ROTEX Heating Systems GmbH
18
5.3
Connect room thermostat
5.3.1
Room thermostat on/off
1.
Connect the room thermostat (see par. 10.2).
2.
If necessary, set the feedback resistance of the room thermostat to 0.1 A. If unsure,
measure the electrical current and set it accordingly.
The maximum resistance of the thermostat pipe and the room thermostat amounts to a
total of 15 Ohm.
5.3.2
Modulating thermostat, Open Therm
The unit is suitable for connecting a modulating room thermostat, in accordance with
the OpenTherm communication protocol.
The most important function of the modulating room thermostat is to calculate the input
temperature at a required room temperature, in order to make optimal use of the
modulating. At every heating request, the required input temperature is shown on the
display of the unit.
Connect the modulating thermostat (see par.10.2).
If you want to use the tap water on/off switch function of the OpenTherm thermostat, the
tap water comfort function must be set to eco or on.
For more information, consult the manual of the room thermostat.
5.3.3
Modulating room thermostat, wireless
The RHOB*AAV1H CH boiler is suitable to communicate wireless without
sending/receiving module with the Honeywell room thermostats T87RF1003 Round RF,
DTS92 and CMS927. The CH boiler and the room thermostat must be appointed to each
other:
•
Press the reset button of the unit for approximately 5 seconds in order to get to the RF-
room thermostat menu.
•
One of the following codes will be shown on the display of the unit:
1. rF and L /
-
: the display above the button shows an L alternated by a
–
red led
: flashing
The CH boiler has not been appointed. A unit in this operating status, can be linked
by using the method of the appropriate room thermostat.
The method of appointment depends on the type of room thermostat and is
described in the installation and operating instructions of the wireless
room thermostat.
2. rF and L / 1 : the display above button shows an L alternated by a 1
red led
: off
The CH boiler has already been appointed. There is already an existing link with
an RF room thermostat. In order to allow a new link to be made, the existing link
will have to be removed.
See: Undo the appointment of an RF room thermostat to the CH boiler.
•
Press the reset button to exit the RF room thermostat menu or wait for 1 minute.
Testing the connection between the unit and the RF room thermostat
1. Press the reset button of the unit for approximately 5 seconds to access
the RF room thermostat menu of the boiler controller.
2.
Press the service button 1x. On the display above the button, a
t
will be shown.
3.
Set the room thermostat to the test mode (see the installation and operating
instructions of the room thermostat).
4.
The red led above the reset button will flash if the appointment has
been carried out correctly.
5.
Press the reset button of the unit to exit the RF room thermostat menu of
the boiler controller. You will automatically exit the test mode 1 minute after
the last test message of the RF room thermostat has been received.
