Weather-Compensated Control; Weather-Compensated Control With Room Temperature Hook-Up; External Room Temperature Sensor - Buderus Logamax plus GB162 Technical Manual

4.3.2

Weather-compensated control

With weather-compensated control, the heating system is
regulated subject to the outside temperature.
This method of control requires an RC35 programming
unit. The RC35 programming unit can be installed in the
gas condensing boiler and is supplied, if required, with
the necessary outside temperature sensor.
Position of the outside temperature sensor
Install the outside temperature sensor so that it captures
the outside temperature without extraneous influences
( fig. 20). Therefore always install it on the north side of
the building.
For optimum temperature capture, avoid the following
temperature sensor positions:
• Never above windows, doors or vents
• Never underneath awnings, balconies or below the
roof
1
Fig. 20 Arrangement of the outside temperature sensor
(dim. in mm)
1 Incorrect arrangement
2 Correct arrangement
4.3.3 Weather-compensated control with room
temperature hook-up
The weather-compensated control with room temperature
hook-up combines the benefits of both previously
mentioned kinds of control.
This method of control requires the installation of the
RC35 programming unit or that of an external room
temperature sensor or an additional RC25 programming
unit inside reference room (
6 720 645 821 (2010/09) – Logamax plus GB162
2
≥ 2,5
7 747 009 801-16.1il
fig. 19).
4.3.4

External room temperature sensor

If the installation of the programming unit in the most
favourable location from a control point of view is
undesirable for visual reasons, or if the installation there
would be inconvenient for users, an external room
temperature sensor can be provided instead for external
installation (only with the RC35 programming unit).
The integral room temperature sensor will be disabled if a
separate room temperature sensor is connected to the
RC35 programming unit.
The external room temperature sensor must be mounted
in a room that represents typical domestic heating habits.
It must not be exposed to a direct source of heat or cold.
The lead of the external room temperature sensor must
not exceed 50 m. As a lead for the temperature sensor, a
YR 2 × 0.8 mm diameter lead can be used.
1)
Fig. 21 Installation of an external room temperature
sensor
1)
Remove jumper and connect the external room sensor
Fig. 22 Separate room temperature sensor for external
installation as an alternative to the integral room
temperature sensor of the RC35 programming
unit (dim. in mm)
Heating control 4
6 720 642 463-20.1il
6 720 642 463-21.1il
33