Theben KNX OT box Manual

KNX OT box
OpenTherm interface for KNX
855 9 200

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.
Safety advice
NOTE
 Installation should only be carried out by a professional
electrician.
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.
Description
KNX OT box
309 483 01
 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 of LEDs
LED 1 Central heating (flashes when
green minimum heating require-
ment is active)
LED 2 Domestic water heating
green
LED 3 Burner on/off
green
LED 4 OpenTherm active (flashes
OT
green
with OT telegram)
LED 5 Error (flashes)
red
Installation
 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.
Connection
7 8
OT
KNX
OT: CH enable
OT: DHW enable
OT: flame state
OT: error