Frost-Protection Hot Water Heater Battery; Thermal Comfort Temperature; Back-Draught Shutters; Run Output - Helios EC green Vent KWL EC 700 D Pro / WW Notice De Montage Et D'entretien

Installation and Operating Instructions
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IMPORTANT NOTE
Central ventilation units KWL EC.. D Pro/WW

3.2.6 Thermal comfort temperature

Condition I: Supply air temp. (sensor EXT3) lower than +16.5 °C
Condition II: Outside air temp. (sensor EXT1) lower than -10 °C
If both conditions are fulfilled, the pre-heater will be controlled corresponding to the difference to achieve a constant
supply air temperature.
3.2.7 Back-draught shutters, 230 V~ for outside air and outgoing air (to be provided on site)
The back-draught shutters which are to be provided on site prevent cold draughts in case of faults or when the unit is
switched off.
Faults include:

- Frost-protection Hot water heater battery

- Frost-protection Heat exchanger (step 3)
A back-draught shutter must be mounted in the outside and exhaust air for the KWL EC .. PRO WW (internal
hot water heater) to prevent frost damage to the heater or heat exchanger.

3.2.8 RUN output

The RUN output can, for example, serve as a signal for building control systems to determine the system status. A relay
output is located on the unit (label: "RUN") and as soon as the KWL unit is in ventilation mode, the contact is closed.
3.2.9 External contact (signal)
The KWL unit can be put into standby mode or ventilation mode through the "External contact" function.
– Contact open = Standby mode
– Contact closed = Ventilation mode
If the KWL unit is switched to ventilation mode via the controller > Service menu 10: "Ext. sensor" (see also Page 20),
the external contact must first be closed and then opened to put the KWL into standby mode. This is also the case if
the KWL unit has been put into standby mode via the controller. The external contact must first be opened and then
closed to put the KWL into ventilation mode.
3.2.10 Fire mode (fire contact)
The KWL unit can be put into two operating modes (extract air mode or standby mode) through the "Fire mode" func-
tion (Fire contact):
– "Unit off" (Standby)
– "Extract air"
These modes can be selected from the controller > Service menu 14: "Fire mode" (see also Page 21). If the fire contact
is opened, the previously selected operating mode will be activated.
The controller will be locked during this time.

3.2.11 Condensate contact

Condensate contact is an error message "condensation tub overflow" on the controller. The fans will be shut
down. Function is not required!

3.2.12 Monozone "manual"

"Monozone" / "CAV" = Operate the ventilation unit in constant airflow mode.
This function can be selected on the controller > Service menu 1: "Ventilation mode" (see also Page 18).
If it is necessary to operate the ventilation unit at a desired flow rate, the operating mode "Monozone" / "CAV" is recom-
mended. The desired flow rate is then set directly on the main menu by pressing the "Flow rate value" on the display.

3.2.13 Monozone "auto"

The ventilation unit can also be operated in Automatic mode "Monozone" / "CAV"-mode.
- Condition: Sensor must be activated (Service menu 10).
Automatic mode can be selected on the controller > Service menu 1: "Ventilation mode" (see also Page 18).
Press "M" key. The unit will switch to Automatic mode which is indicated with an "A". Depending on the connected
and activated sensors, it is also possible to enter a "limit value (ppm)" for the respective sensors. When the limit value is
reached, the ventilation unit will operate at the max. power available.
The ventilation unit therefore increases or decreases the flow rate capacity before reaching the limit value depending
on the target/limit value comparison. Pressing the "A" symbol again switches the unit back to the "manual" ventilation
mode ("M" symbol).
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