MAICO WS 170 Centralised Ventilation Unit Instruction Manual

MAICO WS 170 Centralised Ventilation Unit

Specifications:

• Model: WS 170
• Functions: RLS 1 WR and EnOcean-Taster
• Software: WebTool, APP (iOS), APP (Android)
• Installation, Commissioning, and Maintenance Instructions included

Product Usage Instructions

USB Connection:
Connect the device using the USB port on the board according to the specified connection variant.

System Settings:
Access and adjust system settings through the control panel,including time programs, display settings, installer preferences, software version, error log, and other relevant options.

Room Settings:
Configure room temperature settings, sensor operations, CO2/VOC thresholds, and other environmental parameters for optimal performance.

Additional Features:
Explore additional functionalities such as EnOcean wireless module, KNX compatibility, BACnet integration, switch testing, and internet connectivity for advanced control options.

WS 170 Installation, Commissioning and Maintenance Instructions

WS 170 Installation, Commissioning and Maintenance Instructions

Instructions, software, links
The installation, commissioning and maintenance instruc-tions contain important information on the installation, adjustment, commissioning and maintenance of the ventilation unit.
The Safety instructions supplement contains important information for the operator and specialist installer. Read it carefully and completely, before operating, setting, opening the ventilation unit or making changes to the ventilation system. Follow the instructions.

The quick start guide contains essential information on the setting options on the RLS 1 WRcontrol unit such as setting the operating modes/ventilation levels, what to do in the event of a malfunction and how to change the filter.

The operating instructions in the Internet (→ www.maico- ventilatoren.com) contain detailed information on operation, settings, registration with the smartphone app or the web tool and troubleshooting.
Assemblies/components in the instructions are not shown in their actual colours. Colours are used to identify associated assemblies/components.

Additional software
Commissioning software for configuring and adjusting the ventilation unit → chapter Commissioning or www.maico-ventilatoren.com

QR codes for direct access

Safety

• Read these instructions and the enclosed safety instruc-tions carefully and completely before installation.
• Follow the instructions.
• Pass these instructions on to the owner/operating company for safekeeping.
  Safety devices are designed for your protection and must not be bypassed or tampered with.

Scope of delivery
WS 170 ventilation unit, RLS 1 WR control unit, wall bracket, condensate drain set (condensate bend with reducer, cable tie), safety instructions supplement, quick start guide and these installation and commissioning instructions.

Intended use

This ventilation unit with heat recovery is used for controlled ventilation of apartments, offices or similar rooms.

The ventilation unit is only intended for domestic use and similar purposes. No other or additional use is intended.

Unit Overview

Unit types

• K = Preheating register
• B = Bypass
• ET = Enthalpy heat exchanger
• L = Left-hand version
• R = Right-hand version

Unit front

Remove front cover

Structure / duct connections

Fig.: WS 170 KBR/KBRET in right-hand version. WS 170 KBL/KBLET in left- hand version, mirror image.

Control units, software, interfaces

Authorizations for parameter settings with thefollowing control units/tools

Control unit/tool| Authorised person| Changing paramet ers| Querying paramet ers
---|---|---|---
RLS T1 WS or

RLS T2 WS touchscreen control unit

(both optional)

| Owner| X| X
Installer| X| X
RLS G1 WS design control unit (optional)| Owner|  |
Installer| X| X
 app| Owner| X1| X
Tenant|  | X
 web tool| Owner| X1| X
Installer| X| X
ModBus instead of RLS T1 WS, RLS T2 WS or RLS G1

WS touchscreen control unit (interface must not be occupied).

|  | X1| X
KNX (optional)|  | X1| X

Changes only possible to a limited extent.

RLS 1 WR control unit (scope of delivery)

With functions on/off, 4 ventilation levels, filter changeand fault indicator. The RLS 1 WR can be combined withup to 4 further RLS 1 WR, connected in parallel → Opera-tion with RLS 1 WR. Auto sensor operation only possiblewhen using a single RLS 1 WR.

RLS T2 WS touchscreen control unit

RLS T2 WS functions (touchscreen control unit): Manual, Auto time, Auto sensor, ECO mode supply air, ECO mode exhaust air, On/Off, Filter change and Fault display.
The RLS T2 WS can be combined with up to 5 RLS 1 WR, with a reduced range of functions. Reduced range of functions RLS 1 WR = no operating modes selectable, ventilation runs for a limited time, no device off/standby.

RLS G1 WS design control unit

RLS G1 WS functions (touchscreen control unit): 5 ventilation levels, Auto time, ECO supply air, ECO exhaust air, On/Off, Filter change and Fault display. Operating mode Auto Sensor indirectly available via Auto Time setting.
The RLS G1 WS can be combined with up to 5 further RLS 1 WR, with a reduced range of functions. Reduced range of functions on RLS 1 WR = no operating modes selectable, ventilation runs for a limited time, no unit off/standby.

Further operating and setting options for users and specialist installers

• Free app (iOS/Android smartphone app)
• Web tool (PC software for operating or setting upthe ventilation unit, download from the Internet) With the web tool, a registered owner can activate authorisations for tenants or specialist installers so that they have special setting optionsfor the ventilation unit on the Internet.

RLS 1 WR operating modes with single control unit (Solo)

• Manual operating mode
• Auto sensor operating mode: Function only active for nominal ventilation (ventilation level II) if external sensors are connected or the Combi sensor operation parameter is set to linear → CO2-/VOC-/Rel. Humidity limit value min./max. [} 34].
• Operating mode Off: Function can be deactivated with Single control unit Blocking off parameter (single control unit = RLS 1 WR control unit).

Functions RLS 1 WR and EnOcean button in combination with RLS T1 WS, RLS T2 WS or RLS G1 WS

Operating modes selectable with the RLS T1 WS,RLS T2 WS or RLS G1 WS: Manual, Auto time, Auto sensor, ECO mode supply air, ECO mode exhaust air and Off.

• Operating mode: The operating mode selected on the touchscreen control unit cannot be changed with the RLS 1 WR.
• Ventilation level: The change of the ventilation level made at an RLS 1 WR or with an EnOcean button runs for a limited time. The ventilation unit then switches back to the ventilation level selected on the touchscreen control unit.
  The Off function can be deactivated with the Single control unit Blocking off parameter (single control unit = control unit RLS 1 WR).

Additional circuit boards, switching contacts, sensors, plugin modules, interfaces

• ZP 1 and ZP 2 additional circuit boards (both optional), combination can be selected freely
• ZP 1 controls a brine CP (brine EHE controlled/uncontrolled) OR supplementary heating (electric, hydraulic, etc.) OR 3-way air shutter of an earth-air heat exchanger OR zone control.
• ZP 2 is used for filter monitoring with differential pressure sensor (instead of timer) OR for controlling a pressure-constant operation (instead of volumetric flow constancy).
• E-SM EnOcean plug-in module (optional): For connection of EnOcean wireless components.
• K-SM KNX plug-in module (optional): For connection to a KNX bus system.
• ModBus interface (selectable with commissioning software)
• Modbus interface (TCP/IP and RTU) integrated in the ventilation unit, enables integration in the building control system. Parameterization with the commissioning software. Up to 5 further RLS 1 WR permitted.
• ModBus for TCP/IP generally selectable. For RTU, the Mod-Bus can only be selected if no RLS T2 WS or RLS G1 WS is connected (interface must not be occupied).

External sensors (optional)
Humidity sensor, CO2 sensor or VOC sensor. External sensors require a 0-10 V output and a linear characteristic curve. Standard connection of sensor 1 and 2 at terminal block X12/sensors at 24 VDC.
If no RLS 1 WR is connected, the connections on terminal block X13/RLS can be used for 2 additional sensors
(sensor 3 and 4, each 12 VDC). For a 24 VDC power supply to sensors 3 and 4, the voltage can be tapped at the terminals of sensors 1 and 2 (double assignment).

Home network (Loxone) to Modbus
Loxone building control system can be connected to the Modbus interface (TCP/IP and RTU) integrated in the ventilation unit. Parameterisation with commissioning software.
ModBus for TCP/IP generally selectable. For RTU, the Mod-Bus can only be selected if no RLS T2 WS or RLS G1 WS is connected (interface must not be occupied).

Technical data

min. 70 cm
Dimensions (W x H x D)| 595 x 820 x 435 mm
Air connections| DN 125
Outside air filter| F7
Exhaust air filter| G4
Condensation drain| Insertion sleeve for 3/4″ hose
Protection class| 1
Degree of protection| IP 00
Max. permissible humidity in installation room (20 °C)| 70 %
Rated voltage| 230 V AC
Power frequency| 50 Hz / 60 Hz
Power consumption (ventilation unit) at 100 Pa Counter pressure per duct| 16 … 75 W
Weight| 47 kg

For more technical data → rating plate.

Transport
Observe safety instructions for transport → supplementary sheet Safety instructions

Installation location, operating conditions

• For these ventilation units, a permanent installation in dry indoor spaces is prescribed, for example in a utility room.
• Complete all on-site work before installation. The ventilation unit cannot be moved once the duct has been connected.
• The ventilation unit is designed for wall installation (vertical installation position) on a wall with sufficient load-bearing capacity (min. 200 kg/m³).
• A flat, hard wall surface is mandatory. This avoids vibration noise.
• Fit a siphon, pointing downwards by at least 2 %, and open drip funnel for condensate drainage.
• Installation is also permitted on a suitable socket/frame with sufficient space for the condensate drain.
• Allow free space under the ventilation unit for condensate drainage and an open drip funnel.
• Use supplied wall bracket with premounted rubber pads.
• The front cover must be removable at all times. Free access is important for cleaning and maintenance work: Working space in front of the unit of at least 70 cm.
• Note the space needed for additional components.
• Only use accessories and spare parts approved by the manufacturer.
• Select installation position so as to avoid contamination and draughts.
• Select the installation location and model for the ventilation unit so that noise emissions are kept to a minimum. If possible, avoid sound bridges with the structure by observing sufficient distance from other façade elements.

Unit installation, electrical connection

The power cable is already wired inside the unit and led out of the ventilation unit. The control cable of the RLS 1 WR control unit (alternatively RLS T2 WS) is led into the ventilation unit and wired on the main board of the electronic slide-in module.

Observe the Safety instructions supplement.
When working at heights, use suitable ladders/climbing aids and ensure that they are stable. Work in pairs and make sure that you are standing securely and that no one is underneath the unit.

CAUTION Risk of injury if the ventilation unit or front cover falls down.
Ensure that the ventilation unit and the front cover are fastened properly. Observe accident prevention requirements.

Mounting the ventilation unit on the wall
Heat recovery in ventilation units without enthalpy heat exchangers produces condensate, which must be properly drained off via the condensate drain. Provide sufficient space for the condensate drain under the unit. Ventilation units with ET enthalpy heat exchangers do not require a condensate drain.

ATTENTION: Functional impairment due to condensate if the ventilation unit is not aligned. The ventilation unit must be installed horizontally so that the condensate can drain off unhindered.

1. Loosen the two quickrelease locks and remove the front cover.
2. Mount the wall rail (provided by customer) on the wall with appropriate mounting material. Unit rail [S1] is preinstalled. Make sure it is horizontal.
3. Hang the ventilation unit in the wall rail. The unit rail and wall rail must cover one another completely, the unit must make contact with both rubber pads on the wall.

Condensate drain
A condensate drain is necessary for ventilation units without an ET enthalpy heat exchanger. No condensate drain is needed in units with an ET enthalpy heat exchanger.

Ventilation units with a condensate drain

• WS 170 L, WS 170 KL, WS 170 KBL
• WS 170 R, WS 170 KR, WS 170 KBR Installing the condensate drain

NOTICE Without a siphon, the ventilation unit will draw in infiltration air through the drain pipe.
Be sure to install a siphon. Never install several siphons one after another without a pipe separator.

Fig.: Right-hand version of the ventilation unit (the left-hand version is mirror-inverted)

1. Remove the sealing plug from the condensate drain outlet.

2. Attach the supplied condensate elbow to the condensate drain outlet at the bottom of the ventilation unit. The condensate elbow has a sleeve with a lip seal and can be rotated 360°.

3. Properly connect a Ø 28 mm drain pipe or a ¾” water hose to the condensate elbow. To connect the water hose, use the supplied reducer.
   Fig.: Right-hand version of the ventilation unit (the left-hand version is mirror-inverted)1| Eyelet
   ---|---
   2| Cable clip
   3| Water seal head of at least 50 mm

4. Secure the condensate elbow to prevent it falling out. To do this, attach the supplied cable tie to the condensate elbow and hook the cable tie onto one of the eyes.

5. If the humidity level in the installation room is disproportionately high, insulate the drain and condensate drain outlet to avoid condensate.
   NOTICE Germ build-up possible if siphon is without drip funnel, as there is no decoupling from the wastewater system.
   Siphon needs water seal head of at least 50 mm. Install an open drip funnel with another siphon at the drain system side.

6. Fit siphon with drip funnel and water seal head of at least 50 mm as shown.

7. Fill drain with water, check seal integrity and drainage. Fill the siphon up with water after long dry periods too.

8. Fit front cover and secure with the two quick-release clips.

Air ducts/insulation
Air ducts, protective grilles, inspection openings etc. must be installed and insulated according to the requirements of the planning office’s planning documents.
Outside and outgoing air connections must be insulated diffusion-tight, to avoid condensation in or on the pipes.
Particularly in the transition area, from MT ducts (thermally insulated MAICOTherm ventilation duct system) to other air ducts or ventilation unit sockets, reinsulation is required.

Electrical connection
NOTICE Damage to the unit due to a short circuit if water enters the electronics compartment.
Ensure correct, tight line feedthrough through the cable feedthrough and membrane grommet with slot.

NOTICE Danger of injury due to sharp edges on sheet metal/break-outs in the housing or in the electronics compartment.
Wear protective gloves if necessary. Carefully guide connecting cables into unit. Do not damage cables.
If the connecting cables are too short, the electronic slide-in module cannot be fully pulled out and fitted on the housing. Ensure connection cables of a sufficient length inside the ventilation unit.
A fixed wiring for the mains connection is mandatory. The power cable is already wired inside the unit and led out of the unit.
Take electronic unit with main board out of ventilation unit and attach as described below.

1. Loosen the two quick-release locks and remove the front cover.
2. Loosen both screws of the electronic slide-in module →arrows.
3. Pull out the electronic slide-in module and hook it intoboth recesses → arrows.
4. Install optional additional circuit board(s) ZP 1 and/orZP 2 in the slots and connect with the provided connection cables. Check DIP switch settings and adjust if necessary. For electrical connection and DIP switch settings → installation instructions of the accessories.
5. Plug optional KNX or EnOcean plugin module (K-SM or E-SM) into slot X01 of the main board →installation instructions of the accessories.
   1| Cable feedthrough
   ---|---
   2| Main switch
   3| Cable feedthrough
   4| Membrane grommet with slot
6. Guide connection cables of the control units and additional components through cable feed-throughs [3] or[4] into ventilation unit. Ensure seal integrity (IP protection).
7. Make electrical connections according to wiring diagram [} 64]. For connection variants of the additional components → installation instructions of the accessories.
8. Insert the electronic slide-in module into the electronics compartment and screw it in place with bothscrews.
9. Attach front cover and secure with both quick-release clips.
10. Set the main switch to On (position I). The LEDs on the RLS 1 WR switch on.
11. Carry out a function test and put the ventilation unit into operation → Commissioning [} 29].
12. Install control unit(s) → Wiring diagrams [} 64].

Installation of the RLS 1 WR control unit Installation conditions: Install a flush-mounted box at the installation location of the RLS 1 WRand guide in the connection cable.

1. Remove cover of the RLS 1 WR.
2. Connect the connection cable to the RLS 1 WR → Wir-ing diagrams [} 64].
3. Use 2 screws to secure the RLS 1 WR to the flush-mounted box.
4. Fit cover of the RLS 1 WR.

Installation of the RLS T2 WS control unit

Retrofitting the RLS T2 WS control unitNOTICE Incorrect wiring will result in unit damage.
Be sure to note the writing on the control unit and control circuit board. Only connect as shown in the enclosed wiring plan. The commissioning software must be installed for the touchscreen control unit. For download and further information see Chapter 1, Instructions,Software, Links, Videos.

Recommended installation position of the room temperature sensor (bottom side of the RLS T2 WS)

• Installation height approx. 1.5 m
• Not in direct sunlight
• Not above sources of heat
• Not in cold draughts (doors, windows)

Preparations for installation, to be made by the customer

1. Flush-mounted box at the installation location.

2. Route connection cables at the installation location. Permitted: Shielded control cable, e.g. LIYY 4 x 0.34 mm².
   Fitting control unit at installation location

3. Fit supplied mounting plate on flush-mounted box.

4. Wire supplied connector plug.

5. Attach the control unit (steps ① to ③) → Wiring diagrams.

6. Plug connector plug into control unit and screw in.

7. Push the control unit onto the mounting plate and snapit into place.

8. Check the functions on the control unit.
   Lead the connection lines into the ventilation unit and wire them electrically

9. Remove front cover of ventilation unit → Ceiling/wall installation.

10. Remove the screw on the electronics slide-in module,pull the electronics slide-in module out of the electronics compartment and hook it into the securing groove of the ventilation unit frame.NOTICE If the connection cables are too short, the elec-tronics slide-in module cannot be fully pulled out/fitted.
    Ensure connection cables of a sufficient length inside the ventilation unit.
    NOTICE Danger of short-circuits/damage to unit should water enter the electronics compartment.
    Ensure correct, tight line feedthrough the cable feed-through.

11. Correctly push through cable feedthrough.

12. Guide connection cable through cable feedthrough intoventilation unit.

13. Check for leaks and remedy any found. Only guide connection cable individually through the cable feedthrough. Feedthroughswhich are not needed must remain sealed.

14. Wire cables electrically on the control circuit board A2, terminal block X11 (RS 485), according to the wiring diagram of the ventilation unit → Wiring diagrams.

15. Push the electronics slide-in module into the electronics compartment and screw it tight.

16. Attaching front cover.

17. Switch on the mains fuse, the ventilation unit switches on.

18. Use the Commissioning software to set the Basic settings / Comfort control unit parameter to RLS T2 WS.

19. Test settings and functions.

Replacing RLS T2 WS
Removal (steps ① to ④)

Installation (steps ① to ③)

RLS 1 WR: Control elements, LEDs

The ventilation levels can be set manually with the RLS 1 WR control unit. LEDs indicate the selected ventilation level, a pending filter change or faults.
In ventilation level II (nominal ventilation), the ventilation unit switches to the Auto sensor operating mode (setting can be changed by the installer). The automatic system ensures hygienically perfect ventilation based on the determ-ined humidity values (combi sensor) and/or air quality values (optional CO2/VOC sensor).

Ventilation levels I-III: Shift up with the ▼ button, shift down with the ▲ button.

Ventilation level I| Ventilation for humidity protection (building preservation). LED I flashes. Inter- val ventilation 13 minutes on – 17 minutes off –

13 minutes on.

---|---
Ventilation level I| Reduced ventilation. LED I on. Continuous operation.
Ventilation level II| Nominal ventilation. LED II on. Continuous operation. Ventilation unit in Auto sensor operating mode.
Ventilation level III| Intermittent ventilation. LED III flashes. Intensive ventilation with timer. Once a timer interval has elapsed, the ventilation unit switches back to nominal ventilation
Ventilation level III| Intensive ventilation. LED III on. Continuous operation.
Filter change indicator| LED II flashes.
Fault display| All 3 LEDs flash on the

RLS 1 WR. The fault elimination must be acknowledged manually. Press both arrow

 | keys at the same time for 3 seconds.

RLS T2 WS: The fault is displayed. Acknowledge fault clearance on the display. RLS G1 WS: The status LED lights up red.

Press both ventilation level keys at the same time for 3 seconds.

---|---

Operating modes with RLS 1 WR as a solo control unit Manual, Auto sensor or Off

Auto sensor function only active

• with nominal ventilation (ventilation level II),if external sensors are connected or
• Combi-sensor operation parameter is set to linear.

Off function can be deactivated with Single control unit Blocking off parameter (single control unit = RLS 1 WR control unit).
Operating modes when using several RLS 1 WR/EnOcean pushbuttons or in combinations with a touchscreen control unit

Manual, Auto time, Auto sensor, ECO mode supply air, ECO mode exhaust air or Off

• The operating mode is preset via the touchscreen control unit, APP or the web tool.
• Ventilation level adjustment is possible for a limited period of time.
• Off function can be deactivated with Single control unit Blocking off parameter (single control unit = RLS 1 WR control unit).

To put units into standby on the control unit,select ventilation level 0 = Off.

RLS T2 WS: Control elements, displays, functions

RLS T2 WS touchscreen control unit for ventilation units with control. Scope of functions on the RLS T2 WS as described below.

Standard display/start screen Start screen activated ex works. This can be deactivated with the commissioning software.

Main menu value call-up
Here current unit values such as temperature and humidity measurement values, unit statuses or fault messages canbe called up.

Operating mode selection

Set the basic mode of operation of the ventilation unitwith the operating mode.

Operating mode: Auto time

Mode of operation: activates the control time program/holiday time program.

Operating mode: Auto sensor

Mode of operation: Automatic operation with sensor control.

Operating mode: Manual

Mode of operation: Manual mode. Operating mode:

Eco mode supply air

Mode of operation: Energy-saving summer operation with supply air fan.

Operating mode: Eco mode exhaust air

Mode of operation: Energy-saving summer operation with exhaust air fan.

Operating mode: Off

Mode of operation: Standby mode (fans off). Choose between automatic operating modes (Auto time, Auto sensor) and manual operating modes (Manual, ECO mode supply air, ECO mode exhaust air and Off).

Ventilation level short code
Activates the ventilation level. The setting is available in a manual operating mode.

Ventilation level: Ventilation for humidity protection

Mode of operation: Interval operation, approx. 43 % of re-duced ventilation (according to DIN 1946-6).

Ventilation level: ventilation level 1

Mode of operation: Continuous operation with reduced ventilation RV

Ventilation level: ventilation level 2

Mode of operation: Nominal ventilation NV

Ventilation level: Intermittent ventilation

Mode of operation: Time-limited intensive ventilation IV (with timer).

Ventilation level: ventilation level 3

Mode of operation: Intensive ventilation IV

Commissioning

The ventilation unit can be commissioned with the commissioning software (Windows) or with the optional RLS T2 WS touchscreen control unit.

Pre-requirements

• Building is ready for occupancy
• all connection lines are correctly and firmly attached
• all supply and exhaust air valves are mounted and open
• the ventilation ducts are insulated
• all outgoing air and outside air covers are mounted
• all shutters are open
• all protective materials have been removed (e.g. filters provided by customer) the ventilation unit is correctly connected to the mains and the cable lead-throughs are tight
• The DIP switches of installed, optional additional circuit boards are set to suit the application → accessories instructions.

Commissioning software
In the installer level of the commissioning software (Windows), installers specialised in ventilation technology can configure and adjust the ventilation unit. Download the commissioning software to PC/notebook as described below.

System requirements

• PC with Windows operating system and internet access (may be subject to charges).
• Not approved for other operating systems.
• Minimum PC requirements: Microsoft Windows operating system with at least Win 7, Microsoft .NET Framework 4.5®, processor with 1 GHz, 2 GB RAM, 3 GB of free hard disk space, USB 2.0, LAN-100 MBit/sec.

1. Scan QR code. Alternatively, select → www.maico-ventilatoren.com .
2. Download commissioning software to PC/notebook.

USB connection
NOTICE Damage to the unit due to a short circuit if water enters the electronics compartment.
Ensure correct, tight line feedthrough through the cable feedthrough and membrane grommet with slot.

WS 170 connection variant 1: USB port out-side

1. Connect PC/notebook to ventilation unit at the USB port.

WS 170 connection variant 2: USB connec-tion directly on circuit board

1. Switch off ventilation unit, disconnect at all poles from the power supply and position a visible warning sign.
2. Loosen both quick-release clips and remove the front cover.
3. Loosen both screws on the electronic slide-in module and pull out the electronic slide-in module.
   1| Main switch
   ---|---
   2| Membrane grommet with slot
   USB| USB port
4. Guide the USB cable into the ventilation unit through the membrane grommet with slot.
5. Connect PC/notebook to ventilation unit at the USB port. For USB interface → Wiring diagrams [} 64].
6. Slide the electronic slide-in module back in and secure it with the two screws.
7. Fit front cover and secure with the quick-release clips.
8. Switch on the mains fuse and switch on the ventilation unit with the main switch.
9. Call up commissioning software. Select USB connection. The start screen appears.
10. Set ventilation unit in accordance with planning office’s setting specifications. To access the installer level, enter the password you have been provided under Set-tings/Installer → Installer [} 30].
11. After the first commissioning, be sure to save a commissioning log.
12. Remove the USB cable. Proceed in reverse order to that described above.

System settings menu

In the System settings menu, basic settings of the control units can be made, such as key lock or luminosity. You can also switch to the installer level. Within this level, the system configuration for the multiple-unit connection (max. 5 units) for the RLS T2 WS should be set.

Operating structure for system settings

Display

• Parameters: Language
• Setting value: currently: German, English, French
• Parameters: Date/time
• Setting value: Hours/minutes/day/month/year
• Parameters: Key lock (configuration only possible in installer level)
• Setting value: No/Yes
• Parameters: Change key lock code (between 4 and 8 digits are possible)
• Set value: Factory settings: 0000
• Parameters: Activate/deactivate key lock now
• Setting value: Key lock is activated immediately. Deactivation of key lock via system settings/display/deactivate key lock now and PIN input.
• Parameters: Display – standby time
• Set value: Minute settings of between 1 and 10 minutes. Factory settings: 5 minutes.
• Parameters: Display – brightness
• Set value: Setting for brightness of between 0 and 100 %.

Time programme
The time programme is programmed at the unit level. More information can be found in the Ventilation time programme chapter → Ventilation.

• Parameters: Copy regular time programme throughout system.
• Setting value: Time settings can be transferred from one unit to other units.
• Parameters: Copy holiday time programme throughout system.
• Setting value: Time settings can be transferred from one unit to other units.
• Parameters: Start date for holiday time programme Setting value: Applies to all units connected to the control panel.
• Parameters: End date for holiday time programme Setting value: Applies to all units connected to the control panel.

System

• Parameters: Number of ventilation systems

• Set value: Number of ventilation systems to be set (max. up to 5 ventilation systems). The ventilation systems are addressed via the commissioning software. The addresses can only be configured once in the bus system.

• Example: 3 ventilation systems, control panel setting: Number of ventilation systems = 3, addressing of ventilation systems: Address 1, Address 2, Address 3.

• Parameters: Configuration of ventilation systems
  Current ventilation systems visible with unit status. Ventilation systems, which cannot be accessed via bus communication, are displayed with the Not available status.
  The ventilation systems can also be designated and ventilation systems assigned to a group in the configuration. The group should be activated for this purpose.

• Parameters: Group ventilation systems

• Set value: No/Yes
  The ventilation systems can be split into up to 3 groups. Splitting the individual ventilation systems into groups means that they can be controlled in groups.

• Parameters: Designation of groups Designation of groups using text.

Installer

• Parameters: Enter service code.
  Switch to installer level. Allows the ventilation system and individual ventilation systems to be configured and the key lock to be activated.

• PIN entry: 6940

• Parameters: QR code
  Link to instructions

Software version

• Parameters: Software version of control unit.

• Parameters: Software version of control
  Software version of ventilation system currently selected.

• Parameters: Serial number of ventilation system

Error memory
Display showing fault messages/errors.

Information
Display showing potential notes about filter changes or the operating status.

Unit settings menu

Basic settings can be configured in the Unit settings menu. Depending on authorisation (user), different unit parameters can be set.

Operating structure for unit settings

NOTICE Incorrect settings can cause faults and malfunctions.
Settings can only be undertaken in the installer level by authorized trained specialists in ventilation technology.
To activate the installer level, go to “Installer” field and enter the password 6940.

Basic settings

RLS 1 WR interlock

• RLS 1 WR = single control unit
• RLS 1 WR can be locked with a touchscreen control unit, the AIR@home APP or the AIR@home WebTool, all RLS 1 WR are then deactivated.
• Parameters: Control panel locks
• Set value:
• Inactive: All single control units are enabled.
• Active: All single control units are deactivated.

Room sensor configuration

• Parameters: Room sensor configuration
• Set value: External, internal, bus, control panel

The temperature determined with the selected room sensor is used as the room temperature to control the by-pass and any supplementary heating connected.

Single control unit: RLS 1 WR control unit

Solo mode only possible if no RLS T2 WS/RLS G1 WS is connected. Function not available with AIR@home APP or AIR@home web tool.

• Parameters: Single control unit: RLS 1 WR control panel
• Set value: Solo, Auxiliary, Inactive/sensor, Digital/building control system
• Solo: Ventilation unit is operated with supplied RLS 1 WR + maximum of 4 optional single control units.
• Auxiliary: Ventilation unit is operated with one optional RLS T2 WS + a maximum of 5 optional RLS 1 WR.
• Inactive/Sensor: The connections are needed for extra sensors (sensor 3 and 4). Function only if no RLS 1 WR is connected.
• Digital/building control system: A 3-level single BCS (building control system) circuit (e.g. KNX) can be constructed via an actuator for adjusting the ventilation level.

Single control unit: Blocking OFF

• Parameters: Single control unit blocking ventilation level Off
• Set value: Active, Inactive
• Active: Ventilation unit’s switch-off function with RLS 1 WR single control unit blocked.*
• Inactive: Ventilation unit’s switch-off function with
• RLS 1 WR single control unit activated.
  If the switch-off function is disabled, the ventilation unit runs with at least interval ventilation (humidity protection ventilation).

Bypass

• Parameters: Bypass
• Set value: No / Yes
  When retrofitting a bypass, activate the bypass function.

Preheating register

• Parameters: Preheating register
• Set value: No / Yes
  When retrofitting a preheating register, activate the preheating register function.

Heat exchanger type

• Parameters: Heat exchanger type
• Set value: Sensitive / Enthalpy: Depending on unit equipment
  If retrofitting, activate suitable heat exchanger type.

Acknowledgement of external safety device

• Parameters: Acknowledgement of external safety device
• Set value: Automatic / Manual: Depending on unit equipment
• Automatic: after the safety chain has been interrupted, unit operation is started automatically.
• Manual: after the safety chain has been interrupted, unit operation should be restored by means of manual acknowledgment.

Factory setting for control

• Parameters: Factory settings
• Set value: Customer level / Customer and installer level Resetting customer level
• Resetting customer level: Owner and tenant settings are reset to the factory setting. Installer settings at installer level are retained.
• Reset customer & installer level:
  Factory setting is restored (complete reset).

Ventilation settings

• Volumetric flow measurement (nominal ventilation)
• Volumetric flow Ventilation level Reduced ventilation
• Volumetric flow Ventilation level Nominal ventilation
• Volumetric flow Ventilation level Intensive ventilation EA/SA (exhaust air/supply air) adjustment Reduced ventilation
• EA/SA adjustment Nominal ventilation
• EA/SA adjustment Intensive ventilation
• Night-time cooling/flush mode
• Air volume Volumetric flow compensation (operation with exhaust air system)
• Unit filter
• Filter service life of unit filter
• Filter change of unit filter
• External filter
• Filter service life of external filter
• Filter change of external filter
• Room filter
• Filter service life of room filter
• Filter change of room filter
• Duration of ventilation level
• Motion detector overrun time
  Supply and exhaust air valves are set during initial commissioning. Open or close them to set the values specified by the planning office.

Volumetric flow measurement (nominal ventilation)

• Volumetric flow measurement (nominal ventilation)
• Parameters: Volumetric flow measurement (nominal ventilation)
• Set value: On / Off
  After activating the volumetric flow measurement, the fans are run for a maximum of 3 hours in nominal ventilation. This allows the supply and exhaust air volumetric flows in the building to be calibrated without the air volumes being changed by sensor values. The function switches off automatically after 3 hours. The function can be switched off manually.

Volumetric flow per ventilation level

The volumetric flow setting applies to both fans. With humidity protection ventilation, the fans run in intermittent operation. We recommend setting the volumetric flow for NV first.
The RV and IV volumetric flows are set automatically by the control on the basis of the NV reference value 1/3 less than (RV) and 1/3 greater than (IV).

Example: NV 90 → RV 60 → IV 120
The IV and RV control values can then be set manually. Condition: Volumetric flow > Intensive ventilation > Nominal ventilation > Reduced ventilation.

EA/SA (exhaust air/supply air) adjustment

• EA = exhaust air, SA = supply air
• Set value ex factory = 0 %

Supply and exhaust air volumes must be balanced over the entire application area. Normally the fans automatically ensure a balance and no adjustment has to be undertaken.

Nevertheless, if fan tolerances need balancing, the adjustment parameters can be used to adapt the supply air volumetric flow to that of the exhaust air.
Example: Supply air volumetric flow: measured excess = 20m³/h
EA SA adjustment: Ventilation level NV must be set to m³/h for adjustment. When setting NV, the control automatically also adjusts RV and IV. The percentage deviation for NV is transferred to RV and IV. A manual adjustment for RV and IV is also possible and the NV adjustment does not then change. A new adjustment of NV does however again result in an adjustment to RV and IV. Adjusting RV also changes the ventilation for humidity protection.
The adjustment cannot result in values falling below or exceeding minimum and maximum values for fan supply voltages.

Night-time cooling/flush mode

• Parameters: Night-time cooling/flush mode
• Set value dependent on ventilation unit type → Volumetric flow of ventilation level.
• Volumetric flow specification for the night-time cooling and flush mode functions.

Night-time cooling
Activation possible using week time program and sensor input. (Note configuration for sensor inputs). Fan opera-tion can be adjusted using specified air volume (max. 100% possible). Bypass opened if

• T room reference> maximum room temperature and
• T supply air > minimum supply air temperature,
• T outside air > 5 °C,
• Timer for supplementary heat register bypass lockelapsed.

Display note: Night-time cooling active.
If the temperature conditions mean that cooling is not possible, fan operation is interrupted for 50 min. After this time, a further attempt is made at cooling (10 minute fanoperation).

Flush mode
Unit is operated with the volumetric flow set by the user,e.g. max. air volume replacement in defined time frame.Activation possible using week time program and sensor input (note configuration for sensor inputs). Fan operation can be adjusted using specified air volume (max. M³/h possible).
Display note: Flush mode active.

Amount of air for volumetric flow compensation (Eco supply air)

• Parameters: Volumetric flow compensation

• Set value dependent on ventilation unit type → Volumetric flow of ventilation level.
  Activation using potential-free switching contact, clamped on sensor input (note configuration for sensor inputs). Supply air fan is operated with set air volume.

• Function: Is used to compensate for air from exhaust airsystems (e.g. range hood) in the room.

• Display note: Volumetric flow compensation active.

Unit filter

• Parameters: Filter service life, unit filter
• Set value: 3 to 12 months
• Parameters: Filter change, unit filter
• Set value: No / Yes

The filter service life of the unit filter is displayed (corresponds to service life of supply air fan). Once the set time interval has elapsed, a filter change message appears. If the filter is changed prematurely, the filter change must be confirmed. This is done by selecting yes under Filter change, unit filter.
The filter service life is reset. With the RLS 1 WR single control unit, the filter change interval is indicated by the central LED flashing. This is reset by pressing the two arrow keys at the same time for approx. 5 sec.

External filter

• Parameters: External filter
• Set value: No / Yes
• Parameters: Filter service life, external filter
• Set value: 3 … 6 … 18 months
• Parameters: Filter change, external filter
• Set value: No / Yes
  External filter yes activates the filter change indicator foran outside air filter upstream of the ventilation unit.
  If the filter is changed prematurely, the filter change must be confirmed. This is done by selecting yes under Filterchange´External filter´. The filter service life is reset.

Room filter

• Parameters: Room filter
• Set value: No / Yes
• Parameters: Filter service life, room filter
• Set value: 1 … 2 … 6 months
• Parameters: Filter change, room filter
• Set value: No / Yes
  Room filter yes activates the filter change indicator for the room filters in the air inlets, e.g. for exhaust air filter elements. If the filter is changed prematurely, the filter change must be confirmed. This is done by selecting yesunder Filter change´Room filter´. The filter service life isreset.

Duration of ventilation level

• Parameters: Duration of ventilation level (pause ventilation)
• Set value: 1 … 30 … 120 min
• Operating time of a manually selected ventilation level in Auto sensor or Auto time operating mode or intermittent ventilation.

Motion detector overrun time

• Set value: 5 … 12 … 120 min
  Duration of unit operation after room use is last detected by motion detector.

• Comments: If units are fitted with motion detectors, unit operation is only activated once room use is registered(motion detected).

• Exception: Auto time operating modeMotion detector is only active if it was set/activated with in the time programme. If unit operation is activated by the motion detector, the unit is always operated in a demand-driven manner based on the measurements of connectedsensors (CO2, VOC).

Ventilation time programme
Regular time program/Holiday time programme
The time programs are activated by the Auto time operating mode. The regular time programme is always activated.The holiday time programme can be activated with time limits by specifying a time range using the Start date for holiday time programme and End date for holiday time programme parameters. The Holiday time programme active notice is present for the duration of the activated holiday time programme.

• Parameters: Start holiday time
• Set value: Date entry
• Parameters: End holiday time
• Set value: Date entry

You can program a time-of-day programme with 6 time windows and assigned ventilation level/function for everyday of the week. The time-of-day programmes can be programmed individually. Alternatively, they can be pro- grammed for several days by activating the desired days of the week. Individual days can also be copied later on. The ventilation level/function activated by the weekly time program remains active until it is replaced by anotherair level/function starting within the time program.
Setting options Regular time programme/Holiday time program

Default setting in time window 1: Regular time programme = nominal ventilation (nominal), Holiday time programme = moisture protection ventila-tion (moisture protection)

Day of the week| Switching point time window

1 to 6

| Ventilation level/ Zone| From to
---|---|---|---
Monday Tuesday Wednesday Thursday Friday Saturday Sunday| 1

Settings the same for time windows 2 to 6.

| ●  Off

●  Humidity protection

●  **Reduced***

●  **Nominal***

●  Intensive

●  Night cooling

●  Flush mode

●  Sensor mode

●  Motion detector

●  Zone 1

●  Zone 2

●  Zone sensor

| 00:00

23:59

Temperature settings
Room temperature adjustment T SA min coolingMaximum room temperature Room setpoint temperature

Room temperature adjustment

• Parameters: Room temperature adjustment
  Set value: -3 … 0 … +3 K

Causes for deviation in actual room temperature:

• Unfavourable installation location for the touchscreen control unit, an external room sensor or bus room sensor.

• Exhaust air temperature sensor tolerance too high.
  This parameter can be used to adjust the actual room tem-perature. The adjustment is based on the room sensor selected under room sensor configuration .

• Example: Actual room temperature measured on touch-screen control unit = 20.3 °C. With Room temperature adjustment of -0.4 K, an actual room temperature of 19.9 °Cis displayed.

T supply air min. cooling

• Parameters: T supply air min. cooling
• Set value: 8 … 14 … 29°C
  Limits the minimum supply air temperature if cooling with by pass. Bypass sometimes closes if the set temperature is not being met. The ventilation unit regulates the supply air temperature to the set value.

Maximum room temperature The minimum temperature difference between the Room Setpoint Temperature parameter and the maximum room temperature is 2 °C. If the temperature falls below the permissible temperature difference, an automatic correction is made.

• Parameters: Maximum room temperature
• Set value: 18 … 24 … 30 °C
  The control releases cooling via the bypass when the set maximum room temperature is reached (measurement on temperature sensor).

Conditions for cooling via the bypass

• T outside air > 5° C with single control unit in solo mode and
• T outside air < T room reference and T room reference >maximum room temperature

Room setpoint temperature

• Parameters: Room setpoint temperature
• Set value: 18 … 23 … 25 °C

Sensor settings

Combi sensor operation
Adjustment of humidity combi sensor/temperature combi sensor

• Sensor 1 configuration:
• Sensor 1
• Sensor 1 type
• Sensor 1 name
• Sensor 2 configuration:
• Sensor 2
• Sensor 2 type
• Sensor 2 designation
• Sensor 2 digital function
• Sensor selection Sensor 3 and 4 configuration active if single control unit parameter switched to inactive
• CO2 limit value min
• CO2 limit value max
• VOC limit value min
• VOC limit value max
• Rel. humidity limit value min
• Rel. humidity limit value max
• Rel. humidity control voltage 0 V
• Rel. humidity control voltage 10
• V CO2 value control voltage 0
• V CO2 value control voltage 10 V
• VOC value control voltage 0 V
• VOC value control voltage 10 V

Combi sensor operation

• Parameters: Combi sensor operation
• Set value: stepped / linear
• Stepped: Rel. humidity value limit max. for intensive ventilation. The maximum value always serves as the switching point for dehumidification in the Auto Time and Auto Sensor operating modes. The minimum value is not taken into account.
• Linear: Rel. humidity limit min/max for intensive ventilation with linear humidity control in Auto Sensor operating mode. The maximum value always serves as the switching point for dehumidification in the Auto Time and Auto Sensor operating modes. The minimum limit value applies to reduced ventilation. Between RV and IV, regulation is linear, stepless and demand-driven.
  Setting also applies to nominal ventilation for single control unit (RLS 1 WR) in solo mode and linear setting. The limit value settings apply to the humidity value (optional).

For sensor limit value settings → Chapter 9.6.5, CO2-/VOC-/Rel. Humidity limit value min./max. [} 34].

Combi sensor humidity adjustment / Combi sensor temperature adjustment

• Parameters: Humidity adjustment Combi sensor
• Set value: -15 … 0 … 15 %
• Parameters: Temperature adjustment Combi sensor Set value: -3 … 0 … 3 °C
• Corrects any deviations which may arise in the combi sensor humidity/temperature value.

Configuration of sensor 1 / sensor 2

• Parameters: Sensor 1 / sensor 2 configuration
• Set value: no / yes
• Parameters: Sensor 1 / sensor 2 type
• Set value: CO2, VOC, r. h., digital, external. If digital, then start/stop, night-time cooling, flush mode, motion detector, volumetric flow compensation, supply air mode, operation with exhaust air system.
• Parameters: Name sensor 1 / sensor 2
• Set value: Sensor 1, Sensor 2, Sensor 3, Sensor 4, bathroom, WC, kitchen, bedroom, children’s room, living room, zone 1, zone 2 yes activates the connected external sensors named/specified by type. The name appears on the main control unit. If the digital type sensor parameter is selected, the 24 V supply voltage can be looped via a pushbutton and returned to the associated 0-10 V input (arrow). When the pushbutton is pressed, the ventilation unit switches to intermittent ventilation for the time stated under Duration of ventilation level. Once this time has elapsed, the ventilation unit switches back to the previously selected ventilation level. For wiring plans → Installation instructions. If flush mode is selected, the ventilation unit is operated for the duration of activation using the set air volume. Flush mode is used to rapidly overcome excess demands on ventilation. Prerequirements for night-time cooling: T room reference > maximum room temperature and T supply air > minimum supply air tem-perature, T outside air > 5 °C; Timer supplementary heat register bypass interlock elapsed. When night-time cooling is selected and the aforementioned conditions are met, the ventilation unit is operated for the duration of the activation with the set air volume with the bypass open.

Configuration of sensor 1 / sensor 2

• Parameters: Sensor 1 / sensor 2 configuration
• Set value: no / yes
• Parameters: Sensor 1 / sensor 2 type
• Set value: CO2, VOC, r. h., digital, external. If digital, then start/stop, night-time cooling, flush mode, motion detector, volumetric flow compensation, supply air mode, operation with exhaust air system.
• Parameters: Name sensor 1 / sensor 2
• Set value: Sensor 1, Sensor 2, Sensor 3, Sensor 4, bath-room, WC, kitchen, bedroom, children’s room, living room, zone 1, zone 2 yes activates the connected external sensors named/specified by type. The name appears on the main control unit. If the digital
• type sensor parameter is selected, the 24 V supply voltage can be looped via a pushbutton and returned to the associated 0-10 V input (arrow). When the pushbutton is pressed, the ventilation unit switches to intermittent ventilation for the time stated under
• Duration of ventilation level. Once this time has elapsed, the ventilation unit switches back to the previously selected ventilation level. For wiring plans → Installation instructions. If flush mode is selected, the ventilation unit is operated for the duration of activation using the set air volume. Flush mode is used to rapidly overcome excess demands on ventilation. Pre-requirements for night-time cooling: T room reference > maximum room temperature and T supply air > minimum supply air tem-perature, T outside air > 5 °C; Timer supplementary heat register bypass interlock elapsed. When night-time cooling is selected and the afore-mentioned conditions are met, the ventilation unit is operated for the duration of the activation with the set air volume with the bypass open.
• 0-10 V inputs on terminal S1+ for sensor 3 and terminal S2- for sensor 4
• 12 V supply voltage on terminals LD 1 – LD3
  The supply voltage of sensors 1 and 2 can be used for 24 V sensors. Yes activates the connected external sensors named/specified by type. The name appears on the main control unit. If the digital type sensor parameter is selected, the 12 V supply voltage can be looped via a pushbut-ton and returned to the associated 0-10 V input (S1+ or S2-) 6 Main menu settings. When the pushbutton is pressed, the ventilation unit switches to intermittent ventilation for the time stated under Duration of ventilation level. Once this time has elapsed, the ventilation unit switches back to the previously selected ventilation level.

CO2-/VOC-/Rel. Humidity limit value min./max.

• Parameters: CO2 limit value min
• Set value: 500 … 800 … 900 ppm.
• Parameters: CO2 limit value max
• Set value: 1000…1230…2000 ppm.
• Parameters: VOC limit value min.
• Set value: 500…800…900 ppm.
• Parameters: VOC limit value max.
• Set value: 1000…1230…2000 ppm
• Parameters: Humidity limit value min
• Set value: 30 … 35 … 45 % r. h.
• Parameters: Humidity limit value max
• Set value: 50 … 70 … 90 % r. h.
  With linear sensor control for ventilation (Auto Sensor operating mode), the volumetric flow varies in a continuously variable manner depending on the current CO2/VOC/rel. humidity concentration. Minimum limit values apply to reduced ventilation (RV) and maximum limit values for intensive ventilation (IV). Linear control is used between the two.

Example

For information on set value stepped or linear → Combi sensor operation [} 33].

CO2 value / VOC value / Rel. humidity Control voltage 0 V/10 V

• Parameters: CO2 value control voltage 0 V
• Set value: 0 … 800 … 900 ppm
• Parameters: CO2 value control voltage 10 V
• Set value: 900 … 1230 … 3000 ppm
• Parameters: VOC value Control voltage 0V
• Set value: 0 … 800 … 900 ppm
• Parameters: VOC value Control voltage 10V
• Set value: 900 … 1230 … 3000 ppm
• Parameters: Rel. humidity control voltage 0
• Set value: 0 … 100 % r. h.
• Parameters: Rel. humidity control voltage 10 V
• Set value: 0 … 100 % r. h.
• Control voltages 0 V and 10 V are used to define the characteristic curves of the sensors. The sensor characteristic curve must be linear.

Fireplace (ZP)
Function can be switched on with an additional circuit board ZP.

• Parameters: Fireplace safety function
• Set value: No / Yes

Activates the fireplace function if the ventilation unit is op-erated in conjunction with a fireplace. After installation, the optional additional circuit board must be switched to active with yes.

Brine EHE (ZP 1)

For additional board ZP 1 see accessories
Additional circuit board ZP 1 can be used to control a brine EHE with a regulated or unregulated pump. Parameters: Brine earth heat exchanger

• Set value: no / yes
• Parameters: Brine circulation pump regulation
• Set value: regulated / unregulated
• Parameters: T air inlet offset heating
• Set value: 0 … 2 … 5 K
• Parameters: T air inlet, hysteresis heating
• Set value: 1 … 6 K
• Parameters: T air inlet, hysteresis cooling
• Set value: 2 … 6 K
• Requirements for the use of ZP 1
• DIP switch of ZP 1 set to brine earth heat exchanger and activated with brine earth heat exchanger parameter.

Conditions for heating

Switch on brine CP when

• T air inlet (air temperature in outside air connector) < minimum air inlet temperature (factory setting) + T air inlet offset heating.

Switch off brine CP with unregulated pump when

• T air inlet (air temperature in outside air connector) > minimum air inlet temperature (factory setting) + T air inlet offset heating + 1 K.

Switch off brine CP with regulated pump when

• the control voltage has fallen to 0 V.

Conditions for cooling

Switching on brine CP
The air is cooled when all 3 conditions are met:

• Summer season. Does not apply to single control unit (RLS 1 WR) in solo mode because the Season parameter is not queried.
• TR (room temperature) > set maximum room temperature → Room temperature adjustment [} 33] + 1 K
• T air inlet (air temperature in outside air connector) > T supply air min cooling → T supply air min. cooling [} 33] + T air inlet hysteresis cooling.

To prevent the circulation pump from synchronising, the temperature at the air inlet must be greater than the minimum air inlet temperature by the set amount of hysteresis.

Switching off brine CP
The air is no longer cooled if one of the following conditions is met:

•  TR (room temperature) < set maximum room temperature → Room temperature adjustment [} 33] or
• T air inlet (air temperature in outside air connector) < T supply air min cooling → T supply air min. cooling [} 33] The circulation pump switches off if the temperature at the T air inlet sensor falls below the minimum T air inlet because the minimum supply air temperature T supply air min. cooling cannot be maintained.
  With a regulated pump, when the switchon temperature is reached, a defined voltage is set so that the T supply air min. cooling is reached. The temperature can then be maintained with the minimum use of energy. The pump is switched off as soon as the defined voltage falls to 0 V, as input on the control.

Zone ventilation (ZP1)

For additional board ZP 1 see accessories
To activate, switch additional circuit board 1 to zone ventilation with the DIP switches and set the Zone ventilation parameter to yes.

• Parameters: Zone ventilation
• Set value: no / yes
• Parameters: Reducing volumetric flow
• Set value: 0 … 30 … 60 %
• Parameters: Sensor zone 1
• Set value: 0 … 4
• Parameters: Sensor zone 2
• Set value: 0 … 4
• Parameters: Rotational direction
• Set value: right
• Parameters: Deviation from middle position
• Set value: -90 … 0 … 90 °
• Parameters: Deviation from end stop Zone 1*
• Set value: 0 … 90 °
• Parameters: Deviation from end stop Zone 2*
• Set value: -90 … 0 °

Positive values in direction of zone 2, Negative values in direction of zone 1
The zone ventilation distributes the air volumes over two room zones (external zone shutter needed).
If Auto Time operating mode is selected, the ventilation time programme (→ Ventilation time programme) runs with the time windows and ventilation levels programmed for zone 1 and zone 2.
If zone ventilation is activated, the volumetric flow is reduced by the set percentage.

Zone ventilation with sensor control
Only wired sensors can be used (CO2, VOC, humidity types).
If sensors are installed in both zones, a sensor control can be set → Ventilation time programme, ventilation time programme, Zone Sensor setting.
The room zone saved in the time programme or the room zone with the poorer measured air quality receives the larger air volume. The other zone receives the minimum air exchange needed for hygiene.
This can be adapted to the requirements by changing the limit stops of the zone shutter.

Configure zone ventilation as follows

• Same pressure losses in both supply air channels
• Pressure losses of less than 50 Pa

3-way air shutter (ZP 1)
For additional board ZP 1 see accessories
To activate, switch additional circuit board 1 to 3-way air shutter with the DIP switches and set the 3-way air shutter to yes.

• Parameters: 3-way air shutter
• Set value: No / Yes
• Parameters: Lower temperature limit
• Set value: -10 … 5 … 10°C
• Parameters: Upper temperature limit
• Set value: 15 … 20 … 30°C
• Parameters: Hysteresis
• Set value: 2 … 6 K
  For additional information about the 3-way air shutter → Air earth heat exchanger 3-way air shutter.

Above or below the set temperature limits (in relation to outside temperature), the 3-way air shutter is set so that the air is guided via the air earth heat exchanger and cooled or heated.
If temperatures are within the limit values, the air is drawn in directly from outside without passing through the air earth heat exchanger. The extra outside air temperature sensor needed (PT 1000) is connected on the additional circuit board.

Supplementary heating (ZP 1)
For additional board ZP 1 see accessories

• Parameters: Supplementary heating
• Set value: no / yes
• Parameters: Hysteresis setpoint temperature
• Set value: 0.1 … 0.3 … 1 K
  For additional information about the supplementary heating → Supplementary heating control .
  Supplementary heating, e.g. using an electric or hydraulic heat register. The Hysteresis setpoint temperature para-meter can still be set for adjustment purposes. The hysteresis relates to the room setpoint temperature set in the short code menu.

Pressure consistency (ZP 2)
For additional board ZP 2 see accessories
The ventilation levels and operating modes cannot be adjusted in operation with constant pressure. The functions are disabled.
If `Operation with constant pressure´ parameter set to yes→ initialisation: Ventilation unit runs for 3 minutes with reference volumetric flow and determines the pressure in the air duct. Then the fan selected using the DIP switch runs at the duct pres-sure established. The other fan conveys the same volumetric flow.
The fans can also be controlled with constant pressure (rather than constant volumetric flow).
The pressure is measured in the supply air or exhaust air duct, depending on where the pressure sensor is installed. The relevant fan is controlled as the master fan, the other (slave fan) is operated with the same volumetric flow as the master fan.

To activate operation with constant pressure and to enter the limit values for pressure consistency regulation. When the pressure loss at the supply air duct changes (e.g. switching over to disk valve), the pressure changes and the master fan again regulates to reference pressure.

Reference volumetric flow
The reference volumetric flow can be set in the `Pressure consistency´ parameter group.
To set a desired volumetric flow in nominal ventilation, fully open all valves. The unit is initialised and determines the drop in pressure at the differential pressure sensor with set volumetric flow (reference pressure).
The ventilation unit is controlled such that the reference pressure remains stable within a defined tolerance range.

Reference pressure
The reference pressure can be set in the `Pressure consistency´ parameter group.
Enter the pressure calculated by the planning office here. This is kept constant during operation.

• Parameters: Pressure consistency
• Set value: no / yes
• Parameters: Reference
• Set value: Pressure / volumetric flow
• Parameters: Reference volumetric flow
• Set value: m³/h
• Parameters: Pressure
• Set value: 10 – 200 Pa

Filter monitoring (ZP 2)
For additional board ZP 2 see accessories

• Parameters: Filter monitoring
• Set value: No / Yes
• Parameters: Permissible delta p
• Set value: 30 – 100 %
• Parameters: Start initialisation Filter characteristic curve Alternative monitoring of filter usage times using pressure measuring sensor.
  This involves determining a differential pressure and saving a pressure loss characteristics curve for every volumetric flow (HPV, RV, NV, IV) with clean filters.
  The `Permissible delta p´ parameter specifies the maximum permissible increase in pressure in %.
  Before activating filter monitoring, be sure to insert new air filters in the ventilation unit.

If the `Filter monitoring´ parameter is set to yes, the ventilation unit is set to the current pressure loss – the unit runs through the entire volumetric flow range from RV to IV for 10 minutes.
This initialisation sequence takes place whenever a filter change is acknowledged.
For additional information about filter monitoring → accessories instructions.

EnOcean wireless (E-SM plug-in module) Parameters: EnOcean wireless

• Set value: no / yes
• Parameters: Teaching mode
• Set value: inactive / active
• Parameters: Unit list
• Set value: inactive/active
• Parameters: Teach-out units
• Set value: Here you can either teach out all or just individual EnOcean wireless units.
  For additional information about the EnOcean wireless plug-in module E-SM → EnOcean/KNX plug-in modules or accessories instructions.

KNX (plug-in module K-SM)

• Parameters: KNX
• Set value: no / yes
• For additional information about the KNX plug-in module K-SM → EnOcean/KNX plug-in modules accessories instruc-tions.

BACnet
https://www.maico-ventilatoren.com/service/down-loads

Switching test

• Parameters: Supply air fan
• Set value: Off / On
• Parameters: Exhaust air fan
• Set value: Off / On
• Parameters: Preheating register
• Set value: Off / On
• Parameters: Switching contact Basic circuit board (main board)
• Set value: Off / On

Internet

• Parameters: IP address configuration
• Set value: Static / Dynamic DHCP (factory setting) Parameters: IP address
• Setting value: dynamic
• Parameters: Subnet mask
• Setting value: dynamic
• Parameters: Gateway
• Set value: —
• Parameters: DNS
• Set value: —
• Parameter: air@home
• Parameters: No / Yes
• Parameters: Web server reset login
• Set value: reset / do not reset

Main menu value call-up

Current system values, such as temperature and humidity measurement values or system statuses, can be retrieved in the main menu value call-up.

Operating structure for call-up

Ventilation

external filter has to be changed
Time remaining until unit fil- ter change| Remaining time (days), until unit filter has to be changed
Time remaining until room filter change| Remaining time (days), until room filter has to be changed

Temperatures

sensor configura- tion [  31]. A set Room temperature adjustment is taken into account
T outside air upstream of EHE| Room temperature measured at an external room sensor. A set Room temper ature adjustment is taken into account
T air inlet, unit| Measured outside air temperature downstream of brine earth heat exchanger and/or at unit input
T supply air| Supply air temperature measured in the unit
T exhaust air| Exhaust air temperature measured in the unit (combi sensor)
T outgoing air| Outgoing air temperature measured in the unit

Sensors

unit measured with combi sensor. A correction value set under Combi sensor humidity adjustment is taken into account.
Value of sensor 1| Saved sensor type, its room assignment or the current measurement or selected function and its status.
Value of sensor 2| Saved sensor type, its room assignment or the current measurement or selected function and its status.
Value of sensor 3| Saved sensor type, its room assignment or the current measurement or selected function and its status.
---|---
Value of sensor 4| Saved sensor type, its room assignment or the current measurement or selected function and its status.
Sensor for relative humidity

r. h. external (KNX or Modbus)

| Saved sensor type, its room assignment and the current measured value. These sensors are also taken into account in Auto Sensor mode.
Sensor for air quality AQ , external (KNX or Modbus)| Saved sensor type, its room assignment and the current measured value. These sensors are also taken into account in Auto Sensor mode.

Switching statuses (outputs)

closed.
Supplementary heating relay (ZP 1)| Supplementary heating relay active or inactive

Operating hours
Current runtime/operating hours of ventilation levels and selected components.

protection ventila- tion
Reduced ventilation level| Operating hours of fans in reduced ventilation
Nominal ventilation level| Operating hours of fans in nominal ventilation
Ventilation level Intensive ventilation| Operating hours of fans in intensive ventilation.
Total ventilation| Total operating hours of the two fans
Heat register| Operating hours of heat re- gister
Switching contact Basic cir- cuit board (main board)| Operating hours of switch- ing contact
Brine circulation pump (ZP 1)| Operating hours of brine cir- culation pump
Zone shutter (ZP 1)| Operating hours of zone shutter
3-way air shutter (ZP 1)| Operating hours of 3-way air shutter
Supplementary heating re- lay (ZP 1)| Operating hours of supple- mentary heat register relay

Internet

• IP configuration
• IP address
• Subnet mask
• Gateway
• DNS
• AIR@home

EnOcean wireless

1. In the EnOcean wireless menu, select 3rd units list
2. Once a unit is selected, the list of components appears with detailed information about the EnOcean wireless unit, such as EEP code, name etc.

Fault messages
The last five active faults are displayed in the Faults menu. Supply air fan

Exhaust air fan
Communication main control panel (= Touchscreen control unit or Comfort single control unit)

• Sensor: T exhaust air
• Sensor: T air inlet, unit
• Sensor: T outgoing air
• Sensor: T supply air
• Sensor: T room BUS
• System memory
• System bus
• Combi sensor
• Additional circuit board 1
• Additional circuit board 2
• Bypass
• Supply air temperature too cold
• Exhaust air temperature too cold
• Frost protection
• Zone shutter
• External pre-heating
• Pressure constancy setpoint not reached

To remedy faults, please contact the specialist electrical installer responsible for operating your unit.

Information
Notes provide information on current system statuses.

Special functions

Excess humidity protection
Excess humidity protection protects the residential unit from excess humidity. If the exhaust air humidity exceeds
the set humidity limit value (→ Sensor settings [} 33]), the ventilation unit switches to intensive ventilation until the room air humidity has fallen to 3 % below the set max. limit value. The ventilation unit then switches back to the last ventilation level used.
The maximum humidity limit value can be set from 50 to 70 % r. h. → Sensor settings [} 33].
This function is always active and cannot be dis-abled. Exception: In Eco mode supply air, excess humidity protection is deactivated.
The controller only activates excess humidity protection if the outside air has an absolute hu-midity lower than that of the exhaust air.

Auto Sensor operation
Demand-driven operation.
Activates the automatic operation, with sensor control, so that hygienic, perfect ventilation is ensured. The ventila-tion control takes place based on the humidity and/or CO2/VOC air quality values. The automatic mode is deac- tivated for a limited period of time if the ventilation level is manually adjusted. The duration of manual operation de-pends on the Duration of Ventilation Level parameter.
The operating mode can be selected from any main control unit (touchscreen control unit, APP, web tool). If nominal ventilation is called up with a single RLS 1 WR control unit (in Solo mode), the ventilation unit also switches to Auto Sensor.

Bypass
Units with a bypass are equipped with a bypass controller. This ensures passive cooling of the building (if the bound-ary conditions for this are met) and when cooling, ensures that the temperature does not fall below the minimum supply air temperature → Temperature settings Maximum Room Temperature parameter and Cooling Supply Air T parameter.

Frost protection strategies
Units with preheating register: If the heater power rating is not sufficient under extreme con-ditions (high volumetric flow and very low outside temperature), the ventilation unit switches back one ventilation level.

Units with preheating register
The preheating register keeps the unit free of frost and protects the heat exchanger from icing over. The ventila-tion unit controls the temperature at the unit inlet to the minimum air inlet temperature (factory setting).
If the outgoing air temperature falls below the outgoing air min. value set in the factory, despite the presence of the preheating register, the ventilation unit switches off. A frost protection fault appears on the control unit.

Units with preheating register and enthalpy heat exchanger
Units with preheating register and enthalpy heat ex-changer have a special frost protection strategy. The combi sensor fitted in the exhaust air duct of the ventilation unit determines the exhaust air humidity. The freezing temper- ature is calculated on the basis of the exhaust air humidity and the current volumetric flow.
The preheating register controls the unit inlet temperature using this calculated value + an offset so that the enthalpy heat exchanger cannot freeze. The enthalpy heat ex-changer reaches a freezing temperature when the unit in-let temperature is between -5 °C to -12 °C, depending on humidity and volumetric flow.

Units with preheating register and addi-tional pre-heating
If pre-heating (brine earth heat exchanger, electric heating register) is also fitted upstream and controlled via the unit controller, the pre-heating ensures that the unit remains free of frost.
The pre-heating switches on if the temperature falls below the minimum air inlet temperature (factory setting) + T air inlet offset heating.
Should the air inlet temperature fall to the minimum air in-let temperature despite this, the preheating register is also activated.

Contact for external safety device
An external safety device (differential pressure controller, smoke detector, fire alarm control panel) can be connec-ted to terminal X2 (12 V).

Air-ventilated fireplaces
If the ventilation unit is being operated at the same time as an air- ventilated fireplace, a differential pressure control-ler is needed as the safety device. The differential pressure controller prevents the ventilation system from being op-erated if the air pressure in the fireplace’s installation area falls by the permitted pressure in relation to the flue draught.
If this happens, the ventilation unit switches off. The differ-ential pressure controller is connected as a normally closed contact. When the impermissible partial vacuum is reached, the differential pressure controller opens and thereby directly interrupts the current supply to the fans. An electric heat register, if present, shuts off too.
The message External safety shutdown triggered appears on the control unit.
If the differential pressure controller is closed, the ventila-tion unit starts up again.

External safety device
If the safety device connected to terminal X2 (12 V) is triggered (pressure error, smoke etc.), the ventilation unit shuts down automatically → parameter Acknowledge-ment of external safety device [} 31].

Switching test
A switching test can be used to check the following unit or accessory components.

• Supply air / outside air fan
• Exhaust air / outgoing air fan
• Bypass shutter
• Heat register (on main board)
• Switching contact Basic circuit board (main board)
• Brine circulation pump (with ZP 1)
• Zone shutter, zone 1 and 2 (with ZP 1)
• 3-way air shutter (with ZP 1)
• Supplementary heating relay (with ZP 1)

You receive information as to whether the components are currently switched on or off and/or are open or closed.

Operation via app / web tool

1. Make the connection as described in the installation in-structions for the ventilation unit. In addition, set the AIR@home parameter to yes under Settings/Internet using the commissioning software or the RLS T2 WS.
2. Call up AIR@home web tool (www.air-home.de) or AIR@home APP.
3. Log in with the access details emailed to you during re-gistration.

Factory settings
Any settings made on the unit will be irretriev-ably lost when the unit is reset to the factory set-tings. Back up the data with the commissioning software before resetting.
The unit settings can be reset with the two factory settings functions.

Resetting customer & installer level
Complete factory setting, all unit parameters are reset to the factory settings.

Resetting customer level
All settings undertaken at customer level are reset to fact-ory setting. The settings undertaken in the installer menu are retained.

Functions of additional circuit board ZP 1

There are 2 slots for optional additional circuit boards (ZP 1 or ZP 2) on the control console. Any combination of cir-cuit boards is possible. Installation is as described in the ac-cessories instructions.
DIP switch setting options on ZP 1 (only 1 function can be set)

• Brine EHE
• Zone ventilation
• 3-way air shutter
• Supplementary heating

Brine earth heat exchanger control
The outside air can be heated in the winter and cooled in the summer with a brine earth heat exchanger.
No extra temperature sensor is needed to control the brine circulation pump (controlled or uncontrolled brine CP). This is handled by the air inlet temperature sensor in the ventilation unit.
In heating mode, the brine circulation pump is controlled using the unit- specific frost protection strategy.
For further information → Frost protection strategies [} 37] and Brine EHE (ZP

1. [} 34].

Zone ventilation
Units with zone ventilation can feed different amounts of the volumetric air flow provided into 2 room zones. For ex-ample, in zone 1 (living areas) and zone 2 (bedrooms). The volumetric flow of one zone can be reduced by up to 60 %.
Zone ventilation is only active in the Nominal ventilation ventilation level. It is deactivated in the other ventilation levels or if the bypass is open.
Zones 1 and 2 are set in the Auto Time operating mode using a time programme. 4 time segments can be saved per day with supply air volumes defined for zones 1 and 2.
The zone sensor is set in the Auto Time operating mode using a time programme. The air quality values determined with CO2 and/or VOC and humidity sensors are used for demand-based zone ventilation. The ventilation unit con-trols the amounts of supply air automatically. 4 time seg-ments can be saved per day with supply air quality defined for the zone sensor.
For further information → Zone ventilation (ZP1) and Ventilation time programme [} 32].

3 Air earth heat exchanger 3-way air shutter
The 3-way air shutter controls the transport of outside air from outside via an earth-air heat exchanger or directly. The air shutter is opened or closed for this purpose.
During the transitional times in particular, instances may occur when the outside temperature is warmer than the temperature of air passing through the earth heat ex-changer. If heating, this means that the outside air can be used more efficiently than the outside air passing through the earth heat exchanger.

Above and below the set temperature limits, the outside air is drawn in via an earth-air heat exchanger.
For further information → 3-way air shutter (ZP 1).

Supplementary heating control
NOTICE Incorrect installation will result in unit damage. If supplementary heating is selected, the power supply for the component should be switched via an external relay.
NOTICE Unit damage from incorrectly connecting the power supply.
The load current must be provided via an external supply. The load current must not be switched via the main board.
For further information → Supplementary heating (ZP 1)[} 35].

Functions of additional circuit board ZP2

There are 2 slots for optional additional circuit boards (ZP 1 or ZP 2) on the control console. Any combination of cir-cuit boards is possible. Installation is as described in the ac-cessories instructions.

DIP switch setting options on ZP 2 (only 1 function can be set)

• Pressure constants for controlling the fans
• Filter monitoring via pressure measuring sensor

Pressure constants for controlling the fans
For further information → Pressure consistency (ZP 2)[} 35].
The ventilation levels and operating modes can-not be adjusted in operation with constant pres-sure. The functions are disabled.
If `Operation with constant pressure´ parameter set to yes→ initialisation: Ventilation unit runs for 3 minutes with reference volumetric flow and de- termines the pressure in the air duct. Then the fan selected using the DIP switch runs at the duct pres-sure established. The other fan conveys the same volumetric flow.
The fans can also be controlled with constant pressure (rather than constant volumetric flow). The pressure is measured in the supply air or exhaust air duct, depending on where the pressure sensor is installed. The relevant fan is controlled as the master fan, the other (slave fan) is op-erated with the same volumetric flow as the master fan.
To activate operation with constant pressure and to enter the limit values for pressure consistency regulation.
When the pressure loss at the supply air duct changes (e.g. switching over to disk valve), the pressure changes and the master fan again regulates to reference pressure.

Reference volumetric flow
The reference volumetric flow can be set in the Pressure Constancy parameter group.
To set a desired volumetric flow in nominal ventilation, fully open all valves.
The unit is initialised and determines the drop in pressure at the differential pressure sensor with set volumetric flow (reference pressure).
The ventilation unit is controlled such that the reference pressure remains stable within a defined tolerance range.

Reference pressure
The reference pressure can be set in the Pressure Con-stancy parameter group.
Enter the pressure calculated by the planning office here. This is kept constant during operation.

Filter monitoring with pressure measuring sensor
For further information → Filter monitoring (ZP 2) [} 35].
Alternative monitoring of filter usage times using pressure measuring sensor. This involves determining a differential pressure and saving a pressure loss characteristics curve for every volumetric flow (HPV, RV, NV, IV) with clean fil-ters.
With the Permissible Delta p parameter, the maximum per-missible increase in pressure is specified in %.
Before activating filter monitoring, be sure to insert new air filters in the ventilation unit.
If the Filter monitoring parameter is set to yes, the ventilation unit is set to the current pressure loss – the unit runs through the entire volumetric flow range from RV to IV for 10 minutes.
This initialisation sequence takes place whenever a filter change is acknowledged. For additional information about filter monitoring, see accessories instructions.

EnOcean/KNX plug-in modules
EnOcean components
Install plug-in module in accordance with the accessory in-structions.

KNX components
The installer level cannot be selected via KNX. Use the commissioning software, the AIR@home APP or the AIR@home web tool for this.
For parameters and possible functions → accessories in-structions.

Cleaning/maintenance

Cleaning and maintenance work may only be carried out by the specialist installer → Safety in-structions supplement.

• Clean or service the ventilation unit at least every 2 years.
• Never operate the ventilation unit without an air filter.
• Only use original air filters.

CAUTION Risk of burning from hot housing parts on ventilation units with preheating register.
Do not touch the heat register. Wait until the heat register and the housing parts have cooled off.

Changing air filters
When a filter change is due, the LED of ventilation level II flashes regularly at longer intervals on the RLS 1 WR. A fil-ter change indicator appears on RLS T2 WS touchscreen control unit. Ventilation level II flashes regularly on the RLS G1 WS.
Change the air filter when the filter change indicator ap-pears.
For information on filter changes → operating instructions.

Cleaning the condensate drain and siphon

• Cleaning interval: Every 2 years

• Fill the siphon up with water after long dry periods.

  1. Switch off ventilation unit with main switch, disconnect at all poles from the power supply, secure against being accidentally switched back on and position a visible warning sign.

  2. Loosen the two quick-release locks and remove the front cover.
     Note information on sticker.

  3. Remove deposits from condensate drain area and flush drain pipe. The siphon must be filled with water so that the ventilation unit does not draw in infiltration air.

  4. Attach front cover and secure with both quick-release clips.

  5. Switch on the ventilation unit.

Cleaning heat exchanger and unit inside

Cleaning interval: Every 2 years

1. Switch off ventilation unit with main switch, disconnect at all poles from the power supply, secure against being accidentally switched back on and position a visible warning sign.

2. Removing the front cover(s). Note information on sticker.
   NOTICE The sealing strip will be damaged if the heat ex-changer is pulled out or inserted at an angle.
   Do not twist heat exchanger. Do not move the ventilation unit.

3. Pull heat exchanger carefully and evenly out of ventila-tion unit.

4. Vacuum the sensitive heat exchangers with a standard vacuum cleaner.
   Thoroughly flush enthalpy heat exchanger with water or soapy water, drip off and let it dry well.

5. Wipe down the interior walls of the ventilation unit with a cleaning cloth.

6. Carefully slide heat exchanger into housing until stop is reached → position sticker.

7. Attaching the front cover(s).

8. Switch on the ventilation unit.

Fault rectification

Fault rectification is only permitted by the spe-cialist installer → Safety instructions supplement.
Fault messages are displayed on the control units, of the
APP or the web tool.
In the event of a fault, the ventilation unit switches to emergency mode. The fault symbol along with the time and date of the fault appear on screen. All 3 LEDs flash on the RLS 1 WR.

Safety shutdown

Timer for fault messages
The control only reacts to a sensor failure after 10 minutes. Wait 10 minutes after acknowledging a temperature sensor error and then check the temperature value for plausibility. Inform your specialist installer if the error is still present.

Supply air temperatures too low
If the supply air temperature falls to 5 °C, the ventilation unit shuts down completely for reasons of safety. The fault message Supply air T too cold is displayed on the
RLS T2 WS. All 3 LEDs flash on the RLS 1 WR. If the supply air temperature again increases to at least 10 °C, the vent-ilation unit starts up automatically.

Exhaust air temperatures too low
If the exhaust air temperature falls below 12 °C, the ventilation unit shuts down to prevent rapid, unwanted cooling of the building. If this happens, there is a malfunction in the external heating system.

Fault LEDs on the main board

specialist installer.
Green LED flashes slowly| Normal operation, trouble- free
No display| Main controller defective. Replace controller.

Fault messages
The tables below show potential faults and their causes. Column 3 Ackn. indicates whether or not the fault must be acknowledged after it has been eliminated.

• M: The fault elimination must be acknowledged manu-ally.
• RLS 1 WR: Press both arrow keys at the same time for 3 seconds.
• RLS T2 WS: Acknowledge fault clearance on the display. RLS G1 WS: Press both ventilation level buttons at the same time for 3 seconds.
• Only then is the ventilation unit operable again.
• A: The correction of a temperature sensor malfunction is recognised by the control. The ventilation unit then continues to operate automatically.

Fan defective

| M
Exhaust air fan| Exhaust air fan fault Cable break

Fan defective

| M
---|---|---
Communica- tion with main control unit (touch- screen con- trol unit)| Fault in communication with main control unit

Cable break

Main control unit (RLS T2 WS, RLS G1 WS) defective

Wiring incorrect

| A
Sensor: T- outside air upstream of EHE| Temperature sensor fault, up- stream of earth heat exchanger (EHE)

Cable break

Temperature outside measuring range

| A
Sensor: T air inlet, unit| Unit inlet temperature sensor fault Cable break

Temperature outside measuring range

| A
Sensor: T out- going air| Outgoing air temperature sensor fault

Cable break

Temperature outside measuring range

| A
Sensor: T supply air| Supply air temperature sensor fault Cable break

Temperature outside measuring range

| A
Sensor: T room ex- ternal| External room temp. sensor fault Cable break

Temperature outside measuring range

| A
Sensor: T room control unit| Temperature sensor control unit fault

Cable break

Temperature outside measuring range

Main control unit (RLS T2 WS, RLS G1 WS) defective

| A
Sensor: T room bus| Temperature sensor KNX fault

No data telegram for room temper- ature in the last 15 minutes

| A
---|---|---
System memory| System memory fault

Checksum error of stored para- meter, load commissioning data

| M
System bus| System bus fault

Internal error, call in a trained spe- cialist

| A
Combi sensor (exhaust air humidity/ temperature)| Humidity/temperature sensor ex- haust air fault

Cable break

Humidity/temperature outside measuring range

| A
Additional circuit board ZP1| ZP 1 communication fault Cable break

ZP1 defective

Incorrect DIP switch setting on ZP 1

| A
Additional circuit board ZP2| ZP 2 communication fault Cable break

ZP 2 defective

Incorrect DIP switch setting on ZP 2

| A
Bypass| Bypass fault Motor defective

Foreign body blocks mechanics

| M
Supply air temperature too cold| Temperature of supply air too cold Heat exchanger iced up

Preheating register defective

| A
Exhaust air temperature too cold| Temperature of exhaust air too cold

Exhaust air in unit too cold, apart- ment cooled

| A
Frost protec- tion| Frost protection fault Cable break

Heating module defective

Temperature switch on the heat re- gister defective

| M
Zone shutter| Shutter fault| M
 | Motor defective

Foreign body blocks mechanics

|
---|---|---
External pre- heating| External pre-heating fault, external pre-heating defective| M
Pressure con- stancy set- point not reached| Fault pressure constancy, setpoint is not reached| M

Causes for sensor errors
A sensor error is reported if the measured temperature value is outside the measuring range or no sensor value is detected.

Causes of error for sensor errors

• Cable break
• Temperature outside measuring range (out of range)

As soon as the error is rectified, it is automatically acknow-ledged.

Information
Display of the current information with date/time.

tripped by an impermissible partial va- cuum.
The unit switches off! Switching test active.| A switching test is being per- formed.
Forced operation active| Cyclic forced operation act- ive. Any pumps and servo- motors present are activ- ated briefly to avoid them seizing up.
---|---
Frost protection, volumetric flow regulation| The heater power rating of the preheating register is too low for the current volu- metric flow or the current outdoor temperature. The volumetric flow is therefore reduced to achieve the min- imum air inlet temperature needed for frost protection.
Max. humidity value limit exceeded| The set max. humidity limit value was exceeded, excess humidity protection (in- crease in volumetric flow) is active.
Volumetric flow measure- ment active| Fans are operated in nom- inal ventilation level for a maximum of 3 hours.
Brine EHE, low cooling capa- city| The cooling capacity of the brine EHE is too low. No cooling effect is achieved. Pump is blocked for one hour.
---|---
Communication: EnOcean| There is no communication between the EnOcean plug- in module and the main cir- cuit board.
Communication KNX| There is no communication between the KNX plug-in module and basic circuit board.
Internet communication| There is no communication with the internet.
Communication ModBus| There is no communication with the Modbus compon- ents.
External safety shutdown| A connected external safety contact has tripped (ter- minal X2). There is no bridge on the control circuit board. The unit switches off.

Spare parts

Important information when ordering spare parts:

• Article number
• Unit type
• Ventilation unit serial number

For inquiries, contact
Maico Elektroapparate-Fabrik GmbH Steinbeisstraße 20 78056 Villingen- Schwenningen,

1

| Micro-fuse, separate| 0157.0889.0000
---|---|---
15| EnOcean plug-in module E-SM| 0192.0556
16| K-SM KNX plug-in module| 0192.0557
17| Condensate elbow with redu- cer| 0093.1247.9000
18| Fan| 0156.0127.0200
19| Sensor PT-1000| 0157.1244.0000
20| Bypass shutter, complete:|
 | Right-hand version| 0018.1089.9000
 | Left-hand version| 0018.1100.9000
21| Actuator drive for bypass| 0157.1177.0000
22| Frost protection heating cover grille| 0150.0336.0000
23| Humidity sensor, cpl.| 0093.1270.0000
24| Antifreeze heating| 0157.1187.0000
25| Front cover with bypass chan-|
 | nel:| E018.1079.9000
 | Right-hand version| E018.1079.9100
 | Left-hand version|
26| Sensitive heat exchanger:|
 | Right-hand version| E192.0570.9000
 | Left-hand version| E192.0570.9100
27| Enthalpy heat exchanger,|
 | WSET 170:| E192.0612.9000
 | Right-hand version| E192.0612.9100
 | Left-hand version|
28| 1x WSF 170 pollen filter, filter class F7| 0093.0271

0093.0272

 | Alternatively: 1x WSF-AKF 170

active carbon air filter, class F7

|
29| 10x WSG 170 spare air filter, class G4| 0093.0270
30| Push-in frame for G4 filter| 0093.0269

Disassembly, environmentally sound disposal

Old devices and electronic components may only be dismantled by specialists with electrical training. Proper disposal avoids detrimental impact on people and the environment and allows valuable raw materials to be reused with the least amount of environmental impact.

Do not dispose of the following components in household waste!
Old devices, wearing parts (e.g. air filters), defective components, electrical and electronic scrap, environmentally hazardous liquids/oils, etc. Dispose of them in an environmentally friendly manner and recycle them at the appropriate collection points (→ Waste Disposal Act).

1. Separate the components according to material groups.
2. Dispose of packaging materials (cardboard, filling materials, plastics) via appropriate recycling systems or recycling centres.
3. Observe the respective country-specific and local regulations.

Company information
© Maico Elektroapparate-Fabrik GmbH. Translation of the original operating instructions. Misprints, errors and technical changes are reserved.

FAQ:

Q: How do I update the software version?
A: To update the software version, refer to the instructions provided in the manual for detailed steps on upgrading the system.

Q: Can I use third-party sensors with WS 170?
A: WS 170 is designed to work with compatible sensors mentioned in the manual. For third-party sensor compatibility, please refer to the manufacturer’s guidelines or consult customer support.

Q: What should I do if I encounter an error message?
A: If you encounter an error message, check the error log in the system settings first. Follow the troubleshooting steps outlined in the manual or contact customer support for assistance.

Tel. +49 7720 694 445
Fax +49 7720 694 175
E-mail: ersatzteilservice@maico.de
When replacing the main board (on the electronics slide-in module), the unit serial number must be assigned to the circuit board. The assignment is only possible with the commissioning software.

References

• toren.com
• Maico – Log in
• Spezialist für Ventilatoren und Lüftungslösungen | MAICO

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