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EN/07.2013/58/98

Visualization on EO3 user

In normal mode is showed a special mask (page 13):

Page 13 - Free air fan status: “FA_XXX” (XXX = % or OFF)

Page 14 - Firmware version and custom: “STUTL2XX_YY_23” (XX_YY = Firmware version)

7.24. Custom 24

Night mode

The parameter involved is:

– M146 ENABLE FREECOOLING IN NIGHT MODE: pre-set = NO

With parameter M146 it’s possible to select if the freecooling is enabled in night mode (M146 set to YES). The cooling

mode is always disabled. If there aren’t the conditions to enable freecooling, the freecooling damper is set to 0 %.

If parameter M146 is set to NO, in night mode the machine goes in stand-by mode.

Heating

The parameters involved are:

– M147 DELAY FOR DISABLE FANS FROM HEATER SWITCH OFF: pre-set = 1 min

– M154 MAXIMUM FANS SPEED IN HEATER MODE: pre-set = 10 %

When the heating is on, the fan speed is equal to the value set by parameter M154 and the damper is closed.

When the heater switches off (TI reaches S03-M64*S07), the fans are switched off after a time equal to the parameter

M147. When the temperature drops or when TI reaches S03-M64*S07, the fans are switched on before the heater.

Dead zone

In dead zone the damper is always closed.

Recirculation

In recirculation mode (S03-M64*S07<TI<S01+M136) the damper is always closed and the fans speed is set equal to

the parameter M88.

Cooling

In cooling mode, the damper is always closed. When the compressor is ON, the fans speed is set to M90; otherwise

when the compressor is OFF the fans speed is set to M88.

Freecooling

The parameters involved are:

– M150 DELAY FOR OPEN DAMPER FROM COMPRESSOR SWITCH OFF: pre-set = 180 sec

– M155 MAXIMUM VALUE FOR FANS IN FREECOOLING: pre-set = 100 %

If it’s not enabled the assisted freecooling, in freecooling mode, when the compressor is on, the damper is always closed

and the fans speed is set to M90. When the compressor switches off, if the ambient conditions allow the freecooling

mode and it’s not enabled the assisted freecooling, the damper remains closed for a period equal to parameter M150.

In freecooling mode, the damper works like in damper mode (M49 set to 0).

Fans speed starts to increase when TI reaches the value: Fans speed ends to increase when TI reaches the value:

TI = S01 + (M31 / 100) * S06 TI = S01 + (M155 / 100) * S06

Auxiliary mode

The parameters involved are:

– M151 EMERGENCY TEMPERATURE: pre-set = 33 °C

– M152 DIFFERENTIAL TEMPERATURE IN EMERGENCY MODE: pre-set = 1 °C

Stulz C2020 User Manual

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