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TABLE OF CONTENTS
1 - GENERAL INFORMATION................................................................ 6
1.1 - Key to the symbols used ...................................................................................... 6
1.2 - Warranty ................................................................................................................. 6
2 - GENERAL LAYOUT of the main components ................................ 7
3 - INSTALLATION ................................................................................. 8
3.1 - Pre-Installation ....................................................................................................... 8
3.2 - Instructions for the user ....................................................................................... 8
3.3 - Clearances for installation .................................................................................... 8
3.4 - Clearances from combustible material ................................................................ 8
3.5 - Choosing the place of installation ....................................................................... 8
3.6 - Preparing to install the water heater .................................................................... 9
3.7 - Installation Template ............................................................................................. 9
3.8 - Supply and Return Piping .................................................................................. 10
3.9 - Radiant Heating Installation ............................................................................... 10
3.10 - Installation of two heaters ................................................................................ 10
3.11 - Installation of three or more heaters ................................................................ 10
3.12 - Multi-zone system with several pumps ........................................................... 10
3.13 - Multi-zone System ............................................................................................. 10
3.14 - Internal electrical connection settings............................................................. 10
3.15 - Use of glycol ...................................................................................................... 10
3.16 - Domestic Hot and Cold water .......................................................................... 10
3.17 - Water Hardness ................................................................................................. 11
3.18 - Gas supply ......................................................................................................... 11
3.19 - Operating at high altitudes ............................................................................... 11
3.20 - Connecting the supply, return, gas, cold water and hot water ...................... 12
3.21 - Safety relief valve .............................................................................................. 12
3.22 - Electrical connections ...................................................................................... 13
3.22.1 - Overview ................................................................................................. 13
3.22.2 - Choosing the room thermostat............................................................. 13
3.22.3 - Connecting the room thermostat ......................................................... 13
3.22.4 - Connecting the power supply cable .................................................... 14
3.22.5 - Functional electrical diagram ................................................................ 15
3.22.6 - Multiwire electric diagram...................................................................... 16
3.23 - Venting systems ................................................................................................ 17
3.23.1 - Rotation of the flue discharge/air intake fittings .................................. 18
3.23.2 - Kit for air intake/flue discharge ............................................................. 19
3.23.3 - 80/80 split system................................................................................... 20
3.23.4 - 80/80 split system: available accessories ............................................ 21
3.23.5 - 80/80 split system: installation examples ............................................ 22
3.23.6 - 60/100 coaxial system............................................................................ 23
3.23.7 - 60/100 coaxial system: available accessories ..................................... 25
3.23.8 - 60/100 coaxial system: installation examples...................................... 26
3.23.9 - Combustion air supplied from inside ................................................... 27
3.23.10 - Removing the condensation produced by flue gas discharge ........ 28
3.24 - Water Connections ............................................................................................ 29
3.25 - Filling the heating system ................................................................................. 40
3.26 - Ignition ............................................................................................................... 40
3.27 - Regulating the domestic hot water .................................................................. 40
3.28 - Disassembling the cover panels ...................................................................... 41