Stulz C7000 - Page 96

96
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1K
T/°C
➀
➁
➂
➃
➄
EN/06.2019/G57 © STULZ GmbH – all rights reserved
C7000 INSTRUCTIONS fOR A/C UNITS
The corresponding commands:
Dehumidif. -Stop
Deh.
ON
OFF
Temp.
setpoint
Components/Humidity
Dehumidification
The first three parameters are irrelevant for units of the CyberAir2/3 series.
For these units the parameter "VALVE" must be set "0".
Other units (CyberAir 1, Compact DX, Mini-Space) can contain a dehumidifica-
tion valve and a mechanically controlled HGBP valve incl. solenoid valve.
By setting the parameter "VALVE" on 1 you add a dehumidification valve to the
configuration. With "0" you disable the dehumidification valve.
➀
In the second line you can configure a hotgas bypass for the compressor by
entering a "1".
➁
When dehumidification with compressor operation is requested, the solenoid
valve in the hotgas bypass line is closed, because the maximum refrigerant
mass flow is needed for the effect of passing under the dew point.
This is also valid for dehumidification by compressor operation with fan speed
reduction.
With the parameter "DOUT" you determine a digital output for the dehumidifi-
cation (solenoid valve for partial evaporator cut-off).
➂
By the next parameter ➃ you can set the humidity control: "relative", "dewpoint"
or "specific". Dewpoint control is described in detail on the following page.
The following menu item is only relevant for dehumidification by relative
humidity.
Here you can adjust a stop temperature
➄, which is entered as a negative dif-
ference to the air temperature setpoint and avoids dehumidification when it is
passed under.
By this, you avoid a feedback circle of dehumidification and cooling, where the
sinking temperature produces an increased relative humidity which entails a
new dehumidification request. With a fixed hysteresis of 1 Kelvin the dehumidi-
fication is switched on again, when the room temperature rises above the stop
temperature.
Type 0: dehumidification by relative humidity
Type 1: dew point control
Type 2: dehumidification by specific humidity
dehumi confvalve 1
dehumi confbypass 1
dehumi dout 12
dehumi type 0
dehumi stop 2.0
Config