Strebel K4G1H24PX Product Manual

Strebel K4G1H24PX Product Manual

K4 series gas condensing boiler

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Gas Condensing Boiler K4
Ökotec 25
Product Manual
Aufstellungs- und
Bedienungsanleitung
Produktinformation

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Table of Contents
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Summary of Contents for Strebel K4G1H24PX

  • Page 1 Gas Condensing Boiler K4 Ökotec 25 Product Manual Aufstellungs- und Bedienungsanleitung Produktinformation...
  • Page 3: Safety Information

    Please keep and preserve this manual. Warranty and Liability for Defects STREBEL provides a warranty on the boiler K4 for the period of 24 months from the product commis- sioning date. Within this warranty the manufacturer agrees to remove the defects of the product in the form of a repair free of charge.
  • Page 4 The use of other settings than those listed in this manual can cause malfunctions in the system. To replace defective parts of the boiler, only use original STREBEL spare parts. Possible Risks No flammable objects must be placed, built or suspended near the boiler and flue gas ducting (a safe distance of the appliance from flammable materials is 50 mm from the boiler front and 10 mm in other directions).
  • Page 5: Table Of Contents

    Contents 1 Boiler Application and Benefits ............................6 1.1 Boiler Benefits: .................................6 2 Boiler Versions ..................................6 3 Technical Data ..................................7 3.1 Boiler Connection K4, 24 kW, 3.2 Boiler connection K4, 24 kW ..................7 3.3 Thermal Parameters K4, 24 kW ............................8 3.4 Boiler connection K4, 33 kW, 3.5 Boiler connection K4, 33 kW ..................
  • Page 6: Boiler Application And Benefits

    General Information Boiler Versions 1 Boiler Application and Benefits The K4 condensing boiler has been designed for combustion of low pressure natural gas. The boiler size is suitable for heating of family homes and apartments as well as recreational facilities as.
  • Page 7: Technical Data

    Technical Data 3 Technical Data 3.1 Boiler Connection K4, 24 kW K4G1H24ZX K4G1H24PX K4G2H24ZX K4G2H24PX K4G3H24ZX K4G3H24PX Fuel type Natural gas Propane Natural gas Propane Natural gas Propane Category of appliance Version Weight [kg] 27.5 26.5 Water volume Boiler dimensions [mm] –...
  • Page 8: Thermal Parameters K4, 24 Kw

    Technical Data 3.3 Thermal Parameters K4, 24 kW (comparison conditions 15 °C and 101.325 kPa, dry gas) K4G1H24ZX K4G1H24PX K4G2H24ZX K4G2H24PX K4G3H24ZX K4G3H24PX Boiler output range [kW] 5 – 24 Nom. output 80/60°C [kW] P=22.2 Nom. output 50/30°C [kW] P=24 Min.
  • Page 9: Boiler Connection K4, 33 Kw, 3.5 Boiler Connection K4, 33 Kw

    Technische Daten 3.4 Boiler connection K4, 33 kW K4G1H24ZX K4G1H24PX K4G2H24ZX K4G2H24PX K4G3H24ZX K4G3H24PX Fuel type Natural gas Propane Natural gas Propane Natural gas Propane Category of appliance Version Weight [kg] 29.5 28.5 Water volume Boiler dimensions [mm] – width –...
  • Page 10: Thermal Parameters K4, 33 Kw

    Technische Daten 3.6 Thermal Parameters K4, 33 kW (comparison conditions 15 °C and 101.325 kPa, dry gas) K4G1H24ZX K4G1H24PX K4G2H24ZX K4G2H24PX K4G3H24ZX K4G3H24PX Boiler output range [kW] 6.5 – 33 Nom. output 80/60°C [kW] P=30.5 Nom. output 50/30°C [kW] P=33 Min.
  • Page 11 Technical Data General Information K4G2H24.. Ohřev TV - T 25°C K4G2H24.. Hot water heating - ΔT 25 °C ∆ 16,50 14,50 12,50 10,50 8,50 6,50 4,50 2,50 3,50 4,50 5,50 6,50 7,50 8,50 9,50 Hot water flow rate (l/min) Průtok TV (l/min) K4G2H24..
  • Page 12 Technical Data General Information K4G2H33.. Ohřev TV - T 35°C ∆ K4G2H33.. Hot water heating - ΔT 25 °C 24,00 19,00 14,00 9,00 4,00 3,00 5,00 7,00 9,00 11,00 13,00 15,00 Hot water flow rate (l/min) Průtok TV (l/min K4G2H33.. Ohřev TV - T 30°C ∆...
  • Page 13 Standby heat loss 0,045 stby At part load 0,011 Ignition burner power consumption In standby mode 0,003 Emissions of nitrogen oxides Strebel Ltd. VIADRUS a.s. Contact details Bezručova 300 Unit 10, Invincible Road, Bohumín Farnborough, Hampshire, GU14 7QU 735 81 UNITED KINGDOM Czech Republic High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
  • Page 14 Declared load profile Water heating energy efficiency ƞ Daily electricity consumption 0,204 Daily fuel consumption 23,215 elec fuel Strebel Ltd. VIADRUS a.s. Contact details Bezručova 300 Unit 10, Invincible Road, Bohumín Farnborough, Hampshire, GU14 7QU 735 81 UNITED KINGDOM Czech Republic High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
  • Page 15 Declared load profile Water heating energy efficiency ƞ Daily electricity consumption 0,222 Daily fuel consumption 24,301 elec fuel Strebel Ltd. VIADRUS a.s. Contact details Bezručova 300 Unit 10, Invincible Road, Bohumín Farnborough, Hampshire, GU14 7QU 735 81 UNITED KINGDOM Czech Republic High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
  • Page 16 At part load 0,04 Ignition burner power consumption In standby mode 0,003 Emissions of nitrogen oxides VIADRUS a.s. Strebel Ltd. Contact details Bezručova 300 Unit 10, Invincible Road, Bohumín Farnborough, Hampshire, GU14 7QU 735 81 UNITED KINGDOM Czech Republic High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
  • Page 17 Declared load profile Water heating energy efficiency ƞ Daily electricity consumption 0,180 Daily fuel consumption 22,66 elec fuel Strebel Ltd. VIADRUS a.s. Contact details Bezručova 300 Unit 10, Invincible Road, Bohumín Farnborough, Hampshire, GU14 7QU 735 81 UNITED KINGDOM Czech Republic High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
  • Page 18 Declared load profile Water heating energy efficiency ƞ Daily electricity consumption 0,190 Daily fuel consumption 25,742 elec fuel Strebel Ltd. VIADRUS a.s. Contact details Bezručova 300 Unit 10, Invincible Road, Bohumín Farnborough, Hampshire, GU14 7QU 735 81 UNITED KINGDOM Czech Republic High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
  • Page 19: Boiler Design

    Boiler Design Servicing 4 Boiler Design 10.2 Possible Placement The installation and operation of the boiler shall comply with all requirements The K4 range of compact, wall hung condensing boilers are suitable for Heating & Hot Water genera- tion (depending on model). The boiler placement shall comply with the project documentation.
  • Page 20: Removing The Front Cover, 4.5 Main Boiler Parts

    electronic panel with the control panel pressure gauge valve for adding water to the heating system Boiler Design Fig. №. 2 The VIADRUS K4 boiler control panel 4.2.1 Removing the front cover 4.4 Removing The Front Cover neral Information Main Boiler Parts •...
  • Page 21 Boiler Design General Information General Information General Information K4G1HXXXX with only water heating for the system condensing exchanger output of hot water from the exchanger condensing exchanger output of hot water from the exchanger condensing exchanger output of hot water from the exchanger input of return water to the exchanger input of hot water to the radiators input of return water to the exchanger...
  • Page 22: Heat Exchanger Scheme

    Boiler Design General Information 4.6 Heat Exchanger Scheme A diagram showing flue gas flow in the exchanger first heat exchange water output 50°C water input water output water input 30°C flue gas after water condensation burner 40 °C condensation partition condensate condensate outlet flue gas after the first heat exchange...
  • Page 23: Installation

    condensation partition Installation condensate condensate outlet flue gas after the first heat exchange flue gas after the second heat exchange gorące spaliny gazu hot flue gas 5 Installation 5.1 Delivery And Accessory Fig. №. 8 A diagram showing flue gas flow in the exchanger The K4 boiler is delivered as assembled on a pallet, packed in a carton cover.
  • Page 24: Operation

    Operation User 6 Operation Boiler Attendance by the User 6.1 Control Panel Description of the control panel CH setpoint adjustment (+) CH setpoint adjustment (-) Info mode selection RESET mode OFF / DHW / CH+DHW modes enabling DHW setpoint adjustment (-) DHW setpoint adjustment (+) 7 segments digit 7 segments digit...
  • Page 25: Modes Of Operation

    Operation 6.2 Modes Of Operation The controller has a number of operation modes: The priority of operating modes is fixed as follows: Error/fault mode • OFF mode, heat demands are ignored except for CH and DHW frost protection calling Test or Installer mode •...
  • Page 26 Operation Burner Ignition In case of valid heat demand request, ignition sequence will be started. In case of failed ignition, controller will try to reignite for a defined number of times. At the first ignition trial, the burner will ignite with fan speed set by Ignition fan speed value. As soon as the flame presence is validated, fan speed moves according to the heat demand type.
  • Page 27: Lockout Condition Codes

    Operation By pressing pushbutton twice, it is possible to see following information: First time – PT1000 temperature (solar sensor temperature), if sensor is not connected, LCD shows --- Second time – OTC temperature, if sensor is not connected, LCD shows --- Value stays on the LCD for 5 sec.
  • Page 28 Operation Lockout signal after the ‚no flame‘ and all ignition trials are expired. This error stops the boiler. To return to normal operation again, manual/remote reset is required. If the flame signal is measured with no current heat demand, error 2 is displayed. This error stops the boiler.
  • Page 29: Blocking Codes

    Operation 6.4 Blocking Codes Temporary blocking condition is given with the capital „F“ on the status display and error code on the temperature display: The boiler controller recognizes also the fault situations that can block the heat demands but do not lead to lockout condition.
  • Page 30 Operation The low water pressure error can be caused by insufficient water pressure (lower than ‚Water pressure low limit‘ or water pressure switch contact is open). In error mode, the heat demand and the supply pump are switched off. Heat demands are ignored. Diverting 3WV is moved in CH position (if it is not already there).
  • Page 31: Additional Functions, 6.6 Open Therm Communication

    Operation 6.5 Additional Functions 6.5.1 LCD Symbols Test If the boiler is connected to the power supply, all functioning LCD symbols will light up. 6.5.2 Air Purge Function While this function is active, the heat demand is switched off and the fan will start at maximum RPM (see ‚Maximum absolute Fan speed parameter‘) for 120 seconds.
  • Page 32: Installer Mode

    Operation Installer Mode By pressing for 10 seconds, it is possible to enter the Installer mode. reset By pressing for 1 second, it is possible to leave Installer mode. LCD starts showing: “tS” flashing. By means of the push buttons is possible to select from the following menu: means “Transparent parameter”...
  • Page 33 Operation 6.7.2 ‚In‘ As Inquiry Mode When selecting ‚In‘ on the display, the mode starts by showing ‚i00‘. By means of the push buttons it is possible to select the parameters. Selecting one of these parameters, by means of the push buttons it is possible to see his value (not flashing;...
  • Page 34: Maintenance

    Operation, Maintenance By pressing for 1 second, it is possible to return to the ‚Hi‘ list. After that, by pressing reset once again, exit from the History Mode. reset By pressing for 1 second it is possible to leave the Installer mode. If no action has been taken, the display automatically leaves this mode after 2 minutes.
  • Page 35: Installation

    Installation 8 Installation The heating system must be filled with water meeting the following requirements and especially the water hardness must not exceed the required parameters. Hardness mmol/l mmol/l Concentration of total Fe + Mn mg/l (0.3)* *) recommended value EN 15502-2-1 Gas-fired central heating boilers.
  • Page 36: Possible Placement, 8.2 Boiler Installation

    Installation 8.1 Possible Placement The boiler placement must comply with the project documentation. The flue gas connection must comply with the valid regulations. Ports of individual pipes for supply of combustion air and dischar- ge of flue gases must be located in such a way that they are located inside a square with a side of 50 cm by the boiler.
  • Page 37 Installation Fig. №. 11 Mounting bracket, connecting dimensions K4G1HXXXX – Boiler connections, bottom view of the boiler NOTICE: The manufacturer recommends installing water filter to the heating system. Fig. №. 11 Mounting bracket, connecting dimensions … heating water outlet 3/4" NOTICE: The manufacturer recommends installing water filter to the heating system.
  • Page 38: Connection To The Heating System And Water Filling, 8.4 Gas Connection

    Installation 8.3 Connection To The Heating System And Water Filling Water for filling the boiler and the heating system must be clear and colorless, with no suspended sub- stances, oil and chemically aggressive substances. The parameters of circulation and refilling water must meet the table on page 36.
  • Page 39: Flue Gas Ducting, 8.8 Boiler Electrical Wiring

    Installation nal or regional (local) regulations. The drain pipe inclination must be at least 5° from the boiler to the sewerage and must not be blocked in any way (when the condensate drain pipe is blocked, the boiler furnace will resonate). 8.7 Flue Gas Ducting See chapter 9 –...
  • Page 40 Installation Servicing Servicing 8.8.3 Connecting terminal 10.9.3 Connecting terminal Servicing K4G1HXXXX with heating of water for the system only VIADRUS K4G1HXXXX with heating of water for the system only 10.9.3 Connecting terminal Connection of the connection terminal of Room thermostat connection: Parent control connection –...
  • Page 41 Installation Servicing Boiler Wiring Diagram (Extra-Low Voltage) Fig. №. 20 Boiler wiring diagram (extra-low voltage) Changes in models reserved. Dimensions not binding!
  • Page 42 Installation Boiler Electrical Equipment Wiring Diagram (Extra-Low Voltage) Servicing black blue brown white purple orange yellow green gnye green-yellow Panel with LCD screen Heating water sensor DHW sensor Pump Water pressure sensor External sensor Water flow sensor Room instrument OPENTHERM Gas valve Room thermostat Upper storage tank sensor...
  • Page 43 Installation Boiler Wiring Diagram (Low Voltage) Servicing Changes in models reserved. Fig. №. 22 Boiler wiring diagram (low voltage) Dimensions not binding!
  • Page 44 Installation Servicing Boiler Electrical Equipment Wiring Diagram (Low Voltage) Power mains 230VAC, black Panel with LCD screen blue Fan, brown Pump, gnye green-yellow Three-way valve, Ignition and Ionization electrode, External sensor, Gas valve Euro connector – the boiler power supply Fig.
  • Page 45: Flue Gas Ducting

    The boiler shall be installed together with the necessary accessories (pipeline for the combustion air supply and flue gas exhaust). The approved and recommended flue ducting versions for the VIADRUS K4 boiler made by ALMEVA are as follows: • Star D80mm •...
  • Page 46 The design of both ducts, including their lengths, must be made by the designer in the technical documentation on the basis of design documentation provided by STREBEL. Note: The quantity of the components for the individual version types depends on the placement of the boiler.
  • Page 47: Flue Gas Ducting Examples, 9.2 Starr D80 And Flex 80 System Connection

    Flue Gas Ducting Servicing 9.1 Flue Gas Ducting Examples Servicing Servicing 11.1 Flue gas ducting – examples of correct connection of flue duct and air supply 11.1 11.1 Correct: Flue gas ducting – examples of correct connection of flue duct and air supply Flue gas ducting –...
  • Page 48 Flue Gas Ducting Servicing 11.3.1 STARR, 2 x D 80 mm flue ducting diagram 9.2.1 STARR, 2 x D 80 mm Flue Ducting Diagram Plastic chimney capital starr (complete set) Rain-protection collar Terminal pipe without socket Universal distance clamp Pipe with socket Inspection T-piece Inspection door Pipe with socket...
  • Page 49 Flue Gas Ducting Servicing 11.3.2 FLEX, 2 x D 80 mm flue ducting diagram 9.2.2 FLEX, 2 x D 80 mm Flue Ducting Diagram Rain-protection collar Terminal pipe without socket Option 1 Option 2 Terminal pipe flex Plastic chimney capital flex (complete set) Plastic chimney capital starr (complete set)
  • Page 50: Ik 60/100, 80/125 System Connection

    Flue Gas Ducting Servicing 9.3 IK 60/100, 80/125 System Connection 11.4 LIK 60/100, 80/125 system connection For connection of the LIK 80/125 system it is necessary to use a 60/100 reducer piece Servicing measuring piece blinding plug D80 11.4 LIK 60/100, 80/125 system connection For connection of the LIK 80/125 system it is necessary to us exchanger reducer piece reducer piece...
  • Page 51 Flue Gas Ducting 9.3.1 Flue Gas Ducting LIK Type – 60/100 mm (max. length 5 m), or 80/125 The design of the flue gas and air supply ducts, including their lengths, must be made by the desig- Servicing ner in the technical documentation. Note: The quantity of the components for individual heating systems depends on the 11.4.1 Diagram for flue gas ducting of the LIK type, version 60/100 mm (max.
  • Page 52: Pressure Losses Of Chimney Flue Elements

    Flue Gas Ducting 9.4 Pressure Losses Of Chimney Flue Elements Maximal pressure of fan 150 Pa Multi-piece Chimney Flue – Burnt Gases K4GXH24XX K4GXH33XX Code Name Loss in Pa PPSB48 Angle piece 45° PPSB98 Angle piece 87° PPRM18 Tube 1 m PPSAS8 Chimney plastic head –...
  • Page 53: Commissioning

    Commissioning 10 Commissioning The entire installation must comply with local regulations that are applicable for this equipment. The boiler must be compatible with the local connecting conditions (checking the parameters of the boiler with the information on the name plate). The boiler can only be commissioned by organisations that are authorized and trained for this purpose by the manufacturer.
  • Page 54: Instructions Before Putting Into Operation

    Commissioning Servicing 10.1 Instructions Before Putting Into Operation 12.1 Instructions before Putting into Operation Expansion tank filling valve. Pressure in the expansion tank shall be set according to the heating system designing documentation. Pressure in the expansion tank shall be checked during the regular annual servicing inspection.
  • Page 55: Boiler Setting

    Commissioning 10.2 Boiler Setting Boiler emissions: Natural gas: – minimum/nominal boiler output CO value – 8.5% Propane: – minimum/nominal boiler output CO value – 9.5% When the set parameters do not correspond with the values shown above, follow the instructions in the Servicing Manual.
  • Page 56: Fuel Conversion, 10.4 Electronics Setting

    Commissioning Servicing 10.3 Fuel Conversion 12.3 Conversion to a different type of fuel 1. Venturi tube 2. Clamp 3. Diaphragm 4. Ring 5. Gas supply 6. Gas valve Depending on the fuel type the connection between the gas supply (5) and the Venturi tube (1) is equipped with a diaphragm (3) Natural gas: diaphragm diameter 6.7 mm Propane: diaphragm diameter 4.3 mm Note 3: Sealing...
  • Page 57 Commissioning K4GXH24X - Honeywell electronics parameters set in the factory (service parameters list neXsys S4962V3224) Param. Name Range Unit Setting (Nat. Gas models) Setting (Propane models) K4G1.. K4G2.. K4G3.. K4G1.. K4G2.. K4G3.. DHW configuration 1=Instantaneous 2=Instantaneous + Solar 3=Storage tank num.
  • Page 58 Commissioning K4GXH33X - Honeywell electronics parameters set in the factory (service parameters list neXsys S4962V3224) Param. Name Range Unit Setting (Nat. Gas models) Setting (Propane models) K4G1.. K4G2.. K4G3.. K4G1.. K4G2.. K4G3.. DHW configuration 1=Instantaneous 2=Instantaneous + Solar 3=Storage tank num.
  • Page 59: Servicing

    Servicing 11 Servicing The user is obliged ensure regular annual servicing inspections of the boiler. When these conditions are not observed the owner cannot clam warranty repairs. The instructions for the servicing inspection procedure is available for servicing organisations. Servicing Main points of the inspection: Check if liquids are leaking from the boiler‘s joints;...
  • Page 60 Servicing Informations For The Customer Packaging identification PE Plastic sacks, folie, corrugated board, iron and plastic fix line Identification of principal materials used. Paper, Polyethylene, iron, wood Part 1: Summary of assessment Standard/Report Assessment requirement Claim Note 1.1 Prevention by source reduction 1.2 Heavy metals and ensure below maximum permitted levels for components...
  • Page 61: Instructions For Disposal After Service Life

    Instructions For Disposal 12 Instructions For Disposal After Service Life Packaging of this product is in compliance with EN 13427. We recommend disposing the packaging in the following way: plastic foils, carton cover, use the Scrap Materials the wood base is intended for single using and it cannot be further reused. Its disposal is subjected to Act No.
  • Page 62: Annex

    Annex Annex to the Warranty Certificate for the Customer – User A record of warranty and after-warranty repairs and regular annual product inspections performed Contracted service Date of Customer’s Activity performed organization (signature, entry signature stamp) Changes in models reserved. Dimensions not binding!
  • Page 63 Notes Changes in models reserved. Dimensions not binding!
  • Page 64 Strebel Ltd. www.strebel.co.uk Read more on Unit 10, Invincible Road, Farnborough, Hampshire, GU14 7QU UNITED KINGDOM Phone +44 (0) 1276 685 422 +44 (0) 1276 685 405 Mail info@strebel.co.uk NAK, 1117...

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