Buderus Logamatic 4211 Operating Instructions Manual
Operating instructions
Control unit
Logamatic 4211
7 747 016 927 - 03/2008 GB/IE
For users
Read carefully before use
Contents
Logamatic 4211 - Subject to technical modifications.
2
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 What you should know about your heating system. . . . . . . . . . . . . . . . . . 5
3 Tips on energy-efficient heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 About these instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Correct use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Standards and guidelines/directives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.4 Symbol key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.5 Please observe these notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.6 Cleaning the control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.7 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 Controls and MEC2 programming unit . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1 Control unit controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2 MEC2 programming unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.3 Switching on the control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.4 Switching off the control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6 Standard functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1 Simple operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.2 Permanent display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.3 Selecting the operating mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.4 Setting the room temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.5 Heating DHW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7 Extended functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1 Keys for extended functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.2 Controlling the extended functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3 Displaying operating values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.4 Changing the permanent display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.5 Setting the date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.6 Selecting a heating circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.7 Adjusting the room temperature for another heating circuit. . . . . . . . . . . . . . . . . 31
7.8 Heating circuits with MEC2 programming unit. . . . . . . . . . . . . . . . . . . . . . . . . 33
7.9 Selecting and modifying a heating program . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.10 Selecting a standard program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.11 Summary of standard programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7.12 Modifying the standard program by moving switching points . . . . . . . . . . . . . . . 38
7.13 Setting the summer/winter time adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 40
7.14 Setting the DHW operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.15 Setting the operating mode for DHW circulation . . . . . . . . . . . . . . . . . . . . . . . 43
7.16 Setting the holiday function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Contents
Logamatic 4211 - Subject to technical modifications.
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7.17 Interrupting and continuing the holiday function . . . . . . . . . . . . . . . . . . . . . . . . 46
7.18 Setting the party function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.19 Setting the pause function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.20 Room temperature matching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.21 Automatic maintenance message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8 Additional programming options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.1 Modifying the standard program by inserting/deleting switching points . . . . . . . . . . 50
8.2 Creating a new heating program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.3 Creating a new DHW program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.4 Creating a new DHW circulation pump program . . . . . . . . . . . . . . . . . . . . . . . . 63
9 Modules and their functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
9.1 ZM422 central module (standard equipment level) . . . . . . . . . . . . . . . . . . . . . . 65
9.2 FM442 function module (accessory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
10 Boiler flue gas test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
11.1 Simple troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
11.2 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
12 Operation in the event of a fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
12.1 Emergency mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
12.2 Heating with manual override . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
13 Setup report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
14 Keyword index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Introduction
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Logamatic 4211 - Subject to technical modifications.
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1 Introduction
With your purchase of this Logamatic control unit you
have acquired a product that promises you easy control
over your heating system. It offers you optimum heating
convenience and minimum energy consumption.
The control unit enables you to operate your heating
system to be able to combine your economical and
ecological aspirations. Of course, your personal comfort
is always priority.
The control unit, which is regulated by the MEC2
programming unit, is set up at the factory for immediate
use. Naturally, you or your heating contractor can modify
these default settings and adapt them to your individual
requirements.
The MEC2 programming unit is the central control unit.
Some functions which you may need are located behind
a flap. The keys behind this flap enable you to make
various adjustments.
The control concept is:
"Push and turn"
"This control unit speaks your language."
Your heating system offers a wealth of other useful
functions. Some examples of these are:
– Automatic summer/winter time adjustment
– Party/pause function
– Holiday function
– DHW heating at the touch of a button
What you should know about your heating system
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2 What you should know about your heating system
Why should you become more familiar with your
heating system?
Modern heating systems offer many functions for saving
energy without sacrificing comfort. Getting to know this
heating technology may appear daunting at first, but
after a short while you will recognise the advantages you
can gain from a heating system that is set up to meet
your personal requirements. The more you are aware of
the options offered by your heating system, the greater
the benefit you will be able to draw from it.
How does your heating system work?
Your heating system comprises the boiler with burner,
heating control unit, pipework and radiators. A DHW
cylinder or an instantaneous water heater heats the
water required for a shower, bath or washing your
hands. Subject to the way your heating system has been
installed, it can operate either purely as a central heating
system or together with a DHW cylinder. The important
thing is that the various components match each other.
The burner combusts fuel (e.g. gas or oil) and heats the
water inside the boiler. Using pumps, this hot water is
transported through the pipework to the consumers
(radiators, underfloor heating system, etc).
What you should know about your heating system
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Fig. 1 shows the heating circuit of a pumped central
heating system: The burner [2] heats the water inside
the boiler [1]. This heating water is transported by the
pump [3] through the flow line [4] to the radiators [6]. The
heating water flows through the radiators, and in doing
so, gives off some of its heat. The heating water flows
back to the boiler via the return line [7], where the cycle
starts again.
The room temperature can be adjusted to your personal
requirements using the thermostatic radiator valves [5].
All radiators are supplied with the same flow
temperature. The heat transferred to the room depends
on the radiator surface and the heating water
throughput. Therefore, the heat transfer can be
manipulated via the thermostatic radiator valves.
What determines the heat demand of a room?
The heat demand of a room largely depends on the
following factors:
– Outside temperature
– Required room temperature
– Type of construction/insulation of the building
– Wind chill factor
– Solar radiant energy
– Internal heat sources (open fireplace, occupants,
lamps, etc.)
– Closed or open windows
Take these factors into consideration to achieve
a comfortable room temperature.
Fig. 1 Pumped central heating design
1 Boiler
2 Burner
3 Pump
4 Flow line
5 Thermostatic radiator valves
6 Radiators
7 Return line
Fig. 2 Influences on the room climate
What you should know about your heating system
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Why do you need a heating control unit?
The heating control unit ensures convenient heat and
economical consumption of fuel and electrical energy.
It starts the heat source (boiler and burner) and pumps
when warm rooms or DHW are required. In doing so, it
utilises the components of your heating system at the
correct time.
Furthermore, your heating control unit records different
variables that influence the room temperature and
compensates for these.
What does the control unit calculate?
Advanced control units calculate the temperature
required within the boiler (the so-called flow
temperature) subject to the outside temperature. The
relationship between the outside temperature and the
flow temperature is described as the heating curve.
The lower the outside temperature, the higher the flow
temperature must be.
The control unit can operate in three control modes:
– Weather-compensated control
– Room temperature-dependent control
– Weather-compensated control with room
temperature hook-up
Fig. 3 Heating circuit curve (example)
x Outside temperature
y Flow temperature
What you should know about your heating system
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Weather-compensated control
With weather-compensated control, only the outside
temperature captured by the outside temperature
sensor is decisive for the flow temperature level. Room
temperature fluctuations through solar radiant energy,
occupants, open fireplaces or similar external heat
sources are then ignored.
If you utilise this type of control, adjust the thermostatic
radiator valves so that the required room temperature is
achieved in the different rooms.
Room temperature-dependent control
Another possible heating control method is room
temperature-dependent control. The control unit
calculates the flow temperature based on the set and
actual room temperatures.
To be able to utilise room temperature-dependent
control, you need a room that is representative of your
whole home. All factors influencing the temperature in
this "reference room" – where the programming unit is
located – will also apply to all other rooms. Not every
home has a room that meets these requirements. Pure
room temperature-dependent control has, in such
cases, certain limitations.
Should you, for example, open a window in the room
where the room temperature is measured, the control
unit will "think" that you have opened the windows in
every room in your house and will begin to heat
vigorously.
Or the reverse might apply: You measure the
temperature in a south-facing room with different heat
sources (solar or other heat sources, e.g. an open
fireplace). Now the control unit "thinks" that it is as hot in
every room as in the reference room; consequently the
boiler output will be severely reduced so that, for
example, the north-facing rooms will become too cold.
With this kind of control you always need to keep all
thermostatic radiator valves in the reference room fully
open.
Weather-compensated control with room
temperature hook-up
Weather-compensated control with room temperature
hook-up combines the advantages of the other two
control modes. The required flow temperature, which is
mainly subject to the outside temperature, can be
adjusted by the room temperature only to a limited
degree. This achieves improved maintenance of the
room temperature within the room containing the
programming unit, without completely ignoring the
other rooms.
With this kind of control you will also need to keep all
thermostatic radiator valves in the reference room fully
open.
Why do the thermostatic valves have to stay fully
open?
If, for example, you want to reduce the room
temperature in the reference room, and you therefore
close the thermostatic valve further, the flow rate
through the radiator is reduced and, therefore, less heat
is transferred to the room. This reduces the room
temperature. The control unit will endeavour to
counteract the drop in room temperature by raising the
flow temperature. However, raising the flow
temperature does not raise the room temperature, as
the thermostatic valve continues to limit the room
temperature.
An excessive flow temperature results in unnecessary
heat losses from the boiler and pipework. At the same
time, the temperature in all rooms without thermostatic
valves increases due to the higher boiler water
temperature.
What you should know about your heating system
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Why do I need a time switch?
Advanced heating systems are equipped with a time
switch to save energy. With a time switch you can set up
an automatic changeover between two different room
temperatures, subject to time. This enables you to set a
reduced room temperature at night, or other times when
a reduced temperature is sufficient, whilst operating
your heating system with the standard room
temperature during the day.
You have four options for reducing the room
temperature via the control unit. Upon request, your
heating contractor will select and set up one of these
options:
– Total shutdown (no room temperature regulation)
– Reduced room temperature (a reduced room
temperature will be regulated)
– Change between total shutdown and reduced
heating subject to room temperature
– Change between total shutdown and reduced
heating subject to outside temperature
With total shutdown of the heating system, no pumps
or other system components are controlled. Heating
only recommences if the heating system is subject to
a risk of frost.
Heating with reduced room temperature (night mode)
only differs from standard heating mode (day mode)
through a lower flow temperature.
When changing from total shutdown to reduced
heating, total shutdown is activated subject to room
temperature when the actual room temperature
exceeds the set room temperature. This function is only
possible if a room temperature is being monitored.
When changing from total shutdown to reduced
heating, total shutdown is activated subject to outside
temperature when the actual outside temperature
exceeds the set outside temperature.
What are heating circuits?
A heating circuit describes the circuit taken by the
heating water from the boiler via the radiators and back
again (Æ Fig. 1, page 6). A simple heating circuit
comprises a heat source, a flow line, a radiator and
a return line. A pump installed in the flow line circulates
the heating water.
Several heating circuits may be connected to one
boiler, for example, one heating circuit for supplying
radiators and a further circuit for supplying an
underfloor heating system. In this case, the radiators
are supplied at a higher flow temperature than the
underfloor heating system.
The supply of different flow temperatures to different
heating circuits can be achieved by e.g. installing a
three-way valve between the boiler and the underfloor
heating system.
Using an additional temperature sensor in the flow of
the heating circuit to be supplied, sufficient cold return
water is mixed via a three-way valve into the hot flow
water, to achieve the required lower temperature. It is
important to note that heating circuits with three-way
valves require an additional pump. This pump enables
the second heating circuit to be operated independently
of the first heating circuit.
Tips on energy-efficient heating
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3 Tips on energy-efficient heating
Here are a few tips on how to heat economically, without
sacrificing convenience:
z Only heat if you need warmth. Utilise the preset
heating programs (standard programs) in the control
unit, or those that have been tailored to your
individual requirements.
z Air rooms correctly during the heating season: Open
windows fully three to four times a day for
approximately 5 minutes. Having the window slightly
open all the time does not provide an air change and
wastes valuable energy.
z Close the thermostatic valves whilst ventilating.
z Windows and doors are places where a lot of heat is
lost. Therefore, check whether the doors and
windows are correctly sealed. Shut your roller
shutters (if installed) at night.
z Never position large objects such as a sofa or a desk
immediately in front of the radiators, (minimum
clearance 50 cm). Otherwise, the heated air cannot
circulate and heat the room adequately.
z In rooms you occupy during the day, you can, for
example, set a room temperature of 21°C, whilst
17 °C may be sufficient at night. To achieve this, use
standard heating mode (day mode) and setback
mode (night mode) (Æ Chapter 6).
z Never overheat rooms; overheated rooms are
unhealthy, plus they waste money and energy. If you
reduce the day room temperature, for example from
21 °C to 20 °C, you can save approximately six
percent of your heating bill.
z Also heat in an energy-conscious manner in spring
and autumn, and utilise the summer/winter time
adjustment (Æ Chapter 7).
z A pleasant room climate not only depends on the
room temperature, but also on the relative humidity.
The drier the air, the cooler a room feels. You can
optimise the relative humidity with house plants.
z You can also save money when heating DHW: Only
operate the DHW circulation pump via a time switch.
Research has shown that it is generally sufficient to
run the DHW circulation pump for only three minutes
every half hour.
z Arrange for your heating contractor to service your
heating system annually.
Safety
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4 Safety
4.1 About these instructions
These operating instructions contain important
information regarding the safe and correct operation of
the Logamatic 4211 control unit.
4.2 Correct use
The Logamatic 4211 control unit is designed to control
heating systems in detached houses, apartment
buildings, residential complexes and other buildings.
4.3 Standards and guidelines/directives
4.4 Symbol key
Two levels of danger are identified and signified by the
following terms:
4.5 Please observe these notes
z Only operate the control unit as intended and if it is in
perfect working order.
z Let your heating contractor instruct you thoroughly in
the operation of this system.
z Read these operating instructions carefully.
z Only enter or change the operating values detailed in
these instructions. Other entries alter the control
programs of the heating system and can lead to
incorrect system functions.
z Maintenance and repairs as well as troubleshooting
should only be carried out by authorised and
qualified personnel.
The design and operation of this product
conform to European Directives and the
supplementary national requirements.
Its conformity is demonstrated by the CE
designation.
You can view the Declaration of Conformity
on the internet at www.buderus.de/konfo or
request a copy from your local Buderus
sales office.
WARNING!
RISK TO LIFE
Identifies possible risks associated with a
product that might lead to serious injury or
death if appropriate care is not taken.
CAUTION!
RISK OF INJURY/
SYSTEM DAMAGE
Indicates a potentially dangerous situation
which could lead to minor or moderately
serious injuries or to damage to property.
USER INFORMATION
User tips for the optimum utilisation and
setting of the appliance plus useful
information.
WARNING!
RISK TO LIFE
from electric shock.
z Never open the control unit.
z In an emergency, switch off the control
unit (e.g. with the heating system
emergency stop switch) or isolate the
heating system from the mains supply
by removing the main fuse.
z Arrange for your heating contractor to
rectify any heating system faults
immediately.
CAUTION!
RISK OF INJURY/
SYSTEM DAMAGE
from operator error.
Operator errors can result in injury and/or
damage to property.
z Ensure that children never operate the
appliance unsupervised or play with it.
z Ensure that only personnel able to
operate the appliance correctly have
access to it.
Safety
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4.6 Cleaning the control unit
z Only clean the control unit with a damp cloth.
4.7 Disposal
z Dispose of the control unit packaging in an
environmentally responsible manner.
z The lithium battery in the CM431 module may only be
replaced by your heating contractor.
WARNING!
RISK OF SCALDING
For thermal disinfection, the entire DHW
system is set at the factory to heat up to
70 °C (start: Tuesday night at 01:00).
z If required (e.g. shift work), your
heating contractor can alter the start
time.
z During this time, never open any hot
water tap without mixing in cold water if
the DHW circuit of your heating system
is not equipped with a thermostatic
mixer.
z As there is a risk of scalding at
temperatures above approximately
60 °C, ask your heating contractor
about the set DHW temperatures.
CAUTION!
SYSTEM DAMAGE
from frost.
When the heating system is switched off,
it can suffer damage from frost.
z Protect your heating system against
frost damage by draining it and the
DHW pipework at the lowest possible
point.
Controls and MEC2 programming unit
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5 Controls and MEC2 programming unit
5.1 Control unit controls
Fig. 4 Logamatic 4211 control unit - controls (delivered condition)
1 High limit safety cut-out
2 Boiler water thermostat
3 Fuse F1
4 Connection for external service equipment and MEC2
5 Burner emergency operation switch
6 ON/OFF switch
Fig. 5 Fitted modules
1 Slot 1: e.g. FM442 – heating circuit 1, heating circuit 2
A Slot A: ZM422 – heating circuit 0 / boiler / DHW
B Slot B: MEC2 (CM431) – MEC2 programming unit
2 Slot 2: e.g. FM442 – heating circuit 3, heating circuit 4
Controls and MEC2 programming unit
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Logamatic 4211 - Subject to technical modifications.
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5.2 MEC2 programming unit
The MEC2 programming unit is the central element with
which you operate your Logamatic 4211 control unit.
Display
The display (Æ Fig. 6, [4]) indicates functions and
operating values, e.g. the actual room temperature.
Rotary selector
The rotary selector (Æ Fig. 6, [5]) is used to set new
values and scroll through the menus.
Keys
You control the functions via the keys, and the relevant
indications appear on the display. If you push a key and
hold it down, you can change a value using the rotary
selector.
The new value will be accepted and saved after you
release the key.
You can reach certain functions, such as day room
temperature, night room temperature, and possibly the
DHW temperature or automatic heating mode, directly
via the corresponding keys (Æ Fig. 6, [1] to [3] and [6]).
Behind a flap (Æ Fig. 6, [7]), further keys are available
for additional settings, e.g. for the entry of weekdays or
setting the time.
The unit automatically returns to the standard display if
no entry is detected for some time.
Fig. 6 MEC2 programming unit
1 Constant setback mode
2 Automatic heating mode in acc. with a time switch
3 Constant heating mode
4 Display
5 Rotary selector
6 Enter DHW temperature/reheating
7 Flap for the keypad of control level 2
Tag Zeit Temp
Urlaub Auswahl So/Wi
Anzeige Heizkreis Zurück
AUT
1
2
3
6
4
5
7
Controls and MEC2 programming unit
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MEC2 programming unit
Fig. 7 MEC2 programming unit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
7 747 012 074-01.1RS
1 Display
2 Rotary selector
3 Constant heating mode
4 Automatic heating mode in acc. with a time switch
5 Constant setback mode
6 Enter the day of the week
7 Enter holidays
8 Select standard display
9 Radio clock signal (only within Germany)
10 Display for set room temperature
11 Enter DHW temperature/reheating
12 Set the time
13 Change temperature values
14 Summer/winter time adjustment
15 Back to the standard display
16 Select a time switch program
17 Select heating circuits/DHW circuit
Controls and MEC2 programming unit
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5.3 Switching on the control unit
z Check that the control unit ON/OFF switch
(Æ Fig. 8, [1]) and the switches on the fitted modules
(Æ Fig. 8, [2]) are set to "I" and "AUT".
z Switch the control unit ON by setting the ON/OFF
switch to "I" (Æ Fig. 8, [1]).
After approximately 2 minutes all modules fitted to the
control unit are recognised, and the standard display is
shown.
5.4 Switching off the control unit
z Switch the control unit OFF by setting the ON/OFF
switch to "0" (Æ Fig. 8, [1]).
z When there is a risk: Isolate the heating system from
the mains supply with the emergency stop switch
upstream of the boiler room, or by removing the main
fuse.
Fig. 8 ON/OFF switch
1 ON/OFF switch
2 Switch on the module
Standard functions
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6 Standard functions
In this chapter you will find information about the standard functions of the MEC2
programming unit and their use. The standard functions are:
– Selecting the operating mode
– Setting the room temperature
– Setting the DHW temperature
– Heating DHW once
6.1 Simple operation
The standard functions are controlled by pressing one of the keys on the
"Standard function" keypad or by turning the rotary selector.
Example: Adjusting the room temperature for day mode
Press "Day mode" to select the standard heating mode (day mode). The LED of
the "Day mode" key illuminates; day mode is enabled.
Set the required room temperature by turning the rotary selector. (Condition: For
this, the programming unit flap must be closed.)
The display shows the set value.
Tag Zeit Temp
Urlaub Auswahl So/Wi
Anzeige Heizkreis Zurück
AUT
AUT
Set room
Constant day
21°C
USER INFORMATION
If your heating system is equipped with several heating circuits, first select the
correct heating circuit (Æ Chapter 7.6). Only then can you select the operating
mode and room temperature.
USER INFORMATION
The following MEC2 displays only describe the possible displays:
– of the ZM422 module (standard equipment level)
– of the most frequently used FM442 module (accessory)
Standard functions
6
Logamatic 4211 - Subject to technical modifications.
18
Subject to the way your heating contractor has configured your system, one or
more MEC2 displays may not appear, although the above modules are fitted in
your control unit.
Detailed descriptions of MEC2 displays for other modules are included in the
corresponding module documentation.
6.2 Permanent display
There are two different permanent displays. Either one of the factory-set
permanent displays is shown, subject to whether the MEC2 is fitted in the control
unit or is installed as a wall mounted unit.
Factory-set permanent display, if the MEC2 is fitted in the control unit.
Factory-set permanent display, if the MEC2 is installed as a wall mounted unit.
6.3 Selecting the operating mode
You can operate the MEC2 programming unit in two ways:
– In automatic mode
– In manual mode
Automatic mode
Generally, homes are heated less at night than during the day. With the MEC2
programming unit you don't need to adjust the thermostatic radiator valves
before bedtime or in the morning. The automatic changeover of the MEC2
programming unit does this for you. It changes over between day mode
(standard mode) and night mode (setback mode).
The times at which your heating system changes from day to night mode – and
vice-versa – are factory-set via standard programs (Æ Chapter 7.10). However,
you or your heating contractor can modify these settings (Æ Chapter 7.12).
Manual mode
For example, if you want to heat longer in the evening or not quite as early in the
morning, you can also select day and night mode manually (Æ Chapter 6.3.2).
You can also use manual mode to heat on cooler days when the system
operates in summer mode.
Common flow
Outside temp.
21°C
45°C
Actual room
Outside temp.
0°C
19.5°C
Tag Zeit Temp
Urlaub Auswahl So/Wi
Anzeige Heizkreis Zurück
AUT
AUT
Standard functions
6
Logamatic 4211 - Subject to technical modifications.
19
6.3.1 Selecting automatic mode
In automatic mode your heating system will operate with the time switch
program, i.e. central and DHW heating at preset times.
Example: Enabling automatic mode
Press "AUT".
The "AUT" LED illuminates; automatic mode is enabled.
In addition, either the "Day mode" or "Night mode" LED will illuminate. This is
subject to the set times for day and night mode.
Automatic day and night mode
At fixed times, central heating is provided or the room temperature is set back.
6.3.2 Selecting manual mode
Press either "Day mode" or "Night mode" to change to manual mode.
Press "Day mode".
The "Day mode" LED illuminates. Now your heating system is in constant day
mode (standard mode).
Press "Night mode".
The "Night mode" LED illuminates. Your heating system is now in constant night
mode (setback mode), and operates at a lower room temperature.
AUT
Set room
Automatic day
21°C
Fig. 9 Changeover from day and night mode at fixed times (example)
1 Day mode
2 Night mode
7 747 012 053-18.1RS
1
2
05:30
22:00
21 °C
17 °C
Set room
Constant day
21°C
Set room
Constant night
17°C
USER INFORMATION
If you have selected manual mode, other automatic controls will also be
switched off, e.g. the summer/winter time adjustment (Æ Chapter 7.13).
Standard functions
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20
6.4 Setting the room temperature
With the flap closed you can adjust the room temperature with the rotary
selector. With the flap open, also press "Day mode" or "Night mode".
With the rotary selector, you can select the room temperature in degree steps
between 11 °C (day), or 2°C (night), and 30 °C. The set temperature is displayed
via an LED next to the rotary selector. For temperatures below 15 °C or above
25 °C, the "–" or "+" LED illuminates.
The factory setting for the day room temperature is 21 °C.
The factory setting for the night room temperature is 17 °C.
Any adjustment applies to all heating circuits assigned to the MEC2
programming unit (Æ Chapter 7.7).
6.4.1 For the current operating mode
You are currently in automatic "Day mode" and would like to alter the room
temperature.
(Condition: For this, the programming unit flap must be closed.)
Turn the rotary selector to the required day room temperature (here: "23°C").
The day room temperature is now adjusted to 23 °C. The selected permanent
display will then appear again.
Tag Zeit Temp
Urlaub Auswahl So/Wi
Anzeige Heizkreis Zurück
AUT
AUT
USER INFORMATION
The set room temperature applies to the currently enabled heating mode,
i.e. day or night mode. You can recognise the currently enabled heating mode
because the green LED illuminates.
Set room
Automatic day
23°C
Standard functions
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21
6.4.2 For the operating mode not currently enabled
You may also adjust the room temperature for an operating mode that is not
currently enabled.
For example, you are currently in automatic "Day mode" and would like to alter
the set night temperature.
Hold down "Night mode", and select the required night room temperature with
the rotary selector (here: "16°C").
Release "Night mode" key.
The night setback temperature is now adjusted to 16°C. The selected
permanent display will then appear again.
Press "AUT".
The "AUT" LED illuminates; automatic mode is re-enabled.
+
Set room
Constant night
16°C
AUT
USER INFORMATION
If you are currently in automatic "Night mode", and you wish to adjust the day
mode, proceed as described above, but instead hold down the "Day mode"
key.
Standard functions
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6.5 Heating DHW
The programming unit also offers you the option of heating DHW in an energyconscious manner. For this purpose, DHW heating can be selected via a time
switch. You can select between the set values for DHW and "OFF", to stop DHW
heating.
To save energy, DHW heating will be stopped outside the programmed times,
i.e. DHW is not heated in night mode.
DHW heating is factory-set to 60 °C in automatic mode.
We recommend heating the DHW cylinder once in the morning, before central
heating begins, and reheating once in the evening if necessary (see Æ Fig. 10).
Tag Zeit Temp
Urlaub Auswahl So/Wi
Anzeige Heizkreis Zurück
AUT
Fig. 10 Example: DHW heating
1 Day mode
2 Night mode
3 OFF
7 747 012 053-17.1RS
1
2
05:30
21:00
09:00
18:00
60 °C
3
USER INFORMATION
The DHW temperature will have fallen below the set value if the green "DHW"
LED illuminates.
Standard functions
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23
6.5.1 Setting the DHW temperature
You can change the DHW temperature as follows:
Hold down the "DHW" key, and select the required DHW temperature within the
rotary selector.
Release "DHW" key. The newly selected DHW temperature is saved in
approximately 2 seconds. The permanent display will then appear again.
WARNING!
RISK OF SCALDING
from hot water.
The DHW cylinder temperature is preset to 60 °C. There is a risk of scalding
from hot water if your heating contractor has set the DHW temperature higher,
or has enabled the "Therm. disinfect" function, and the heating water circuit of
your heating system is not equipped with a thermostatically controlled mixer.
Please note that fittings can also get very hot.
z In such cases, only ever draw off mixed water (hot and cold).
+
DHW
60°C
set
USER INFORMATION
For thermal disinfection, the DHW will be heated to at least 60 °C once or twice
per week to kill off possible bacteria (e.g. legionella).
Standard functions
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Logamatic 4211 - Subject to technical modifications.
24
6.5.2 Heating DHW once
If the "DHW" LED illuminates, only a limited amount of hot water remains in the
cylinder. Should you require a larger amount of DHW, proceed as follows:
Press "DHW".
The "DHW" LED flashes, and heating DHW once commences.
Subject to the size of the DHW cylinder and the boiler output, DHW will be
available after approximately 10 to 30 minutes. With instantaneous water
heaters or combination boilers, DHW is available almost immediately.
DHW
Reheating
actual 55°C
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