Buderus Logamatic 4322 Operating Instructions Manual

Operating Instructions

Control panel

Logamatic 4321/4322

For the user

Please read carefully before use

Contents

1 Introduction

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2 What you should know about your heating system

. . . . . . . . . . . . . . . . . . 5

3 Tips on energy-efficient heating

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4 Safety

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.1

About this manual

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.2

Designated use

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.3

Standards, regulations and directives

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.4

Key to symbols

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.5

Please observe these notes

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.6

Cleaning control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.7

Disposal

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5 Controls and MEC2 remote control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1

Controls on the basic unit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.2

MEC2 remote control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.3

Switching on the control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.4

Switching off the control panel

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6 Basic functions

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.1

Simple operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.2

Permanent display

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.3

Select operating mode

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.4

Set the room temperature

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.5

Heating domestic hot water

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

7 Extended functions

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.1

Buttons 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 zone

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.7

Adjusting the room temperature for another heating zone

. . . . . . . . . . . . . . . . 31

7.8

Heating zones with MEC2 remote control

. . . . . . . . . . . . . . . . . . . . . . . . . . 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 set points

. . . . . . . . . . . . . . . . . . . 38

7.13 Setting the warm weather shut down (WWSD) temperature

. . . . . . . . . . . . . . . 40

7.14 Setting the DHW operating mode

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

7.15 Setting the operating mode for DHW recirculation

. . . . . . . . . . . . . . . . . . . . . 43

7.16 Set the vacation function

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

2 Logamatic 4321/4322 - Technical specifications are subject to change without prior notice.

Contents

7.17 Interrupting and continuing the vacation 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 set points

. . . . . . . . . . . . . 50

8.2

Creating a new heating program

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

8.3

Creating a new DHW program

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

8.4

Creating a new DHW recirculation pump program

. . . . . . . . . . . . . . . . . . . . . . 63

9 Modules and their functions

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

9.1

ZM434 burner and boiler circuit module (standard equipment)

. . . . . . . . . . . . . . 65

9.2

FM441 function module (accessory)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

9.3

FM442 function module (accessory)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

10 Boiler flue gas test

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

11 Correcting faults and troubleshooting

. . . . . . . . . . . . . . . . . . . . . . . . . . . 71

11.1 Simple troubleshooting

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

11.2 Troubleshooting

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

12 Operation in the event of a fault

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

12.1 Emergency operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

13 Setup log

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

14 Index

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Logamatic 4321/4322 - Technical specifications are subject to change without prior notice.

3

1 Introduction

1 Introduction

With your purchase of this Logamatic control panel 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 panel enables you to operate your heating system so that you can combine your economical and ecological aspirations. Of course, your personal comfort is always the priority.

The control panel, which is controlled by the MEC2 remote control, 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 remote control is the central control.

Some functions that you may need are located behind a flap. The buttons behind this flap enable you to make various adjustments.

The control concept is:

"Push and turn"

"The control speaks your language."

Your heating system offers a wealth of other useful functions. Some examples of these are:

– Automatic warm weather shut down (WWSD) changeover

– Party/pause function

– Vacation function

– DHW heating at the touch of a button


What you should know about your heating system 2


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 recognize 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 more advantage you will be able to take of them.

How does your heating system work?

Your heating system comprises the boiler with burner, the heating control panel, the piping and the radiators or radiation of some type. A DHW storage tank or an instantaneous water heater heats the water used for shower, bath or washing your hands. Depending on the way your heating system has been installed, it can operate either purely as a central heating system or together with a DHW storage tank. It is important 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 pipes to the consumers (radiators, radiant heating system, etc).


5


Fig. 1 shows the heating zone of a pumped central heating system: The burner [2] heats the water inside the boiler [1]. This boiler water is transported by the pump [3] through the system supply pipe [4] to the radiators [6]. The boiler water flows through the radiators, and in doing so, gives off some of its heat. The boiler 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 radiator valves [5]. All radiators are supplied with the same supply temperature. The heat transferred to the room depends on the radiator surface and the boiler water throughput. Therefore, the heat transfer can be manipulated via the radiator valves.

Fig. 1 Pumped central heating design

1 Boiler

2 Burner

3 Circulator

4 System supply pipe

5 Radiator valves

6 Radiator

7 System return pipe

What determines the heat demand of a room?

The heat demand of a room largely depends on the following factors:

– outdoor temperature

– the desired room temperature

– the type of construction/insulation of the building

– the wind factor

– solar gain

– the internal heat sources

(open fireplace, occupants, lamps, etc.)

– closed or open windows

You should take these factors into consideration to achieve a comfortable room temperature.

Fig. 2 Influences on the room climate


Why do you need a heating control panel?

The control panel ensures convenient heat and economical consumption of fuel and electrical energy.

It switches the heat generator (boiler and burner) and pumps ON, if warm rooms or hot water are desired. In doing so, it uses the components of your heating system at the correct time.

Furthermore, your heating system records different variables that influence the room temperature and compensates for these.

What does the heating control panel calculate?

Advanced control panels calculate the boiler temperature (the so-called supply temperature) subject to the outdoor temperature. The relationship between the outdoor temperature and the supply temperature is described as the heating curve. The lower the outdoor temperature, the higher the supply temperature must be.

The control panel can operate in three control modes:

– Weather-compensated control (outdoor reset)

– Room temperature control (room reset)

– Weather-compensated control with room temperature compensation

(outdoor reset with room compensation)


Fig. 3 Heating zone curve (example) x Outdoor temperature y Supply temperature


7


Weather-compensated control

With weather-compensated control, only the outdoor temperature captured by the outdoor temperature sensor is decisive for the supply temperature. Room temperature fluctuations through radiant energy from the sun, occupants, open fireplaces or similar external heat sources are not considered.

If you use this type of control, adjust the radiator valves

(if equipped) so that the desired room temperature is achieved in the different rooms.

Room temperature-dependent control

Another possible heating control method is room temperature-dependent control. The control panel calculates the supply temperature based on the set and actual room temperatures.

To be able to use the room temperature control, you need a room that is representative of your whole home.

All factors influencing the temperature in this "reference room" – where the remote control is located – will also apply to all other rooms. Not every home has a room that meets these requirements. Pure room temperaturedependent control has certain limitations in such cases.

Should you, for example, open a window in the room where the room temperature is measured, the control panel 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 panel "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 radiator valves (if equipped) in the reference room fully open.

Weather-compensated control with room temperature compensation

Weather-compensated control with room temperature compensation combines the advantages of the other two control modes. The desired supply temperature, which is mainly subject to the outdoor temperature, can be adjusted by the room temperature to only a limited degree. This achieves improved maintenance of the room temperature within the room containing the user interface without completely ignoring the other rooms.

With this kind of control you will also need to keep all radiator valves (if equipped) in the reference room fully open.

Why do the 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 radiator 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 heating control panel will try to counteract the sinking room temperature by raising the supply temperature. However, raising the supply temperature will not raise the room temperature, since the radiator valve continues to limit the room temperature.

A supply temperature that is too high results in unnecessary heat losses in boiler and piping. At the same time, the temperature in all rooms without radiator valves increases due to the higher boiler water temperature.


Why do I need a timer?

Advanced heating systems are equipped with a timer to save energy. With a timer, 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 at other times when a reduced temperature is sufficient, while operating your heating system with the standard room temperature during the day.

You have four options for reducing the room temperature via the control panel. Your heating contractor will select one according to your requirements and will set it up for you:

– Total shutdown (no room temperature control)

– Rreduced room temperature (a reduced room temperature will be maintained)

– Change between total shutdown and reduced heating subject to room temperature

– Change between total shutdown and reduced heating subject to outdoor temperature

With total shutdown of the heating system, no pumps or other system components are operated. Heating only starts up again 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 supply temperature.

When changing from total shutdown to reduced

heating, the boiler will remain shut down as long as the

room temperature exceeds a set level. This function is only available if a room temperature sensor is installed.

When changing from total shutdown to reduced

heating based on outdoor temperature, the boiler will remain shut down as long as the outdoor temperature

exceeds a preset level.


What are heating zones?

A heating zone describes the circuit made by the boiler water from the boiler via the radiators and back again

( Æ Fig 1, page 6). A simple heating zone comprises a heat generator, a supply pipe, a radiator and a return pipe. A pump installed in the piping circulates the boiler water.

Several heating zones may be connected to one boiler, for example, one heating zone for supplying radiators and another zone for supplying a radiant floor heating system. In this case, the radiators are supplied at a higher supply temperature than the radiant floor heating system.

The supply of different supply temperatures to different heating zones can be achieved by e.g. installing a

3-way mixing valve between the heat source and the radiant floor heating system.

Using an additional temperature sensor in the supply of the heating zone to be supplied, sufficient cold return water is mixed via a 3-way mixing valve into the hot flow water, to achieve the desired lower temperature. It is important to note that heating zones with 3-way mixing valves require an additional pump. This pump enables the second heating zone to be operated independently of the first heating zone.


9



Here are a few tips on how to heat economically without sacrificing convenience: z Only heat if you need warmth. Use the preset heating programs (standard programs) in the control panel, or those that have been tailored to your individual requirements.

z Air rooms properly 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 fresh air changes and wastes valuable energy.

z Close the radiator valves while ventilating.

z Windows and doors are places where a lot of heat is lost. Therefore, check whether the doors and windows are sealed correctly. Close shutters

(if installed) at night. z Never position large objects such as a sofa or a desk immediately in front of the radiators (maintain a clearance of at least 20" (0.50 m). 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 70 °F (21 °C), whilst 63 °F (17 °C) may be sufficient at night.

To achieve this, use the standard heating mode

(day mode) and the 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

70 °F (21 °C) to 68 °F (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 use the automatic warm weather shut down ( Æ Chapter 7).

z A pleasant room climate depends not only on the room temperature, but also on the relative humidity.

The drier a room, the cooler it feels. You can optimize the relative humidity with house plants.

z You can also save money when heating DHW:

Only operate the recirculation pump via a timer.

Research has shown that it is generally sufficient to run the recirculation pump for only three minutes every half hour.

z Arrange with your local heating contractor to have your heating system serviced annually.


Safety 4

4 Safety

4.1

About this manual

These operating instructions contain important information for the safe and appropriate operation of your heating system with the Logamatic 4321 and 4322 control panels.

CAUTION!

RISK OF INJURY/

SYSTEM DAMAGE

Indicates a potentially dangerous situation that could cause minor or moderately serious injuries or damage to property.

USER NOTE

Tip for optimum use of equipment and adjustment as well as useful information.

4.2

Designated use

The Logamatic 4321 and 4322 control panels are designed to control and monitor heating systems with different types of boilers in multi-occupancy dwellings, residential complexes, and buildings with medium to large heat demand.

4.3

Standards, regulations and directives

USER NOTE

Observe all regulations and standards applicable to installation and operation of the system in your country.

USER NOTE

All electrical components must be approved for the USA and Canada!

This product has been tested and certified and meets applicable standards for the

US and Canadian markets.

4.4

Key to symbols

Two levels of danger are identified and signified by the following terms:

WARNING!

RISK OF LIFE

Identifies possible dangers emanating from a product, which might cause serious injury or death if appropriate care is not taken.

4.5

Please observe these notes

z Only operate the control panel as intended and if it is in perfect working order.

z The heating contractor must give detailed instructions on the operation of the system.

z Please read these operating instructions carefully.

z Only the operating characteristics listed in this manual may be input and modified. Other entries alter the control programs of the heating system and can lead to incorrect system functions.

z Maintenance, repairs and fault diagnosis must be carried out by trained technicians only.

WARNING!

RISK OF LIFE due to electric shock!

z Never open the control panel.

z In an emergency, switch off the control panel (e.g. with the heating system emergency shut-off switch) or isolate the heating system from the power supply by disengaging the heating system circuit breaker and prevent from accidental reconnection.

z Arrange for your heating contractor to rectify any heating system faults immediately.


11

4 Safety

CAUTION!

RISK OF INJURY/

SYSTEM DAMAGE due to operator error!

Operator errors can cause injury and damage to property.

z Ensure that children never operate the appliance unsupervised or play with it.

z Ensure that only personnel trained to operate the appliance correctly have access to it.

RISK OF SCALDING

WARNING!

During thermal disinfection the entire

DHW system is factory-set to be heated to

158 °F (70 °C) (start time: Tuesday night at 1:00 am (01:00)). Hot water temperatures above 122 °F (50 °C) can cause scalding almost immediately .

z The default start time can be changed to another time by a heating contractor if desired (shift work).

z If thermal disinfection is activated, ensure that a thermostatic tempering valve is installed as protection against scalding.

CAUTION!

SYSTEM DAMAGE from frost.

The heating system can freeze up in cold weather, if switched off.

z Protect your heating system against frost damage by draining it and the

DHW piping at the lowest possible point.

4.6

Cleaning control

z Clean the control panel with a damp cloth only.

4.7

Disposal

z Dispose of the control panel packaging in an environmentally-responsible manner.

z The lithium battery in the CM431 module must be replaced by a heating contractor only.



5.1

Controls on the basic unit

Controls and MEC2 remote control 5

Fig. 4 Logamatic 4321 control panel - controls (standard delivery)

1 Safety temperature limiter

2 Manual boiler thermostat

3 L1, L2 Fuses

4

5

6

Connection for external service equipment and MEC2

Burner emergency operation switch

On/Off switch

Fig. 5 Modules installed

1 Slot 1: e.g. FM442 – heating zone 1, heating zone 2

2 Slot 2: e.g. FM442 – heating zone 3, heating zone 4

A Slot A: ZM434 – boiler loop, burner

B Slot B: MEC2 (CM431) – MEC2 remote control

3 Slot 3: e.g. FM441 – heating zone 5, DHW/recirculation

4 Slot 4: e.g. FM458 – strategy module (for multi-boiler systems)


13


5.2

MEC2 remote control

The MEC2 remote control is the central element used to operate the Logamatic 4321/4322 control panel.

Display

The display ( Æ Fig 6, [4]) indicates functions and operating values, e.g. the actual room temperature.

Dial

The dial ( Æ Fig 6, [5]) is used to set new values and scroll through the menus.

Buttons

You control the functions via the buttons, and the relevant indications appear on the display. To change a value, push and hold the button, then turn the dial.

When the button is released, the new value is implemented and saved.

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 buttons ( Æ Fig 6, [1] to [3] and [6]).

Behind a flap (

Æ Fig 6, [7]) additional buttons are available for further settings, e.g. for entering weekdays or setting the time.

The unit automatically returns to the standard display if no entry is detected for some time.

3

2

1

6 720 618 326-06.1RS

Fig. 6 MEC2 remote control

1 Continuously reduced heating mode

2 Automatic heating mode by timer

3 Continuous heating mode

4 Display

5 Dial

6 Input DHW temperature/reloading

7 Flap for the keypad of control level 2

4

5

6

7


Controls and MEC2 remote control 5


3

4

5

1

2

6

7

8

Fig. 7 MEC2 remote control

1 Display

2 Dial

3 Continuous heating mode

4 Automatic heating mode by timer

5 Continuously reduced heating mode

6 Input day

7 Input vacation days

8 Select standard display

9

10

11

12

13

14

16 15

6 720 618 328-01.1RS

9 Display for set nominal room temperature

10 Input DHW temperature/reloading

11 Set the time

12 Change temperature values

13 Warm weather shut down (WWSD) temperature

14 Back to standard display

15 Select a timer program

16 Select heating zones/DHW zone


15


5.3

Switching on the control

z Check that the control panel ON/OFF switch

( Æ Fig 8, [1]) and the manual switches on the installed modules (

Æ Fig 8, [2]) are set to "I" and

"AUT".

z Switch the control panel ON by setting the ON/OFF switch to "I" ( Æ Fig 8, [1]).

After approximately 2 minutes all modules installed in the control panel are recognized and the standard display is shown.

5.4

Switching off the control panel

z Switch the control panel OFF by setting the ON/OFF switch to "0" ( Æ Fig 8, [1]).

z In an emergency: Isolate the heating system from the mains supply with the emergency shut-off switch outside of the boiler room, or by disengaging the heating system circuit breaker.

2

Fig. 8 On/Off switch

1 On/Off switch

2 Manual switches

1

6 720 618 326-13.1RS


Basic functions 6


In this chapter you will find information about the standard functions of the MEC2 remote control and their use. The standard functions are:

– Selecting the operating mode

– Setting the room temperature

– Setting the DHW temperature

– Loading DHW once

6.1

Simple operation

The standard functions are controlled by pressing one of the buttons on the

"Standard functions" keypad or by turning the dial.

AUT room temp set

70°F day mode always

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" button lights up; day mode is enabled.

Set the desired room temperature by turning the dial.

(Condition: For this, the flap must be closed.)

The display shows the set value.


17


USER NOTE

If your heating system is equipped with several heating zones, first select the correct heating zone ( Æ Chapter 7.6). Only then can you select the operating mode and room temperature.

USER NOTE

The following MEC2 screens only cover the available screens:

– of module ZM434 (standard equipment) and

– of the most common modules FM441 and FM442 (accessories).

Depending on the way your heating contractor has configured your system, one or more MEC2 screens may not appear, although the above modules are installed in your control panel.

Detailed descriptions of MEC2 screens 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, depending on whether the MEC2 is installed in the control panel or is installed as a wall-mounted remote control unit.

Factory-set permanent display if the MEC2 is installed in the control panel.

boiler temp outdoor temp

113°F

70°F room temp

67°F outdoor temp

32°F

Factory-set permanent display if the MEC2 is installed as a wall-mounted remote control unit.

USER NOTE

The display "system supply" will only be shown for multi-boiler systems.



6.3

Select operating mode

AUT

You can operate the MEC2 remote control in two ways:

– in automatic mode

– in manual mode

Automatic mode

Typically, buildings are heated less at night than during the day. With the MEC2 remote control, you don't need to adjust the radiator valves before bedtime or in the morning. The automatic changeover of the MEC2 remote control does this for you. It switches between day mode (standard mode) and night mode

(setback mode).

The times when 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 operation

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.


19


AUT room temp set

70°F automatic day

6.3.1 Selecting automatic mode

In automatic mode your heating system will operate with the timer program, i.e. central and DHW heating at preset times.

Example: Enabling automatic mode

Press "AUT".

The LED of the AUT button is on; automatic mode is active.

In addition, either the "Day mode" or "Night mode" LED will light up. 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.

1

70 °F

(21 °C)

2

5:30 am

(05:30)

10:00 pm

(22:00)

63 °F

(17 °C)

Fig. 9 Changeover from day and night mode at fixed times (example)

6 720 618 326-05.1RS

1 Day mode

2 Night mode



6.3.2 Selecting manual mode

Press either "Day mode" or "Night mode" to change to manual mode.

Press "Day mode".

The LED of the day mode button lights up. Now your heating system is in constant day mode (standard mode).

room temp set

70°F day mode always room temp set

63°F night mode alwys

Press "Night mode".

The LED of the night mode button lights up. Now your heating system is in constant night mode (setback heating mode), and operates at a lower room temperature.

USER NOTE

If you have selected manual mode, other automatic controls will also be switched off, e.g. the summer/wintertime changeover ( Æ Chapter 7.13).


21


6.4

Set the room temperature

AUT

With the flap closed you can adjust the room temperature with the dial. With the flap open, also press "Day mode" or "Night mode".

With the dial, you can select the room temperature in degree steps between

52 °F (11 °C) (day), or 36 °F (2 °C) (night), and 86 °F (30 °C). The set temperature is displayed via an LED next to the dial. For temperatures below

59 °F (15 °C) or above 77 °F (25 °C), the "–" or "+" LED illuminates.

The factory setting for the day room temperature is 70 °F (21 °C).

The factory setting for the night room temperature is 63 °F (17 °C).

Any adjustment applies to all heating zones allocated to the MEC2 remote control ( Æ Chapter 7.7).

USER NOTE

The set room temperature applies to the currently active heating mode, i.e. day or night mode. You can identify which heating mode is ON depending on which green LED is lit up.

6.4.1 For the current operating mode

You are currently in automatic "Day mode" and would like to change the room temperature.

(Condition: For this, the user interface flap must be closed.)

Turn the dial to the desired day room temperature (here: "73°F" (23°C)).

room temp set

73°F automatic day

The day room temperature is now adjusted to 73 °F (23 °C). The selected permanent display will then appear again.


+


6.4.2 For the operating mode not currently enabled

You may also adjust the room temperature for an operating mode that is currently inactive.

For example, you are currently in automatic day mode and would like to change the set night temperature.

Hold down "Night mode", and select the desired night room temperature with the dial (here: "61°F" (16°C)).

Release the "Night mode" button.

The selected night temperature is now set to 61 °F (16 °C). The selected permanent display will then appear again. room temp set


AUT

Press "AUT".

The "AUT" LED lights up; automatic mode is re-enabled.

USER NOTE

If you are currently in automatic night mode, and you wish to adjust the day mode, proceed as described above, but instead hold down "Day mode".


23


6.5

Heating domestic hot water

The user interface also offers you the option of heating DHW in an energyconscious manner. For this purpose, DHW heating can be selected via a timer.

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 140 °F (60 °C) in automatic mode.

1

2

140 °F

(60 °C)

5:30 am

(05:30)

9:00 am

(09:00)

3

Fig. 10 Example: DHW heating

1 Day mode

2 Night mode

3 OFF

6:00 pm

(18:00)

9:00 pm

(21:00)

6 720 618 326-07.1RS

We recommend heating the DHW storage tank once in the morning, before central heating begins, and reheating once in the evening if necessary

(

Æ Fig 10).

USER NOTE

The DHW temperature has fallen below the set value if the green "DHW" LED lights up.


DHW set

+

WARNING!


6.5.1 Setting the hot water temperature

RISK OF SCALDING from DHW.

Hot water temperatures above 122 °F (50 °C) can cause scalding almost immediately.

z Do not draw off DHW unmixed.

z Ensure that a thermostat-controlled mixing valve is installed as protection against scalding.

You can change the DHW temperature:

Hold the DHW button down and select the desired DHW temperature with the dial.

Release the DHW button. The newly-selected DHW temperature is saved within approximately 2 seconds. The permanent display will then appear again.

140°F

DHW actual reloading

131°F

USER NOTE

For thermal disinfection, the DHW will be heated to at least 140 °F (60 °C) once or twice per week to kill off possible bacteria (e.g. legionella).

6.5.2 Single DHW charge

If the "DHW" LED lights up, only a limited amount of hot water remains in the

DHW storage tank. Should you want a larger amount of DHW, proceed as follows:

Press "DHW".

The "DHW" LED flashes, and a single DHW charge is started.

Depending on the size of the storage tank 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.


25



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 may use the following functions:

– Display the current operating values of your heating system

– Set the time

– Set date

– Adjust heating zones

– Select a heating program

– Set the room temperature for additional heating zones

The buttons for the extended functions are located behind the flap of the MEC2 remote control.

7.1

Buttons for extended functions

1

2

3

6

7

4

5

9 8

7 747 012 073-01.1RS

Fig. 11 Buttons for the extended functions

1 Input day

2 Input vacation days

3 Select standard display

4 Set the time

5 Change temperature values

6 Warm weather shut down (WWSD) temperature

7 Back to standard display

8 Select a timer program

9 Select heating zones/DHW zone


Extended functions 7

7.2

Controlling the extended functions

+

The extended functions provide access to an additional control level. At this level, proceed according to the "Push and turn" principle. The control procedure is always similar: z Open flap.

Hold the desired button down, e.g. the "Time" button, and simultaneously turn the dial.

By turning the dial, you modify the values that flash on the display.

Release the button. Modified values are saved.

"Back" button = Exit menu.

7.3

Displaying operating values

You can display and control the various operating values of the boiler, of the selected heating zone, and the system.

Only the operating values of the selected heating zone, e.g. heating zone 1, are displayed (

Æ Chapter 7.6).

z Open flap.

Turn the dial clockwise without pressing any other button.

heating zone 0 room temp set

68°F

Depending on the modules, various of the following operating displays can be called up:

– Burner and run time

– Actual heating zone room temperature

– Set room temperature of heating zone

– Operating status of heating zone

– Measured supply temperature of heating zone

– Measured DHW temperature*

– Set DHW temperature*

– DHW operating mode*

– Operating status of recirculation pump and tank primary pump*

* Only if a DHW module has been installed.


27


7.4

Changing the permanent display

You can determine the permanent display of the user interface.

The following permanent displays are available:

– Boiler temperature or system supply (if MEC2 is wall-mounted)

– Outdoor temperature

– DHW*

– Time

– Date

* Only if a DHW module has been installed.

+ system supply

113°F date

08/20/2009

Hold the "Display" button down, and select the desired permanent display with the dial (here: "date").

Release the "Display" button. The selected permanent display has now been saved.



7.5

Setting the date and time

USER NOTE

Date and time are preset at the factory. This function is backed up by battery power independent of the mains power supply.

Setting the date

Hold "Weekday" down, and select the desired date with the dial (here: "20").

set date

08/20/2009

Monday

The name of the day automatically changes (here "Monday") if you set the date using the dial (here "20").

Release "Weekday" to save your input.

Press "Weekday" again to enter the month.

Press "Weekday" again to enter the year.

The flashing item can be modified with the dial.

Setting the time

Hold down "Time", and select the desired time with the dial.

+ set time

+

03:52:58

The time is set in one-minute steps.

Release "Time" to save your input.


29


7.6

Selecting a heating zone

Your heating system may be equipped with several heating zones. If you want to change a setting, e.g. the heating program, first select the heating zone whose setting you want to change.

Depending on the equipment level of your heating system, the following heating zones can be selected:

– MEC2 heating zones (all heating zones assigned to the MEC2,

Æ Chapter 7.8)

– Heating zone 1 – 8

– DHW

– DHW recirculation

+ z Open flap.

Hold down "Heating zone" and select the desired heating zone with the dial

(here: "heating zone 2").

select heat zone heating zone 2

Release the "Heating zone" button. The displayed heating zone is now selected.

As soon as the heating zone has been selected, the display returns to the permanent display.



7.7

Adjusting the room temperature for another heating zone

AUT

+

Your heating system may be equipped with several heating zones. If you want to change the room temperature for a different heating zone than the one last selected, first select the desired heating zone.

Depending on the equipment level of your heating system, the following heating zones can be selected:

– MEC2 heating zones (all heating zones assigned to the MEC2,

Æ Chapter 7.8)

– Heating zone 1 – 8

If several heating zones are assigned to the MEC2, the temperature for these heating zones can only be adjusted for all. Otherwise a fault message "selection not supported MEC heatingzones select" will appear. In such cases select "MEC heatingzones". z Open flap.

Hold down "Heating zone" and select the desired heating zone with the dial

(here: "heating zone 2").

Release the "Heating zone" button. The displayed heating zone is now selected.

select heat zone heating zone 2

As soon as the heating zone has been selected, the display returns to the permanent display.

room temp

67°F outdoor temp

32°F


31


+ room temp set

70°F automatic day

Press and hold down "Temp". First, the heating zone 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 for the heating zone with the dial (here: "70°F" (21°C)).

Release the button to save your input.

The day room temperature is now adjusted to 70 °F (21 °C). The selected permanent display will then appear again.

USER NOTE

If you want the adjust the temperature for an operating mode that is not the current mode, first select the corresponding operating mode (e.g. by pressing

"Night mode"). After changing the temperature, reset the operating mode to the previous setting.

USER NOTE

For heating zones with individual remote control panels (e.g. BFU), you can adjust the room temperature only via this remote control ( Æ instructions for the relevant remote control panel).



7.8

Heating zones with MEC2 remote control

selection not supported

MEC heatingzones select timer not supported primary zone select

During installation, your heating contractor will determine which heating zones are to be controlled by the MEC2 remote control. These heating zones are "MEC heatingzones".

MEC heating zones

The following adjustments made at the MEC2 apply all to "MEC heatingzones" simultaneously:

– Set the room temperature

– Set the warm weather shut down (WWSD) temperature

– Select operating mode

– Set the vacation function

– Set the party or pause function

If you have selected an individual heating zone that is assigned to the MEC2, and you want to make one of the above adjustments, the fault message

"selection not supported MEC heatingzones select" will appear.

Select "MEC heatingzones" to program these settings ( Æ Chapter 7.6).

Individual heating zones

The following adjustments can only be implemented for each individual heating zone separately:

– Select the standard program

– Change the standard program by moving set points

– Insert or delete set points

– Delete or connect heating phases

– Create a heating, DHW or recirculation pump program

If you have selected "MEC heatingzones", and you want to make one of the above adjustments, the fault message "timer not supported primary zone select" will appear.

Enter these settings for each heating zone separately ( Æ Chapter 7.6).


33


7.9

Selecting and modifying a heating program

7.9.1 What is a heating program?

A heating program automatically switches the operating mode (day and night mode) at fixed times. This automatic changeover is based on a timer.

Before you use this option, consider the following:

– At what time in the morning should your home be warm? Does this time vary depending on the day of the week?

– Are there days when you don't want to heat?

– From what time in the evening does your home no longer need to be heated?

This too may vary depending on the day of the week.

It may vary how long it takes your heating system to heat up individual rooms.

This will be subject to the outdoor temperature, the building insulation and the drop in room temperature.

The "optimization" function of the user interface 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 when your home should be warm.

With the user interface, Buderus offers eight different, preset heating programs as standard programs.

Fig. 12 Example for a standard program (here: "Family program" from Monday to

Thursday)

1 Day mode

2 Night mode

USER NOTE

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.



7.9.2 Timer program for DHW

You may enter your own heating program for DHW heating. This saves you energy.

Determine the switch points so that DHW is only available when one heating zone is in standard heating mode (day mode). In this case, DHW is heated thirty minutes before day mode of the first heating zone, so it is available at the selected time.

Fig. 13 DHW heating begins 30 minutes before day mode of the first heating zone, and ends with the beginning of night mode of the last heating zone.

A Heating zone 1

B Heating zone 2

C DHW

1 Day mode

2 Night mode

If you require additional hot water, you may, at short notice, heat DHW with the

"ext DHW load" function ( Æ Chapter 6.5.2).

USER NOTE

DHW will not be subject to a temperature setback if you operate one heating zone in "day mode always", and DHW is being heated by "heating zone".

USER NOTE

DHW will not be heated if you are operating all heating zones in "night mode alwys" and DHW is heated by "heating zone".


35


7.10 Selecting a standard program

The MEC2 remote control 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 set points, and then the times. The "family" program is preset at the factory.

+ z Open flap.

z Select a heating zone (Æ Chapter 7.6).

Press and hold down "PROG". Initially the selected heating zone is displayed for setting the standard program. Approximately 2 seconds later the designation of the currently selected standard program will appear.

Select the desired standard program with the dial (here: "seniors").

Release the "PROG" button. The displayed program is now selected.

timer program selction seniors seniors' program

Monday at 05:30am 70°F

The display shows the program designation and the first set point for the selected heating program (here "seniors' program").

Press "Back" to return to the permanent display.

USER NOTE

Switching programs are only effective in automatic mode (

Æ Chapter 6.3.1).



7.11 Summary of standard programs

Program name Day of week

"family"

Factory setting

"early morning"

Early shift

Mo – Th

Fr

Sat

Sun

Mo – Th

Fr

Sat

Sun

ON OFF

5:30 am (05:30)

5:30 am (05:30)

6:30 am (06:30)

7:00 am (07:00)

10:00 pm (22:00)

11:00 pm (23:00)

11:30 pm (23:30)

10:00 pm (22:00)

4:30 am (04:30)

4:30 am (04:30)

6:30 am (06:30)

7:00 am (07:00)

10:00 pm (22:00)

11:00 pm (23:00)

11:30 pm (23:30)

10:00 pm (22:00)

"evening"

Late shift

"morning"

Part-time work in the morning

"afternoon"

Part-time work in the afternoon

Mo – Fr

Sat

Sun

Mo – Th

Fr

Sat

Sun

Mo – Th

Fr

Sat

Sun

ON OFF

6:30 am (06:30)

6:30 am (06:30)

7:00 am (07:00)

11:00 pm (23:00)

11:30 pm (23:30)

11:00 pm (23:00)

5:30 am (05:30)

5:30 am (05:30)

6:30 am (06:30)

7:00 am (07:00)

8:30 am (08:30)

8:30 am (08:30)

11:30 pm (23:30)

10:00 pm (22:00)

12:00 am (12:00)

12:00 am (12:00)

10:00 pm (22:00)

11:00 pm (23:00)

6:00 am (06:00)

6:00 am (06:00)

6:30 am (06:30)

7:00 am (07:00)

11:30 am (11:30)

11:30 am (11:30)

11:30 pm (23:30)

10:00 pm (22:00)

4:00 pm (16:00)

3:00 pm (15:00)

10:00 pm (22:00)

11:00 pm (23:00)

"midday"

Midday at home

"singles"

"seniors"

ON OFF

Mo – Th

Fr

Sat

Sun

Mo – Th

Fr

Sat

Sun

6:00 am (06:00)

6:00 am (06:00)

6:00 am (06:00)

7:00 am (07:00)

6:00 am (06:00)

6:00 am (06:00)

7:00 am (07:00)

8:00 am (08:00)

8:00 am (08:00)

8:00 am (08:00)

11:00 pm (23:00)

10:00 pm (22:00)

8:00 am (08:00)

8:00 am (08:00)

11:30 pm (23:30)

10:00 pm (22:00)

Mo – Su 5:30 am (05:30) 10:00 pm (22:00)

11:30 am (11:30)

11:30 am (11:30)

1:00 pm (13:00)

11:00 pm (23:00)

5:00 pm (17:00) 10:00 pm (22:00)

4:00 pm (16:00)

3:00 pm (15:00)

10:00 pm (22:00)

11:00 pm (23:00)

You can enter your own individual program here:

"new"

"custom 1"

If none of the standard programs suit you, you may change them, have them changed by your heating contractor, or enter a new heating program (

Æ Chapter 8.2). This will be saved under "custom" and the number of the heating zone.

Tab. 1 Standard programs ("ON" = day mode, "OFF" = night mode)


37


7.12 Modifying the standard program by moving set points

If the set points, i.e. the times of a standard program when the system changes over between day and night mode, only partially suit you, you may change them, or ask your heating contractor to change them for you. The modified standard program is saved under "custom" and the number of the heating zone. The heating program memory is available for this.

The following example shows how the set points of the standard program

"family" can be changed for the days Monday to Thursday.

38

Fig. 14 Changing the set points from 5:30 am to 6:30 am (05:30 to 06:30 h) and from

10:00 pm to 11:00 pm (22:00 to 23:00 h) (example)

A "family program"

B New program "custom program 2"

1 Day mode

2 Night mode z Open flap.

z Select a heating zone (here: "heating zone 2" Æ Chapter 7.6).

Hold down "PROG" and select the desired standard program with the dial.

+

Release the "PROG" button.

timer program selction family family program


The first set point (Monday, 5:30 am (05:30 h)) appears.


+ custom program 2



Hold down "Time", and select the desired time with the dial. Example: "06:30am"

(06:30).

Release "Time". The newly adjusted time for the "ON" set point is now saved.

The modified set point will be saved under the "custom" program and the number of the heating zone (here "2").

+

Continue to turn the dial until the next set point that you want to change is displayed.

The "OFF" set point for Monday appears. Now you can modify the time for the

"OFF" set point.

Hold down "Time", and select the desired time with the dial. Example:

"11:00pm" (23:00).

Release "Time". The newly-adjusted time for the "OFF" set point is saved.

Next set point

Continue to turn the dial until the next set point is displayed.

The next set point (Tuesday, 5:30 am (05:30 h)) appears.

Also change the following set points to 6:30 am (06:30 h) and

11:00 pm (23:00 h). The system will now heat from 6:30 am to 11:00 pm (06:30 h to 23:00 h) Monday to Thursday.


USER NOTE

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.

z Ensure that a stop point is associated with every start point.

The modified standard program is saved under "custom" and the number of the heating zone.


39


7.13 Setting the warm weather shut down (WWSD) temperature

In addition to the outdoor temperature, your control panel considers the ability of the building to store heat and its thermal insulation (creating from these the

"Adjusted outdoor temperature",

Æ Fig. 15). After a delay, it automatically changes over between summer and winter mode.

AUT

AUT

Fig. 15 Current and adjusted outdoor temperatures compared

1 Current outdoor temperature

2 Adjusted outdoor temperature x Time y Temperature

Summer mode

Heating operation is switched off if the "Adjusted outdoor temperature" exceeds the factory-set changeover threshold of 63 °F (17 °C).

Summer mode is identified on the display with the

DHW heating remains operational.

icon.

Press "Day mode" if you want to heat at short notice although the system is in summer mode.

The heating system returns to automatic summer mode if you press "AUT".


+


Winter mode

DHW and central heating are operational if the "Adjusted outdoor temperature" falls below the factory-set changeover threshold of 63 °F (17 °C).

Setting automatic warm weather shut down (WWSD) temperature

The desired heating zone must be selected before setting the WWSD temperature. One single heating zone or all heating zones allocated to the

MEC2 can be selected.


Example: Heating zone 2

Setting the changeover temperature

Hold down "Su/Wi". The display briefly shows the heating zone. Then turn the dial to the desired changeover temperature, below which you want to heat

(here: "64°F" (18°C)).

The display shows the set changeover temperature.

Release "Su/Wi" to save your input.

summer / winter strt WWSD

64°F

+ summer / winter summr mode alwys

Setting continuous summer mode z Select a heating zone (Æ Chapter 7.6).


Hold down "Su/Wi". The display briefly shows the heating zone. Then turn the dial to a changeover temperature below 50 °F (10 °C).

The display shows "summr mode alwys".

Release "Su/Wi" to save your input.

Your heating system will constantly operate in summer mode.

+ summer / winter wintr mode alwys

Setting continuous winter mode z Select a heating zone (Æ Chapter 7.6).


Hold down "Su/Wi". The display briefly shows the heating zone. Then turn the dial to a changeover temperature above 86 °F (30 °C).

The display shows "wintr mode alwys".

Release "Su/Wi" to save your input.Your heating system operates continuously in winter mode.


41


7.14 Setting the DHW operating mode

This allows you to change the DHW temperature in the DHW storage tank.

AUT z Open flap.

Hold down "Heating zone" and select "DHW" with the dial.

+

Release the "Heating zone" button.

select heat zone

DHW

Then the permanent display will be shown again.

room temp

67°F outdoor temp

32°F

AUT

Select one of the following operating modes for DHW:

– "constant oper."

The water inside the DHW storage tank is constantly maintained at the set temperature.

Press "Day mode" to select constant operation. After approximately three seconds, the permanent display will appear again.

– "automatic"

30 minutes before the first heating zone is switched on, the DHW storage tank will heat the water to the set temperature, and stop when the last heating zone is switched off (factory setting). Alternatively, you can enter your own

DHW program (

Æ Chapter 8.3).

Press "Automatic" to select automatic mode. After approximately three seconds, the permanent display will appear again.

– "DHW OFF"

DHW heating is switched off. By pressing "DHW", you will switch heating on for a single DHW charge.

Press "Night mode" to stop DHW heating. After approximately three seconds, the permanent display will appear again.



7.15 Setting the operating mode for DHW recirculation

The DHW recirculation pump provides an almost instantaneous supply of DHW to the taps. For this, the DHW is circulated by a separate DHW recirculation pump twice per hour for three minutes. Your heating contractor can match this interval to your individual requirements at the service level.

You can modify the operating mode of DHW recirculation as follows:

AUT z Open flap.

Hold down "Heating zone" and select "recirculation" with the dial.

+

Release the "Heating zone" button.

select heat zone recirculation

Then the permanent display will be shown again. room temp

67°F outdoor temp

32°F

AUT

Select one of the following operating modes for the DHW recirculation pump:

– "constant oper."

The DHW recirculation pump will operate at the set interval, i.e. independently of the heating zones.

Press "Day mode" to select constant operation. After approximately three seconds, the permanent display will appear again.

– "automatic"

30 minutes before the first heating zone is switched on, the DHW recirculation pump starts to run at the set interval, and stops when the last heating zone is switched off (factory setting). Alternatively, you can enter your own DHW recirculation pump program ( Æ Chapter 8.4).

Press "Automatic" to select automatic mode. After approximately three seconds, the permanent display will appear again.

– "recirculat. OFF"

The DHW recirculation pump will not be controlled. Pressing "DHW" switches the DHW recirculation pump on for the duration of a single DHW charge.

Press "Night mode" to switch off DHW recirculation. After approximately three seconds, the permanent display will appear again.


43


7.16 Set the vacation function

Using the vacation function, you can heat at a lower room temperature if you are away for a prolonged period.

Example:

If you are on vacation for the next five days and you want to heat less during that time, operating heating zone 2 with a reduced room temperature of 54 °F

(12 °C), for example.

USER NOTE

As the vacation function is enabled immediately after completing your entry, you should only enter this function on the day of your departure. z Select a heating zone (Æ Chapter 7.6).


Enter vacation function:

+ vacation days

5 room temp set

63°F

Hold "Vacation" down, and select the desired number of days with the dial

(here: "5").

The display shows "5".

Release "Vacation" to save your input.

USER NOTE

The "room temp set" display only appears if the "room setback" vacation reduction type or "setback" has been set by the heating contractor.


+ vacation days

5 room temp set

54°F


Hold "Temp" down, and select the desired temperature with the dial (here:

"54°F" (12°C)).

The display shows "54°F" (12°C).

Release "Temp" to save your input.

The vacation function is enabled immediately after entry.

You can cancel the vacation function any time by calling it up, as described above, and setting the number of vacation days to "0".

USER NOTE

DHW heating and DHW circulation will be switched off automatically if DHW is heated subject to the heating zones ("program selction heating zone",

Æ Chapter 8.3), and all heating zones are set to vacation mode. You cannot enter a separate DHW vacation function.

USER NOTE

A separate DHW vacation function can be entered if DHW is produced according to a separate time program ("program selction custom DHW",

Æ Chapter 8.3). The DHW circulation pump is switched off automatically during the DHW vacation function.


45


7.17 Interrupting and continuing the vacation function

You may interrupt your vacation program at any time and provide heat according to the set day and night temperatures.

Only the "AUT" LED lights up if a heating zone is in vacation mode.

AUT room temp set

70°F day mode always

AUT room temp set


Interrupting the vacation function

Press "Day mode".

The display shows "day mode always"

You may interrupt the vacation function at any time by pressing "Day mode".

In this case the system heats according to the set room temperature

( Æ Chapter 6.4).

Continuing the vacation function

Press "AUT" to continue the interrupted vacation function.

Interrupting the vacation function

Press "Night mode".

The display shows "night mode alwys"

You may interrupt the vacation function at any time by pressing "Night mode".

In this case the system heats according to the set night temperature

(

Æ Chapter 6.4).

Continuing the vacation function

Press "AUT" to continue the interrupted vacation function.

AUT



7.18 Setting the party function

party mode

+

4 hours

This function only applies to heating zones the MEC2 has been assigned to as a remote control panel ("MEC heatingzones"). All heating zones without MEC2 continue to operate normally.

Enter the length of time the system should only heat to the preset day mode room temperature.

Example:

You have a party and want to heat for the next four hours to the preset room temperature.

Hold down "Day mode", and simultaneously open the cover of the MEC2.

"party mode" is enabled. Hold down "Day mode", and turn the dial until the desired number of hours is displayed (here: "4").

The display shows the party function together with the set number of hours.

Release "Day mode".

The party function starts immediately. After the set time has expired, the heating system returns to automatic heating mode.

If you want to cancel the party function, call up party function as described above and turn the dial to "0".

7.19 Setting the pause function

+

This function only applies to heating zones the MEC2 has been assigned to as a remote control panel ("MEC heatingzones"). All heating zones without MEC2 continue to operate normally.

Enter the length of time the system should heat to the preset room temperature.

Example: you are leaving the house for three hours and want to turn the heat down during your absence.

Hold down "Night mode", and simultaneously open the cover of the MEC2.

The "pause mode" is enabled. Continue to hold down "Night mode", and select the desired (here: "3").

pause mode

3 hours

The display shows the pause function together with the set number of hours.

Release the "Night mode" button.

The pause function starts immediately. After the set time has expired, the heating system returns to automatic heating mode.

If you want to cancel the pause function, call up pause function as described above and turn the dial to "0".


47


7.20 Room temperature matching

USER NOTE

This function is only available if the MEC2 is installed within the living space. If the room temperature shown on the display varies from the actual temperature measured with a thermometer, the display value can be adjusted using

"CALIBRATING MEC".

The factory setting is 0 °F (0 °C). The possible setting range is +9 °F to

-9 °F (+5 °C to -5 °C).

Example:

Displayed room temperature 72 °F (22 °C), actual room temperature

73.5 °F (22.5 °C).

+ z Open flap.

Simultaneously press and then release "Display" and "Temp".

The display shows "CALIBRATING MEC".

CALIBRATING MEC room temperature correction

0.0°F

+

Hold down "Temp" and turn the dial to the desired value (here: "+1.0°F"

(+0.5°C)).



CALIBRATING MEC room temperature correction

+1.0°F


The display shows the corrected temperature (73.5 °F (22.5 °C)).



7.21 Automatic maintenance message

notice service call

If your heating contractor has (with your agreement) enabled the "automatic service call", the maintenance message "notice service call" is displayed at a predetermined time (on a particular date or after so many hours of operation).

z Open flap.

Turn dial.

You will see either "service after date required" or "service after run time required".

z Inform the heating contractor to have the inspection and service done.

service after date required

USER NOTE

The automatic service message remains pending until the heating contractor has reset the message.


49



This chapter is intended to provide more detailed information to those of our customers who would like to familiarize themselves further with the functions of their heating system.

The following pages will explain how to change a standard program, if none of the preset standard programs ( Æ Chapter 7.11) match your lifestyle.

You will learn how to create a new heating program that accurately matches your personal circumstances.

8.1

Modifying the standard program by inserting/deleting set points

8.1.1 Inserting set points

You can interrupt heating phases by inserting set points (details: Weekday/ time/temperature) into an existing heating program.

Example:

The standard "family" program provides constant heating on Fridays from

5:30 am until 11:00 pm (05:30 h until 23:00 h). Insert two new set points if, for example, you do not want to heat on Fridays from 10:00 am to 1:00 pm (10:00 h to 13:00 h).

Your modified program will be saved under the program name "custom" and the number of the heating zone.

50

Fig. 16 Inserting set points to interrupt a heating phase

A "family program"


1 Day mode

2 Night mode


Additional programming options 8 z Select a heating zone (Æ Chapter 7.6).

Example: Heating zone 2 z Select the standard program for the chosen heating zone (Æ Chapter 7.10).

(here: "program selction family")

Release "PROG" to enable the selected standard program (here: "family program").

The display shows the selected standard program.

family program


Turn the dial once counterclockwise, until "new set point" is displayed.

The display shows the blank mask "new set point" for the new set point.

new set point

-------------at ------

+

Hold down "Weekday" and turn the dial to the desired (here: "Friday").

new set point

Friday at ---

+

---- new set point

Friday at 10:00am ----

+


"63°F" (17°C)).



new set point

Friday at 10:00am 63°F

You can select days individually or in blocks:

– Monday – Thursday

– Monday – Friday

– Saturday – Sunday

– Monday – Sunday


Hold "Time" down, and select the desired time with the dial (here: "10:00am"

(10:00)).

"Friday at 10:00am" (10:00) is now set as the new set point.



51


USER NOTE

You cannot freely enter any temperature here. Only the factory-set day and night temperatures are available, which you can, however, modify yourself

( Æ Chapter 6.4).

USER NOTE

Only after all three details (day/time/temperature) have been defined for the new set point will it be automatically saved under "custom program" and the heating zone number (here: "2"). The saving process is not shown on the display. The display shows the blank mask "new set point" for the next set point.

To enter the next set point (e. g. Friday, 1:00 pm (13:00), 70 °F (21 °C)), initially copy the procedure detailed above.

new set point

-------------at ------



Additional programming options 8

8.1.2 Deleting set points

Example:

In the "family program" for heating zone 2, the set point "Monday at 10:00pm"

(22:00) is to be deleted.


family program


Fig. 17 Deleting set point

A "family program"


1 Day mode

2 Night mode z Select a heating zone (Æ Chapter 7.6).


Example: Family program

The first set point (start point): "Monday at 05:30am" (05:30) at "70°F" (21°C) will be displayed.

Turn the dial to the set point you want to delete (here: "10:00pm" (22:00)).

The set point to be deleted is displayed.

family program

Monday at 10:00pm 70°F

+

Simultaneously press and hold "Vacation" and "Display".


53

8 Additional programming options family program delete

Monday 10:00pm

+

The bottom line shows eight blocks that are deleted in one-second intervals from left to right. When all blocks have disappeared, the set point is deleted.

If the buttons are released the delete process is canceled.

Simultaneously release "Vacation" and "Display" to save your input.

The display shows the next set point.

The new program that has been modified by the deletion is saved under "custom program" and the relevant heating zone number (here: "2").

You can call up your new program by pressing "PROG" and turning the dial

(

Æ Chapter 7.10).




8.1.3 Deleting a heating phase

A heating phase consists of two set points – a start and a stop point. If you wish to delete a heating phase, both set points must be deleted.

Example:

In the "daytime program" for heating zone 2, you want to delete the Monday heating phase from 11:30 am to 1:00 pm (11:30 to 13:00 h) to create one single heating pause from 8:00 am to 5:00 pm (08:00 to 17:00 h).


Fig. 18 Deleting a heating phase

A "daytime program"


1 Day mode

2 Night mode

3 Delete


55

8 Additional programming options z Select a heating zone (Æ Chapter 7.6).


Example: "daytime program"

The first set point (start point): "06:00am" (06:00) at "70°F" (21°C) will be displayed. The displayed temperature depends on the set room temperature.

daytime program


Turn the dial to the start point of the heating phase you want to delete (here:

"11:30am" (11:30)).

daytime program


+ data point deleting

Hold down "Time" and turn the dial to the stop point of the heating phase you want to delete (here: "01:00pm" (13:00)).

If you have selected the stop set point of the heating phase you want to delete, the bottom line will show eight blocks that are deleted in one-second intervals from left to right. The heating phase has been deleted when no blocks are left.

The deleting process will be terminated if you release the "Time" button prematurely or turn the dial back. In this case all set points for the heating phase remain active.


The display shows the next set point.

The new program that has been modified by the deletion is saved under "custom program" and the relevant heating zone number (here: "2").


( Æ Chapter 7.10).




8.1.4 Linking heating phases

A heating phase consists of two set points – a start and a stop point. To connect two consecutive heating phases, place the stop point of the first heating phase onto the start point of the next phase.

Example:

Starting from the "daytime program" for heating zone 2, you want to join the

Monday heating phase from 11:30 am to 1:00 pm (11:30 to 13:00 h) to the heating phase 5:00 pm to 10:00 pm (17:00 to 22:00 h). In other words you want to heat continually from 11:30 am until 10:00 pm (11:30 until 22:00 h).


Fig. 19 Connecting two heating phases

A "daytime program"


1 Day mode

2 Night mode

3 Turn from 1:00 pm (13:00) to 5:00 pm (17:00)


57

8 Additional programming options z Select a heating zone (Æ Chapter 7.6).


(here: "daytime program")

The first set point (start point): "Monday at 06:00am" (06:00) at "70°F" (21°C) will be displayed. daytime program


Turn the dial to the stop point of the first heating phase you want to connect with another (here: "01:00pm" (13:00)).

The display shows the stop point to be connected.

daytime program


+ data point connecting custom program 2


Hold down "Time" and turn the dial clockwise, until the start point of the second heating phase, i.e. the next consecutive heating phase, is displayed, which you wish to combine with the first heating phase (here: "05:00pm" (17:00)).

If you have selected the start point of the next consecutive heating phase, the bottom line will show eight blocks, which are deleted in one-second intervals from left to right. When no blocks are left both heating phases have been combined.

The deleting process will be terminated if you release the "Time" button prematurely or turn the dial back. In this case all set points for the heating phase remain active.


The new program that has been modified by the connection process is saved under "custom program" and the heating zone number (here: "2").


( Æ Chapter 7.10).




8.2

Creating a new heating program

You may enter up to 42 set points per week and heating zone to create a new heating program. A single set point comprises three details: weekday, time and temperature.

The newly created program will be saved under "custom program" and the relevant heating zone number.

Example:

Monday – Friday, from 5:00 am (05:00 h) 70 °F (21 °C), from 9:00 pm (21:00 h) 63 °F (17 °C)

Saturday – Sunday, from 9:30 am (09:30 h) 70 °F (21 °C), from 11:30 pm (23:30 h) 63 °F (17 °C) new set point

-------------at ------

Fig. 20 New heating program

A New heating program "custom program 2"

Monday – Friday

B Saturday – Sunday

1 Day mode

2 Night mode z Select a heating zone (Æ Chapter 7.6).

Example: Heating zone 2 z Select the standard program "program selction new" for this heating zone

( Æ Chapter 7.10).

The display shows the blank mask "new set point".


59


+

Entering the first set point (Monday – Friday, 5:00 am (05:00 h) 70 °F

(21 °C))

You can select days individually or in blocks:

– Monday – Thursday

– Monday – Friday

– Saturday – Sunday

– Monday – Sunday

Hold down "Weekday" and select the desired day or block with the dial (here:

"Mon - Fri").


new set point

Mon - Fri at ------

+

Hold "Time" down, and select the desired time with the dial (here: "05:00am"

(05:00)).

The display shows the new set point.


new set point

Mon - Fri at 05:00am ----

+


"70°F" (21°C)).

new set point

Mon - Fri at 05:00am 70°F

You cannot freely enter any temperature here. Only the factory-set day and night temperatures are available, which you can, however, modify yourself

( Æ Chapter 6.4).



new set point

-------------at ------


Only after all three details (day/time/temperature) have been set for the new set point will it be automatically saved under "custom program" and the heating zone number (here: "2"). The saving process is not shown on the display. The display shows the blank mask "new set point" for the next set point.

z Enter the second set point (Monday – Friday, 9:00 pm (21:00 h),

63 °F (17 °C)).

z Enter the third set point (Saturday – Sunday, 9:30 am (09:30 h),

70 °F (21 °C)).

z Enter the fourth set point (Saturday – Sunday, 11:30 pm (23:30 h),

63 °F (17 °C)).

To enter the second to fourth set points, you only need to repeat the previous steps.

Only after all set points have been correctly entered, press "Back" to return to the permanent display.

Your heating program will now operate according to your "custom program". You can call up your new "custom program" by pressing "PROG" and turning the dial.


61


8.3

Creating a new DHW program

You may operate DHW heating either according to the factory settings "program selction heating zone" or according to your own new switching program

"program selction custom DHW".

USER NOTE

With the factory setting "program selction heating zone", DHW is heated

30 minutes prior to the first set point of all heating zones associated with this control panel, and ends when the last heating zone is switched off.

If DHW is to be heated independently of the heating zones, you can enter your own new DHW program as follows:

Example:

On all weekdays DHW should be heated from 6:30 am until 9:00 am (06:30 h until 09:00 h).


(here: "DHW") z Select a program for the heating zone "DHW" (Æ Chapter 7.10).

(here: "program selction new")


new set point

-------------at ------ z Enter the set points (Æ Chapter 8.2).

USER NOTE

Only after all three details (day/time/temperature) have been defined for the new set point will it be automatically saved under "custom program DHW", and the heating zone selection "DHW". The saving process is not shown on the display. The display shows the blank mask "new set point" for the next set point. Repeat this process for all desired set points.

DHW heating will now operate according to your "custom program DHW". You can call up your new "custom program DHW" by pressing "PROG" and turning the dial ( Æ Chapter 7.6).



8.4

Creating a new DHW recirculation pump program

You may operate the DHW recirculation pump either according to the factory settings "program selction heating zone" or according to your own new switching program "program selction custom CR" (CR: recirculation pump).

USER NOTE

With the factory setting "program selction heating zone", the DHW recirculation pump starts automatically 30 minutes prior to the first set point of all heating zones associated with this control panel, and ends when the last heating zone is switched off.

If your recirculation pump should work independently of the heating zones, you can enter your own new DHW recirculation pump program as follows:

Example:

The DHW circulation pump is to run on all weekdays from 6:30 am to 9:00 am

(06:30 h to 09:00 h).


(here: "recirculation") z Select a program for the heating zone "recirculation" (Æ Chapter 7.10).

(here: "program selction new")


new set point

-------------at ------ z Enter the set points (Æ Chapter 8.2).

USER NOTE

Only after all three details (day/time/temperature) have been defined for the new set point will it be automatically saved under "custom program CR" and the heating zone number "recirculation". The saving process is not shown on the display. The display shows the blank mask "new set point" for the next set point. Repeat this process for all desired set points.

Your DHW recirculation pump will now operate according to your "custom program CR". You can call up your new "custom program CR" by pressing

"PROG" and turning the dial.


63



All modules that are installed or can be installed on the

Logamatic 4321 and 4322 controls are listed below.

Logamatic


4321

O

4322

X

CM431 controller module

O O

Modules

ZM434 central module

Burner + boiler circuit functions

FM441 function module

1 heating zone + 1 DHW consumer


2 heating zones


Solar circuit


LAP/LSP (charging system)


Centralized alarm message


Strategy module

Tab. 2 Standard equipment level and optional modules

1)

May only be connected to control panel 1 (address 0 or 1).

O = basic equipment

X = optional extra

Along with the ZM434 central module, which is part of the standard equipment of the Logamatic 4321/22 control panels, the most commonly used function modules, i.e. FM441 and FM442 function modules, are described on the following pages.

O

X

X

X

X

X

X

1)

O

X

X

X

X

X

X

1)

The MEC2 preset menus in these operating instructions relate to these modules.

All other modules are explained in separate technical module documentation.


Modules and their functions 9

9.1

ZM434 burner and boiler circuit module (standard equipment)

The ZM434 module is part of the standard equipment level of the Logamatic 4321 and 4322 control panels.

The manual switches on the module are only provided for service and maintenance functions.

MEC2 shows a message to this effect and the

0

fault display lights.

USER NOTE

Do not use the manual switches to shut off the installation for temporary absence.

Use the vacation function for this purpose

( Æ Chapter 7.16).

The control functions continue to operate in manual mode.

Burner function

Manual burner switch ]

USER NOTE

The manual switch should normally be set to "AUT".

The 0, manual and max I + II positions are special settings reserved for use by technicians in case of faults.

The burner can be controlled directly with the manual switch. The control continues to operate.

Fig. 21 ZM434

Display

0

General fault, e.g. on-site fault, sensor fault, external faults, wiring faults, internal module faults, manual operation.

The fault messages are shown as plain text in the

MEC2 remote control.

LEDs for burner functions

Display

9

Burner fault

Display

Display

Display

A Burner operational

U

Modulation output is increased/ stage 2 operational V

Modulation output is reduced

LEDs for boiler circuit functions

Display

1

Boiler in summer mode

Display

Display

Display

8

Boiler pump operating

U

Mixing valve opens towards boiler

V

Mixing valve opens towards heating zone


65


3

:

AUT:

0:

In the case of single-stage and two-stage burning only the first stage is assigned for basic load. For modulating burners, the burner output can be variably increased using

5

and reduced using

6

.

The burner is operating in automatic mode.

The burner is switched OFF. mode is set to

4

.

max I+II: The burner is operated continuously at maximum output.

Boiler circuit function

Manual switch for boiler loop

B

USER NOTE


The 0 and manual operation positions are special settings that should only be made by technicians.

3

: If a boiler pump is installed, it is switched on.

The boiler loop actuator can be operated manually.

AUT: The boiler loop is operating in automatic

0: mode.

If a boiler pump is installed, it is switched off.

The boiler loop actuator can be operated manually.

Q

: "Flue gas test" button

(explanation Æ Chapter 10).

Current functions are indicated by LEDs.



9.2

FM441 function module (accessory)

The FM441 module controls one heating zone and one

DHW consumer.


If the manual switches are not set to automatic, a corresponding message appears on the MEC2 remote control and the fault indicator lights up.

USER NOTE



( Æ Chapter 7.16).

1

Fig. 22 FM441 function module

1 Heating zone

2 DHW

Display General fault, e.g. on-site fault, sensor fault, external faults, wiring fault, internal module fault, manual mode.

The fault messages appear as plain text on the


LEDs for the functions

Display

Display

"Mixing valve opening" (hotter)

"Mixing valve closing" (colder)

Display

Display

Display

Display

Display

Display

Heating zone in summer mode

DHW in night mode below the set temperature

Heating pump in operation

- L Tank primary pump in operation

- Z Recirculation pump in operation

Thermal disinfection active

2


67


Heating zone and DHW consumer

Heating zone manual switch (

Æ Fig 23, [1]) and DHW

(

Æ Fig. 23, [2]): for heating zone: for DHW supply:

USER NOTE


Positions 0 and

3

(manual) are special settings reserved for contractors only.

3

: The heating pump or tank primary pump is switched on.

The mixing valve is switched to zero volt and can be manually operated.

The DHW recirculation pump is switched off.

AUT:

The heating zone or DHW consumer operates in automatic mode.

0: The heating pump or tank primary pump as well as the DHW recirculation pump are switched off.

The mixing valve is switched to zero volt.

The control functions continue to operate.


1


1 Manual heating zone switch

2 DHW manual switch

2



9.3

FM442 function module (accessory)

The FM442 module controls two independent heating zones with mixing valve.

Several FM442 modules can be used in your control panel.


If the manual switches are not set to automatic, a corresponding message appears on the MEC2 remote control, and the fault indicator lights up.

USER NOTE



( Æ Chapter 7.16).

Heating zone function

Manual heating zone switch zone 1 or 2

e.g. for heating

USER NOTE


Positions 0 and

3

(manual mode) are special settings reserved for contractors only.

3

:

The heating pump is switched on.

The mixing valve is switched to zero volt and can be manually operated.

AUT:

0:

The heating zone is operating in automatic mode.

The heating pump is switched off.

The mixing valve is switched to zero volt.

The control functions continue to operate.


1


1 Heating zone x

2 Heating zone y

Display General fault, e.g. on-site fault, sensor fault, external faults, wiring fault, internal module fault, manual mode.

The fault messages appear as plain text on the


LEDs for the functions

Display "Mixing valve opening" (hotter)

Display "Mixing valve closing" (colder)

Display

Display

Heating zone in summer mode

Heating pump in operation

2


69



WARNING!

RISK OF SCALDING

During the flue gas test, the hot water can reach a temperature in excess of

140 °F (60 ° C). Persons may be scalded at the taps.

z Use only mixed hot water during or after an emissions test. Note that when single-lever faucets are in their usual position, the water drawn may be too hot.

z Never turn on hot water only at faucets with two handles.

USER NOTE z Note the national regulations for limiting the emissions of the heating system.

z Have an emission test done annually.

The flue gas test may activated at the boiler ( Æ technical boiler documentation).

Fig. 25 ZM434

1 ZM434 module testing flue gas boiler temp

167°F

"Flue gas test" button

Q

on the ZM434 module

The control must be switched on.

z Hold down "Flue gas test" for several seconds to start the flue gas test.

gas test, the displays

0

for faults and

1

for summer mode will flash alternately. At the end of the test the control automatically switches to the prior mode.

z Press "Flue gas test"

Q

again to terminate the flue gas test.

During the flue gas test the MEC2 will show the display on the left.


Correcting faults and troubleshooting 11


Have all faults remedied by your heating contractor immediately.

All system faults are displayed on the MEC2 remote control.

Report the fault by telephone to your heating contractor.

Where necessary, set the module switches according to the instructions in Chapter 12.

Depending on the modules (Chapter 9) your control panel is equipped with, the following faults may be reported:

– Burner fault boiler

– Boiler temperature sensor

– Outdoor-temperature sensor

– Heating zone supply sensor heating zone 1 – 8 (if installed)

– DHW temperature sensor

– Boiler is cold

– DHW is cold

– DHW warning

– Remote control no communication with heating zone 1 – 8 (if installed)

– Disinfection

– Additional temp. sensor

– Heating zone 1–8 (if installed) pump fault

– DHW pump fault

– DHW inert anode fault

– Safety fault

– Bus system no connection

– Multiple address set

– External boiler fault

– Emission sensor fault

– Flue gas temperature exceeded

– Address conflict slot 1 – 4 (if installed)

– Incorrect module slot 1 – 4 (if installed)

– Unknown module slot 1 – 4 (if installed)

– Function module has no connection

– No master control panel installed

– Heating zone 1 – 8 (if installed) in manual mode

– DHW in manual mode

– Boiler loop in manual mode

– Burner in manual mode


71


11.1 Simple troubleshooting

If no fault messages are displayed on the control panel in spite of cool rooms or cool DHW, there may be an incorrect setting.

Observation Possible cause(s) Action

– ON/OFF switch set to "OFF".

– ON/OFF switch set to "ON".

Control panel remains dark or does not function

MEC2 display dark

– No power supply.

– Check mains electrical circuit breaker.

– Heating system emergency shut-off switch set to "ON".

– Install MEC2 correctly.

– MEC2 incorrectly plugged in (contact problems).

– Actual room temperature for the respective heating zone is incorrectly displayed.

– Check the heating zone assignment.

– Control panel operates in setback mode.

– Check time and heating program, and modify if required.

– Set room temperature too low.

– Correct set room temperature.

Room cool

– DHW supply runs for too long.

– Check DHW heating.

– Heat sources deliver insufficient heating energy or are shut down.

– Room temperature sensor is incorrectly placed.

– Check heat sources.

– Sensor adjustment.

– DHW is set to the wrong temperature.

– Correct the DHW setting.

DHW cool

DHW cool

(if DHW is heated by external heat source)

Tab. 3 Simple troubleshooting

– Switching program is incorrectly set up.

– Re-program the switching program.

– External heat sources supply insufficient heating energy.

– Check heat sources.


Correcting faults and troubleshooting 11

11.2 Troubleshooting

Fault

Burner fault

Boiler remains cold

DHW temperature does not rise

Safety chain has tripped

Remote control fault

Effect

Heating remains cold.

Heating remains cold.

The control operates with the last values set at the remote control.

Remedy

– Service burner as described in the boiler or burner documentation.

– Check that the temperature control is set to AUT.

– Check that sufficient fuel is available.

Heating remains cold in some cases but not always.

If not successful:

– Set burner emergency switch on control to manual mode.

– Set the burner manual switch on the ZM432 module to max/I+II, and set the boiler water temperature using the thermostat.

– Notify heating contractor.

– Check that the temperature control is set to AUT.

DHW remains cold in some cases but not always.


– Set DHW and heating zone manual switch on the

FM441 module to manual mode.


– Check that the boiler is completely full of water.

Check whether the boiler is under at least 14.5 psi

(1.0 bar) pressure.

If this is the case:

– Unlock the safety temperature switch by unscrewing the cap nut and pressing the reset button under it.




Boiler sensor fault;

Outdoor temperature sensor fault;

Flow sensor fault

The heater heats at higher temperatures if necessary and in order to ensure a comfortable temperature.


Inform the heating contractor which temperature sensor is defective.

DHW sensor fault

Heating zone X in manual mode;

DHW in manual mode;

Boiler loop in manual mode;

Burner in manual mode

If the DHW sensor is defective, water is not heated for safety reasons.

Pumps, actuators etc. are manually switched depending in the switch positions.

The control functions continue operating during manual mode but do not affect the system.


– The switches are set to manual mode (for servicing or to correct errors).

Return the manual switches to AUT when faults have been remedied.

Tab. 4 Troubleshooting


73



WARNING!

RISK OF LIFE due to electric shock!

z Never open the control panel.

z In an emergency, switch off the control panel (e.g. with the heating system emergency shut-off switch) or isolate the heating system from the mains supply by disengaging the heating system circuit breaker.

z Arrange for your heating contractor to rectify any heating system faults immediately.

SYSTEM DAMAGE through the system overheating!

CAUTION!

If the temperature is set incorrectly, a radiant floor heating system could overheat.

z If an radiant floor heating system is installed: Before operating your heating system manually, check the temperature settings of the temperature limiter on the boiler.

Manual switches are provided for manual mode on the control panel and the modules.

Each pump is activated in position

3

. The mixing valve remains disconnected and can be adjusted by hand.

12.1 Emergency operation

If the electronics fail, the control panel can operate in emergency mode. In emergency mode, all pumps continue to run and the mixing valves are volt-free. They can be set manually. In such cases, notify your heating contractor.


12.2 Heating mode with manual switch

Manual switches for emergency operation are installed in the control and the modules. The assigned pump is started in position

3

. The mixing valve remains disconnected and must be adjusted by hand.

Before making any settings for manual mode check the settings on the various modules for any incorrect settings.

If there is a fault in the controller, you can continue to operate your heating system manually on a temporary basis.

.

Operation in the event of a fault 12

Fig. 26 Heating mode with manual switch

1 Manual module switch

2 Boiler water temperature controller

3 Burner emergency operation switch

4 On/Off switch z To safeguard DHW heating in the event of a fault, set the manual module switches (

Æ Fig 26) to

3

.

z Set the boiler water thermostat (Æ Fig 26) to

140 °F – 194 °F (60 °C – 90 °C), for DHW heating to

140 °F (60 °C).

z Set burner emergency switch to

W

. Burner stage 1 is always directly actuated. Burner stage 2 must be adjusted with the manual switch on the module.

z Set the control panel ON/OFF switch to

R

.


75


Fault

Room heating failure

Heating zones failure

DHW failure

Heating zones operating normally

Boiler operation failure

ON/OFF switch on

Logamatic 4321

Settings for an emergency operation

Switch

Manual mode boiler zone

ZM434 module

R

AUT

R

AUT

R 3

Switch

DHW manual mode

Module FM441

AUT

3

AUT

Boiler water thermostat on the

Logamatic 4321

140 °F – 194 °F

(60 °C – 90 °C)

Manual mode switch heating zone

FM441/FM442 module

3

140 °F (60 °C)

194 °F (90 °C)

AUT

AUT

Tab. 5 Settings for an emergency operation

Disconnect heating zone mixing valve manually and set to "Open" or "Closed" (lock to prevent movement) to reach the desired room temperature. The heating zone mixing valve must not be completely closed, otherwise the DHW in the heating system may freeze.

In case of fault inform the heating contractor immediately. He will guarantee professional service. It is helpful for the contractor if you can provide detailed information about the fault.


Setup log 13

13 Setup log

Operating values

Program selection

DHW

Warm weather shut down

(WWSD) temperature

Day room temperature

Night room temperature

Vacation room temperature

Thermal disinfection

Input range family early morning evening morning afternoon midday singles

Factory setting family seniors new

86 °F – 140 °F (30 °C – 60 °C) 140 °F (60 °C)

50 °F – 86 °F (10 °C – 30 °C) summer mode always winter mode always

63 °F (17 °C)

52 °F – 86 °F (11 °C – 30 °C) 70 °F (21 °C)

36 °F – 84 °F (2 °C – 29 °C) 63 °F (17 °C)

50 °F – 86 °F (10 °C – 30 °C) 63 °F (17 °C) yes/no no

Heating zone assignment

Your heating contractor will, as part of the commissioning process, assign the individual heating zones of your heating system, e.g. heating zone 1 =

"l.h. side of the first floor".

Assignment Heating zone heating zone 1 heating zone 2 heating zone 3 heating zone 4 heating zone 5 heating zone 6 heating zone 7 heating zone 8

Selection


77

14 Index

14 Index

A

Adjusted outdoor temperature . . . . . . . . . . . 40

Automatic . . . . . . . . . . . . . . . . . . . . . . 49

Automatic mode . . . . . . . . . . . . . . . .19

,

20

B

Boiler . . . . . . . . . . . . . . . . . . . . . . . . 5

Boiler circuit function . . . . . . . . . . . . . . . . 66

Burner functions . . . . . . . . . . . . . . . . . . 65

C

D

Central module . . . . . . . . . . . . . . . . . . . 16

Controls . . . . . . . . . . . . . . . . . . . . . . . 13

Day mode . . . . . . . . . . . . . . . . . . 9

,

19

,

21

DHW storage tank . . . . . . . . . . . . . . . . . 5

DHW temperature . . . . . . . . . . . . . . . . . 25

Drawer modules . . . . . . . . . . . . . . . . . . 64

E

Emergency operation . . . . . . . . . . . . . . . . 74

F

Factory-adjusted setting . . . . . . . . . . . .62

,

77

Factory-set DHW temperature . . . . . . . . . . . 24

Fault displays . . . . . . . . . . . . . . . . . . . . 71

Fault message "Setting not possible" . . . . . . . . 33

Fault message "Timer not possible" . . . . . . . . 33

Fault messages . . . . . . . . . . . . . . . . . . . 72

Faults . . . . . . . . . . . . . . . . . . . . . . . . 71

Flue gas test . . . . . . . . . . . . . . . . . . . . 70

FM441 . . . . . . . . . . . . . . . . . . . . . . . 67

FM442 . . . . . . . . . . . . . . . . . . . . . . . 69

H

Heating control . . . . . . . . . . . . . . . . . . . 5

Heating domestic hot water . . . . . . . . . . . . 24

Heating phase . . . . . . . . . . . . . . . . . . . 56

Heating program . . . . . . . . . . . . . 26

,

34

,

36

Heating system emergency shut-off switch . . . . 16

Heating zone . . . . . . . . . . . . . . . 30

,

31

,

67

Heating zone and DHW consumer . . . . . . . . . 68

Heating zones – assignment . . . . . . . . . . . . 77

I

Instantaneous water heater . . . . . . . . . . . . 5

K

Keypad . . . . . . . . . . . . . . . . . . . . . . . 14

L

Light emitting diodes . . . . . . . . . . . . . .67

,

69

M

Manual mode . . . . . . . . . . . . . . . . . .19

,

21

Manual operation . . . . . . . . . . . . . . . .19

,

21

Matching the room temperature . . . . . . . . . . 48

Modules . . . . . . . . . . . . . . . . . . . . . . 64

Modules installed . . . . . . . . . . . . . . . . . . 13

N

Night mode . . . . . . . . . . . . . . . . . 9

,

19

,

21

O

Operating values . . . . . . . . . . . . . . . 27

,

77

Operation with faults . . . . . . . . . . . . . . . 74

P

Permanent display . . . . . . . . . . . . . . . . 18

Piping . . . . . . . . . . . . . . . . . . . . . . . . 5

R

Radiant floor heating . . . . . . . . . . . . . . . 74

Radiator . . . . . . . . . . . . . . . . . . . . . . . 5

Radiator valve . . . . . . . . . . . . . . . . . . . . 6

Recirculation pump . . . . . . . . . . . . . . . . 43

S

Set date . . . . . . . . . . . . . . . . . . . . . . 29

Set point . . . . . . . . . . . . . . . . . . . . . 38

Set the time . . . . . . . . . . . . . . . . . . . . 29

Setting summer mode . . . . . . . . . . . . . . 41

Setting the desired room temperature . . . . 17

,

22

Setting winter mode . . . . . . . . . . . . . . . . 41

Setup log . . . . . . . . . . . . . . . . . . . . . 77

Standard program . . . . . . . . . . . . . . . . . 36

Standard settings . . . . . . . . . . . . . . . . . 28

T

Thermometer . . . . . . . . . . . . . . . . . . . 48

Thermostat . . . . . . . . . . . . . . . . . . . . . 6

Timer . . . . . . . . . . . . . . . . . . . . . . . 34

Troubleshooting . . . . . . . . . . . . . . . . . . 73

V

Vacation function . . . . . . . . . . . . . . . . . 44

Vacation mode . . . . . . . . . . . . . . . . 44

,

46


Notes


79

Buderus Logamatic 4322 Operating Instructions Manual

Assistant Bot

Operating Instructions

Control panel

For the user

Please read carefully before use

1 Introduction

2 What you should know about your heating system

3 Tips on energy-efficient heating

4 Safety

4.1

About this manual

4.2

Designated use

4.3

Standards, regulations and directives

4.4

Key to symbols

4.5

Please observe these notes

4.6

Cleaning control

4.7

Disposal

5 Controls and MEC2 remote control

5.1

Controls on the basic unit

5.2

MEC2 remote control

5.3

Switching on the control

5.4

Switching off the control panel

6 Basic functions

6.1

Simple operation

6.2

Permanent display

6.3

Select operating mode

6.4

Set the room temperature

6.5

Heating domestic hot water

7 Extended functions

7.1

Buttons for extended functions

7.2

Controlling the extended functions

7.3

Displaying operating values

7.4

Changing the permanent display

7.5

Setting the date and time

7.6

Selecting a heating zone

7.7

Adjusting the room temperature for another heating zone

7.8

Heating zones with MEC2 remote control

7.9

Selecting and modifying a heating program

7.10 Selecting a standard program

7.11 Summary of standard programs

7.12 Modifying the standard program by moving set points

7.13 Setting the warm weather shut down (WWSD) temperature

7.14 Setting the DHW operating mode

7.15 Setting the operating mode for DHW recirculation

7.16 Set the vacation function

7.17 Interrupting and continuing the vacation function

7.18 Setting the party function

7.19 Setting the pause function

7.20 Room temperature matching

7.21 Automatic maintenance message

8 Additional programming options

8.1

Modifying the standard program by inserting/deleting set points

8.2

Creating a new heating program