Ferroli BLUEHELIX TECH RRT 28 C Instructions For Use, Installation And Maintenence
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Ferroli BLUEHELIX TECH RRT 28 C Instructions For Use, Installation And Maintenence

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BLUEHELIX TECH RRT 28 C
INSTRUCTIONS FOR USE, INSTALLATION AND MAINTENANCE
GC No 47-267-72

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Karen
February 10, 2025

What is a blinking F on display stands for?

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Mr. Anderson
May 14, 2025

A blinking "F" on the display of a Ferroli RRT 28 C indicates a temporary fault (anomaly) that will automatically reset once the value returns to normal operating conditions.

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Summary of Contents for Ferroli BLUEHELIX TECH RRT 28 C

  • Page 1 BLUEHELIX TECH RRT 28 C INSTRUCTIONS FOR USE, INSTALLATION AND MAINTENANCE GC No 47-267-72...
  • Page 2 BLUEHELIX TECH RRT 28 C • Read the warnings in this instruction bo- nuine parts. Failure to comply with the abo- oklet carefully since they provide important ve can compromise the safety of the unit. information on safe installation, use and •...

  • Page 3: Table Of Contents

    BLUEHELIX TECH RRT 28 C 1 Operating instructions ......................4 1.1 Introduction............................. 4 1.2 Control panel ............................4 1.3 Connection to the power supply, switching on and off ................5 1.4 Adjustments............................6 2 Installation ..........................10 2.1 General Instructions ..........................10 2.2 Place of installation ..........................

  • Page 4: Operating Instructions

    1.1 Introduction Dear Customer, BLUEHELIX TECH RRT 28 C is a high-efficiency, low emissions premix condensing heat generator with a stainless steel heat exchanger and incorporated DHW production, using natural gas or LPG and equipped with a microprocessor control system.

  • Page 5: Connection To The Power Supply, Switching On And Off

    BLUEHELIX TECH RRT 28 C Comfort A Comfort demand (reinstatement of temperature inside the boiler) is indicated by flashing of the Comfort symbol. The display (detail 12 - fig. 1) shows the actual temperature of the water within the boiler.

  • Page 6: Adjustments

    BLUEHELIX TECH RRT 28 C When the boiler is turned off, the printed circuit board is still powered. Domestic hot water and heating are disabled. The frost protection system remains activat- ed. To operate the boiler normally, press the winter/ summer/off button (detail 7 - fig.
  • Page 7 BLUEHELIX TECH RRT 28 C DHW temperature adjustment Use the DHW buttons (detail 1 and 2 - fig. 1) to adjust the temperature from a min. of 40°C to a max. of 55°C. If a small amount of water is drawn and/or...
  • Page 8 BLUEHELIX TECH RRT 28 C Press the reset button (detail 6 - fig. 1) again for 5 seconds to exit the "OTC" menu. If the room temperature is lower than the required value, it is advisable to set a higher value curve and vice versa. Pro- ceed by increasing or decreasing in steps of one and check the result in the room before any further adjustments.

  • Page 9: Installation

    BLUEHELIX TECH RRT 28 C 2. Installation 2.1 General Instructions This unit must only be used for its intended purpose. This unit is designed to heat water to a temperature below boiling point and must be connected to a heating system and/or a water supply system for domestic use, com- patible with its performance, characteristics and heating capacity.

  • Page 10: Place Of Installation

    BLUEHELIX TECH RRT 28 C 2.2 Place of installation The combustion circuit is sealed with respect to the place of installation and therefore the unit can be in- stalled in any room. However, the place of installation must be sufficiently ventilated to prevent the creation of dangerous conditions in case of even slight gas leaks.
  • Page 11 BLUEHELIX TECH RRT 28 C Typical System By-pass layout Hot water Cold water mains Additional expansion vessel C.H. (if required) Filling Automatic point C.H. Bypass fig. 18 The automatic by-pass must be installed a least 3 metres from the boiler & set to allow a minimum of 6 ltr/min through the valve when all TRV's are closed.
  • Page 12 BLUEHELIX TECH RRT 28 C Isolation valve kit The isolation valves supplied (see fig. 20) must be installed between the boiler and heating system to allow the boiler to be isolated from the system if necessary. Heating Flow 3/4” (22mm with isolation valve fitted) DHW outlet elbow 1/2”...

  • Page 13: Gas Connection

    BLUEHELIX TECH RRT 28 C System water characteristics BLUEHELIX TECH RRT 28 C boilers are suitable for sealed systems only. The water within a heating system must have the characteristics required by UNI 8065, and comply with laws and reg- ulations in force and the provisions of EN14868 (protection of metallic materials against corrosion).
  • Page 14 NOTE - The terminals 14 &15 are 230v Live & Neutral to power an external clock if required (Optional extra). Ferroli OpenTherm RF Smart Control (option) part number Y87RFC2124 should be connected to terminals 5 & 6 (see 139 fig. 22 below) It does not require a 230v connection...
  • Page 15 BLUEHELIX TECH RRT 28 C 2.6 Flue ducts THE BOILER MUST BE INSTALLED IN PLACES THAT MEET THE FUNDAMENTAL REQUIREMENTS FOR VENTILATION. OTHERWISE THERE IS A DANGER OF SUFFOCATION OR INTOXICATION. READ THE INSTALLATION AND MAINTENANCE INSTRUCTIONS BEFORE INSTALLING THE UNIT.
  • Page 16 BLUEHELIX TECH RRT 28 C Connection with 80mm Twin pipes fig. 25- Examples of connection with Twin pipe system ( = Air / = Fumes) Table. 3 - Examples & Classification Type Description Wall horizontal exhaust and intake. The inlet/outlet terminals must be together on the same wall to ensure they are in the same pressure zone.
  • Page 17 IMPORTANT- THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATION FOR COMBUSTION PURPOSES If the boiler is to be connected BLUEHELIX TECH RRT 28 C to a collective flue or to a single flue with natural draught, the flue or chimney must be expressly designed by professionally qualified technical personnel in conformity with the current regulations and be suitable for room sealed fan assisted boilers.
  • Page 18 BLUEHELIX TECH RRT 28 C Position of terminals D, E fig. 28 Minimum dimensions of fume exhaust terminals Directly under an opening, air inlet, openable window, etc. 300 mm Above an opening, air inlet, openable window, etc. 300 mm Horizontally to an opening, air inlet, openable window, etc.

  • Page 19: Condensate Drain Connection

    BLUEHELIX TECH RRT 28 C 2.7 Condensate drain connection IMPORTANT The boiler has an internal trap for draining condensate. Install the push on hose “B” & sediment bowl before commis- sioning, the boiler fill the trap with approx. 0.5 L of water and connect the hose to a solvent welded waste system. For safety reasons the hose must form a tight seal into the waste system.
  • Page 20 BLUEHELIX TECH RRT 28 C Condensate drain (Please follow BS 6798 or Industry Guidance for Installers on Condensate pipe Installation) The condensate should be run inside as far as is practicably possible. For that purpose, use a pipe of at least 22 mm diameter and a trap with flexible connection supplied with the unit to facilitate connection of the condensate drain pipe.

  • Page 21: Service And Maintenance

    BLUEHELIX TECH RRT 28 C 3. Service and maintenance ALL ADJUSTMENTS DESCRIBED IN THIS CHAPTER CAN ONLY BE CARRIED OUT BY SUITABLY QUAL- IFIED PERSONNEL REGISTERED WITH GAS SAFE IN THE APPROPRIATE CATEGORY . 3.1 Adjustments Gas conversion The unit can work with 2...
  • Page 22 BLUEHELIX TECH RRT 28 C Table. 7- THROTTLE position and parameter setting Gas family Gas type Throttle position Parameter setting fig. 32 fig. 31 Checking the combustion values MAKE SURE THE FRONT CASING IS CLOSED AND THE FLUE SYSTEM IS CORRECTLY ASSEMBLED & IN- STALLED TO THE CURRENT REGULATIONS.
  • Page 23 BLUEHELIX TECH RRT 28 C 100% calibration IMPORTANT: DURING THE AUTOMATIC CALIBRATION PROCESS OF THE CO2 VALUE, THE FRONT CASING OF THE BOILER MUST BE CLOSED AND THE CHIMNEY / FLUE SYSTEM CORRECTLY ASSEMBLED & IN- STALLED TO THE CURRENT REGULATIONS.
  • Page 24 BLUEHELIX TECH RRT 28 C TEST mode activation Perform a heating or DHW demand. Press the heating buttons (detail 3 and 4 - fig. 1) together for 5 seconds to activate TEST mode. The boiler lights at Ignition rate & the ramps up to maximum heating power set, as described in the following section.
  • Page 25 BLUEHELIX TECH RRT 28 C Service menu ONLY FERROLI TRAINED PERSONNEL CAN ACCESS THE SERVICE MENU AND MODIFY PARAMETERS. The PCB Service Menu is accessed by pressing the Reset button for 10 seconds. The display will show: "100" and the message "co" flashing.
  • Page 26 BLUEHELIX TECH RRT 28 C Contents Description Range Default 0=Deactivated, 1=Enabled (Only for versions with Fault 20 status selection 0=Deactivated pressure sensor) Comfort burner on time (b01=1) 0-40 seconds 15 seconds Not implemented (b01=2) Not implemented (b01=3) Not implemented (b01=4)
  • Page 27 BLUEHELIX TECH RRT 28 C Contents Description Range Default Pump operation 0-3 = Operation strategy Modulating pump min. speed 30-100% Modulating pump start speed 90-100% Modulating pump max. speed 90-100% 100% Pump deactivation temperature during Post-Circu- 0-100°C 50°C lation (b01=1) Pump deactivation temperature during Post-Circu- 0-100°C...
  • Page 28 BLUEHELIX TECH RRT 28 C Contents Description Range Default Comfort2 standby time (b01=1) 0-100minutes 42minutes Not implemented (b01=2) Not implemented (b01=3) Not implemented (b01=4) Solar deactivation temperature (b01=1) 0-100°C 10°C Setpoint deltaT (b01=2) 0-20°C 0°C Solar deactivation temperature (b01=3) 0-100°C 10°C...
  • Page 29 BLUEHELIX TECH RRT 28 C "Sc" - Combustion Control Parameters Menu ONLY FERROLI TRAINER & QUALIFIED PERSONNEL CAN ACCESS THE "SC" MENU TO MODIFY THE RELE- VANT PARAMETERS. Press the Heating buttons to scroll the list of parameters “+“ increasing “-“ decreasing order. Press the DHW buttons to view or modify the value of a parameter.
  • Page 30 BLUEHELIX TECH RRT 28 C Procedure for modifying parameter SC12: • Create a demand for heating or DHW and then press the reset button (ref. 6 fig. 1) for 10 seconds. • The display shows 100 and the text ”Co” flashing; press the "Heating +" button (ref. 4 fig. 1) until 120 is displayed.
  • Page 31 BLUEHELIX TECH RRT 28 C “In” - Information Menu 12 views of information are available. Press the Heating buttons to scroll the list of information in increasing or decreasing order. Press the DHW buttons to display the value. Contents Description Range NTC Heating sensor (°C)

  • Page 32: Commissioning

    BLUEHELIX TECH RRT 28 C 3.2 Commissioning Before lighting the boiler • Check the tightness of the gas system & rectify any leaks before continuing. • Check the correct expansion vessel pressure (1.0 bar with no system pressure). • Fill the hydraulic system and make sure that all air contained in the boiler and the system has been vented.

  • Page 33: Maintenance

    BLUEHELIX TECH RRT 28 C 3.3 Maintenance IMPORTANT ALL MAINTENANCE WORK AND REPLACEMENT OF PARTS MUST BE CARRIED OUT BY SUITABLY QUALIFIED PERSONNEL WHO ARE GAS SAFE REGISTERED IN THE RELEVANT CATAGORY. Before carrying out any operation inside the boiler, disconnect the power supply and close the gas isolation valve upstream of the boiler.
  • Page 34 BLUEHELIX TECH RRT 28 C Annual Boiler Service To ensure the safe operation of the unit over time, a qualified Gas Safe registered engineer must carry out a yearly inspection, and complete the following checks: • The control and safety devices (gas valve, flow meter, thermostats, etc.) must operate correctly.
  • Page 35 BLUEHELIX TECH RRT 28 C Plate heat exchanger Before carrying out the following instructions it is advisable to protect the area and the boiler’s PCB housing against accidental water spillage. fig. 38- Plate to plate heat exchanger replacement/maintenance • Isolate the power supply to the boiler.
  • Page 36 BLUEHELIX TECH RRT 28 C Replacing the main exchanger Before carrying out the following instructions it is advisable to protect the area and the boiler’s PCB housing against accidental water spillage. fig. 42- Main exchanger • Isolate the power supply and close the Gas isolation valve to the boiler.
  • Page 37 BLUEHELIX TECH RRT 28 C Disassembling the burner and cleaning the exchanger 3.5 mm fig. 43 • Isolate the power supply and close the Gas isolation valve to the boiler. • Undo the 5 x 10mm flange nuts securing the exchanger cover "1".
  • Page 38 BLUEHELIX TECH RRT 28 C Exchanger insulation replacement • Isolate the power supply and close the Gas isolation valve to the boiler. • Remove the cover of the heat exchanger and the burner (see fig. 43 Removing the burner and cleaning the heat exchanger).
  • Page 39 BLUEHELIX TECH RRT 28 C Replacing the circuit board fig. 45 • Isolate the power supply and close the Gas isolation valve to the boiler. • After lowering the PCB housing, lift the cover by pulling the tabs open “2”.
  • Page 40 BLUEHELIX TECH RRT 28 C Removing the diverter valve motor head Before carrying out the following instructions it is advisable to protect the area and the boiler’s PCB housing against accidental water spillage. fig. 47 • Isolate the power supply and close the Gas isolation valve to the boiler.
  • Page 41 BLUEHELIX TECH RRT 28 C Cleaning or replacing the flowmeter Before carrying out the following instructions it is advisable to protect the area and the boiler’s PCB housing against accidental water spillage. 1 - Flow-rate limiter 2 - Impeller 3 - Filter...

  • Page 42: Troubleshooting

    BLUEHELIX TECH RRT 28 C 3.4 Troubleshooting Diagnostics Blank LCD Make sure that the PCB is powered: using a digital multimeter, check supply volt- age is within tolerance ( Range 195 – 253 Vac ) In the case of no voltage, check the wiring & check the external 3amp fuse.
  • Page 43 BLUEHELIX TECH RRT 28 C Fault code Table Table. 8- List of faults Fault code Fault Possible cause Cure Check for correct gas flow & pressure to the No gas boiler and that the pipework has been purged. Check the wiring of the electrode and that it is Ignition/detection electrode fault correctly positioned and free of any deposits;...
  • Page 44 BLUEHELIX TECH RRT 28 C Fault code Fault Possible cause Cure Flue extraction duct safety device Fault F07 generated 3 times in the See fault F07 intervention last 24 hours Supply voltage under 170V Electric mains trouble Check the electrical system...

  • Page 45: Technical Data And Characteristics

    BLUEHELIX TECH RRT 28 C 4. Technical data and characteristics 4.1 Dimensions and connections fig. 53- Front view fig. 54- Side view fig. 56- Bottom view fig. 55- Top view Gas inlet - Ø 3/4” (22mm with Isolation valve fitted) DHW outlet - Ø...

  • Page 46: General View

    BLUEHELIX TECH RRT 28 C 4.2 General view Pressure relief valve Heating circulating Erp pump Heating temperature sensor Automatic air vent DHW temperature probe Gas valve Expansion vessel Ionisation/ignition electrode Diverter valve Low water pressure switch Flowmeter System pressure gauge...

  • Page 47: Technical Data Table

    BLUEHELIX TECH RRT 28 C 4.4 Technical data table Table. 9- Technical data table Data Unit BLUEHELIX TECH RRT 28 C PRODUCT IDENTIFICATION CODES 0T3B2AGA COUNTRIES OF DESTINATION GAS CATEGORY II2H3+ (GB) Max. heating capacity 24,5 Min. heating capacity Max. Heat Output in heating (80/60°C) 24,0 Min.
  • Page 48 BLUEHELIX TECH RRT 28 C cod. 354M1070 - Rev. 01 - 07/2018...

  • Page 49: Diagrams

    BLUEHELIX TECH RRT 28 C 4.5 Diagrams Residual head available for system BLUEHELIX TECH RRT 28 C Q (m3/h) fig. 59- Residual head available for system 4.6 Wiring diagram Heating circulating pump Heating temperature sensor DHW temperature sensor Gas valve...
  • Page 50 BLUEHELIX TECH RRT 28 C X08-10 X08-11 GROUND X01-1 X01-2 X04-3 X07-1 X07-2 X04-5 X04-7 X04-6 X08-14 X08-12 X08-13 X08-8 X08-9 X05-1 X05-2 X05-3 X05-4 X01-4 X01-7 X01-6 X01-5 X01-3 X03-1 X03-2 X08-6 X08-7 X08-4 X08-5 X08-1 X08-2 fig. 60- Wiring diagram Attention: Remove the jumper on the terminal block before connecting the room thermostat or the remote timer control.
  • Page 51 BLUEHELIX TECH RRT 28 C Benchmark Commissioning and Servicing Section www.centralheating.co.uk cod. 354M1070 - Rev. 01 - 07/2018 © Heating and Hotwater Industry Council (HHIC)
  • Page 52 GAS BOILER SYSTEM COMMISSIONING CHECKLIST BLUEHELIX TECH RRT 28 C This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference.
  • Page 53 SERVICE RECORD It is that your heating system is serviced BLUEHELIX TECH RRT 28 C and that the appropriate Service Interval Record is completed. Service Provider SERVICE 01 SERVICE 02 ² % ² % ² % ² % SERVICE 03 SERVICE 04 ²...
  • Page 56 BLUEHELIX TECH RRT 28 C Before contacting Ferroli please have available the completed BENCHMARK document (located in the back of this manual), boiler serial number and model detail. For Technical assistance during the installation, call our Technical Helpline on 0 You will be required to provide your Gas Safe Register Number.

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