Safety instructions Please follow these safety instructions closely to prevent accidents and mate- rial losses. Safety instructions explained ■ the Code of Practice of relevant trade associations, Danger ■ all current safety regulations as This symbol warns against the defined by DIN, EN, DVGW, TRGI, risk of injury.
Index Preparing for installation................... Installation sequence Fitting the casing panels..................Making the electrical connections................ 11 ■ Open the control unit wiring chamber............... 11 ■ Overview of electrical connections..............12 ■ Inserting cables/leads and applying strain relief..........12 ■ Connecting sensors..................14 ■...
Preparing for installation Clearance dimensions for pellet supply via vacuum system (400) A Boiler B Pellet hopper Minimum clearances Rated output range 4 to 12 11 to 32 6 to 18 13 to 40 8 to 24 16 to 48 1000 1980 2280...
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Preparing for installation (cont.) Clearance dimensions for pellet supply via flexible auger A Boiler B Connection unit for pellet supply via flexible auger Minimum clearances Rated output range 4 to 12 11 to 32 6 to 18 13 to 40 8 to 24 16 to 48 1500...
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Preparing for installation (cont.) Installation Use the adjustable feet to give the boiler a slight incline towards the back.
Making the electrical connections When connecting external switching contacts or components to the low voltage circuit of the control unit, please observe the safety requirements of protection class II, i.e. 8.0 mm air gap/creep path or 2.0 mm insulation thickness towards 'live' compo- nents.
Making the electrical connections (cont.) Overview of electrical connections Service instructions and plug connection diagram Inserting cables/leads and applying strain relief On-site cables/leads Strip up to 100 mm of insulation.
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Making the electrical connections (cont.) Cables with moulded strain relief If the distance between the moulded-on strain relief and the cable/lead end is too short, provide a strain relief as for on-site cables/leads (see page 12).
Making the electrical connections (cont.) Connecting sensors Note Check existing hydraulic components (see service instructions, chapter "Matching the control unit to the heating system") and assign slots accordingly. 1 2 3 A Outside temperature sensor F Cylinder temperature sensor (in B Buffer cylinder temperature sensor, conjunction with a solar thermal sys- tem)
Making the electrical connections (cont.) Connecting pumps Available pump connections Circulation pump for cylinder heating sÖ M1 Heating circuit pump DHW circulation pump sÖ M2 Heating circuit pump Boiler circuit pump in conjunc- tion with the heating water buffer Solar circuit pump cylinder Pumps 230 V~ Rated current...
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Making the electrical connections (cont.) Pumps with power consumption greater than 2 A N PE External ON/OFF A Pump D Separate power connection B To the control unit (observe manufacturer's details) C Contactor...
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Making the electrical connections (cont.) Temperature limiter (maximum temperature limiter) for underfloor heating sys- tems Electromechanical temperature limiter according to the liquid expansion princi- ple. Switches the heating circuit pump OFF, when the set value has been exceeded. In such cases, the flow temperature reduces only slowly, i.e.
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Making the electrical connections (cont.) Pumps 400 V~ For controlling the contactor Rated current 4(2) A~ L1 L2 L3 N PE Recommended connecting cable H05VV-F3G 0.75 mm H05RN-F3G 0.75 mm A Contactor B Pump Solar circuit pump in conjunction with a solar thermal system The power consumption of the pump must not exceed 2 A.
Making the electrical connections (cont.) Pumps in the underfloor heating circuit B Secondary pump (after system separation) C Primary pump The joint power consumption of both pumps must not exceed 2 A. Note Connection only for underfloor heating systems with system separation. sÖ...
Making the electrical connections (cont.) External connections at plug aVD 1 2 3 A External demand/changeover of heating program/external "Mixer open" (zero volt contact) B External blocking/external "Mixer close" (zero volt contact) Pellet charger Service instruction of the boiler (connection and wiring diagram) and installation instructions of the supply system Accessories...
Installing the flue gas fan M8x25 a-ÖA a-Ö Insert the plug of the flue gas fan in slot Please note a-Ö and a-Ö A and insert Lambda probe Contact between cables/leads and hot components results in plug a:K in the control unit wiring cham- material losses and incorrect ber.
Installing the timer Note The timer ensures that, in case of a PCB fault in the control unit, the supply motor shuts down no later than after 1 min. 3.9 x 9.5...
Fitting the connection unit to the boiler 1. Insert the threaded studs supplied Note with its short thread into the supply After installing the pellet hopper or pellet flange of the boiler. supply system with flexible auger, insert plug kD of power cable A into the plug- 2.
Power supply Directives Regulations Make the power supply connection and implement all earthing measures (i.e. RCD circuit) in accordance with IEC 60364-4-41, the requirements of your local power supply utility, VDE or national regulations. Protect the power cable to the control unit with an appropriate fuse/MCB.
Power supply (cont.) 2. Connect the power cable at the junc- 3. Insert plug fÖ into the control unit. tion box and plug fÖ (on-site). Colour coding to DIN IEC 60757 Danger brown Incorrect core termination can blue cause severe injuries and GNYE green/yellow damage to the equipment.
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Fitting the top back panel (cont.) Installation and service instruc- tions, connection unit, charging auger Installation and service instruc- tions, pellet hopper (if supplied) 3,9 x 9,5...
Fitting the combustion chamber door and the front panel Note Before closing the combustion chamber door ensure that no foreign bodies are left inside the combustion chamber. Check the combustion chamber parts for completeness and good fit. Hook in the door, close it and bolt it down.
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Fitting the combustion chamber door and the… (cont.) A Type plate Note The front panel (door) clicks into place upon closing.
Connecting the boiler on the flue side Note Install a flexible connecting piece in the flue pipe to prevent sound transmission caused by the induced draught fan. Never grout the flue pipe into the chimney. a According to TRVB H118, a deflagration cover (explosion cover) should be installed in the flue pipe or chimney.
Connecting the boiler on the heating water side Note Only connect regulated heating circuits with mixer. A Safety connection 12 to 24 kW: G 1½ 32 to 48: kW G 2 B Boiler flow 12 to 24 kW: G 1½ 32 to 48: kW G 2 C Boiler return 12 to 24 kW: G 1½...
Keyword index Boiler location........4, 5 Main isolator........24 Boiler water temperature sensor..14 Outside temperature sensor....14 Central fault messaging.....19 Connection Plug aVD..........20 ■ Expansion vessel......31 ■ On the flue side......30 Plug gÖ..........19 ■ On the heating water side....31 Power cable........24 ■ Safety valve........31 Power supply........24 Cylinder temperature sensor....14 Pumps...
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