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
