Initial Commissioning; Adjustment; Functions; Internal Pre-Heater - Helios KWL Yoga 700 Montage- Und Betriebsvorschrift

Installation and Operating Instructions
CHAPTER 6
COMMISSIONING AND

FUNCTIONS

Decentralised ventilation unit – KWL
6 .0

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 pipes.
– 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 .1

Adjustment

Adjustment of flow rate characteristics depending on type with indication of recommended ventilation range:
Dp
fa
Pa
Dp
fa
Pa
6 .2 Functions
The functions depend on the unit series and version. Not all functions may be available.
6 .2 .1 Internal pre-heater (for units with electrical pre-heater)
The pre-heater is positioned behind the intake air filter.
The control is only active to prevent the unit from icing up.
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 .2 .2 Heat exchanger frost protection

The heat exchanger frost protection function consists of 3 steps:
Step 1: Pre-heater control
As soon as the exhaust air temperature (INT-2) falls below 5 °C, the frost monitor will activate. Depending on the speed
at which the exhaust air temperature falls below 5 °C to 3 °C, the pre-heater will be controlled at temperatures below
3 °C accordingly.
® Yoga / KWL
Dp
KWL Yoga 400
fa
Pa
KWL Yoga Style 400
V · m
/h
3
KWL Yoga 1000
KWL Yoga Style 1000
V · m
/h
3
19
® Yoga Style
KWL Yoga Style 700
KWL Yoga 700
V · m
/h
3