parameter must include a value different from "0".
BA C7000 for EC Tower | EN | 01-2019 | 1000755
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