Airflow 90001254 User manual

80001028 –Issue 1 11/20
MultiPlexBox Touchscreen
Controller
Part No: 90001254
Manual on the correct usage, maintenance, and
installation of the MultiPlexBox touchscreen controller

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1. Contents
Contents
Contents............................................................................................................................................................................. 2
1.0General Information.................................................................................................................................................... 3
2.0 Installation.................................................................................................................................................................... 7

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1.0 General Information
To ensure complete and effective operation and for your own safety, all the following instructions should be
read carefully and observed. The relevant national standards, safety regulations and instructions as well as
the technical connection conditions of the energy supply company must be observed and applied. Keep the
Installation and Operating Instructions as a reference with the unit. After the final assembly, the document
must be handed out to the operator (tenant/owner).
1.2 Warranty and Liability claims
To safeguard the guarantee and liability claims of the customer, the following must be observed: Installation
and use according to the Installation and Operating Instruction manual. The use of accessories, which are
not approved, recommended, or offered by Airflow Developments, is not permissible. Any damages are
excluded from the guarantee. If these instructions are not observed, all warranty claims are excluded. This
also applies to any liability claims extended to the manufacturer.
1.3 Regulations
If the product is installed correctly and used to its intended purpose, it conforms to all applicable regulations
including UKCA and CE guidelines at its date of manufacture.
1.4 Receipt
Please check delivery immediately on receipt for accuracy and damage. If damaged, please notify the carrier
immediately. In case of delayed notification, any possible claim may be void.
1.5 Storage
When storing for a prolonged time, the following steps are to be taken to avoid damaging influences:
Protection by dry, air-dustproof packing (plastic bags with drying agent and moisture indicators). The storage
place must be waterproof, vibration-free and free of temperature variations. Damages due to improper
transportation, storage or commissioning must be verified and are not liable for warranty.
1.6 Area of application
The controller referenced in this manual is intended for controlling the MultiPlexBox by Airflow
Developments. It is not a ready-to-use product and it may only be operated once the ventilation system has
been properly installed and connected. The controller is designed for flush mounting in an empty socket with
a diameter of 68mm. Any use other than the intended use is prohibited!
1.7 Disposal
Dispose of all components in an environmentally friendly manner in accordance with the local codes,
practices, and environmental regulations in your area. An authorised specialist waste processing company
must dispose of the unit or the individual components. The appointed contractor must ensure that:
−The components are separated according to material types and recycled where possible.
−The used operating materials are sorted and separated according to their respective properties. The
controller contains batteries or accumulators.
We are obliged to point out the following: Batteries and accumulators are subject to regulation regarding their
disposal. Please ensure all batteries are disposed of responsibly. Batteries or accumulators that contain
harmful substances are labelled with the symbol of a crossed-out waste bin. The chemical symbol of the
harmful substance is specified as such: Cd for Cadmium, Pb for Lead and Hg for Mercury.
1.1 Warning: Safety instructions will be presented in a box such as this. All symbols must be
followed and adhered to. To not do so will or could result in a dangerous situation.

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1.8 Operating Modes
The controller allows user control of the ventilation unit. It is equipped with a temperature sensor for
measuring the local room temperature which is displayed on the screen, A time control system and a USB
interface. The control element has the following operating modes:
•Manual operation
•Automatic operation
•Time programme
•OFF (only if MultiPlexBox function configuration is activated)
The “operating mode” key can be used to select operating mode.

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1.9 Menu Functions
By pressing the “Next” key (arrow pointing right), the user will reach the first menu level. The following menu
options can be selected:
•Edit time programme
•Copy time programme
•Settings
•Service
The menu is selected by pressing the “Confirm” key (tick).
All settings are adjusted according to the same principle:
Change to the next/previous menu level: → / ←
Increase/reduce value or change the setting: + / -
Select setting or confirm change: / Set
One step back:
1.9.1 Operating Modes
Manual operation When manual operation is selected, the control panel for the ventilation level setting is
also displayed. By pressing the “Ventilation stage” key, basic ventilation, ventilation level 1, ventilation level
2, ventilation level 3 and Off can be selected (the Off function is only possible when basic ventilation is
deactivated in the Service menu of the software program). The selected ventilation stage is displayed in text
field 1.
Time programme (weekly time programme) When the time programme option is selected, a clock is also
shown in the “Operating mode” control panel (top right corner). The ventilation stages are set automatically
according to the selected time programme. The active ventilation stage is displayed in the “Ventilation stage”
display.
Automatic operation When automatic operation is selected, the ventilation stages are controlled
automatically depending on the air quality. The measured air quality is shown in the display in the “Sensor”
display. “AUTO” will also display with the current ventilation stage. The sensitivity of the sensor control can
be adjusted in the “Settings” menu.
OFF (only possible when basic ventilation is deactivated) When “Off“ mode is selected, the dampers will be
closed and the air discharge/supply to the service unit will be interrupted.
1.9.2 Display Light
The display light is set using the “Light” control panel (lamp symbol). In this respect, hold the key for 5
seconds. Either “Continuous display” (lamp symbol without arrow) and “Automatic deactivation after 30
seconds” (lamp symbol with arrow) can be selected.
The deactivated display can be reactivated by touching the bottom left corner of the screen.
1.9.3 Time Programme
The weekday can be selected under “Edit time programme”. Select the desired weekday using the arrow
keys. Then select the time segment, set the hours and minutes, and select the desired fan speed. You can
also save other time segments (max. 6 segments per day). In addition, ventilation stage 0 (only if basic
ventilation deactivated), ventilation stage G (basic ventilation) and ventilation stage A (automatic operation)
can also be set in the time programme function.
Example:
Segment 1: 22:00 hrs, ventilation stage 1
Segment 2: 06:00 hrs, ventilation stage 2
Segment 3: 08:00 hrs, ventilation stage 1
The ventilation unit is active from 22:00 to 06:00 on ventilation stage 1, from 06:00 to 08:00 on ventilation
stage 2 and from 08:00 until the next set time segment. If no time is set, the unit will continue basic
ventilation (ventilation stage 1).

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Copy time programme
Select the weekday to be copied as a template. Confirm your selection and then select the target weekday
and confirm this selection again. If necessary, repeat this step for the other weekdays.
1.9.4 Settings
The following options can be selected under the menu item “Settings”:
•Date / Time
•Duration of Ventilation stage 3
•Sensor sensitivity
•Versions (software version)
•Language
Date/Time
Setting for current time and date. The summer/winter time is automatically adjusted.
Duration Ventilation stage 3
The set duration of the ventilation stage can be specified between 5 and 240 minutes in this menu item. If
ventilation stage 3 is selected in “Manual operation” mode, the ventilation unit will switch back to ventilation
stage 2 after the specified period.
Sensor Sensitivity in automatic operation
The detailed settings for sensor sensitivity on automatic operation (low/medium/high).
Parameters
Sensor
Low
Medium
High
Humidity sensor [% r.F.]
50
45
40
60
55
50
70
65
60
Air quality sensor [ppm]
900
600
500
1200
800
700
1500
1000
900
Versions (software version)
The current software version of the controller is shown.
Language
The available menu languages are English and German.
1.9.5 Firmware Update
Download the MultiPlexBox configuration and commissioning software. After installation, start the
programme “MultiPlex update”. Connect the controller to your PC/Laptop using a Mini USB to USB A cable
(not included in delivery).
Click on the ‘Establish connection’ button. The main update tool window will open. Now click on ‘Select file’,
select the controller firmware in the window that opens and then ‘Open’.
Click on ‘Start’, the firmware update will then be performed, and the progress will be displayed in a status
bar. After a successful update, the “update complete“ message will appear in the top right of the display
window. You can then disconnect the controller from the USB cable and close the programme. Your
controller firmware will now be up to date.

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1.9.6 Service
Service menu only for factory customer service team and does not need to be adjusted in any
circumstances.
1.9.7 Errors
In case of an error, an exclamation mark will flash in the display and the corresponding error code will appear
in text field 2.
Error
Group
Error
Number
Description
0
0
No error
2
1
Error communication. Unable to set up communication between
MultiPlexBox and touchscreen controller
2
3
Error communication internal sensor. Unable to communicate with
configured sensor.
3
19
Error differential pressure sensor supply air. Unable to read sensor.
3
20
Error differential pressure sensor extracted air. Unable to read sensor.
4
1
Error memory system. Unable to load parameter data.
2.0 Installation
2.0 Technical Data
Voltage: 12 V
Operating Stages: 3
Control Line: J-Y(St) 2 x 2 x 0.6
Protection Rating: IP20
Dim. (WxHxD) mm: 110 x 93 x 19
Ambient temperature / humidity:0-55°C 95% RH (not condensing)
Weight: 123g
2.1 Installation/removal
−Screw the mounting frame to the flush mounted box.
−Wire connector according to wiring diagram.
−Plug the connector into the device and the controller.
−Slide the controller into the frame, until snap-fit is re-engaged. − Removal: Press the snap-fit towards the
wall and push the device upwards.

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2.2 Wiring Diagram
Please wire the controller following the wiring diagram 1 below. Use the connection location as a reference.
Controller Connection
Location Reference
A. Mains Voltage (230 V AC)
B. Switching contact (potential-free max. 5 A)
C. Modbus A
D. Modbus B
E. Control unit
F. USB (PC connection)
Warning!Danger to life through electric shock. The electrical connection and installation
work must only be carried out by a qualified electrician with the relevant legal authorisation. Do
not attempt anything in this manual if you are unsure of the correct implementation safety
measures.
RS484
RS484
+ 12 V
GND
Diagram 1: Wiring of the touchscreen controller

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Airflow Developments Limited
Aidelle House, Lancaster Road
Cressex Business Park, High Wycombe
Buckinghamshire, HP12 3QP, UK
Email: [e-mail]
Telephone: [phone]
Facsimile: [phone]