Daikin ROTEX GW-20 H12 Installation Instructions Manual
  1. Manuals
  2. Brands
  3. Daikin Manuals
  4. Boiler
  5. ROTEX GW-20 H12
  6. Installation instructions manual

Daikin ROTEX GW-20 H12 Installation Instructions Manual

Wall-mounted gas condensing boiler
Hide thumbs Also See for ROTEX GW-20 H12:
Table of Contents

Advertisement

Quick Links

Download this manual

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the ROTEX GW-20 H12 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Daikin ROTEX GW-20 H12

Summary of Contents for Daikin ROTEX GW-20 H12

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Safety instructions Unit description General ......................................6 Functioning ...................................... 6 Operating modes ..................................... 6 PC Interface ....................................8 Test programs ....................................8 Main components Accessories ....................................10 Installation Installation measurements ................................11 Installation space ................................... 13 Assembly ....................................... 14 Connecting Connecting CH installation ................................
  • Page 3 These installation instructions With these installation instructions, you can safely assemble, install and maintain the unit. Carefully follow the instructions. In case of any doubt, please contact the manufacturer. Keep the installation instructions near the unit. Abbreviations and terms used Description To be referred to as Rotex RHOB12AAV1 H, RHOB18AAV1 H,...

  • Page 4: Safety Instructions

    Service and technical support for the installer For information about specific settings, installation, maintenance and repair work, as an installer, please contact your local Rotex dealer. Identification of the product You will find the unit details on the type plate on the bottom of the unit. You will find the unit details on the data plate on the bottom of the unit.

  • Page 5: Unit Description

    UNIT DESCRIPTION General The Rotex RHOB*A*V1H wall-mounted gas boiler is a closed unit. The unit is intended to provide heat to the water of a CH-installation and the domestic hot water installation. The air supply and combustible gas outlet can be connected to the unit by means of two separate pipes.
  • Page 6 Ventilating When the unit is started, the fan is first brought up to its correct start rpm. When the start rpm is reached, the boiler controller will be ignited. Code is also visible when there is post-fanning after the boiler controller is stopped. Igniting When the fan has reached the start rpm, the burner relay will be ignited by means of electrical sparks.

  • Page 7: Pc Interface

    Tap water operation RHOB*A*V1H in combination with indirectly fired tank The hot water supply takes precedence over the heating. When a tank sensor is used, any CH request will be interrupted when the tank sensor detects a temperature of 5 degrees lower than the set value. After the fan has switched on (code ) and there has been an ignition (code ), the boiler controller will switch to domestic water...

  • Page 8: Main Components

    MAIN COMPONENTS 0207010009 CH pump Flue gas/air inlet concentric adapter Gas valve Air supply (only when using twin pipe flue system) Burner controller (incl. operating panel) Connection block / terminal strip X4 Sensor S1 (flow) Condensate collector Sensor S2 (return) Siphon Heat exchanger Pressure sensor central heating...

  • Page 9: Accessories

    Accessories Description Article numbers B-pack small EKFJS*AA B-pack middle EKFJM*AA B-pack large EKFJL*AA Valve kit EKVK4AA Cover plate EKCP1AA Outdoor sensor EKOSK1AA 3-way valve set EK3WV1AA Flue gas adapter Concentric Ø 80x125 EKHY090717 Flue gas adapter Parallel 80 mm EKHY090707 Propane conversion set RHOB12AAV1 H EKPS075917 Propane conversion set RHOB18AAV1 H...

  • Page 10: Installation

    INSTALLATION Installation measurements Unit with pipes connected downwards: Unit + mounting bracket Supply CH G ¾” (ext) Return CH G ¾” (ext) G ½” (int) Condense outlet Ø dn25 (flexible) 517mm RHOB12AAV1 H & RHOB18AAV1 H 637mm RHOB42AAV1H 590mm RHOB12AAV1 H & RHOB18AAV1 H 710mm RHOB42AAV1H...
  • Page 11 Unit connected to B-pack: Unit + B-pack Supply CH G ¾” (ext) Return CH G ¾” (ext) G ½” (int) Condense outlet Ø dn25 (flexible) 770mm RHOB12AAV1 H & RHOB18AAV1 H 890mm RHOB42AAV1H Flue gas outlet/air inlet Ø60/100 (concentric) 50 130 020601006...

  • Page 12: Installation Space

    Installation space The unit must be installed against a wall with sufficient load bearing capacity. In case of light wall constructions, there is a risk of resonance noises. Within 1 meter of the unit, there must be an earthed wall plug. In order to prevent the condense outlet from freezing, the unit must be installed in a frost-free room.

  • Page 13: Assembly

    Assembly The boiler can be hung to the wall using : the wall suspension strip and a the connection kit EKVK4AA • a B-pack including an expension vessel and a connection kit. • 4.3.1 Assembling suspension strip and assembly bracket Make sure the construction of the wall is suitable for hanging the boiler.
  • Page 14 4.3.3 Assembling the unit Unpack the unit. Check the content of the packaging, which consists of: • Unit (A) • Suspension strip (B) • Siphon + flexible hose (C) • Installation instructions • Operating instructions • Warranty card Check the unit for any damage: immediately report damages to the supplier. Install the suspension strip.

  • Page 15: Connecting

    CONNECTING Connecting CH installation Rinse the CH installation carefully. Fit the supply pipe (A) and return pipe (B) to the connection set. All pipes must be assembled with no electrical current, in order to prevent shocks from the pipes. Existing connections may not be rotated, in order to prevent leakages. The CH installation must be fitted with: A filling/draining tap (A) in the return pipe, immediately underneath the unit.
  • Page 16 5.1.2 Dividing CH installation in groups in case of additional heat sources Operating principle If the room thermostat switches off the boiler because another heat source (wood heater, open fire etc.) heats the room, the other rooms may cool down. This can be resolved by splitting the CH installation into two zones.

  • Page 17: Connecting Electronically

    Connecting electronically CAUTION A socket with safety ground must be no further than 1 meter from the unit. The socket must be easily accessible. When installing the unit in a damp space, a fixed connection is obligatory, by means of an all-pole main switch with a minimum contact gap of 3 mm.

  • Page 18: Connect Room Thermostat

    Connect room thermostat 5.3.1 Room thermostat on/off 1. Connect the room thermostat (see par. 10.2). 2. If necessary, set the feedback resistance of the room thermostat to 0.1 A. If unsure, measure the electrical current and set it accordingly. The maximum resistance of the thermostat pipe and the room thermostat amounts to a total of 15 Ohm.

  • Page 19: Connecting Gas

    Undo the appointment of an RF room thermostat to the CH boiler. Press the reset button of the unit for approximately 5 seconds to • access the RF room thermostat menu of the CH boiler. Press the service button 2x. On the display above the button, a •...

  • Page 20: 5.5 Flue And Air Supply Duct

    5.5 Flue and air supply duct For the installation of the flue and air supply duct material, see the manual included with the materials. Contact the manufacturer of the relevant flue and air supply duct materials for extensive technical information and specific assembly instructions.

  • Page 21: Outlet Systems

    Outlet systems Please note that not all flue gas configurations described below are permitted in all countries. Therefore observe local regulations prior to installation. The drawings above are a sample and can differ on details. Explanation flue systems Category in accordance to CE A flue that evacuates the products of combustion to the outside of Make sure the air inlet is open the room containing the appliance.

  • Page 22: Flue Material

    Flue material The following flue materials can be ordered at Rotex. Also visit the website: fluegas.Rotex.eu Art.no. Description EKFGP2978 Wall Terminal Kit PP/GLV 60/100 EKFGP4651 Extension PP/GLV 60/100 x 500mm EKFGP4652 Extension PP/GLV 60/100 x 1000mm EKFGP4660 Elbow PP/GLV 60/100 90° EKFGP4661 Elbow PP/GLV 60/100 45°...
  • Page 23 Art.no. Description EKFGP4651 Extension PP/GLV 60/100 x 500mm EKFGP4652 Extension PP/GLV 60/100 x 1000mm EKFGP6837 Roof Terminal PP/GLV 60/100 AR460 EKFGW4085 Elbow PP 80 90° EKFGW4086 Elbow PP 80 45° EKFGV1102 Chimney Conection Set 60/100 Air Intake Dn.80 C53 EKFGP4660 Elbow PP/GLV 60/100 90°...

  • Page 24: Connection To A Flue System Without Air Inlet (B23, B33)

    Connection to a flue system without air inlet (B23, B33) CAUTION Make sure the boiler room complies to the regulatory • requirements for connecting to a flue system in accordance to B23 or B33 When connection the boiler to a flue system in •...

  • Page 25: 5.9 Connection To A Sealed Flue System

    5.9 Connection to a sealed flue system. 5.9.1 Pipe lengths As the resistance of the flue tube and air supply pipes increases, the power of the unit will decrease. The maximum permitted power reduction is 5%. The resistance of the air supply and the combustible gas outlet depends on the length, diameter and all components of the pipe system.
  • Page 26 5.9.3 Permitted pipe lengths at parallel air supply and flue tube systems Permitted pipe lengths when applying Ø80 mm (total of flue pipe and air intake pipe together). RHOB12AAV1 H 100 m 100 m 100 m 100 m 100 m RHOB18AAV1 H 100 m 100 m...
  • Page 27 5.9.4 Free in the market available flue gas materials (C63). The properties of the combustion determine the choices for the flue material. The flue materials need to be CE approved and provided with the CE marking. The standards EN 1443 and EN 1856-1 provide the necessary information for choosing the flow material by means of a sticker including an identification string.
  • Page 28 5.9.5 Securing the flue system IMPORTANT These regulations are typical for both concentric and parallel flue • systems. The flue system must be secured to a solid structure. • The flue system should have a continuous fall back to the boiler (1.5° to •...
  • Page 30 5.9.6 Air supply from the facade and a roof outlet with communal exhaust system Unit category: C83 An air supply from the facade and a roof outlet with communal exhaust system is permitted. IMPORTANT • The air supply in the facade must be fitted with an inlet roster (A).
  • Page 31 5.9.7 Combined flue outlet/air inlet system Unit category : C43 IMPORTANT A roof outlet through a Combination Air Supply-combustion gas • outlet system is permitted. For the communal combustion gas outlet hood and air supply • hood, a declaration of no objection or a Gas certificate from the Gastec Gas institute is required.
  • Page 32 5.9.8 Concentric horizontal flue gas outlet, vertical part air-surrounded by shaft Unit category : C93 A flue tube system according to C93 (C33) is permitted when using CE approved flue material or the flue material provided by Rotex. The ponts below have to be considered. General Flue outlet in shaft with 60 or 80 mm diameter (rigid or flexible).

  • Page 33: Commissioning The Unit And The Installation

    COMMISSIONING THE UNIT AND THE INSTALLATION Filling and air purge of unit and installation 6.1.1 CH system Insert the unit's plug into a socket. The unit may carry out a self-check: (on service display). The unit will then go into the off setting: (on service display) and the CH pressure is shown on the temperature display.

  • Page 34: Commissioning The Unit

    Commissioning the unit Reading Operating On/off On/off button CH operation or setting maximum CH temperature Tap/CH button to set the required temperature Tap operation or setting tap temperature - button Required temperature CH or tap water in °C / pressure CH water in bar / malfunction code + button Tap comfort function eco (n/a for RHOB*A*V1H units) Tap comfort function off / eco / on (n/a for RHOB*A*V1H units)

  • Page 35: Switching Off The Unit

    Switching off the unit CAUTION Drain the unit and the installation, if the mains electricity supply is interrupted and there is a risk of freezing. Remove the plug from the socket. Drain the unit with the filling/draining tap. Drain the installation at the lowest point. Shut the main tap for the water supply from the hot water section.

  • Page 36: Setting And Adjustment

    SETTING AND ADJUSTMENT The functioning of the unit can be influenced by means of the (parameter) settings in the boiler controller. Part of this can be configured directly via the operating panel, another part can only be adjusted by means of the installers code. Direct via operating panel The following functions can be operated directly.

  • Page 37: Parameter Settings Via The Service Code

    Resetting Check the nature of the malfunction on the basis of the malfunction codes under par. 8.1 and if possible, resolve the cause of the malfunction before resetting the unit. If a locking malfunction is indicated by means of a flashing LED above the button and a number on the display, the unit can be restarted by pressing the reset...
  • Page 38 Booster Not applicable Step-by-step modulation 0= step-by-step modulation off during CH operation 1= step-by-step modulation on during CH operation 2= Power control by Open Therm room thermostat enabled Minimum rpm CH Settings reach 20 – 50% Activation external power saving switch Setting range 0,15 –...

  • Page 39: Setting Maximum Ch Power

    Setting maximum CH power The maximum CH power is set to 70% in the factory. If more power is required for the CH installation, the maximum CH power can be changed by adjusting the rpm of the fan. See table: Setting CH power. This table shows the relation between the rpm of the fan and the unit power.

  • Page 40: Weather Dependent Regulation

    Weather dependent regulation When connecting an outdoor sensor, the leaving water temperature is automatically regulated dependent on the outdoor temperature, in accordance with the set fuel line. The maximum leaving water temperature (T max) is set via the display. If so desired, the fuel line can be changed by using the service code (see par.7.3).

  • Page 41: Conversion To Different Type Of Gas

    Conversion to different type of gas CAUTION Work on gas carrying parts may only be carried out by a certified installer. If a unit is connected to a different type of gas than the one it has been set to by the manufacturer, the gas dosing ring must be replaced.

  • Page 42: Setting Gas/Air Regulation

    Setting gas/air regulation The CO setting has been set at the factory and does not require any adjustments, in principle. The setting can be checked by measuring the CO percentage in the combustion gases. In case of any disturbance of the setting, the replacement of the gas valve or the conversion to a different type of gas must be checked, and if necessary set in accordance with the following instructions.
  • Page 43 CAUTION Work on gas carrying parts may ONLY be carried out by qualified, competent individuals. Adjusting the carbon dioxide setting IMPORTANT Only adjust the CO setting when you have first checked it and you have made sure the adjustment is necessary. No adjustments may be made to the gas valve without prior permission from your local Rotex distributor.

  • Page 44: Malfunctions

    MALFUNCTIONS Show last malfunction Use the key to switch the unit off, and press the button. The red malfunction LED is lit continuously, and the latest fault code is shown flashing on the temperature display. If the unit has never detected a locking malfunction, no code will be displayed. The last locking malfunction can be deleted by briefly pressing the button while pressing the button.

  • Page 45: Other Faults

    Other faults 8.3.1 Boiler controller is noisy when igniting Possible causes: Solution: Gas supply pressure too high. The home pressure controller may be faulty. Contact the energy company. Check the ignition pin distance. Incorrect ignition distance. Replace the ignition pin. Gas/air regulation not correctly configured.
  • Page 46 8.3.4 The power is reduced Possible causes: Solution: At a high level of rpm, the power has decreased Check the unit, siphon and output system for contamination. by more than 5%. Clean unit, siphon and output system. 8.3.5 CH is not reaching correct temperature Possible causes: Solution: Water pressure in installation is too low...
  • Page 47 8.3.9 A-label pump LED flashes intermittently red/green Possible causes: Solution: Too high or too low mains voltage. Check the mains voltage. Pump temperature is too high. Check the water and ambient temperature. 8.3.10 A-label pump LED flashes red Possible causes: Solution: Reset the pump by switching off the unit by pressing the on/off button for at least 20 seconds...

  • Page 48: Maintenance

    MAINTENANCE The unit and the installation must be checked by a certified installer, and cleaned if necessary. CAUTION Work on gas carrying parts may only be carried out by a certified installer. After work, check the flue gas carrying parts for air tightness. If the unit has just been operational, some parts may be hot.
  • Page 49 9.1.3 Fitting During maintenance the seal front plate needs to be replaced. When assembling, check the other seals for damages, hardening, (hairline) fractures and/or discoloration. Where necessary, place a new seal. Also check the correct positioning. If retarders are not fitted, or incorrectly fitted, it may lead to serious damage.

  • Page 50: Technical Specifications

    TECHNICAL SPECIFICATIONS Model name RHOB12AAV1 H RHOB18AAV1 H RHOB42AAV1 H Condensing boiler Low temperature boiler B1 boiler Combination heater Nom. load upper value, Qn (Hs) 3,9 – 13,1 6,2 – 20,8 8,7 – 47,2 Nom. load lower value, Qn (Hi) 3,5 –...

  • Page 51: Technical Product Fiche In Accordance To Celex-32013R0811

    10.1 Technical Product Fiche in accordance to CELEX-32013R0811 Supplier Rotex Heating Systems GmbH Langewiesenstraße 10 D-74363 Güglingen Type designation RHOB12AAV1 H RHOB28AAV1 H RHOB42AAV1 H Seasonal space heating energy efficiency class Heat rated output rated Annual energy consumption Seasonal space heating energy efficiency η...

  • Page 52: Ntc Resistances

    10.2 NTC resistances NTC 12k Ohm T [°C] R [ohm] T [°C] R [ohm] T [°C] R [ohm] T [°C] R [ohm] 76020 18300 5522 1994 58880 14770 4609 1717 45950 12000 3863 1467 36130 9805 3253 1266 28600 8055 2752 1096 22800...

  • Page 53: Electrical Diagram

    10.3 Electrical diagram Earth connection exchanger Fuse (3.15 A T) CH pump Ignition cap Gas block + ignition module Boiler controller Ignition/ionization pin Flow temperature sensor Earth connections Mains electricity supply Return temperature sensor 3.15AT Connector X4 PWM control CH-pump. (5= PWM signal (red), E=earth) 24V= On/off room thermostat and/or frost thermostat...

  • Page 54: Warranty Conditions

    WARRANTY CONDITIONS The general warranty conditions of Rotex Heating Systems GmbH apply to this product. The warranty is void if it is determined that the faults, damages, or undue wear are attributable to improper use or inexpert treatment or inexpert repair, setting, installation or maintenance, by non-certified installers, or that it was exposed to substances with aggressive chemicals (incl.

This manual is also suitable for:

Rotex gw-20 h18Rotex gw-20 h42

Table of Contents