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Verfügbare Sprachen
Verfügbare Sprachen
Installation and Operating Instructions
EN
CHAPTER 6
COMMISSIONING AND
FUNCTIONS
Decentralised ventilation unit – KWL
6�1 Initial commissioning
The following points must be checked prior to initial commissioning:
– Is the system correctly connected and are all connectors correctly connected to the intake/exhaust air.
– Does the electrical connection correspond to the wiring diagram.
– Are all electrical components correctly connected.
– Is the condensate drain properly connected.
– Does the installation correspond to all instructions in this installation and operating instruction manual.
– Have no tools or objects been forgotten in the unit.
– Are the filters clean
6�2 Adjustment
Adjustment of flow rate characteristics depending on type with indication of recommended ventilation range:
Dp
KWL Yoga Style 400 / KWL Yoga Style 400 ET
fa
Pa
700
600
500
400
300
200
100
0
0
100
200
Dp
KWL Yoga Style 1000 / KWL Yoga 1000 ET
fa
Pa
800
600
400
200
0
0
200
400
600
800 1000 1200 1400 1600
6�3 Functions
6�3�1 Internal pre-heater (depending on unit version)
The pre-heater is positioned behind the intake air filter.
The control serves to protect the unit against frost.
Important note:
The pre-heater only activates if the supply air ventilator is extracting the minimum flow rate and there are no errors. If the
unit is switched to standby mode, the supply air fan overrun timer will run for 60 seconds (if the pre-heater was
activated before that). If the pre-heater is deactivated before and e.g. the unit switches to standby mode 20 seconds
later, the supply air fan overrun timer will only run for 40 seconds.
General information on the pre-heater
The pre-heater is equipped with two safety temperature limiters (STL) (Auto reset = trigger temperature +50 °C and
Manual reset = trigger temperature +115 °C), which are connected in series. Once a safety temperature limiter is trigge-
red, the preheater will be disconnected from the power supply and an error will be displayed on the controller.
6�3�2 Heat exchanger frost protection
The heat exchanger frost protection function consists of 3 steps:
Step 1: Pre-heater control
®
Yoga Style/KWL
Dp
Pa
300
400
500
600
V · m
/h
3
V · m
/h
3
15
®
Yoga Style ET
KWL Yoga Style 700 / KWL Yoga Style 700 ET
fa
600
500
400
300
200
100
0
0
200
400
600
800
1000
V · m
/h
3
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