REMEHA Calenta 25s, Installation And Service Manual

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4.3 Choice of the location ........................................22
4.3.1 Data plate ..............................................................22
4.3.2 Location of the boiler .............................................22
4.3.3 Ventilation .............................................................23
4.3.4 Main dimensions ...................................................24
4.4 Positioning the boiler .........................................25
4.5 Alternatives for hydraulic connections ............26
4.5.1 Connection of the underfloor heating ....................26
4.5.2 Connection of a solar hot water tank .....................26
4.5.3 Connection of an independent hot water
tank .......................................................................27
4.5.4 Geyser use ............................................................28
4.5.5 Solo use ................................................................29
4.6 Hydraulic connections .......................................29
4.6.1 Flushing the system ..............................................29
4.6.2 Connection of the heating circuit ...........................30
4.6.3 Hydraulic connection of the water circuit for domestic
use ........................................................................31
4.6.4 Connecting the expansion vessel .........................31
4.6.5 Connecting the condensate discharge pipe ..........31
4.7 Gas connection ...................................................32
4.8 Connections for the air and exhaust
pipes ....................................................................32
4.8.1 Classification .........................................................32
4.8.2 Outlets ...................................................................33
4.8.3 Lengths of the air/flue gas pipes ...........................34
4.8.4 Specific air/flue gas applications ...........................36
4.8.5 Additional Directives ..............................................36
4.8.6 Air/Exhaust adapter ...............................................37
4.8.7 Connection of the combustion gas exhaust
pipe .......................................................................38
4.8.8 Connection of the air intake pipe ...........................38
4.9 Electrical connections ........................................39
4.9.1 Control unit ............................................................39
4.9.2 Recommendations ................................................40
4.9.3 Standard control PCB ...........................................41
4.9.4 Connecting the room thermostat ...........................42
4.9.5 Connecting the outside temperature sensor ........43
4.9.6 Connect frost protection ........................................43
4.9.7 Connecting the calorifier sensor/thermostat .........44
4.9.8 PC/Laptop connection ...........................................45
4.9.9 Shutdown input .....................................................45
4.9.10 Release input ........................................................45
4.10 Optional electrical connections ........................46
4.10.1 Connection options for the 0-10 V control PCB
(IF-01) ...................................................................46
4.10.2 Connection possibilities for the PCB (SCU-
S02) .......................................................................47
Contents
040412 - 7600585-01 2