WS 170 KRET - Characteristic curve
I - Interval / vacation operation for humidity protection
- Reduced ventilation
- Nominal ventilation
- Intensive / Party operation
- Recommended setting range
Centralised ventilation unit
WS 170 KRET
No longer available for deliveryManufacturer: MAICO
Centralised ventilation unit with very effective heat recovery through enthalpy cross-counterflow exchanger,... more information
Application examples: Low-energy house, Single-family house, Living room, Office
Product data sheet
Characteristic curve
Dimensioned drawing
WS 170 KRET - Dimensioned drawing [mm]
- DN 125 outgoing air
- DN 125 outside air
- DN 125 exhaust air
- DN 125 supply air
- Cable screw-connection
- Main switch
- Condensation connection
Technical data
WS 170 KRET - Technical data
Accessories / Spare parts
WS 170 KRET - Accessories / Spare parts
Specific accessories
| Product type | Name | Art. No. | Price*(EUR) | Action |
|---|---|---|---|---|
| Plug connectors for ducts | SVR 125 | 0055.0183 | on request | |
| 45° elbow, drawn | B45-125 | 0055.0326 | on request | |
| 90° elbow, drawn | B90-125 | 0055.0312 | on request | |
| Air filter, replacement | WSF 170 | 0093.0271 | on request | |
| Air filter, replacement | WSF-AKF 170 | 0093.0272 | on request | |
| Air filter, replacement | WSG 170 | 0093.0270 | on request | |
| Push-in frame for air filter | WSG-ES 170 | 0093.0269 | on request | |
| Room air control | RLS 1 WR | 0157.0809 | on request | |
| Room air control | RLS D1 WR Discontinued product | 0157.0828 | on request | |
| Temperature sensor | NTC 15 Discontinued product | 0157.0833 | on request | |
| harmful gas sensor | SGS | 0093.1323 | on request |
General accessories
Spare parts
| Product type | Name | Art. No. | Price*(EUR) | Action |
|---|---|---|---|---|
| Circuit board | PL WRWSRB 2 | E101.1352.0005 | on request | |
| Circuit board | PLZ WSRB 170 | E101.1356.0000 | on request | |
| Temperature sensor | TF WRWSRB 2 | E157.1083.0000 | on request | |
| Door contact switch | TS 1 | E157.1150.0000 | on request |
Product description
Productdescription
WS 170 KRET
short description
Centralised ventilation unit with very effective heat recovery through enthalpy cross-counterflow exchanger, EC motors with constant volumetric flow regulation, supply and exhaust air on the right, 4 x DN 125, including frost protection heating and RLS 1 WR control unit, 40 - 160 m³/h, 23 - 46 m³/h in interval mode, KNX connection possible, 4 x SVR 125 plug connector or 90° B90-125 elbow needed to connect folded spiral-seams ducts (order as accessories)Product description
Comfort versions
- Comfort unit with RLS 1 WR room air control, G4 filter (exhaust air) and F7 pollen filter (outside air).
- With electric frost protection heating and sound-optimised housing with extra insulation.
- Device in right-hand version.
Features
- Compact, very quiet and energy-saving unit.
- DC motors with integrated, automatic volumetric flow regulation for constant air volume (volumetric flow consistency).
- Maximum heat recovery and time-saving adjustment.
- Maximum air tightness. Good flexibility thanks to various connection options.
- Sheet steel, powder coated housing.
- Colour white aluminium
- Inner cladding made from temperature-resistant and extremely noise- and heat-insulating plastic (EPP). The material is also characterised by its hygienic and non-hygroscopic properties. Tested by the Institut für Lufthygiene Berlin [Berlin Institute for Air Hygiene] according to VDI 6022 Part 1.
- The narrow unit is particularly well-suited to installation in kitchens.
- Simple filter change is possible without tools.
- 4 DN 125 duct connections. Can be equipped with plug-in connectors or duct bend (accessories).
- Connection to KNX possible.
- Connection to EnOcean possible (WS 170 KBR../WS 170 KBL..).
- Integrated MODBUS interface (WS 170 KBR../WS 170 KBL..).
- DIBT approval (exception WS 170..ET).
- PH certification (exception for WS 170 R../WS 170 L.. and all WS 170..ET).
RLS 1 WR control unit
- Included in scope of supply for all WS 170 units.
- Switching the 4 ventilation levels, maintenance display, fault messages.
- Optional with/without on/off switch.
- Other control units can be connected in parallel.
RLS D1 WR digital control unit
- Optional for WS 170 R.., WS 170 L.., WS 170 KR.. and WS 170 KL...
- Control and power supply through a 2-core bus cable.
- Digital status display, switching the 4 ventilation levels, time and date (weekly program, "Plus function", maintenance display and fault messages).
- Plus function (summer operation): In eco mode, only the exhaust fan runs, so around 50 % less power is used.
Touch screen control unit RLS T1 WS
- Optional for WS 170 KBR../WS 170 KBL...
- Up to 6 operating modes possible.
- 2 automatic operating modes (Auto Sensor / Auto Time).
- 4 manual operating modes (ECO exhaust air / ECO supply air / OFF).
air@home
- The WS 170 KBR../WS 170 KBL.. units have an integrated web server and can be controlled with an app when at home or out and about, e.g. using a smartphone.
- Live reports, user administration, control and setting using web tool, via tablet, laptop and PC.
- Settings:
- Needs-based automatic mode / Time-controlled automatic mode.
- Manual operation / OFF.
- ECO mode supply air or ECO mode exhaust air.
- Filter queries, error messages.
- Registration needed. For more info, see "www.air-home.de"
Controller
- 3 temperature sensors in outside -, outgoing and supply air connections.
- 1 combination sensor (temperature and humidity) in exhaust air connection.
- Integrated excess humidity avoidance function.
- Continuously variable needs-based adaptation of air volumes.
- Can be extended with other PCBs (e.g. ZP 1, ZP 2).
ModBus
- Units WS 170 KBR../WS 170 KBL...
- Integrated MODBUS interface enables integration in the building control technology.
EnOcean
- Units WS 170 KBR../WS 170 KBL...
- Optional EnOcean plug-in module E-SM for integrating the ventilation unit into "EnOcean world" "www.enocean-alliance.org".
- The data is transferred in the 868.3 MHz frequency band.
- Only the following EnOcean Equipment Profiles (EEP) are supported by the E-SM plug-in module: EEP A5-04-01, EEP A5-09-08, EEP A5-09-04, EEP F6-02-01.
KNX
- All WS 170 units can be connected to the KNX building control technology (www.knx.org).
- WS 170 R../WS 170 L.. and WS 170 KR../WS 170 KL.. via an additional KNX fan coil actuator (provided by the customer).
- WS 170 KBR../WS 170 KBL.. via optional KNX plug-in module K-SM accessory.
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.
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.
Condensation drain
- Not required.
- If condensation drain is not used, close drain opening.
Wiring diagram
WS 170 KRET - Wiring diagram
WS 170 KR and WS 170 KL wiring diagram
A - WS 170 ventilation unit
A1 - Electronic slide-in module
A2 - Control circuit board
A3 - Frost protection heat register
B - RLS D1 WR room air control
B1 - RLS 1 WR room air control
W1 - 230 V AC connection cable
W2 - Shielded control cable provided by customer, e.g. LiYCY 2 x 0.75 mm² for RLS D1 WR room air control; instead of B1 (RLS 1 WR) room air control, B1 (RLS D1 WR) room air control can be connected.
W2´ - Control cable (provided by customer) for RLS 1 WR room air control outer diameter of control cable 3.2...6.5 mm, e.g. LIYY 6x0.34 mm²
S1 - Unit switch
GW1 - Gateway frost protection heat register
M1 - Supply air fan
M2 - Exhaust fan
S - Door contact switch: activated by front plate
T-min - Frost protection temperature sensor
Supply air
Z1 (blue) - potentiometer adjuster, ventilation level 1
Z2 (blue) - potentiometer adjuster, ventilation level 2
Z3 (blue) - potentiometer adjuster, ventilation level 3
Exhaust air
A1 (red) - potentiometer adjuster, ventilation level 1
A2 (red) - potentiometer adjuster, ventilation level 2
A3 (red) - potentiometer adjuster, ventilation level 3
Jumper settings
J 1-3 - Unit type, 000 = WS 170
J 4-5 - Frost protection temperature
J 6 - No function
J 7 - Jumper 7 open: Ventilation level 3 is reset after an hour.
J 8 - RLS 1 WR or RLS D1 WR room air control active: Leave factory setting, J8 must be bridged.
J 9 - Jumper 9 open: The ventilation unit can be switched off at the room air control. Jumper 9 bridged: RLS 1 WR: Switch-off function blocked RLS D1 WR: Ventilation unit runs in "Humidity protection ventilation" mode when in the OFF switch position.
J 10 - HY 5 or CO2/VOC sensor: Without a sensor, jumper 10 must be open. Jumper 10 open: Hygrostat released with potential-free contact. Jumper 10 bridged: CO2/VOC sensor (0 to 10 V output) released.
Further connection options
W3 Connection cable (provided by customer) for external operating display.
k1 - Potential-free relay contact (max. 3A / 250 VAC, 2A / 30 VDC). The contact is closed when the ventilation unit is running.
W4 - Connection cable (provided by customer) for external CO2 sensor or external hygrostat (hygrostat with potential-free contact).
W5 -Connection cable (provided by customer) for external differential pressure controller. Differential pressure controller with potential-free relay contact. Minimum switching capacity of relay contact: 230VAC/2A. Remove J1 bridge on A2 control circuit board.
W6 - Connection cable (provided by customer) for external supply air temperature sensor. Sensor type=NTC 10k. Remove 12k resistor on GW1 circuit board.
WS 170 ventilation unit with RLS 1 WR room air control
A - WS 170 electronic slide-in module
A2 - Control circuit board: jumper 8 bridged (= factory setting)
B1 - 1. RLS 1 WR room air control
B2 - 2. RLS 1 WR room air control
W1 - 230 V AC connecting cable
W2' - Control cable for room air control
V - Distributor (supplied by the customer)
You can connect up to 5 RLS 1 WR room air controls to the ventilation unit. If several room air controls are used, no CO2 sensor may be connected.
RLS 1 WR room air control can also be connected to RLS D1 WR room air control.
No need for distributor "V" if only one RLS 1 WR room air control is connected.
WS 170 ventilation unit with RLS D1 WR room air control
A - WS 170 electronic slide-in module
A2 - Control circuit board: Jumper 8 bridged (= factory setting)
B - RLS D1 WR room air control
W1 - 230 V AC connection cable
W2 - Control cable for room air control, shielded control cable
WS 170 ventilation unit with external operating display and RLS 1 WR or RLS D1 WR room air control
A - WS 170 electronic slide-in module
A2 - Control circuit board: Jumper 8 bridged (= factory setting)
B - RLS D1 WR room air control
B1 - RLS 1 WR room air control
H1 - Display element, e.g. glow lamp (to be supplied by the customer)
W1 - 230 V AC connection cable
W2, W2´ - Control cable for room air control
W3 - Cable for an external operating display (to be supplied by the customer). The connection on A2 control circuit board is done at the “Operating display” terminals.
An operating display (lamp, contactor, etc.) can be connected to the control circuit board for external monitoring of the ventilation unit by a building supervisor, for example. For this purpose, there is potential-free relay contact on the control circuit board “k1”.
Relay contact “k1” is closed when the ventilation unit is running. Maximum load-bearing capacity for relay contact k1 = 3A / 250 V AC, 2A / 30 V DC.
WS 170 ventilation unit with CO2 sensor or VOC sensor and RLS 1 WR or RLS D1 WR room air control
A - WS 170 electronic slide-in module
A2 - Control circuit board: Jumper 8 bridged (= factory setting) Jumper 10 bridged = sensor is detected.
B - RLS D1 WR room air control
B1 - RLS 1 WR room air control
CO2 - SKD CO2 sensor
VOC - EAQ 10/2 air quality controller
W1 - 230 V AC connection cable
W2, W2´ - Control cable for room air control
W4 - Connection cable for external CO2 sensor and/or VOC sensor (provided by customer). Connection to A2 provided by customer at CO2 and OT terminals. Set jumper 10 (CO2) to release the feature
When connecting a CO2 or VOC sensor for the demand-driven fresh air supply. The ventilation unit only reacts to the sensor if ventilation level 2 (nominal ventilation) is selected on the room air control.
If a CO2/VOC sensor is connected, only one RLS 1 WR room air control may be connected.
Never operate an EAQ 10/2 air quality sensor together with a CO2 sensor.
WS 170 ventilation unit with hygrostat and RLS 1 WR or RLS D1 WR room air control
A - WS 170 electronic slide-in module
A2 - Control circuit board: Jumper 8 bridged and jumper 10 (CO2) = open (= factory setting)
B - RLS D1 WR room air control
B1 - RLS 1 WR rH room air control HY 5 or HY 5 I hygrostat
W1 - 230 V AC connection cable
W2, W2´ - Control cable for room air control
W4 - Connection cable for external hygrostats (to be supplied by the customer). Connection to A2 control circuit board at CO2 terminals
When connecting a hygrostat with potential-free contact for demand-driven removal of moisture, the hygrostat must have a potential-free switching output.
The hygrostat always switches the ventilation unit to ventilation level 3 if the set humidity value is exceeded (potential-free contact in hygrostat closes).
If the humidity in the room drops, the ventilation unit switches back to the previously selected ventilation level.
If you switch manually from ventilation level 3 to level 2 or 1, this deactivates the automatic function of the hygrostat temporarily. This is then switched back to active if the level drops below the hygrostat set point once.
Connect the hygrostat to terminal "CO2".
Jumper 10 on the A2 control circuit board must be open.
Set the switching point at the hygrostat manually.
Never connect a hygrostat and a CO2 sensor/VOC sensor at the same time.
WS 170 ventilation unit with differential pressure controller and RLS 1 WR or RLS D1 WR room air control
A - WS 170 electronic slide-in module
A2 - Control circuit board: Jumper 8 bridged (= factory setting)
B - RLS D1 WR room air control
B1 - RLS 1 WR room air control
P - Differential pressure controller with potential-free relay contact k (provided by customer)
k - Switching output, potential-free relay contact
W5 - Connection cable for differential pressure controller (provided by customer)
If there is negative pressure in the room, the differential pressure controller switches the fans in the ventilation unit off. This blocks the room air control RLS 1 WR. The LED display goes out. The unit is only released again when the differential pressure controller switches the fans back on. The ventilation unit runs again at the same ventilation level
as before it was blocked.
WS 170 ventilation unit with NTC 15 supply air temperature sensor and RLS 1 WR or RLS D1 WR room air control
A - WS 170 electronic slide-in module
A2 - Control circuit board: Jumper 8 bridged (= factory setting)
B - RLS D1 WR room air control
B1 - RLS 1 WR room air control
GW1 - Gateway frost protection heat register
GW2 - Gateway bypass shutter (only WS 170 bypass unit)
T1 - Supply air temperature sensor in
supply air channel (provided by customer)
W1 - 230 V AC connection cable
W2, W2´ - Control cable for room air control
W6 - Connection cable of supply air temperature sensor. Connection on GW1 circuit board to KL2 terminals.
For WS 170 in passive-energy houses, an NTC 15 must also be installed to protect against icing over (if the supply air is too cold). The ventilation unit then switches off at supply air temperatures of less than 6 °C.
Only in Comfort and Bypass units when deploying a supply air temperature sensor: Remove the resistor on GW1 circuit board at the KL2 terminals.
Downloads / Videos
WS 170 KRET - Downloads / Videos
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