Logamatic Ems Control Concept; Types Of Controls; Room Temperature-Dependent Control - Buderus Logamax plus GB162 Technical Manual

4 Heating control
4.2

Logamatic EMS control concept

At the core of the Logamatic EMS control system is the
digital universal burner unit UBA3.5, that not only controls
and monitors the burner but also takes care of the safety
functions of the gas condensing boiler. Several standard
control functions are already taken care of via the
communication path to the Logamatic BC10 base
controller ( page 34 f.).
The EMS-BUS provides a second communication path.
Control components and modules without boiler-specific
functions are connected to this BUS via a 2-core cable
( fig. 18). These components include the RC35 and
RC25 programming units, as well as the function modules
(mixer, low loss header and solar module).
Up to two modules can be integrated into the Logamax
plus GB162 gas condensing boilers. Additional modules
can be mounted on the wall in a separate enclosure.
Activating, adjusting and setting the parameters for the
function modules of the Logamatic EMS control system
will always require an RC35 programming unit
( page 37).
The Logamatic EMS control system enables room
temperature-dependent and weather-compensated
control.
The Logamatic EMS control system is tailored for
standard systems and offers a fixed range of functions
(system examples page 67 to page 84). This range of
functions cannot and must not be exceeded.
32
4.3

Types of controls

4.3.1

Room temperature-dependent control

With room temperature-dependent control, the heating
system or the heating circuit is regulated subject to the
temperature in a reference room. For this method of
control, the RC25 or RC35 programming units are
suitable; these have an integral room temperature sensor.
For this reason, the RC25 and RC35 programming units
are installed in the reference room to provide room
temperature-dependent control (
An external room temperature sensor can also be
connected to the RC35 programming unit if it cannot be
installed in the reference room in a position that would be
both favourable to capturing the room temperature and
still be in a convenient position for the user.
Position of the room temperature sensor
Install the room temperature sensor inside the reference
room in such a way that negative influences are avoided:
• Not on an outside wall
• Not close to windows or doors
• Not near to thermal bridges
• Not in "dead spots"
• Not above radiators
• Not in direct sunlight
• Not in the path of direct heat radiation from electrical
appliances or similar
RC25
RC35
1
≥ 0,6
Fig. 19 Position of the RC25 or RC35 programming
units or the external room temperature sensor in
the reference room (dim. in m)
1 Required clearance below the RC25 or RC35
6 720 645 821 (2010/09) – Logamax plus GB162
fig. 19).
≥ 1
6 720 642 463-19.1il