eta PU7 Installation Manual
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eta PU7 Installation Manual

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2020-07-21
EN
0000000061
V.022
1513
93003-003
PelletsUnit
7 - 15 kW
Installation

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  • Page 1 2020-07-21 0000000061 V.022 1513 93003-003 PelletsUnit 7 - 15 kW Installation...
  • Page 2 ETA Heiztechnik Gewerbepark 1 A-4716 Hofkirchen an der Trattnach Tel: +43 (0) 7734 / 22 88 -0 Fax: +43 (0) 7734 / 22 88 -22 info@eta.co.at www.eta.co.at...

  • Page 3: Table Of Contents

    Contents General ................5 Preface.
  • Page 4 12.9 Ventilation..............64 www.eta.co.at...

  • Page 5: General

    ETAtouch control system of your ETA boiler. A LAN cable is required for the connection Types of safety instruction from the ETAtouch control system to the internet modem.

  • Page 6: Warranty, Guarantee And Liability

    Addition of hard water should be minimised to limit restrict the functionality of the system. limescale build-up in the boiler. www.eta.co.at...

  • Page 7: Dismantling, Disposal

    Repair of defects For repairs of defects carried out by the customer or by a third party, ETA shall only bear the costs or remain obligated by warranty if this work was approved in writing in advance by the customer service of ETA Heiztechnik GmbH.

  • Page 8: Technical Data

    Flow for hot water tank, R3/4" coupling Heating circuit 1 flow, R3/4" coupling Discharge fitted with 1/2“ filling and drainage valve Outlet for the safety valve, flat sealing union nut R1“ 10 Air connection for external air operation, DN80 www.eta.co.at...
  • Page 9 Technical data The flue gas connection on the boiler does not yet give any indication of the required chimney diameter. Information on the required chimney diameter can be found in the installation instructions for the boiler in the Chimney chapter. PelletsUnit Unit Rated capacity...

  • Page 10: Energy Labelling

    0.012 0.012 0.012 Energy efficiency class boiler Energy efficiency index boiler Energy efficiency class "package-system" Energy efficiency index "package-system" Seasonal space heating energy efficiency mg/m³ Seasonal space heating emissions - dust <40 <40 <40 <40 <40 <40 (10% O www.eta.co.at...
  • Page 11 Technical data Energy Labelling PelletsUnit 7-15 kW Model identification Unit PU11 PU11 PU15 PU15 mg/m³ Seasonal space heating emissions - OGC <20 <20 <20 <20 <20 <20 (10% O mg/m³ Seasonal space heating emissions - CO <500 <500 <500 <500 <500 <500 (10% O...

  • Page 12: Regulations, Standards And Guidelines

    EN 15287-1, flue systems for heating appliances dependent on ambient air - planning, installation and commissioning • EN 15287-2, flue systems for heating appliances with external air supply - planning, installation and commissioning • In Germany, DIN 18160 "Flue systems – planning and design" www.eta.co.at...

  • Page 13: Ce-Conformity

    Heating boilers, Part 1 and 4 We hereby declare that the product in its standard design as stated here corresponds to the above provisions. The technical documentation for this product is administered by ETA Heiztechnik GmbH. Hofkirchen, 31/10/2018 Ing. Johann Eibelhuber...

  • Page 14: Boiler Room

    [kW] tion from land Requirements for the boiler room ETA) Boiler rooms must be built with fire-resistant F90 (EI90) walls and ceilings; in Switzerland El30 up to 70 kW and EI60 over 70 kW. An escape door to a corridor or to the outside is required.
  • Page 15 Boiler room In Austria, no more than a week's supply of wood may be stored next to the boiler. For pellets, a separate storeroom EI90 (F90) with a EI30 (T30) door is required. As a result of amendments to building laws, up to 10 tonnes of pellets may be stored in the boiler room in some states.

  • Page 16: Safety

    This action prevents the boiler temperature from rising further and triggering further safety devices such as the safety temperature limiter. www.eta.co.at...
  • Page 17 Safety Safety devices Heat dissipation is limited by the selected maximum flow temperature in the heating circuits and the target hot water temperature. Safety shutdown by safety temperature limiter For additional safety against boiler overheating, a safety temperature limiter is built into the boiler. When a boiler temperature of 100 °C (tolerance +0°/-6 °C) is reached, the power supply to the draught fan and the fuel intake is interrupted.

  • Page 18: Information For Installation

    PU 15 DN 110 13 (11) DN 113 13 (11) DN 110 13 (11) DN 113 13 (11) DN 110 12 (11) DN 113 12 (11) DN 110 12 (11) DN 113 12 (11) www.eta.co.at...
  • Page 19 Information for installation Chimney Required chimney diameter in cm Diameter of the flue pipe from Chimney height above the boiler to chimney boiler room floor PU 15 DN 110 12 (11) 10 m DN 113 12 (11) DN 110 12 (11) 11 m DN 113 12 (11)
  • Page 20 A flue pipe to the chimney with a large cross section would reduce the calculated required chimney cross section. However, ash deposits will form at low flow speeds, and the theoretically calculated flue draught will be lost again. www.eta.co.at...
  • Page 21 Information for installation Chimney measurement opening because, otherwise, turbulence Cleaning opening in flue pipe at the measurement points will prevent meaningful Easily accessible cleaning openings must be available measurements. The clearance from the boiler's flue for cleaning the flue pipe. duct connection or from a pipe bend must be at least twice the diameter of the flue duct.

  • Page 22: Renovation

    After a soot fire, the inner pipe is in all likelihood no longer sufficiently leakproof, making the chimney subject to damage by moisture. In this case, the inner pipe needs to be replaced without fail, regardless of whether its resistance to soot fires has been checked or not. www.eta.co.at...

  • Page 23: Water Hardness

    Information for installation Water hardness Water hardness Determine permissible water hardness for the heating water according to ÖNORM H 5195-1 Table 1 Table 2 Heat producer with large (> 0.3 l/ Heat producer with small (> 0.3 l/ kW) water content kW) water content ≥...

  • Page 24: Corrosion

    (pipe lengths over 5000 running metres). A separation of the surface heating system from the heating boiler is www.eta.co.at...

  • Page 25: Pressure Equalisation

    A system separation (buffer fully loaded if installed) is greater than 1.0 bar module with these specifications is available from ETA. for a single-storey system or 0.5 bar for a three-storey system, then the expansion tank is too small and absolutely must be replaced with a larger one.

  • Page 26: Noise Emission

    In normal operation, the airborne noise emissions from ETA sound-insulation set. Design the rigidly a pellet or wood chip boiler is between 40 and 50 dB(a) connected installation (flow and return, thermal...

  • Page 27: Operation With External Air Supply

    Operation with external air supply Operation with external air supply Systems with an annular air supply (LAS systems) can Operation with external air supply is possible also be used, as long as they have an insulated inner Only the boilers of the PelletsUnit 7-15 kW as pipe and a corresponding certification.
  • Page 28 Maximum length of air supply duct PelletsUnit Maximum length 15 m duct, 80 mm diameter and no more than 5 bends. 7 - 15 kW Each additional bend reduces the total length by 2 m. www.eta.co.at...

  • Page 29: Buffer Storage Tank

    Buffer storage tank General information Buffer storage tank General information • in low-energy houses, when a substantial portion of the boiler's operating time is spent below its output range. At low heating loads, either install a buffer or set • during the transitional period in autumn/spring short heating time slots when there is very low heating demand, such as...

  • Page 30: Hydraulic Integration

    Temperature sensor [Sensor 3] The temperature sensor [Sensor 3] must always be positioned just above the lowest return connection. This is also important for buffers from third parties so that they are not positioned beneath the lowest return connection. www.eta.co.at...
  • Page 31 Buffer storage tank Hydraulic integration With solar exchanger and fresh water module With fresh water module Fresh water module flow Temperature sensor [Sensor 1 (upper)] Fresh water module flow Boiler, heating circuits, oil/gas boiler flow Boiler, heating circuits, oil/gas boiler flow Temperature sensor [Sensor 2] Temperature sensor [Sensor 1 (upper)] Oil/gas boiler return...
  • Page 32 Boiler, heating circuits, oil/gas boiler flow Solar flow, top Temperature sensor [Sensor 2] Oil/gas boiler return Temperature sensor [Sensor 3] Solar flow, lower Boiler, high-temperature circuit return 10 Temperature sensor [Sensor 4] 11 Fresh water module return, solar 12 Low-temperature circuits return www.eta.co.at...

  • Page 33: 10 Installation

    Installation Placement of the boiler 10 Installation 10.2 Removing panels Assembly and installation only by qualified specialist personnel The assembly and installation may be performed Remove the cover on the top by specialist personnel with the corresponding Remove the cover from the top of the boiler. qualifications only.
  • Page 34 Level boiler with levelling feet Unscrew the screws on the panel, lift and remove it. Then the levelling feet are accessible from below. Fig. 10-7: Cover The boiler's circuit boards are located behind it. Fig. 10-5: Panel Fig. 10-8: Circuit boards www.eta.co.at...

  • Page 35: Connecting Piping

    Installation Connecting piping 10.3 Connecting piping Check position of return riser mixing valve Check the position of the return riser mixing valve. The flattening on its shaft must face upwards, Indicating Connecting the piping to the boiler that the bypass pipe is blocked. Fig.

  • Page 36: Conversion For Buffer Operation

    Turn the return riser mixing valve's shaft until the this by removing the screw from the knob and then flattening faces between the bypass pipe and the flow detaching the actuator. pipe. Fig. 10-14: Turning the return riser mixing valve Fig. 10-12: Actuator on flow mixing valve www.eta.co.at...
  • Page 37 Installation Conversion for buffer operation Fit the actuator to the return riser mixing valve and Installing the twist guard secure it with the screw in the knob. Remove the actuator twist guard from the flow mixing valve and attach it to the return riser mixing valve. Fig.

  • Page 38: Cables

    Fill the boiler via the fill/drain valve. The current system pressure is shown on the pressure gauge. Fig. 10-20: correct position of the changeover valve The actuator is no longer required. You can disconnect its cable from the circuit board and leave it on the boiler. www.eta.co.at...

  • Page 39: Attaching Pellet Hoses

    Installation Attaching pellet hoses In the event of a fire, the internal material of the fire CAUTION! protection sleeve expands and thus closes the pellet Boiler shutdown due to excessive water pressure hoses. This prevents burn-back in rooms through which the pellet hoses are fed. During operation the pressure limiter switch shuts down the boiler at a water pressure of CAUTION!

  • Page 40: Network Connection

    Fig. 10-25: Network cable If the network cable is long enough, connect the plug directly into the router or the ETA PowerLine. If it is not long enough, use a network extension (1x plug / 1x socket) to connect to the router or ETA PowerLine.
  • Page 41 Installation Network connection...

  • Page 42: 11 Electrical Connections

     Before beginning any work, isolate the system completely from all power sources, ensure that it cannot be switched back on, and verify that it is safely isolated from supply. Fig. 11-2: Analogue input Fig. 11-3: Digital switch www.eta.co.at...
  • Page 43 Electrical connections Requirements Fig. 11-4: Speed-controlled pump Fig. 11-5: Special function - pump (with supply extension 230 Fig. 11-6: Special function - changeover valve with three- point controlling Fig. 11-7: Special function - burner...

  • Page 44: Overview Of Circuit Boards

    Overview of circuit boards Electrical connections 11.2 Overview of circuit boards Overview of boiler circuit boards www.eta.co.at...
  • Page 45 Electrical connections Overview of circuit boards...

  • Page 46: Pe-C4 Circuit Board

    Switching unit: reference-point switch (termi- S520 24 V input 3x 0.75 mm² nal [S10]) switching unit: position switch (terminal S521 24 V input 3x 0.75 mm² [S11]) S523 24 V input ExtDem S532 CAN Bus 2 x 2 x 0.6 mm www.eta.co.at...
  • Page 47 Electrical connections PE-C4 circuit board These terminals have already been pre-wired at the factory: Terminal Function Standard assignment CAN node CAN Bus node switch Fuse 230 V, T 6,3 A (electronics) Fuse 230 V, T 8 A (vacuum turbine / ignition) Fuse 230 V, MT 5 A (conveying system) T 500 mA fuse (CAN Bus) Fuse T 500 mA (24 V supply)
  • Page 48 PE-C4 circuit board Electrical connections These terminals have already been pre-wired at the factory: Terminal Function Standard assignment CAN Bus terminal resistor www.eta.co.at...
  • Page 49 Electrical connections PE-C4 circuit board...

  • Page 50: Circuit Board Gm-C3

    S501 T8 Temperature input 2 x 0.5 mm² example, there are three temperature sen- sors on the buffer, then buffer temperature sensor 1 is at the top, buffer sensor 2 in the middle and buffer sensor 3 at the bottom. www.eta.co.at...
  • Page 51 Electrical connections Circuit board GM-C3 These terminals can be used (depending on the configuration): Minimum Terminal Function cross-sec- Standard assignment tion S501 T9 Temperature input 2 x 0.5 mm² Buffer temperature sensor 2 S501 T10 Temperature input 2 x 0.5 mm² Buffer temperature sensor 3 S501 T11 Temperature input...

  • Page 52: Concluding Activities

    Reinstall the parts of the boiler casing that were removed during the assembly. Removing protective film Remove protective film from all covers. After longer periods of operation of the boiler, the film can no longer be removed without damaging the paint. www.eta.co.at...

  • Page 53: 12 Pellet Store

    Placement of the storeroom is crucial for satisfactory all ETA pellet boilers with a rotary valve so that even operation. For this reason, do not place the pellet store during operation there is no open connection between underneath or in the immediate vicinity of bedrooms.

  • Page 54: Requirements For Pellet Store

    Therefore, the pellet store must be "emptied" at the latest every three years, so that the dust can be removed before refilling. Shovel "old" pellets either to the discharge screw or the suction probe, so that they are quickly used up. www.eta.co.at...

  • Page 55: Calculating Pellet Supply And Store Size

    Pellet store Calculating pellet supply and store size 12.3 Calculating pellet supply and The length of the conveying system needed for the storage volume can be determined using table Tab. store size 12-1: "Useful cross section". That length also determines the minimum length of the storeroom. Heating value and bulk weight of pellets Example: Room width 2 m and height 2.4 m: •...

  • Page 56: Filling Nozzles

    500 mm from the wall to prevent damage to both pellets and the plasterwork on the wall. The filling nozzles must be installed 200 mm below the ceiling to keep the pellets from scraping on the ceiling during injection. www.eta.co.at...
  • Page 57 Each half of the room needs its own nozzle with an impact protection mat on the opposite side. The disad- ETA filling nozzles with 100 mm diameter fit exactly in vantage is that halfway through the filling process, the the cut-outs made for fitting a sewer pipe with 110 mm hoses must be exchanged.

  • Page 58: No Cables/Pipes In The Pellet Store

    For filling nozzles and sealing caps available from system. Do not use plastic piping (danger due to ETA, the interior of the sealing caps contain a cover for electrostatic charge build-up). sealing. If this cover is removed, air enters the pellet store via the sealing cover.

  • Page 59: Tilted Floor

    Pellet store Tilted floor itself may not lean against the walls since the often statically inadequately dimensioned walls do not have the strength to withstand the forces involved. Only explosion-proof electrical installations DANGER! No electrical equipment such as switches, lights, junction boxes, etc.
  • Page 60 Mounting the suction probes on a wooden board If the suction probes sit directly on a cold concrete floor, water from the circulating air can condense on them. The condensation can cause pellets and, in particular, pellet dust to form clumps that can clog the www.eta.co.at...

  • Page 61: Information About Pellet Hoses

    Pellet store Information about pellet hoses 12.7 Information about pellet hoses Suitable pellet hose DN50 pellet hoses with copper litz wire (for earthing) are required for the suction and return air. Fig. 12-15: Avoid twisting pellet hoses Maximum length: 20 m The maximum length of the pellet hose is 20 m.

  • Page 62: Fire Safety Regulations

    15 m³ (9.5 tons) (Bulletin MVB 29/2005 from Upper Austrian fire prevention agency). Fig. 12-17: Fire protection sleeve Use the supplied concrete screws to fasten the fire protection sleeve. These screws are screwed directly into the wall by pre-drilling, but without dowels. www.eta.co.at...
  • Page 63 1 m or sheet metal heat deflector. This alarm thermostat is not required for an ETA • No other use.

  • Page 64: Ventilation

    Fan with three-times air exchange rate per hour related to the gross volume of the store • The function of the fan is to be coupled with the opening of the store room door Tab. 12-2: Requirements of VDI 3464 www.eta.co.at...
  • Page 65 Pellet store Ventilation Even if the filling nozzles protrude into a room in which ventilation is available, ÖNORM M 7137 recommends Example for ventilating the pellet store using only sealed, unventilated sealing covers. Fig. 12-20: Filling nozzles in the boiler room Fig.
  • Page 66 www.eta.co.at...
  • Page 68 DOWNLOAD www.eta.co.at...

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