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HEAT RECOVERY UNIT
Dimensions
Control unit - accessory
Microprocessor control unit with display for adjusting and displaying the individual
control functions:
- Set value adjustment of the ventilation and extract air flow rate
- Fans ON / OFF
- Programmable pressure compensation or pressure balancing - i.e. generally over or
underpressure can be created deliberately via an adjustable value, if required, inside the
accommodation.
- Filter alarm on the display (filter service)
- Frost protection
- Control of a pre-heater bank (1000 W). The pre-heater bank is designed to maintain a
ventilation air temperature above 0 °C.
- Control of a bypass damper (if installed) for models CWL-300 and CWL-400. This enables
the supply of fresh outside air into the accommodation for night time cooling.
The bypass damper opens if the room temperature exceeds an adjustable value, and the
outside air temperature is below that value.
- Displaying the selected values
Controller
User interface
Additional PCB with switching inputs for:
- Smoke detector - this shuts down the fans in dangerous situations
- Humidity sensor - ensures a larger amount of air is extracted automatically in case of
excessive relative humidity (e.g. in the bathroom) (extraction)
- Carbon dioxide sensor - ensures a larger amount of ventilation air is supplied automatically
in case of excessive CO2 content (e.g. in the living room) (ventilation)
- Control of a booster heater bank (1000 W) - the booster heater bank heats the ventilation
air to an adjustable value
Accessories
Auxiliary PCB
Three-stage switch with LED
This illuminates when the filters need cleaning.
Position 1: Minimum ventilation, e.g. during absence (holiday)
Position 2: Basic ventilation
Corresponds to standard operation when the occupants are away
Position 3: Intensive ventilation, e.g. during a party, when there are visitors
(high oxygen consumption)
Three-stage switch
Wireless remote control with transmitter and receiver
Press at the top left
Fans turn at stage 1 (minimum ventilation)
Press at the bottom left
Fans turn at stage 2 (basic ventilation)
Press at the top right
Fans turn at stage 3 (intensive ventilation)
Press briefly at bottom right
Fans turn at stage 3 for 15 min.; then
(< 1 s)
the fans revert to stage 1
Press longer at bottom right
Fans turn at stage 3 for 30 min.; then
the fans revert to stage 1
Remote control
Solar Brochure EXTRA:Layout 1 19/02/2010 13:10 Page 259