short description

Product description

Bypass model

• Bypass model with preheating register, bypass, sound-optimised housing, with additional insulation and cross-counterflow heat exchanger.
• Unit in left-hand version.
• ISO Coarse 80 % (G4) filter in the exhaust air and ISO ePM1 55 % (F7) pollen filter in the outside air.
• Patented automatic 100% bypass for passive summer night cooling with adjustable minimum supply air temperature limit.

Brief description

• Central, compact, very quiet domestic ventilation unit with heat recovery.
• For controlled ventilation and air extraction.
• Highly efficient ventilation unit achieves energy efficiency class A.
• Especially suitable for modern new buildings or redevelopments (e.g. flats).
• The narrow ventilation unit (width: 59.5 cm) is also particularly predestined for kitchen installation.
• KfW and NRW subsidies are available.
• Easy, very time-saving installation with the wall bracket included in the scope of delivery.
• A filter cascade (ISO Coarse 80 % (G4) / ISO ePM1 55 % (F7)) in the outside air is possible to increase the filter service life.
• All units are equipped with state-of-the-art cross-counterflow heat exchangers or enthalpy heat exchangers with hygiene certificates according to VDI 6022, sheet 1.
• Complete separation of exhaust air/supply air ducts throughout the unit. This prevents unwanted recirculation of air. Viruses (e.g. Corona virus) and bacteria are therefore not transmitted.
• RLS 1 WR room air control system included in the scope of delivery.
• All domestic ventilation units can be controlled via the APP (Maico@home).
• USB connection as a standard feature for commissioning, control system update and service.
• All units are equipped with highly energy-efficient fans with EC technology.
• The integrated/automatic constant volumetric flow control ensures permanent compliance with the set volumetric flow under all operating conditions (e.g. filter contamination, air valve settings). This also results in easier commissioning/air volume measurement at the valves.
• Combination sensor (humidity/temperature) integrated as standard in the exhaust air enables demand-driven ventilation operation as well as an intelligent frost protection and dehumidification strategy (excess humidity protection).
• All units are characterized by a frost protection strategy adapted to the real demand.
• Two input contacts (12 V and 230 V) are available for, e.g., safety shutdown.
• Various inputs/outputs enable a control connection to other building service installations, e.g., the heat pump.
• Integrated MODBUS interface (TCP/IP and RTU) enables integration in the building control system.
• The optional K-SM plug-in module enables integration into KNX building control systems.
• The optional E-SM plug-in module enables integration into EnOcean systems.
• Optional additional circuit boards ZP 1 and ZP 2 for expansion functions such as “pressure constancy control” of the EC fans, zone shutter, brine earth heat exchanger (regulated pump), filter differential pressure measurement.
• Maximum unit flexibility thanks to a wide range of equipment/connection options
• Modern unit module technology allows easy retrofitting (e.g. pre-heating, bypass) as well as high user-friendliness for service and maintenance.

Housing

• Powder-coated sheet steel housing.
• Colour: traffic white, similar to RAL 9016.
• Sound-optimised housing with additional insulation for units with bypass “B”.
• Simple filter change is possible without tools.
• Housing lid can be folded up using quick-release locks.
• Tight, thermal bridge-free inner housing made of temperature-resistant, sound-absorbing and heat-insulating EPP material (average wall thickness 42 mm).
• EPP housing with very good hygienic/non-hygroscopic properties.
• Material checked by the Institute for Air Hygiene in accordance with VDI 6022.
• Condensate tank integrated in EPP housing.
• Unit surface and unit’s inner housing are easy to clean.
• Condensate drain (3/4" hose connection or drain pipe with a diameter of 28 mm) at the bottom of the unit.
• Connection to a siphon.

Filter:

• The WS 170 R/L and WS 170 RET/LET units use ISO Coarse 80 % (G4) filters in the exhaust air and outside air.
• For the WS 170 KR/KL, WS 170 KRET/KLET, WS 170 KBR/KBL, WS 170 KBRET/KBLET units ISO Coarse 80% (G4) filter in the exhaust air and ISO ePM1 55 % filter (F7) pollen filter in the outside air.
• Optional filter cascade (ISO Coarse 80 % (G4) / ISO ePM1 55 % (F7)) in the outside air possible to increase the filter service life.
• Filter exchange without tools.

Operation

• Ready for service with on/off switch.
• RLS 1 WR control panel included in the scope of delivery, 4 air levels, filter change indicator, fault display.
• Other control panels can be connected in parallel.
• Mobile operation via APP (Maico@home).
• Demand-driven automatic operation / time-controlled automatic operation
• Manual operation / OFF
• ECO mode supply air or ECO mode exhaust air
• Filter queries, error messages
• Optional RLS T2 WS touchscreen control panel for the setting of:
• 2 automatic operating modes (Auto Sensor / Auto Time)
• 4 manual operating modes (ECO exhaust air / ECO supply air / MANUAL / OFF)
• Complete commissioning of the heat recovery units possible
• Optional RLS G1 WS design control panel:
• ON/OFF
• 5 levels
• Automatic operation
• ECO supply air, ECO exhaust air
• Filter change and fault display
• USB connection for service/commissioning – free MAICO commissioning software.
• Network integration via integrated LAN interface.
• Smart-Home ready (e.g. Loxone via Modbus TCP/IP).
• Modbus TCP/IP and RTU integrated as a standard feature.
• Optional KNX plug-in module K-SM for integration into building control system, www.knx.org.
• Optional EnOcean plug-in module E-SM for integrating the unit into the “EnOcean world”, www.enocean-alliance.org.

Control system

• Standard demand-driven volumetric flow regulation (“decisive humidity value”).
• Continuously variable demand-driven adaptation of air volumes.
• Integrated excess humidity protection function.
• 3 temperature sensors in outside, outgoing and supply air.
• 1 combination sensor (temperature and humidity) in exhaust air socket.
• Up to four external sensors of different types (CO2, VOC, humidity) can be connected.
• Inputs for safety shutdown via 12V contact or 230V contact (e.g. smoke detector, fire alarm, differential pressureless fireplace).
• Additional pushbutton input for triggering time-limited intensive ventilation (intermittent ventilation).
• Expandable via optional additional circuit board ZP 1 for the control of:
• 3-way shutter (e.g. earth-air heat exchanger)
• a regulated pump (e.g. brine earth heat exchanger)
• of an air shutter of a zone control
• Switching contact use for external supplementary heat register
• Expandable via optional circuit board ZP 2 for:
• Pressure constancy of the EC fans
• Differential pressure controlled filter monitoring
• Various inputs and outputs enable a control connection of the ventilation unit with another service installation, such as a heat pump.

Approvals and certificates

• DiBt approval: all WS 170 units (exception: WS 170 .. ET variants).
• PHI certificate: WS 170 KR, WS 170 KL, WS 170 KBR; WS 170 KBL.
• Test report in accordance with DIN EN 13141-7.
• Certificate according to Swiss “energie-cluster.ch”.
• Hygiene certificates for housing material (EPP) and heat exchanger.
• Entry in TZWL Bulletin.

Heat exchanger/heat recovery

• Highly efficient cross-counterflow heat exchanger made of plastic (PS).
• Heat recovery up to 95 %.
• Humidity recovery up to 66 % (for ET units).
• Hygiene certificate (no bacteria, virus growth/virus transfer) according to VDI 6022, sheet 1.
• Heat exchanger can be cleaned with water, antimicrobial.
• Units with enthalpy heat exchangers do not require a condensation connection.

Bypass

• Included in the “B” unit variants.
• Patented automatic 100% bypass for passive summer night cooling with adjustable minimum supply air temperature limit.

Frost protection

• Prevention of the heat exchanger freezing at low temperatures.
• Highly energy-efficient frost protection function for “K” unit models via demand-controlled, power-modulated, electric PTC preheating register.
• For “non-K” unit models via supply air fan switch-off.
• Recommendation: For “non-K” unit models, combine the heat recovery with a brine heat exchanger.

Fans

• Forward curved centrifugal fans in the outside air or outgoing air.
• Energy-efficient EC direct current motors with integrated volumetric flow consistency control.
• Possibility of pressure consistency control via the optional additional circuit board ZP 2.
• 4 ventilation levels from 40 m³/h to 160 m³/h, can be adjusted continuously.

Installation information

• Easy, very time-saving installation with the wall bracket included in the scope of delivery.
• Housing cover is easy to remove using practical magnetic locks.
• Provide sound absorbers on the supply air and exhaust air sides.
• Comments: All unit variants (e.g. "K") can be converted into other unit variants (e.g. "KRET") later on using optional components.