Robur K18 Hybrigas Installation, Use And Maintenance Manual
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Robur K18 Hybrigas Installation, Use And Maintenance Manual

Hybrid system with gas absorption heat pump and condensing boiler for heating and buffer tank domestic hot water production
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Installation, Use and Maintenance
Manual
K18 Hybrigas
Hybrid system with gas absorption heat pump and
condensing boiler for heating and buffer tank domestic hot
water production
nominal thermal power 37,9 kW
nominal thermal power for DHW 37,9 kW

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  • Page 1 Installation, Use and Maintenance Manual K18 Hybrigas Hybrid system with gas absorption heat pump and condensing boiler for heating and buffer tank domestic hot water production nominal thermal power 37,9 kW nominal thermal power for DHW 37,9 kW...
  • Page 2 The rights of those who have legitimately filed the registered trademarks contained within this publication are not affected. With the aim of continuously improving the quality of its products, Robur S.p.A. reserves the right to modify the data and contents of this...

  • Page 3: Table Of Contents

    Combustion products exhaust ........ p. 32 3.10 ..................... p. 57 Flue gas condensate discharge ........ p. 33 3.11 Appendices ................p. 58 Defrosting water drainage ......... p. 34 3.12 Product fiche..............p. 58 4 Electrical installer .............. p. 34 Warnings ................p. 34 Installation, use and maintenance manual – K18 Hybrigas...

  • Page 4: Iintroduction

    CONTROL DEVICE In order to work, the K18 Hybrigas unit requires a control device RECIPIENTS to be connected by the installer (see Paragraph 1.8  p. 21 ). This Manual is intended for: SYMBOLS AND DEFINITIONS II.1...
  • Page 5 Proper maintenance assures the efficiency and good op- eration of the appliance over time. „ Disconnect the electrical power supply before any work/ „ Maintenance must be performed according to the procedure on appliance components. Installation, use and maintenance manual – K18 Hybrigas...

  • Page 6: Iii.2 Conformity

    Warnings III.3 EXCLUSIONS OF LIABILITY AND manufacturer's instructions (see Chapter 7  p.  51 ) and in compliance with current regulations. WARRANTY „ Appliance maintenance and repairs may only be entrust- ed to firms legally authorised to work on gas appliances Any contractual or extra-contractual liability of the man- and systems.

  • Page 7: Features And Technical Data

    Features and technical data FEATURES AND TECHNICAL DATA The K18 Hybrigas is composed by a K18 heat pump module and based on the type of service provided: A. Systems for space heating only; by a condensing boiler module. B. Systems for space heating and DHW production (Domestic Hot Water).
  • Page 8 (auxiliary ▶ automatic air purging valve; boiler) that compose the K18 Hybrigas unit, to be managed as ▶ high efficiency modulating water pump; optimally as possible in order to provide the best performance ▶...
  • Page 9 (just like in the integration ▶ mode, with the addition that in particular environmental conditions, the heat pump can be deactivated and only the auxiliary boiler operates, scenarios A and E). Installation, use and maintenance manual – K18 Hybrigas...

  • Page 10: Dimensions

    Features and technical data DIMENSIONS Figure 1.3   Dimensions K18 Hybrigas 1452 1421 1448 Front panel interface keys Left panel Boiler reset/unlock button Electrical connection input Heat pump display transparent cover, which can be detached to access Heat pump flue gas exhaust outlet Ø 80 mm the user interface keys Flue gas condensate and defrosting water drain Ø...

  • Page 11: Connection Plate Detail

    Features and technical data CONNECTION PLATE DETAIL Figure 1.4   Connection plate detail Water outlet connection Ø 3/4" M Water inlet connection Ø 3/4" M Boiler module safety valve discharge pipe passage Gas connection Ø 3/4" M Installation, use and maintenance manual – K18 Hybrigas...

  • Page 12: Components

    Features and technical data COMPONENTS Figure 1.5   LH front view Heat pump module Boiler module...
  • Page 13 TA outdoor temperature probe Flame sensing / ignition electrodes Teva evaporator temperature probe PT1000 flue exhaust temperature probe Heat pump module delivery temperature probe Limit thermostat Components box Defrosting valve Circulation pump Installation, use and maintenance manual – K18 Hybrigas...
  • Page 14 Features and technical data Figure 1.7   Heat pump module internal components rear view Safety valve Water outlet connection Ø 3/4" M Flowmeter Water inlet connection Ø 3/4" M Heat pump module flue gas exhaust Return temperature probe Condensate discharge 120 °C flue gas thermostat Condensate level sensor...
  • Page 15 Features and technical data Figure 1.8   RH front view heat pump module internal components Gas valve TG generator temperature probe Combustion blower Electrical panel Ignition transformer TGV probe Oil pump Installation, use and maintenance manual – K18 Hybrigas...
  • Page 16 Features and technical data Figure 1.9   LH side view Boiler module flue gas exhaust outlet Heat pump module flue gas exhaust outlet Socket for boiler flue gas analisys Boiler module combustion air inlet...
  • Page 17 Figure 1.10   Detail of water pipes connection between boiler module and connection plate Heating water outlet pipe Heating water inlet pipe Gas pipe Space heating water delivery temperature probe Boiler module safety valve drain ducting pipe (to be fitted by the installer) Installation, use and maintenance manual – K18 Hybrigas...

  • Page 18: Electrical Wiring Diagram

    Features and technical data ELECTRICAL WIRING DIAGRAM Figure 1.11   Heat pump module wiring diagram GHP10 electronic board Manual flue gas thermostat Ambient air temperature sensor CNTBOX Flame controller Generator limit thermostat Generator temperature sensor Blower Flowmeter TEVA Evaporator outlet temperature Water pump Condensate water sensor sensor Oil pump...
  • Page 19 Gas valve temperature probe Orange Control panel terminal block Yellow Ignition transformer Transistor Line White System return probe Neutral Grey Safety thermostat Black Green Pacq Water pressure switch gi-ve Green-yellow Blower Blue Installation, use and maintenance manual – K18 Hybrigas...

  • Page 20: Electronic Board

    Features and technical data Figure 1.13   Detail of connection between heat pump module electrical panel and boiler module electrical panel Heat pump module electric panel Boiler module electric panel ELECTRONIC BOARD The appliance is monitored and programmed by interacting with the display and selection keys (Figure 1.14  p. 20 ). The The appliance's electrical panel contains: display is accessible from the right side of the unit (detail I Electronic Board GHP10 with microprocessor, it controls the...

  • Page 21: Operation Mode

    The OCDS007 chronothermostat is able to control a single (2) OCDS007 ambient chronothermostat (optional) ▶ K18 Hybrigas unit. In this case the water setpoint is either fixed (3) external request ▶ or based on weather compensation, with a single heating curve which is directly controlled by the K18 Hybrigas unit;...

  • Page 22: Technical Characteristics

    Using a commercially available device it is generally not possible electronic board please refer to Paragraph 4.4  p. 35 . TECHNICAL CHARACTERISTICS Following K18 Hybrigas technical data apply also to K18 Hybrigas EVO, unless otherwise expressly specified. Table 1.2   K18 Hybrigas 37/2 technical data K18 Hybrigas 37/2 Heating mode medium-temperature application (55 °C)
  • Page 23 Sound pressure values in free field, with directionality factor 2, obtained from the sound power value in compliance with standard EN ISO 9614. Sound power Lw 65 dB(A) at maximum ventilation, 62 dB(A) at minimum ventilation; sound power values detected in compliance with the intensity measurement methodology set forth by standard EN ISO 9614. Table 1.3   Heat pump for K18 Hybrigas technical data K18 Simplygas C1 Heating mode nominal (1013 mbar - 15 °C)

  • Page 24: Transport And Positioning

    Transport and positioning K18 Hybrigas Boiler methane G20 (nominal) m³/h 1,90 Gas consumption G30 (nominal) kg/h 1,42 G31 (nominal) kg/h 1,40 9,44 Nominal thermal capacity 11,10 10,20 Percentage CO in fumes 9,04 Minimal thermal capacity 10,50 10,05 Flue temperature Nominal thermal capacity °C...

  • Page 25: Appliance Positioning

    In order to work correctly, the appliance needs clean air. Defrosting water drainage In winter, it is normal for frost to form on the finned coil and for the appliance to perform defrosting cycles. Installation, use and maintenance manual – K18 Hybrigas...

  • Page 26: Mounting Base

    ▶ hydraulic separation: in the first case the water pump managed A capacity of 80/100 liters is usually adequate. by the K18 Hybrigas unit ensures water circulation also for the...

  • Page 27: Hydraulic Diagrams

    (optional supplied as per standard with OQLT019, to circuit (see Paragraph 3.2.4.3  p. 28 ) be placed, preferably, in a heated room) 3-way diverting valve for heating/DHW management (available as gas connection Installation, use and maintenance manual – K18 Hybrigas...
  • Page 28 Heating engineer 3.2.4.3 Heating distribution Direct heating distribution with single zone (system with primary water circuit only). Figure 3.3   Heating distribution 01 - direct GHP immersion temperature probe (standard) connection to K18 unit (GHP plant water temperature probe) radiator Heating distribution with two zones controlled by 2-way valves (system with primary water circuit only). Figure 3.4  ...
  • Page 29 K18 unit (heating service request). See system controller manual outdoor temperature probe connection DHW buffer tank immersion tempera- ture probe connection (if present) DHW/space heating 3-way diverter valve connection (if present) Installation, use and maintenance manual – K18 Hybrigas...

  • Page 30: Hydraulic Connections

    Size the piping, circulation pump and ▶ thermal generators accordingly. The K18 Hybrigas appliance is equipped with remote With automatic system water filling, a periodic check of the ▶ temperature probe (GHP), to be installed by the installer glycol content is required.

  • Page 31: System Water Quality

    1. Slightly loosen the cap of the jolly valve on the circulating pump of the boiler module (at the bottom left inside the boiler module) to release the air (detail 1 Figure 3.7  p. 31 ). Installation, use and maintenance manual – K18 Hybrigas...

  • Page 32: Boiler Safety Valve Drain Ducting Connection

    Non compliant gas pressure (Table 3.3  p.  32 ) may M connection of the boiler module connection plate (detail damage the appliance and be hazardous. V Figure 1.10  p.  17 ), which will cross the K18 Hybrigas unit Table 3.3   Gas network pressure Gas supply pressure...

  • Page 33: Flue Gas Condensate Discharge

    (detail C Figure 1.9  p. 16 ). The two distinct flue gas exhaust ducts can be conveyed sepa- For the design of any unified flue for the modules of K18 Hybrigas rately or via a unified flue.

  • Page 34: Defrosting Water Drainage

    Electrical installer Flue gas condensate discharge manifold exhaust, which are not harmful either for machine oper- ation or for the materials used for condensate exhaust. To make the condensate drain manifolds: Size the ducts for maximum capacity (maximum condensa- ▶ tion and defrosting water flow rate) (Table 1.2 ...

  • Page 35: Electrical Power Supply

    ▶ the wiring terminals and liquid penetration (at least the OQLT019 controller (optional) protection index IP 25 declared for the unit must be (System (1) see also Paragraph 1.8  p. 21 ) guaranteed). Installation, use and maintenance manual – K18 Hybrigas...
  • Page 36 Electrical installer How to connect the OQLT019 controller Figure 4.3   Connection diagram (Request signal) to OCDS007 chronothermostat Connection of OQLT019 controller is made on the wiring terminal block located in the Electrical Panel inside the unit. 1. Access the Electrical Board of the appliance according to the Procedure 4.2 ...

  • Page 37: Alarm Indicator Lamp

    (see detail S Figure 1.10  p. 17 ). The error reset for the heat pump module of the K18 Hybrigas The probe is only used in this position in case of distribution with unit may be remoted by connecting a dedicated button to the only primary water circuit in the absence of the buffer tank (see Figures 3.3 ...

  • Page 38: First Start-Up

    2 x 0.75 mm² up to 60 m 2 x 1.0 mm² up to 80 m 2 x 1.5 mm² up to 120 m Connect the shield to a ground terminal on the K18 Hybrigas unit's terminal block FIRST START-UP...

  • Page 39: Heat Pump Combustion Parameters Check

    If the required CO settings cannot be reached, contact 10. Ensure the CO value is between values indicated in column Robur. "Minimal thermal capacity" of Table 5.1  p.  40 . Otherwise Installation, use and maintenance manual – K18 Hybrigas...

  • Page 40: Boiler Combustion Parameters Check

    (x = 0, 1, ..) tion by pressing the key for 5 seconds and then contact Robur. of the chimney sweep function. Figure 5.2   K18 heat pump module gas valve...

  • Page 41: Setting Parameters For Heat Pump First Start-Up

    0. not active activated 1. active Do not modify OFF drive voltage for heating circulation pump ON drive voltage for circulation pump in space heating 176 (1) from 0 V to 10 V mode Installation, use and maintenance manual – K18 Hybrigas...
  • Page 42 2. For other control systems, set parameter 47 to 1 (default). Before doing this setting, is strongly suggested contact ▶ Technical Support Robur. 5.5.2 Settings depending on glycol presence The operating mode is MODULATING by default. To set the unit...
  • Page 43 The function uses the filtered value with a constant time ment on limit thermostating condition (depending on parame- of 30' with respect to the instantaneous value as the ter 187). On the other hand, no criterion of replacement at high Installation, use and maintenance manual – K18 Hybrigas...

  • Page 44: Setting Parameters For Boiler First Start-Up

    To access the parameters menu and set their values, follow the generic external request) procedure below (refer to Figure 5.4  p. 44 ): It is possible to set the K18 Hybrigas appliance to provide the 1. Press key to select the OFF mode, displayed with the space heating service using a fixed water setpoint, or a variable symbol.

  • Page 45: Settings Depending On The Primary Circuit Water Pump Type

    DHW service, by setting respectively param- eters 178 (heat pump module) and P22 (boiler module). Before doing this, it is strongly suggested to contact Robur Technical Support. To modify the lower limit of water pump flow rate, by set- ▶...

  • Page 46: Normal Operation

    6.4  p. 46 ), the display shows: OQLT019 or OCDS007 power supply (if present); ▶ first green digit on the left: indicates menu number (eg. "0.", K18 Hybrigas on, that is the boiler module display on (detail ▶ ▶ "1.", "2.", ... "8.");...

  • Page 47: Modifying Heat Pump Settings

    Furthermore, upon changing the internal room set point temperature, the curve actually used will Installation, use and maintenance manual – K18 Hybrigas...
  • Page 48 Paragraph 6.5.1  p.  47 , provides better results in from the system (water input in the appliance). The temperature terms of comfort and efficiency. Contact Robur technical is pre-set by the TAC upon First start-up Support before changing the regulation mode.

  • Page 49: Restarting A Locked-Down Unit

    3. use keys + and - of the space heating circuit (detail 1 Fig- ure 1.15  p. 21 ) to scroll through the list of displayable data. 4. To exit the Info menu press key (detail 2 Figure Installation, use and maintenance manual – K18 Hybrigas...

  • Page 50: Boiler Module Heating Temperature Setting

    Normal operation Table 6.2   List of displayable data from menu Info Info code Description Domestic hot water probe temperature Outdoor probe temperature Blower speed Not used temperature d5 - d9 Not used temperatures BOILER MODULE HEATING TEMPERATURE SETTING Do not change space heating setpoint set on the boiler during first startup.

  • Page 51: Maintenance

    (If necessary, frequency of the maintenace Check of the unit √ operation must be increased) check/restore the air pressure inside of the expansion vessel of the primary hydronic circuit √ Installation, use and maintenance manual – K18 Hybrigas...

  • Page 52: Scheduled Routine Maintenance

    For scheduled routine maintenance, perform the operations in Table 7.4  p. 52 , at least once every 2 years. Table 7.4   Scheduled routine maintenance Boiler for K18 Hybrigas Routine scheduled maintenance (to be performed at least once every TWO YEARS) clean the burner √...
  • Page 53 "E" (Exit), then press button Limit the time you use this function to the minimum ef- fectively needed. The system cancels the fan stop auto- matically after 15 minutes. Installation, use and maintenance manual – K18 Hybrigas...

  • Page 54: Diagnostics

    Diagnostics DIAGNOSTICS HEAT PUMP BOARD CODES Table 8.1   Informative codes CODES DESCRIPTION Info (I) Outdoor temperature below operational limits The code is reset automatically when the triggering condition ceases. The event indicates the activation of the protection cycle in case of high flue Generator protection cycle activated temperature.
  • Page 55 TAC. Manifold probe fault (connected to Reset is automatic when the triggering AUX 2) condition ceases. Manifold probe fault (connected to Reset is automatic when the triggering AUX 1) condition ceases. Installation, use and maintenance manual – K18 Hybrigas...

  • Page 56: Boiler Board Codes

    Diagnostics CODES DESCRIPTION Warning (u) Error (E) Check cleanliness of water filters. Check water flow. High hot water delivery temperature Reset is automatic when the triggering condition ceases. Incomplete functional parameters Contact the TAC. Invalid configuration parameters Reset is automatic when the triggering Invalid bank 1 parameters Contact the TAC.

  • Page 57: Water Pump Alarm Codes Of Heat Pump Module

    GHP10 board Installation, use and maintenance manual – K18 Hybrigas...

  • Page 58: Appendices

    Figure  Table 8 COMMISSION DELEGATED REGULATION (EU) No 811/2013 Technical parameters for heat pump space heaters and heat pump combination heaters Model(s): K18 Hybrigas Air-to-water heat pump: Water-to-water heat pump: Brine-to-water heat pump: Low-temperature heat pump: Equipped with a supplementary heater: Heat pump combination heater: Parameters shall be declared for medium-temperature application.
  • Page 59 Pdesignh , and the rated heat output of a supplementary heater Psup is equal to the supplementary capacity for heating sup(Tj) . Additional information required by COMMISSION REGULATION (EU) No 813/2013, Table 2: Emissions of nitrogen oxides: Installation, use and maintenance manual – K18 Hybrigas...
  • Page 60 Robur mission Robur is dedicated to dynamic progression in research, development and promotion of safe, environmentally-friendly, energy-efficiency products, through the commitment and caring of its employees and partners. Robur S.p.A. advanced technologies for climate conditioning via Parigi 4/6 24040 Verdellino/Zingonia (BG) Italy +39 035 888111 - F +39 035 884165 www.robur.it robur@robur.it...

This manual is also suitable for:

K18 hybrigas 37/2

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