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Nordmann Engineering AT4 D - Fan Operation Modes and Parameters; Fan Mode and Bathing Behavior Settings; Fan Control Parameters

Nordmann Engineering AT4 D
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29
Adjust the settings for the operation with a supply and an exhaust fan as follows:
• Mode
”: 2-Fan
• WhileBathing
”: Activation mode of the fans in bathing operation
 Off” (both fans remain switched off during bathing operation)
 Supply” (only the supply air fan is running during bathing operation)
 Exhaust” (only the exhaust air fan is running during bathing operation)
 BothFan” (both fans are running during bathing operation)
 Automat.” (during bathing operation both fans are controlled automatically
dependent on the temperature or the humidity in the steam bath cabin)
• While Light
”: If this function is activated (On, factory setting) the exhaust fan starts run-
ning, as soon as light 1 or light 2 is switched on in standby mode. The fan
stops if the light is switched off again.
“Fan In”: Settings for the control of the supply fan.
Note: If the supply fan is controlled with the “RLS” option dependent on the heating voltage
(supply fan is running, when the heating voltage contactor is switched on) all software settings
of the supply fan are without function.
• PrePurgeTime
”: Time in minutes in the heating phase during which the supply fan is
switched on (Factory setting: 2 minutes, Setting range: 0...60 minutes).
• Drying Time”: Time in minutes the supply fan continues to run after the steam bath time
has elapsed to dry the steam bath cabin (Factory setting: 20 minutes,
Setting range: 1...60 minutes).
• Hysteresis
”: Hysteresis value in °C (steam bath operation) or %rh (caldarium opera-
tion) to switch on and off the supply fan (Factory setting: 4 °C/18 %rh,
Setting range: 2...60 °C/6...65 %rh).
Note: in steam bath operation the supply fan switches off if the tempera-
ture or the humidity in the steam bath cabin drops half of the selected
hysteresis value below the set setpoint value, and switches on if the
temperature or the humidity in the steam bath cabin increases half of
the selected hysteresis above the set setpoint value.
“Fan Out”: Settings for the control of the exhaust fan.
• PrePurgeTime”: Time in minutes in the heating phase during which the exhaust fan is
switched on (Factory setting: 2 minutes, Setting range: 0...60 minutes).
• Drying Time”: Time in minutes the exhaust fan continues to run after the steam bath
time has elapsed to dry the steam bath cabin (Factory setting: 20 min-
utes, Setting range: 1...60 minutes).
• Hysteresis
”: Hysteresis value in °C (steam bath operation) or %rh (caldarium opera-
tion) to switch on and off the exhaust fan (Factory setting: 4 °C/18 %rh,
Setting range: 2...60 °C/6...65 %rh).
Note: in steam bath operation the exhaust fan switches off if the tempera-
ture or the humidity in the steam bath cabin drops half of the selected
hysteresis value below the set setpoint value, and switches on if the
temperature or the humidity in the steam bath cabin increases half of
the selected hysteresis above the set setpoint value.

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