Buderus FM443 User manual

For the user
Please read carefully
before use
Operating Instructions Function module
FM443
Solar Module
6 720 618 607 - 11/2008 US/CA

Contents
FM443 Solar Module - Technical specifications are subject to change without prior notice.
2
1Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Standards, regulations and directives . . . . . . . . . . . . . . . . . 4
1.4 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5 Please observe these notes. . . . . . . . . . . . . . . . . . . . . . . . 5
1.6 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Positions of manual switches . . . . . . . . . . . . . . . . . . . . . . 8
2.1.1 Manual switch (solar circuit 1) . . . . . . . . . . . . . . . . . . . . . 8
2.1.2 Manual switch (solar circuit selection) . . . . . . . . . . . . . . . . . 9
3 The functions of the FM443 . . . . . . . . . . . . . . . . . . . . . . . .10
3.1 Changing the operating mode . . . . . . . . . . . . . . . . . . . . . .10
3.2 Querying operating characteristics . . . . . . . . . . . . . . . . . . . 12
4 Correcting faults and troubleshooting . . . . . . . . . . . . . . . .14

FM443 Function Module - Technical specifications are subject to change without prior notice. 3
Safety 1
1Safety
1.1 About this manual
This section contains general safety instructions that you must
observe when operating the FM443 function module.
The other sections of the operating instructions contain additional
safety instructions that must also be observed. Read the safety
instructions carefully before carrying out the activities described
below.
If the safety instructions are not observed, serious or even fatal
personal injury and damage to property and the environment may
be caused.
1.2 Designated use
The FM443 function module can be installed in the controls of the
Logamatic 4000 control system.

FM443 Function Module - Technical specifications are subject to change without prior notice.
4
Safety1
1.3 Standards, regulations and directives
1.4 Key to symbols
Two levels of danger are identified and signified by the following
terms:
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.
WARNING!
RISK OF LIFE
Identifies possible dangers emanating from a product, which could
cause serious injury or death if appropriate care is not taken.
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.

FM443 Function Module - Technical specifications are subject to change without prior notice. 5
Safety 1
1.5 Please observe these notes
The FM443 function module has been designed and built in
accordance with currently recognized standards and safety
requirements.
However, damage resulting from improper operation cannot be
prevented completely.
Read these operating instructions carefully before operating the
FM443 function module.
1.6 Disposal
zElectronic components do not belong in household waste.
Dispose of defunct modules correctly through an authorized
disposal site.
WARNING!
RISK OF LIFE
due to electric shock!
zEnsure that all electrical work is carried out by a licensed
contractor.
CAUTION!
RISK OF INJURY/SYSTEM DAMAGE
due to operator error!
Operator errors can cause injury and damage to property.
zEnsure that children never operate the appliance
unsupervised or play with it.
zEnsure that only personnel instructed to operate the appliance
correctly have access to it.

FM443 Function Module - Technical specifications are subject to change without prior notice.
6
Product description2
2 Product description
The FM443 function module has been designed exclusively for use
with the Logamatic 4000 modular control system.
The FM443 function module can be used to control a solar system
with one or two solar consumers (e.g. storage tanks).
The following functions can be used after installation of the FM443
function module:
– Changing solar control operating mode
– Querying operating characteristics of solar consumer "1" or "2",
the heat meter and the collector field
– Scanning the yield over recent days, weeks and years

FM443 Function Module - Technical specifications are subject to change without prior notice. 7
Product description 2
Fig. 1 Front panel of FM443 function module
1Manual switch (solar circuit 1)
2LED "Three-way valve" in case of buffer bypass circuit (central heating
backup via storage tank)
3LED "Three-way valve" in case of buffer bypass circuit (no central
heating backup via storage tank)
4Solar circuit pump 1*
5Maximum temperature storage tank 1
6"Module Fault" LED (red) – general module fault
7Maximum temperature of collector
8Secondary solar circuit pump 2 or transfer pump enabled*
9Solar circuit pump 2 or 3-way valve 2 in solar circuit 2 position*
10 3-way switching valve in solar circuit 1 position
11 Manual switch (solar circuit selection)
* LED constantly ON: Pump running (100 %)
LED "flickers": Pump modulates
LED OFF: Pump OFF
3
1
7
4
5
8
9
11
10
6
2

FM443 Function Module - Technical specifications are subject to change without prior notice.
8
Product description2
2.1 Positions of manual switches
The various positions of the manual switch have different effects
on the solar circuit or the two solar consumers.
2.1.1 Manual switch (solar circuit 1)
Tab. 1 Manual switch positions
CAUTION!
SYSTEM DAMAGE
Incorrect use of switch positions 0 and 3may cause damage to
the solar system or even destroy individual components of the
system.
zEnsure that the switch is always in the "AUT" position.
USER NOTE
The manual switches 3should normally be in the "AUT" position.
The 0 and 3positions are special settings that should be used by
technicians only.
Position Effect
Solar circuit 1 (solar circuit pump 1) and the bypass
(3-way valve) are switched off.
Solar circuit 1 and the bypass are in automatic mode
– this is the standard setting.
Manual mode is activated.
Solar circuit pump 1 is switched on. The bypass is
not being controlled.

FM443 Function Module - Technical specifications are subject to change without prior notice. 9
Product description 2
2.1.2 Manual switch (solar circuit selection)
Position Effect
The selection of the solar circuit is switched off.
The FM443 (solar) function module is in automatic
mode – this is the standard setting.
If the corresponding solar yield is available, only
solar consumer "2" (solar circuit 2) is loaded.
The automatic switchover is disabled.
If the corresponding solar yield is available, only
solar consumer "1" (solar circuit 1) is loaded.
The automatic switchover is disabled.
Tab. 2 Manual switch positions
USER NOTE
If the manual switch is not in automatic mode, a message to that
effect appears on the MEC2 user interface, and the "Module fault"
LED on the module illuminates.
Notify your heating contractor.

FM443 Function Module - Technical specifications are subject to change without prior notice.
10
The functions of the FM4433
3 The functions of the FM443
3.1 Changing the operating mode
You can change the operating mode of the solar control. The
operating modes are as follows:
– Manual ON ("day mode" button)
– Manual OFF ("night mode" button)
– Automatic operation ("AUT" button)
Open the flap of the MEC2 user interface.
Press and hold the "heating zone" button.
Turn the dial until "select heat zone – solar" appears on the display.
Release the "heating zone" button.
USER NOTE
With the "Manual ON" operating mode ("day mode" button), the
collector protection function is ensured, that is, the pump will not
start up if the collector temperature is above the threshold value.
USER NOTE
When the flap on the MEC2 user interface is closed, it will
generally indicate to which heating zone the MEC2 user interface
is assigned. If the MEC2 user interface is not assigned to any
heating zone, then the lowest installed heating zone is always
indicated.
For more information see the technical documentation for your
control.

FM443 Function Module - Technical specifications are subject to change without prior notice. 11
The functions of the FM443 3
Different operating modes
Press manual ON ("day mode" button) to set the solar control unit
to "permanent on."
Press the "AUT" button to set the solar control to automatic.
Press manual OFF ("night mode" button) to switch off the solar
control unit.
Manual ON
This operating mode has no control function, but it switches the
solar system off if the collector field or the tank(s) have exceeded
the maximum allowable temperature.
If this operating mode is activated:
– Hot fluid in the solar system (e.g. glycol water) can flow from
the storage tank to the collector field.
– Cold fluid (< 32°F (0°C)) in the solar system (e.g. glycol water)
can flow from the collector to the storage tank – the storage
tank temperature falls, with the result, for example, that the
backup heating is activated.
Input range Factory setting
Operating mode Automatic
OFF
ON
Automatic
USER NOTE
The "Manual ON" mode returns automatically to automatic mode
after 30 minutes.

FM443 Function Module - Technical specifications are subject to change without prior notice.
12
The functions of the FM4433
3.2 Querying operating characteristics
You can view the performance of your solar thermal system or of
the two solar consumers on the MEC2 user interface display.
The following operating values can be viewed:
– Collector temperature
– Solar tank 1 operating mode
– Solar tank 1 temperature
– Solar tank 1 hours run
– Solar tank 1 heat yield
– Solar tank 2 operating mode*
– Solar tank 2 temperature*
– Solar tank 2 hours run*
– Solar tank 2 heat yield*
– Daily yield: Current day
Yesterday
2 days ago
– Weekly yield: Current day
1 week ago
2 weeks ago
– Annual yield
* Only if available and selected on the MEC2 user interface.

FM443 Function Module - Technical specifications are subject to change without prior notice. 13
The functions of the FM443 3
Open the flap of the MEC2 user interface.
Turn the dial until the desired values are shown.
USER NOTE
You can only display the solar tank heat yield if the heat meter set
(accessory) is installed in the solar circuit and connected to the
FM443 function module.

FM443 Function Module - Technical specifications are subject to change without prior notice.
14
Correcting faults and troubleshooting4
4 Correcting faults and troubleshooting
Faults in the solar circuit and the maximum of two solar consumers
are shown on the display of the MEC2 user interface.
WARNING!
RISK OF LIFE
due to electric shock!
zNever open the controls.
zIn an emergency, switch off the controls (e.g. with the heating
system emergency shutoff switch) or isolate the heating
system from the power supply by disengaging the circuit
breaker. Take measures to prevent accidental reconnection.
zArrange for your heating contractor to rectify any heating
system faults immediately.
USER NOTE
The fault messages remain pending until the faults have been
corrected.

FM443 Function Module - Technical specifications are subject to change without prior notice. 15
Correcting faults and troubleshooting 4
Fault display
Open the flap of the MEC2 user interface if a fault appears on the
display on your MEC2 user interface.
If multiple faults are pending, turn the dial until you see the faults
that affect the solar circuit or one of the two solar consumers.
The following fault messages may be shown:
– Collector sensor
– Bypass buffer sensor
– Bypass return sensor
– Heat meter supply sensor
– Heat meter return sensor
– Bottom storage tank 1
– Bottom storage tank 2
– Flow rate
– Differential setting
USER NOTE
Notify your heating contractor if faults occur on the FM443 function
module and are displayed on your MEC2 user interface.