Buderus Logamatic SC40 Manuale utente
For the Owner
Please read carefully
before operation.
Operating instructions Solar thermal
controller
7747006071-00.1 SD
Solar thermal system with
Logamatic SC40
7 747 017 474 GB (2007/08) OSW
Contents
Logamatic SC40 - Specifications subject to change without notice.
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Contents
1 Safety instructions and explanation of symbols 3
1.1 General safety instructions 3
1.2 Symbols 4
2 Details of the product 5
2.1 EU Declaration of Conformity 5
2.2 Product description 5
3Operation 7
3.1 Elements of the solar pumping station 7
3.2 controller controls 8
3.3 Viewing system data 9
4Faults 11
4.1 Faults indicated on the display 11
4.2 Faults not indicated on the display 12
5 Notes for the user 13
5.1 Why is regular maintenance important? 13
5.2 Important notes on heat transfer fluids 13
5.3 Checking the solar thermal system 13
5.4 Checking operating pressure, with possible re-adjustment 14
5.5 Cleaning the collectors 14
6 User's log 15
Logamatic SC40 - Specifications subject to change without notice. 3
Safety instructions and explanation of symbols 1
1 Safety instructions and explanation of symbols
1.1 General safety instructions
About this manual
This manual contains important information about the safe and correct installation and operation of
the solar thermal system.
VAsk your heating engineer to provide you with all the technical documentation relating to the solar
thermal system.
VRead this manual carefully and keep it for future reference.
VAlways observe the safety instructions to prevent injury and damage to property.
Intended use
The temperature difference controller (referred to from now on as the "controller") may only be used
for operating solar thermal systems under the permissible ambient conditions (0 - 50 °C).
The controller must not be used outdoors, in damp rooms or in rooms where easily flammable gas
mixtures could form.
VOnly operate the solar thermal system as intended and when the system is in proper working
order.
VIn the event of danger, disconnect the controller from the mains power supply by means of the
isolating device (e.g. mains plug).
VAny work that requires the controller to be opened may only be carried out by a qualified electri-
cian (risk of fatal electric shock).
Domestic hot water temperature
If the cylinder maximum temperature is set higher than 60 °C, there is a risk of scalding at the hot
water points.
VAsk your heating engineer what the maximum hot water temperature has been set to.
VOnly draw hot water from mixer units.
Disposal
VDispose of packaging in an environmentally responsible manner.
VWhen replacing components, dispose of the old parts in an environmentally responsible manner.
Safety instructions and explanation of symbols
Logamatic SC40 - Specifications subject to change without notice.
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1
1.2 Symbols
Signal words indicate the seriousness of the hazard in terms of the consequences of not following
the safety instructions.
–Caution indicates that minor damage to property could result.
–Warning indicates that minor personal injury or serious damage to property could result.
–Danger indicates that serious personal injury could result. In particularly serious cases, lives
could be at risk.
Notes contain important information in cases where there is no risk of personal injury or damage to
property.
Safety instructions in this document are identified by a warning-triangle symbol and
are printed on a grey background.
Notes are identified by the symbol shown on the left. They are bordered by horizontal
lines above and below the text.
Logamatic SC40 - Specifications subject to change without notice. 5
Details of the product 2
2 Details of the product
2.1 EU Declaration of Conformity
2.2 Product description
Diagram of solar thermal system
Fig. 1 System diagram
1Collector array
2Solar pumping station
3Solar system cylinder
4Controller SC40
The design and operation of this product conform to the applicable Euro-
pean directives and supplementary national requirements. Confirmity has
been demonstrated.
7747006071.01-1.SD
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2
3
4
Details of the product
Logamatic SC40 - Specifications subject to change without notice.
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2
Operating principle
If the set temperature difference between the collector array (ÆFig. 1, item 1) and the solar cylinder
(ÆFig. 1, item 3) is exceeded, the pump in the solar pumping station is switched on.
The pump transports the heat transfer medium (the heat transfer fluid) via the circuit through the col-
lector array to the consumer. This consumer is generally a solar storage cylinder. There is a heat
exchanger in the solar storage cylinder. This transfers the heat collected from the sun from the trans-
fer medium to the water intended for domestic use or heating.
If necessary, a hot water mixer unit is fitted to the cylinder to limit the hot water outlet temperature.
Controller
The controller is designed for use with a solar thermal system. It can be mounted on a wall or is inte-
grated in a solar pumping station.
Main components of the solar thermal system
Collector array – Consists of flat plate collectors or evacuated tube collectors
Solar pumping
station
– Consists of the pump together with safety valves and shut-off valves for the
solar thermal circuit
Solar system
cylinder
– Used for storing the collected solar energy
– There are three different types:
– Domestic hot water cylinder
– Reserve cylinder (for heating boost function)
– Combination cylinder (for domestic heating back-up and for domestic hot
water)
Controller
SC40
– Includes two temperature sensors
In normal operating mode, the display screen on
the controller stays illuminated in green/yellow for
5 minutes after the last button was pressed (acti-
vated by pressing the rotary selector , for
example).
The display shows the following:
– Pump status (as a simple system diagram)
– System values (e.g. temperatures)
– Selected functions
– Fault messages Fig. 2 Possible display indications
15
Logamatic SC40 - Specifications subject to change without notice. 7
Operation 3
3 Operation
Your professional heating technician will set the solar thermal system when commissioning it, and it
will run automatically.
VHave your heating engineer explain to you how the solar thermal system works, and how to oper-
ate it.
VDo not switch off the solar thermal system during long absences (e.g. when going on holiday).
When installed according to the manufacturer's specifications, the solar thermal system is intrin-
sically safe.
VAfter a power failure or a long absence, check the operating pressure on the pressure gauge of
the solar thermal system (ÆSection 5.4, page 14).
3.1 Elements of the solar pumping station
The main components of the solar pumping station are:
– Thermometers (ÆFig. 3, items 1 and 3): The built-in thermometers display the temperatures of
the solar return (blue) and flow (red).
– Pressure gauge (ÆFig. 3, item 2): the pressure gauge indicates the system pressure. The safety
valve above it opens and releases the excess fluid pressure via the blow-off pipe if the system
pressure rises above 6 bar.
Fig. 3 Solar pumping station
1Display of temperature for solar return
2Pressure gauge and safety valve
3Display of temperature for solar flow
Warning: Risk of damage to system if controller settings are changed.
VDo not make any changes to any settings not described here.
7747004985.09-1.SD
7747004985.09-1.SD
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2
Operation
Logamatic SC40 - Specifications subject to change without notice.
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3
3.2 controller controls
Fig. 4 controller and display
1Display
2Rotary selector
3Back button
4OK button
5Symbol for temperature sensor
6Displays of temperatures, hours of operation, etc.
7Valve symbol (black = open outlet)
8Active circulation diagram
Switching off the system
VDisconnect the controller from the mains power supply by means of the isolating device (e.g.
mains plug).
Control Symbol Functions
Rotary selector – Selecting system settings
OK button – Opening submenus and changing settings (engineers only)
Back button – Reverting to collector panel temperature display (View level)
7747006072-23.1 SD
15
1
2
3
4
5 1 6
78
OK
Logamatic SC40 - Specifications subject to change without notice. 9
Operation 3
3.3 Viewing system data
You can use the rotary selector to view the following system data if the relevant components
are installed and the supplementary functions have been activated by your heating engineer.
Display Supplementary function System data
None – Temperature (°C)
– Hours of operation, cumulative (h)
– Hours of operation, today (h/d)
– Pump speed (%)
– Pump and valve status
Heat meter – Flow temperature (°C)
– Return temperature (°C)
– Heat usage, cumulative (kWh)
– Heat usage, today (kWh/d)
Heat exchanger anti-icing
system
– Flow temperature (°C)
– Hours of operation, cumulative (h)
– Hours of operation, today (h/d)
Activated functions
Shows other active functions.
Possible indications (display flashes when function is active):
– Double Match Flow
– Evacuated tube collector function
– S. Europe function
–Dailyheating
– Cooling function
Tab. 1 Overview of system data
15
7
5
8
4
5
Other functions
Daily heating
Operation
Logamatic SC40 - Specifications subject to change without notice.
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3
Status display
Cylinder maximum temperature
The cylinder maximum temperature is displayed if the set limit is reached or
exceeded.
Collector minimum temperature
The collector minimum temperature is displayed if the temperature drops
below the limit, e.g. 20 °C.
Collector maximum temperature
The collector maximum temperature is displayed if the set limit, e.g. 120 °C,
is exceeded.
Tab. 2 Status indications
max.
max.
4
15
min.
min.
15
max.
max.
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