Theben KNX OT box User manual

KNX OT box
OpenTherm interface for KNX
855 9 200
309 483 01
Designated use
The KNT OT box serves as an interface between the heating
system in the OT bus (simple bus system in heating and ventila-
tion technology) and the KNX system.
It delivers the necessary data for heating control (heating etc.)
and sends it to the heater. The following functions are avail-
able with the KNT OT box:
– needs-driven advance control
– weather-dependent advance control
– control of domestic water heating
– energy maximisation with solar support of domestic
water heating
– minimum heating requirement/screed drying program
– legionell a protection program
ETS (engineering tool) enables application programs to be
selected, specific parameters and addresses to be assigned and
transferred to the device.
The device is designed for installation on DIN top hat rails (in
accordance with EN 60715). Only to be used in closed, dry
rooms.
Installation
Connection
 Clip KNX OT box onto the distributor rail.
KNX bus module
KNX OT box and KNX bus module can be separated mechani-
cally.
 Unlock and remove KNX module  on the KNX OT box 
or replace and lock it.
Description of LEDs
Please note the provisions of EN 50428 for switches or similar
installation material for use in building systems technology
with regard to the correct installation of bus lines and device
start-up procedure.
Tampering with, or making modifications to, the device will
invalidate the guarantee.
Safety advice
 Installation should only be carried out by a professional
electrician.

KNX OT box
 Connection terminals for OT
5 LEDs
KNX bus module
Programming keys and LED
for physical address
Manual push button Test
Bus connection:
Ensure correct polarity!
Slide for locking
KNX bus module
Description
7 8
OT
KNX
NOTE
LED 1
green
Central heating (flashes when
minimum heating require-
ment is active)
OT: CH enable
LED 2
green
Domestic water heating OT: DHW enable
LED 3
green
Burner on/off OT: flame state
LED 4
green
OpenTherm active (flashes
with OT telegram)
LED 5
red
Error (flashes) OT: error
OT

Technical data
• Operating voltage (bus): 30 V
• Current consumption (bus): 10 mA
• Permissible ambient
temperature: –0 °C ... +45 °C
• Protection class: III in accordance with EN 60730-1
• Protection rating: IP 20 in accordance with EN 60529
• Mode of operation: Type 1 in accordance with
EN 60730-1
• Pollution degree: 2 in accordance with EN 60730-1
• Rated impulse with stand voltage: 4 kV
• Bus protocol used: OpenTherm V4.0 with SmartPower
Service address
Theben AG
Hohenbergstr. 32
72401 Haigerloch
GERMANY
Telephone [phone]
Fax [phone]
Hotline
Telephone [phone]
Fax [phone]
[email protected]
Addresses, telephone numbers etc.
www.theben.de
Minimum heating requirement/screed drying
program
Minimum heating requirement is the preparation for laying
floor coverings and serves to dry the screed to enable fast lay-
ing of floor (= minimum heating requirement). This test must
be performed by the floorer.
• The device supports minimum heating requirement in
accordance with DIN EN 1264-4.
• The minimum heating requirement function is set ex works
and is activated on set-up (LED 1 flashes).
• The function can be deactivated via the ETS (Minimum
heating parameter) or reactivated.
• The function can be interrupted up to start-up by
withdrawal of KNX bus module.
Observe deviating technical data on the device rating plate!
Technical changes reserved.
The ETS database is available at www.theben.de
Please refer to the KNX Handbook for detailed functional
descriptions.
Manual operation – push button test
 Press test button until heater
switches on.
This test function checks whether the KNX OT box is
correctly connected to the burner.