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Operating instructions Control unit
7 747 012 053-00.1RS
Logamatic 4321/4322
7 747 017 022 - 03/2008 GB/IE
For users
Read carefully before use
Contents
Logamatic 4321/4322 - 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.4 Setting the room temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.5 Heating DHW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7 Extended functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.1 Keys for extended functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.2 Controlling the extended functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.3 Displaying operating values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.4 Changing the permanent display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.5 Setting the date and time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.6 Selecting a heating circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.7 Adjusting the room temperature for another heating circuit . . . . . . . . . . . . . . . . 32
7.8 Heating circuits with MEC2 programming unit . . . . . . . . . . . . . . . . . . . . . . . . 34
7.9 Selecting and modifying a heating program . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.10 Selecting a standard program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7.11 Summary of standard programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.12 Modifying the standard program by moving switching points . . . . . . . . . . . . . . . 39
7.13 Setting the summer/winter time adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.14 Setting the DHW operating mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.15 Setting the operating mode for DHW circulation. . . . . . . . . . . . . . . . . . . . . . . 44
7.16 Setting the holiday function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Contents
Logamatic 4321/4322 - Subject to technical modifications. 3
7.17 Interrupting and continuing the holiday function . . . . . . . . . . . . . . . . . . . . . . . 47
7.18 Setting the party function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.19 Setting the pause function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.20 Room temperature matching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7.21 Automatic maintenance message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8 Additional programming options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
8.1 Modifying the standard program by inserting/deleting switching points . . . . . . . . . 51
8.2 Creating a new heating program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
8.3 Creating a new DHW program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
8.4 Creating a new DHW circulation pump program . . . . . . . . . . . . . . . . . . . . . . . 64
9 Modules and their functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
9.1 ZM434 burner and boiler circuit module (standard equipment) . . . . . . . . . . . . . . 66
9.2 FM441 function module (accessory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
9.3 FM442 function module (accessory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
10 Boiler flue gas test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
11.1 Simple troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
11.2 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
12 Operation in the event of a fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
12.1 Emergency mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
13 Setup report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
14 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Introduction
1
Logamatic 4321/4322 - Subject to technical modifications.
4
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 in 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 2
Logamatic 4321/4322 - Subject to technical modifications. 5
2 What you should know about your heating system
Why should you become more familiar with your
heating system?
Modern heating systems offer you 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,
the heating control unit, the pipework and the radiators.
A DHW cylinder or an instantaneous water heater heats
the water required for 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 burns 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
2
Logamatic 4321/4322 - Subject to technical modifications.
6
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
needs 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
1Boiler
2Burner
3Pump
4Flow line
5Thermostatic radiator valves
6Radiators
7Return line
Fig. 2 Influences on the room climate
What you should know about your heating system 2
Logamatic 4321/4322 - Subject to technical modifications. 7
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,
if warm rooms or DHW are required. In doing so,
it utilises the components of your heating system
at the correct time.
Also, your heating system 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)
xOutdoor temperature
yFlow temperature
What you should know about your heating system
2
Logamatic 4321/4322 - Subject to technical modifications.
8
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 temperature.
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 will 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 fully ignoring the other
rooms.
With this kind of control you will also need to keep
all radiator valves in the reference room fully open.
Why do the thermostatic radiator 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 valve, 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 in 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 2
Logamatic 4321/4322 - Subject to technical modifications. 9
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 circuit.
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
3
Logamatic 4321/4322 - Subject to technical modifications.
10
3 Tips on energy-efficient heating
Here are a few tips on how to heat economically, without
sacrificing convenience:
zOnly 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.
zAir rooms correctly during the heating season:
Open windows three to four times a day for
approximately 5 minutes. Having the window slightly
open all the time does not provide fresh air changes
and wastes valuable energy.
zClose the thermostatic valves whilst ventilating.
zWindows 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.
zNever position large objects such as a sofa or desk
immediately in front of radiators (maintain a
clearance of at least 50 cm). Otherwise, the heated
air cannot circulate and heat the room adequately.
zIn 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).
zNever 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.
zAlso heat in an energy-conscious manner in spring
and autumn, and utilise the summer/winter time
adjustment (Æ Chapter 7).
zA pleasant ambience not only depends on the room
temperature, but also on the relative humidity.
The drier a room, the cooler it feels. You can optimise
the relative humidity with house plants.
zYou 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.
zArrange with your local heating contractor to service
your heating system annually.
Safety 4
Logamatic 4321/4322 - Subject to technical modifications. 11
4 Safety
4.1 About these instructions
These operating instructions contain important
information for the safe and correct operation of
the Logamatic 4321 and 4322 control units.
4.2 Correct use
The Logamatic 4321 and 4322 control units are
designed to control and monitor heating systems with
different types of boiler in multi-occupancy dwellings,
residential complexes and buildings with medium to
large heat demand.
4.3 Standards and guidelines/directives
4.4 Symbol key
Two levels of danger are identified and signalled by
the following terms:
4.5 Please observe these notes
zOnly operate the control unit as intended and
if it is in perfect working order.
zLet your local heating contractor instruct you
thoroughly in the operation of this system.
zRead these operating instructions carefully.
zOnly 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.
zMaintenance 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
adjustment of the appliance plus other
useful information.
WARNING!
RISK TO LIFE
from electric shock.
zNever open the control unit.
zIn 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.
zArrange for your local 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.
zEnsure that children never operate the
appliance unsupervised or play with it.
zEnsure that only personnel able to
operate the appliance correctly have
access to it.
Safety
4
Logamatic 4321/4322 - Subject to technical modifications.
12
4.6 Cleaning the control unit
zOnly clean the control unit with a damp cloth.
4.7 Disposal
zDispose of the control unit packaging in an
environmentally responsible manner.
zThe lithium battery in the CM431 module may only
be replaced by your local 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 h).
zIf required (e.g. shift work), your local
heating contractor can alter the start
time.
zDuring 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.
zAs there is a risk of scalding at
temperatures above approximately
60 °C, ask your local 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.
zProtect your heating system against
frost damage by draining it and the
DHW pipework at the lowest possible
point.
Controls and MEC2 programming unit 5
Logamatic 4321/4322 - Subject to technical modifications. 13
5 Controls and MEC2 programming unit
5.1 Control unit – controls
Fig. 4 Logamatic 4321 control unit – controls (delivered condition)
12 3 456
7 747 012 053-05.1RS
1High limit safety cut-out
2Boiler water temperature limiter
3F1, F2 fuses
4Connection for external service equipment and MEC2
5Burner emergency operation switch
6ON/OFF switch
Fig. 5 Fitted modules
1Slot 1: e.g. FM442 – heating circuit 1, heating circuit 2
2Slot 2: e.g. FM442 – heating circuit 3, heating circuit 4
ASlot A: ZM434 – boiler circuit, burner
BSlot B: MEC2 (CM431) – MEC2 programming unit
3Slot 3: e.g. FM441 – heating circuit 5, DHW/DHW circulation pump
4Slot 4: e.g. FM458 – strategy module (for multi-boiler systems)
12 34
AB
Controls and MEC2 programming unit
5
Logamatic 4321/4322 - Subject to technical modifications.
14
5.2 MEC2 programming unit
The MEC2 programming unit is the central element
with which you operate your Logamatic 4321/4322
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 stored after you
release the key.
You can reach certain functions, such as day room
temperature, night room temperature, and possibly
the DHW temperature or the automatic heating mode,
directly via the corresponding keys (Æ Fig. 6, [1] to [3]
and [6]).
Behind a flap (Æ Fig. 6, [7]) other keys are available
for additional settings, e.g. for entering days 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
1Constant setback mode
2Automatic heating mode acc. to a time switch
3Constant heating mode
4Display
5Rotary selector
6Enter DHW temperature/reheating
7Flap 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 5
Logamatic 4321/4322 - Subject to technical modifications. 15
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
1Display
2Rotary selector
3Constant heating mode
4Automatic heating mode acc. to a time switch
5Constant setback mode
6Enter day of the week
7Enter holidays
8Select standard display
9Radio 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
5
Logamatic 4321/4322 - Subject to technical modifications.
16
5.3 Switching on the control unit
zCheck that the control unit ON/OFF switch
(ÆFig. 8, [1]) and the switches on the fitted modules
(ÆFig. 8, [2]) are set to "I" and "AUT".
zSwitch the control unit ON by setting the ON/OFF
switch to "I" (Æ Fig. 8, [1]).
After approximately two minutes all modules fitted to the
control unit are recognised, and the standard display is
shown.
5.4 Switching off the control unit
zSwitch the control unit OFF by setting the ON/OFF
switch to "0" (Æ Fig. 8, [1]).
zWhen there is a risk: Isolate the heating system from
the mains supply with the emergency stop upstream
of the boiler room, or by removing the main fuse.
Fig. 8 ON/OFF switch
1ON/OFF switch
2Manual switch
2
7 747 012 053-20.1RS
1
Standard functions 6
Logamatic 4321/4322 - Subject to technical modifications. 17
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
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.
(Requirement: 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
Standard functions
6
Logamatic 4321/4322 - 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 a 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.
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 the room temperature.
USER INFORMATION
The following MEC2 displays only describe the possible displays:
–of module ZM434 (standard equipment level) and
–of the most frequently used modules FM441 and FM442 (accessories).
Boiler temp.
Outside temp.
21°C
45°C
Actual room
Outside temp.
0°C
19.5°C
USER INFORMATION
The display "Common flow" will only be shown for multi-boiler systems.
Standard functions 6
Logamatic 4321/4322 - Subject to technical modifications. 19
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 (ÆChapter 7.10). However,
you or your heating contractor can modify these settings (ÆChapter 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 (ÆChapter 6.3.2).
You can also use manual mode to heat on cooler days when the system
operates in summer mode.
Tag Zeit Temp
Urlaub Auswahl So/Wi
Anzeige Heizkreis Zurück
AUT
AUT
Standard functions
6
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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 the "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.
AUT
Set room
Automatic day
21°C
Fig. 9 Changeover from day and night mode at fixed times (example)
1Day mode
2Night mode
7 747 012 053-18.1RS
1
2
05:30 22:00
21 °C
17 °C
Standard functions 6
Logamatic 4321/4322 - Subject to technical modifications. 21
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. Now your heating system is now in constant
night mode (setback mode), and operates at a lower room temperature.
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 (ÆChapter 7.13).
Standard functions
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22
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 (ÆChapter 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 6
Logamatic 4321/4322 - Subject to technical modifications. 23
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 the "Night mode" key.
The selected night temperature is now set 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 energy-
conscious 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 ÆFig. 10).
Tag Zeit Temp
Urlaub Auswahl So/Wi
Anzeige Heizkreis Zurück
AUT
Fig. 10 Example: DHW heating
1Day mode
2Night mode
3OFF
7 747 012 053-17.1RS
1
205:30 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 6
Logamatic 4321/4322 - Subject to technical modifications. 25
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 with
the rotary selector.
Release the "DHW" key. The newly selected DHW temperature is saved in
approximately 2 seconds. The permanent display will then appear again.
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 LED of the "DHW" key illuminates, and once-only DHW heating begins.
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, DHW is available almost immediately.
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 activated 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 too can get very hot.
zIn 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).
DHW
Reheating
actual 55°C
Extended functions
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26
7 Extended functions
The extended functions are explained in this chapter. You need the extended
functions to be able to change the factory settings of your heating system.
You can use the following functions:
–Display the current operating values for your heating system
–Set the time
–Set the date
–Set heating circuits
–Select a heating program
–Set the room temperature for additional heating circuits
The keys for the extended functions are located behind the flap of the MEC2
programming unit.
7.1 Keys for extended functions
Fig. 11 Keys for the extended functions
1Enter day of the week
2Enter holidays
3Select standard display
4Set the time
5Change temperature values
6Summer/winter time adjustment
7Return to the standard display
8Select a time switch program
9Select heating circuits/DHW circuit
1
2
3
4
5
6
7
8
9
7 747 012 073-01.1RS
Extended functions 7
Logamatic 4321/4322 - Subject to technical modifications. 27
7.2 Controlling the extended functions
The extended functions provide access to a further control level. At this level,
proceed according to the "Push and turn" principle. The control procedure is
always similar:
zOpen flap.
Hold the required key down, e.g. the "Time" key, and simultaneously turn the
rotary selector.
By turning the rotary selector you modify the values that flash on the display.
Release key. Modified values are saved.
7.3 Displaying operating values
You can display and control the various operating values of the boiler,
the selected heating circuit and the system.
Only the operating values of the selected heating circuit, e.g. heating circuit 1
are displayed (ÆChapter 7.6).
zOpen flap.
Turn the rotary selector clockwise, without pressing any other key.
Subject to the modules, various of the following operating displays can be
called up:
–Burner and Hours run
–Actual room temperature of the heating circuit
–Set heating circuit room temperature
–Heating circuit operating state
–Actual heating circuit flow temperature
–Actual DHW temperature*
–Set DHW temperature*
–DHW operating mode*
–Operating state – DHW circulation pump and cylinder primary pump*
* Only if a DHW module has been installed.
+
"Back" key = Exit menu.
AUT
Heating circ. 0
20°C
Set room
Extended functions
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28
7.4 Changing the permanent display
You can determine the permanent display of the programming unit.
The following permanent displays are available:
–Boiler temp. or Common flow (if MEC2 is wall mounted)
–Outside temp.
–DHW*
–Time
–Date
* Only if a DHW module has been installed.
Hold the "Display" key down, and select the required permanent display with
the rotary selector (here: "Date").
Release the "Display" key. The selected permanent display has now been
saved.
AUT
+
Common flow
Date
20.08.2001
45°C
Extended functions 7
Logamatic 4321/4322 - Subject to technical modifications. 29
7.5 Setting the date and time
The MEC2 contains a radio receiver that, under normal reception conditions,
constantly monitors and corrects the control unit time switch.
When using the MEC2 programming unit, the reception of the radio clock
signal depends on location and position.
Reception of the radio clock signal is indicated by symbol on the display.
Generally, reception is possible within a radius of 1500 kilometers around
Frankfurt/Main [Germany].
In case of reception problems, please observe the following:
–The radio reception is weaker in rooms surrounded by steel-reinforced walls,
in cellars, high-rise buildings etc.
–The distance from sources of interference, such as computer monitors and
TV sets, should be at least 1.5 m.
–The radio reception tends to be better at night than during the day.
You can manually adjust the date and time on the MEC2, if the radio clock signal
is not available in your area.
USER INFORMATION
Date and time are preset at the factory. This function is backed up by battery
power independent of the mains power supply.
USER INFORMATION
We recommend leaving the radio clock receiver disabled outside Germany
to prevent the reception of false signals (incorrect time setting).
AUT
/
USER INFORMATION
Well screened boiler rooms may impede the reception of the radio clock signal.
If you have only an impaired radio clock signal reception or none at all,
the factory setting for automatic summer/winter time adjustment according
to calendar should be retained.
Extended functions
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30
Setting the date
Hold "Weekday" down, and select the required date with the rotary selector
(here: "20").
The name of the day automatically changes (here: "Monday") if you set the date
for the day using the rotary selector (here: "20").
Release "Weekday" to save your input.
Press "Weekday" again to enter the month.
Press "Weekday" again to enter the year.
The item flashing can be modified with the rotary selector.
Setting the time
Hold down "Time", and select the required time with the rotary selector.
The time is set in one-minute steps.
Release "Time" to save your input.
+
Set date
Monday
20.08.2001
+
Set time
15:52:58
Extended functions 7
Logamatic 4321/4322 - Subject to technical modifications. 31
7.6 Selecting a heating circuit
Your heating system may be equipped with several heating circuits. If you want
to change a setting, e.g. the heating program, first select the heating circuit
whose setting you want to change.
Subject to the equipment level of your heating system, the following heating
circuits can be selected:
–MEC2 heating circuits (all heating circuits assigned to the MEC2,
ÆChapter 7.8)
–Heating circuit 1 – 8
–DHW
–DHW circulation
zOpen flap.
Hold down the "Heating circuit" key, and select the required heating circuit with
the rotary selector (here: "Heating circ. 2").
Release the "Heating circuit" key. The displayed heating circuit is now selected.
As soon as the heating circuit has been selected, the display returns to the
permanent display.
AUT
+
Heat. circ. sel.
Heating circ. 2
Extended functions
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32
7.7 Adjusting the room temperature for another heating circuit
Your heating system may be equipped with several heating circuits. If you want
to change the room temperature for a different heating circuit than the one last
selected, first select the required heating circuit.
Subject to the equipment level of your heating system, the following heating
circuits can be selected:
–MEC2 heating circuits (all heating circuits assigned to the MEC2,
ÆChapter 7.8)
–Heating circuit 1 – 8
If several heating circuits are assigned to the MEC2, the temperature for these
heating circuits can only be adjusted for all. Otherwise a fault message "Setting
Not possible. MEC heat. circ. select" will appear. In such cases select "MEC
heat. circ.".
zOpen flap.
Hold down the "Heating circuit" key, and select the required heating circuit with
the rotary selector (here: "Heating circ. 2").
Release the "Heating circuit" key. The displayed heating circuit is now selected.
As soon as the heating circuit has been selected, the display returns to the
permanent display.
AUT
AUT
+
Heat. circ. sel.
Heating circ. 2
Actual room
Outside temp.
0°C
19.5°C
Extended functions 7
Logamatic 4321/4322 - Subject to technical modifications. 33
Press and hold down "Temperature". First, the heating circuit whose
temperature you want to adjust is displayed. After approximately 2 seconds, the
display will show the currently selected temperature and operating mode.
Adjust the temperature with the rotary selector (here: "21°C") for the heating
circuit.
Release the key to save your input.
The day room temperature is now adjusted to 21 °C. The selected permanent
display will then appear again.
+
Set room
Automatic day
21°C
USER INFORMATION
If you want to adjust the temperature for an operating mode that is not
the current mode, first select the corresponding operating mode (e.g. with
the "Night mode" key). After modifying the temperature, reset the operating
mode to the previous setting.
USER INFORMATION
For heating circuits with individual remote control units (e.g. BFU), you can
adjust the room temperature only via this remote control (Æ see instructions for
the relevant remote control unit).
Extended functions
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34
7.8 Heating circuits with MEC2 programming unit
During installation, your heating contractor will determine which heating circuits
are to be controlled by the MEC2 programming unit. These heating circuits will
be designated "MEC heat. circ.".
MEC heat. circ.
The following adjustments made at the MEC2 apply all to "MEC heat. circ."
simultaneously:
–Setting the room temperature
–Setting the summer/winter time adjustment
–Selecting the operating mode
–Setting the holiday function
–Setting the party or pause function
If you have selected an individual heating circuit that is assigned to the MEC2,
and you want to make one of the above adjustments, the fault message "Setting
Not possible MEC heat. circ. select" will appear.
Select "MEC heat. circ." to program these settings (Æ Chapter 7.6).
Individual heating circuits
The following adjustments can only be implemented for each individual heating
circuit separately:
–Selecting the standard program
–Modifying the standard program by moving switching points
–Inserting or deleting switching points
–Deleting or connecting heating phases
–Creating a heating, DHW or DHW circulation pump program
If you have selected "MEC heat. circ.", and you want to make one of the above
adjustments, the fault message "Time switch not possible Single heat circ
select" will appear.
Enter these settings for each heating circuit separately (Æ Chapter 7.6).
Setting
select
MEC heat. circ.
Not possible
Time switch
select
Single heat circ
Not possible
Extended functions 7
Logamatic 4321/4322 - Subject to technical modifications. 35
7.9 Selecting and modifying a heating program
7.9.1 What is a heating program?
A heating program provides automatic changeover between operating modes
(day and night mode) at fixed times. This automatic changeover is effected via
a time switch.
Before you utilise this option, consider the following:
–At what time in the morning should your home be warm? Is this time also
subject to the day of the week?
–Are there days when you don't want to heat?
–From what time in the evenings do you no longer need to heat? This may also
depend on the day of the week.
The length of time your heating system takes to heat up individual rooms may
vary. This will be subject to the outside temperature, the building insulation and
the drop in room temperature.
The "Optimisation" function of the programming unit calculates the various heat-
up times. Ask your heating contractor whether this function has been enabled.
If so, all you need to do is enter the times at which your home should be warm.
With the programming unit, Buderus offers eight different, pre-programmed
heating programs as standard programs.
Fig. 12 Example for a standard program (here: "Family program"
from Monday to Thursday)
1Day mode
2Night mode
7 747 012 053-16.1RS
1
2
05:30 22:00
USER INFORMATION
After commissioning, check whether the selected heating program suits your
lifestyle. If not, several options are available for matching the heating program
to your individual requirements.
Extended functions
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7.9.2 Time switch program for DHW
You may enter your own heating program for DHW heating. This saves you
energy.
Determine the time points so that DHW is only available when one heating circuit
is in standard heating mode (day mode). DHW will then be heated 30 minutes
prior to day mode starting in the first (by time) heating circuit, to ensure it is
available at the required time.
If you require additional hot water, you may, at short notice, heat DHW with
the "DHW heating once" function (ÆChapter 6.5.2).
Fig. 13 DHW heating begins 30 minutes before day mode of the first heating circuit,
and ends with the beginning of night mode of the last heating circuit
AHeating circ. 1
BHeating circ. 2
CDHW
1Day mode
2Night mode
7 747 012 053-19.1RS
1
206:30 23:00
1
206:00
A
B
1
205:30 23:00
C
30 min
22:00
USER INFORMATION
DHW will not be subject to a temperature setback if you operate one heating
circuit in "Constant day" mode, and DHW is being heated "by heat. circs".
USER INFORMATION
DHW will not be heated if you are operating all heating circuits in "Constant
night" mode and DHW is heated "by heat. circs.".
Extended functions 7
Logamatic 4321/4322 - Subject to technical modifications. 37
7.10 Selecting a standard program
The MEC2 programming unit is equipped with eight different, preset heating
programs that act as standard programs. See the following page for a summary
of the preset times of the standard programs.
Please check which standard program best meets your requirements.
First check the number of switching points, and then the times. The "Family"
program is preselected at the factory.
zOpen flap.
zSelect a heating circuit (Æ Chapter 7.6).
Hold down "PROG". Initially the heating circuit is displayed for which you want
to select a standard program. Approximately 2 seconds later the designation of
the currently selected standard program will appear.
Select the required standard program with the rotary selector (here: "Seniors").
Release the "PROG" key. Now the displayed program has been selected.
The display shows the program designation and the first switching point for
the selected heating program (here "Senior program").
Press "Back" to return to the permanent display.
AUT
+
Time switch
Program select.
Seniors
Senior program
Monday
21°C
at 05:30
USER INFORMATION
Switching programs are only effective in automatic mode (Æ Chapter 6.3.1).
Extended functions
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38
7.11 Summary of standard programs
Program designation Weekday ON OFF ON OFF ON OFF
"Family"
(factory setting)
Mo – Th
Fr
Sa
Su
05:30
05:30
06:30
07:00
22:00
23:00
23:30
22:00
"Early Morning"
Early shift
Mo – Th
Fr
Sa
Su
04:30
04:30
06:30
07:00
22:00
23:00
23:30
22:00
"Late Evening"
Late shift
Mo – Fr
Sa
Su
06:30
06:30
07:00
23:00
23:30
23:00
"Morning"
Part-time work in the
morning
Mo – Th
Fr
Sa
Su
05:30
05:30
06:30
07:00
08:30
08:30
23:30
22:00
12:00
12:00
22:00
23:00
"Afternoon"
Part-time work in the
afternoon
Mo – Th
Fr
Sa
Su
06:00
06:00
06:30
07:00
11:30
11:30
23:30
22:00
16:00
15:00
22:00
23:00
"Noon"
Midday at home
Mo – Th
Fr
Sa
Su
06:00
06:00
06:00
07:00
08:00
08:00
23:00
22:00
11:30
11:30
13:00
23:00
17:00 22:00
"Single"
Mo – Th
Fr
Sa
Su
06:00
06:00
07:00
08:00
08:00
08:00
23:30
22:00
16:00
15:00
22:00
23:00
"Seniors" Mo – Su 05:30 22:00
"New"
You can enter your own individual program here:
"Own 1"
If none of the standard programs suit you, you may alter them, have them changed by your heating
contractor, or enter a new heating program (ÆChapter 8.2). This will be saved under "Own" and the
number of the heating circuit.
Tab. 1 Standard programs ("ON" = day mode, "OFF" = night mode)
Extended functions 7
Logamatic 4321/4322 - Subject to technical modifications. 39
7.12 Modifying the standard program by moving switching points
If the switching points, i.e. the times of a standard program at which the system
changes over between day and night mode, only partially suit you, you may
change them, or ask your local heating contractor to change them for you.
The modified standard program is saved under "Own" and the number of
the heating circuit. The heating program memory is available for this.
The following example shows how the switching points of the standard program
"Family" can be changed for the days Monday to Thursday.
zOpen flap.
zSelect a heating circuit (here: "Heating circ. 2", ÆChapter 7.6).
Hold down "PROG" and select the required standard program with the rotary
selector.
Release the "PROG" key.
The first switching point (Monday, 05:30) appears.
AUT
Fig. 14 Changing the switching points 05:30 to 06:30 and from 22:00 to 23:00
(example)
A"Family program"
BNew program "Own program 2"
1Day mode
2Night mode
A
B
7 747 012 053-15.1RS
1
2
1
2
05:30 22:00
05:30 06:30 22:00 23:00
+
Time switch
Program select.
Family
Family program
Monday
21°C
at 05:30
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40
Hold down "Time", and select the required time with the rotary selector.
Example: "06:30".
Release the "Time" key. The newly adjusted time for the "ON" switching point is
now saved.
The modified switching point will be saved under the "Own" program and the
number of the heating circuit (here "2").
Continue to turn the rotary selector, until the next switching point that you want
to change is displayed.
The "OFF" switching point for Monday appears. Now you can modify the time for
the "OFF" switching point.
Hold down "Time", and select the required time with the rotary selector.
Example: "23:00".
Release the "Time" key. The newly adjusted time for the "OFF" switching point
is now saved.
Next switching point
Continue to turn the rotary selector until the next switching point is displayed.
The next switching point (Tuesday, 05:30) appears.
Also change the following switching points to 06:30 and 23:00. The system will
now heat from 06:30 to 23:00 Monday to Thursday.
Press "Back" to return to the permanent display.
The modified standard program is saved under "Own" and the number of
the heating circuit.
+
Own program 2
Monday
21°C
at 06:30
+
USER INFORMATION
You can change the weekday if you press "Weekday" instead of "Time".
You can change the switching state ("ON"/"OFF") by pressing "Display"
instead of "Weekday" or "Time". The operating mode determines the switching
state: "ON" = day mode; "OFF" = night mode.
zEnsure that a stop point is associated with every start point.
Extended functions 7
Logamatic 4321/4322 - Subject to technical modifications. 41
7.13 Setting the summer/winter time adjustment
In addition to the outside temperature, your control unit considers the ability
of the building to store heat and its thermal insulation (creating from these
the "Adjusted outside temperature", Æ Fig. 15). After a delay, it automatically
changes over between summer and winter mode.
Summer mode
Heating is switched off if the "Adjusted outdoor temperature" exceeds the
factory-set changeover threshold of 17°C.
Summer mode is indicated on the display by symbol .
DHW heating remains operational.
Press "Day mode" if you want to heat at short notice in summer mode.
The heating system returns to automatic summer mode if you press "AUT".
AUT
AUT
Fig. 15 Actual and adjusted outside temperatures compared
1Current outside temperature
2Adjusted outside temperature
xTime
yTemperature
AUT
Produktspecifikationer
| Varumärke: | Buderus |
| Kategori: | Panna |
| Modell: | Logamatic 4322 Boiler |
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