Table Of Contents - Biasi Basica Cond 25S User Manual And Installation Instructions

1 BOILER DESCRIPTION . . . . . . . . . . . . . . . 6
1.1 Assembly view. . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Shut-off valves and cocks . . . . . . . . . . . . . . . 6
1.3 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 General LCD characteristics . . . . . . . . . . . . . 7
2 USAGE INSTRUCTIONS. . . . . . . . . . . . . . 10
2.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 Heating circuit temperature . . . . . . . . . . . . . 11
2.4 Domestic hot water temperature . . . . . . . . . 12
2.5 Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3 USEFUL TIPS . . . . . . . . . . . . . . . . . . . . . . 14
3.1 Filling the heating circuit . . . . . . . . . . . . . . . 14
3.2 Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3 Antifreeze protection . . . . . . . . . . . . . . . . . . 14
3.4 Periodic maintenance . . . . . . . . . . . . . . . . . 15
3.5 External cleaning . . . . . . . . . . . . . . . . . . . . . 15
3.6 Operating anomalies . . . . . . . . . . . . . . . . . . 15
3.7 Displays in INFO mode . . . . . . . . . . . . . . . . 16
3.8 Flue thermal fuse. . . . . . . . . . . . . . . . . . . . . 17
4 TECHNICAL SPECIFICATIONS . . . . . . . . 18
4.1 Assembly view. . . . . . . . . . . . . . . . . . . . . . . 18
4.2 Schematic diagram . . . . . . . . . . . . . . . . . . . 19
4.3 Wiring diagram . . . . . . . . . . . . . . . . . . . . . . 21
4.4 Technical data M270V.2025 SM . . . . . . . . . 22
4.5 Technical data M270V.2530 SM . . . . . . . . . 26
4.6 Hydraulic characteristics . . . . . . . . . . . . . . . 30
4.7 Expansion vessel. . . . . . . . . . . . . . . . . . . . . 30
5 INSTALLATION . . . . . . . . . . . . . . . . . . . . . 31
5.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2 Installation precautions . . . . . . . . . . . . . . . . 32
5.3 Installing the boiler bracket . . . . . . . . . . . . . 32
5.4 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.5 Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.6 Boiler assembly . . . . . . . . . . . . . . . . . . . . . . 34
5.7 Installing the flue gas exhaust duct . . . . . . . 34
5.8 Flue gas outlet dimensions and lengths . . . 35
5.9 C exhaust-flue pipework. . . . . . . . . . . . . . 39
63
5.10 Positioning the draught terminals . . . . . . . . 40
5.11 Electrical connections . . . . . . . . . . . . . . . . . 41
5.12 Connecting a room thermostat or zone
valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Basica Cond 25S
Basica Cond 30S

TABLE OF CONTENTS

Models
5.13 Electrical connection of the remote control
(optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.14 Enabling of operation with remote control
(optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.15 Installing the external temperature sensor . 44
5.16 Electrical connection between the boiler
and the external sensor . . . . . . . . . . . . . . . . 44
5.17 Enabling operation with the external
sensor and setting the K coefficient. . . . . . . 44
5.18 Selecting the maximum heating
temperature setpoint with climatic curve set 47
5.19 Selecting the heating temperature set. . . . . 47
5.20 Setting pump post-circulation . . . . . . . . . . . 48
5.21 Selecting re-ignition frequency . . . . . . . . . . 49
5.22 Examples of hydraulic systems with
hydraulic separator (optional) . . . . . . . . . . . 50
6 PREPARATION FOR SERVICE . . . . . . . . 52
6.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.2 Sequence of operations. . . . . . . . . . . . . . . . 52
7 CHECKING THE GAS SETTING. . . . . . . . 55
7.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.2 Gas operations and setting . . . . . . . . . . . . . 55
8 GAS CONVERSION . . . . . . . . . . . . . . . . . 59
8.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.2 Gas operations and setting . . . . . . . . . . . . . 59
9 MAINTENANCE. . . . . . . . . . . . . . . . . . . . . 61
9.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.2 Removing the body panels . . . . . . . . . . . . . 61
9.3 Emptying the DHW circuit . . . . . . . . . . . . . . 62
9.4 Emptying the heating circuit . . . . . . . . . . . . 62
9.5 Cleaning the primary condensate
exchanger and the burner . . . . . . . . . . . . . . 63
9.6 Check the pressure in the heating
expansion tank . . . . . . . . . . . . . . . . . . . . . . 64
9.7 Cleaning the domestic hot water exchanger 64
9.8 Checking the flue gas expulsion duct . . . . . 64
9.9 Checking boiler efficiency . . . . . . . . . . . . . . 64
9.10 Checking the condensate discharge siphon 65
9.11 Setting the boiler's chimney sweep function 66
9.12 Settings for changing the control board. . . . 67
10 B OILER DISPOSAL AND RECYCLING . . 70
Boiler certification code
M270V.2025 SM
M270V.2530 SM
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