
HeatMaster 25 C: A1003474 - 664Y7000 • B
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TABLE OF CONTENTS
GENERAL RECOMMENDATIONS....................................................................................3
Safety Instructions........................................................................................................................................................................3
USER’S GUIDE...................................................................................................................4
Meaning of Symbols....................................................................................................................................................................4
Boiler Marking................................................................................................................................................................................5
Control Panel and Display .........................................................................................................................................................6
Stand-by Screen............................................................................................................................................................................7
Lockout Screen ..............................................................................................................................................................................7
Status Messages ............................................................................................................................................................................7
What to Check on a Regular Basis ..........................................................................................................................................8
In case of Problem........................................................................................................................................................................8
Boiler Setup Guide .......................................................................................................................................................................8
APPLIANCE DESCRIPTION............................................................................................15
HeatMaster®25 C........................................................................................................................................................................15
Conguration in a system........................................................................................................................................................15
HeatMaster® 25 C overview ....................................................................................................................................................15
Connections - at the back........................................................................................................................................................16
TECHNICAL CHARACTERISTICS..................................................................................17
Dimensions ...................................................................................................................................................................................17
Clearance .......................................................................................................................................................................................17
Combustion characteristics....................................................................................................................................................18
Gas categories..............................................................................................................................................................................18
Chimney connection characteristics...................................................................................................................................19
Calculation of the ue pressure drop in the ue pipes............................................................................................... 20
Cascade : calculation of the maximum length of ue pipes......................................................................................21
Electrical Characteristics HeatMaster®25 C..................................................................................................................... 22
Hydraulic Characteristics .........................................................................................................................................................24
Hydraulic Pressure Drop Curve of the Boilers..................................................................................................................24
DHW performance .....................................................................................................................................................................24
Maximum Operating Conditions..........................................................................................................................................24
Recommendations for the Prevention of Corrosion and Scaling in Heating Systems.................................... 25
G3 Requirements and Guidance - UK Only...................................................................................................................... 26
INSTALLATION ..............................................................................................................28
Safety Instructions for the Installation .............................................................................................................................. 28
Package contents....................................................................................................................................................................... 29
Tools Required for the Installation...................................................................................................................................... 30
Boiler preparation...................................................................................................................................................................... 30
Hydraulic Connections ............................................................................................................................................................ 30
DHW Connection....................................................................................................................................................................... 30
Heating Connection ..................................................................................................................................................................31
Removal and Installation of the Front and Top Panels.................................................................................................32
Gas Connection...........................................................................................................................................................................32
Conversion to Propane.............................................................................................................................................................33
CONFIGURATION AND SYSTEM SETUP.....................................................................34
Basic Conguration - HeatMaster 25 C: High Temperature Heating Circuit with Control by Room Ther-
mostat and Optional Outdoor Sensor............................................................................................................................... 34
Cascade Conguration, Controlled by EBV Controller .............................................................................................. 35
STARTING UP .................................................................................................................36
Safety Instructions for Starting up...................................................................................................................................... 36
Tools Required for Starting up.............................................................................................................................................. 36
Checks before Starting up...................................................................................................................................................... 36
Filling the system....................................................................................................................................................................... 36
Starting up the Boiler ................................................................................................................................................................37
Checking and Adjusting the Burner....................................................................................................................................37
MAINTENANCE..............................................................................................................38
Safety Instructions for the Boiler Maintenance.............................................................................................................. 38
Tools Required for Maintenance.......................................................................................................................................... 38
Boiler shut down for Maintenance...................................................................................................................................... 38
Periodic Boiler Maintenance Tasks...................................................................................................................................... 38
Draining the Boiler .....................................................................................................................................................................39
Removal, Check and Installation of the Burner Electrode ..........................................................................................39
Removal and Installation of the Burner ............................................................................................................................ 40
Cleaning the Exchanger...........................................................................................................................................................41
Restarting after Maintenance................................................................................................................................................41
Torque Values...............................................................................................................................................................................41
LOCKING CODES ...........................................................................................................42
SERVICE LOG..................................................................................................................45
DECLARATION OF CONFORMITY...............................................................................46
ECODESIGN DATA..........................................................................................................47
PRODUCT FICHE............................................................................................................48