Zehnder Rittling ComfoSpot 50, Operating And Installation Instructions

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EN 11
Automatic operating mode
Automatic operating mode requires an internal installation and configuration of a sensor module! The
sensor modules inserted in the extract air section of the ventilation unit are available as optional
accessories.
The Automatic function changes into the frost protection operating mode in the event of frost protection
criteria being met!
The application of the Automatic function follows the logic of a demand controlled system for optimizing the indoor air
quality. Consequently, an optimized response is achieved and mildew formation is prevented, which ultimately also leads
to an increase in energy savings.
The ComfoSpot 50 ventilation unit with a sensor module is classified in energy efficiency class A.
2.3.1.1 Functional principle of HUMIDITY sensor
The HUMIDITY sensor module is primarily supposed to be installed in units for the ventilation of rooms
with an increased occurrence of humidity.
The HUMIDITY sensor module is equipped with a humidity and temperature sensor and calculates the relative humidity.
In the evaluation of the current sensor signal for the setpoint selection, the fans are regulated in accordance with the
characteristic curve in diagram 1. Since the dehumidification performance decreases the smaller the temperature
difference between indoor and outdoor air, at a difference of
Δ
T < 5 K the air volume is reduced to 20 m³/h. When the
Bathroom function operating mode is active, the unit will be operated with the highest fan speed if the relative humidity
amounts to 80% or more.
LED4 flashes in
alternation with the
current fan speed
Supply air mode Pressing the (+) button for 5 seconds in operating modes FS1 to FS4
activates or deactivates the Supply air mode. The extract air fan is
switched off; the supply air fan continues to run with the current fan speed.
If the outdoor temperature falls below 13 °C, the extract air fan will be
activated.
The display for the current fan speed alternates every 2 seconds with the
flashing LED4.
Flashing of most
recently active fan
speed when supply
air fan is switched
off
(Display of LED1-3
as example)
Frost protection
mode A temperature threshold, which activates its own frost protection routine if
not reached, is stored for each fan speed. The fan speed of the supply air
will be regulated linearly between the minimum and maximum set point
when the outside temperature is dropping. The fan speed can still be
changed.
The supply air fan is deactivated if a second temperature threshold is not
reached.
If the outside temperature falls below the temperature limit threshold of -15 °C,
the extract air fan will also be deactivated and the unit switched off.
After the unit is switched off, a flashing in those LEDs (by touching the (-)
or (+) button) which denoted the most recently active fan speed will be
signalled. The fan speed cannot be changed and is signalled with the
flashing of Fault LED.
Fault LED flashes
Indication of
locked modes If an inaccessible operating mode is selected, it will be signalled by the
flashing of Fault LED.
These operating modes are the locked standby, locked supply and extract
air mode and complete switch-off due to frost protection.
LED Filter
replacement flashes
Indication of filter
inspection The filters are monitored based on running time. 90 days are preset by
default.
After the filter runtime has elapsed, notification in regard of a filter
inspection is signalled by the filter replacement LED flashing.
Simultaneously pressing the (-) and (+) button for 3 seconds allows you to
acknowledge the indication of the filter inspection and to reset the filter
runtime.
Fault LED lights up
Error code LED1-4
Signalling of error
code fault
message If an error occurs, this is signalled by the fault LED.
Faults that can be diagnosed by the unit are symbolized by LED1-4 using
an error code (see 3.4.1).
Simultaneously pressing the (-) and (+) button for 3 seconds allows you to
delete the indication of the fault notification.