Ferroli Domitop HF 24-30 E Technical Manual
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Ferroli Domitop HF 24-30 E Technical Manual

Wall-mounting gas boiler
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Supplied by HeatingSpares247.com
•
Wall-Mounting Gas
Boiler
•
Airtight Chamber,
Heating
TECHNICAL
MANUAL
EDITION
09ï2002

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Summary of Contents for Ferroli Domitop HF 24-30 E

  • Page 1 Supplied by HeatingSpares247.com • Wall-Mounting Gas Boiler • Airtight Chamber, Heating TECHNICAL MANUAL EDITION 09ï2002...

  • Page 2: Table Of Contents

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 1. Technical characteristics and data ............3 1.1 Introduction ......................3 1.2 Dimensions and connections .................. 4 1.3 General view and main components ............... 8 1.4 Technical data table ....................

  • Page 3: Technical Characteristics And Data

    • Before carrying out any cleaning or maintenance operation, disconnect the unit from the electrical power supply using the switch and/or the special cut-off devices. Certification The CE marking demonstrates that Ferroli gas units conform to the requirements contained in the applicable European directives. In particular, this unit complies with the following EU directives: •...

  • Page 4: Dimensions And Connections

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 1.2 Dimensions and connections Domitop HF 24 E version Top view 100 25 CONNECTIONS AXIS System delivery Gas inlet System return System filler inlet Bottom view Version - 09.2002...
  • Page 5 Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Ferella Gold HF 24 MEL version Top view Top view System delivery Gas inlet System return Bottom view System filler inlet Version - 09.2002...
  • Page 6 Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Domitop HF 30 E version Top view Ø80 Ø80 Ø80 System delivery Gas inlet System return Bottom view System filler inlet Version - 09.2002...
  • Page 7 Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Ferella Gold HF 30 MEL version Top view System delivery Gas inlet System return Bottom view System filler inlet Version - 09.2002...

  • Page 8: General View And Main Components

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 1.3 General view and main components HF 24 E/MEL version 29 187 Airtight chamber Inlet System delivery System return Safety valve Combustion chamber Burner assembly Main nozzle Burner Combustion chamber insulation...
  • Page 9 Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL HF 30 E/MEL version 29 187 Airtight chamber Inlet System delivery System return Safety valve Combustion chamber Burner assembly Main nozzle Burner Combustion chamber insulation Copper exchanger Fume manifold Fume outlet manifold...

  • Page 10: Technical Data Table

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 1.4 Technical data table 24 KW 30 KW DOMITOP - FERELLA GOLD Powers Pmax Pmin Pmax Pmin 25.8 11.2 33.1 14.5 Heating Power (Net Heat Value - Hi) kcal/h 22,200 9,900...

  • Page 11: Product Framework And Internal Components

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 2. PRODUCT FRAMEWORK AND INTERNAL COMPONENTS 2.1 Hydraulic circuit – heating Hydraulic diagram for heating When there is a call for heat, the room thermostat or control system make the burners ignite and the circulation pump come into operation.
  • Page 12 Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Circulator (230v/50Hz) Located on the heating circuit return, it is connected directly to the exchanger via special forks and connected to the system via a threaded brass section. It has three delivery/head levels (see diagram).

  • Page 13: Expansion Tank

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Expansion tank It is connected to the pump casing via a pipe with a fork connection. On the 24kW version, it is located above the pump, while on the 30kW version it is located behind the exchanger, inside the frame.

  • Page 14: Hydraulic Unit

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Hydraulic unit This is a single piece of brass to which the exchanger delivery is connected for ease of access. It accommodates a number of safety and adjustment components.

  • Page 15: Hydraulic Circuit - Tap Water Via External Boiler

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 2.2 Hydraulic circuit - tap water via external boiler Hydraulic diagram for tap water The HF is a boiler for heating only. However, if required, the HF has a special kit for connecting the boiler for tap water, too, via an external boiler.
  • Page 16 Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Electrical and plumbing connections The terminal block for the electrical connections is designed for hooking up the diverter valve and the sensor. It is necessary to take out the 1.8 KOhm resistor on the probe connection whose job was to simulate a virtual, always-satisfied boiler.

  • Page 17: Gas Circuit

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 2.3 Gas circuit Gas circuit diagram 29-187 Airtight chamber Inlet System delivery System return Safety valve Burner assembly Fume outlet manifold Heating circulator Heating temp. sensor Air pressure switch Gas valve Safety thermostat...

  • Page 18: Gas Valve

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Gas valve It supplies gas to the nozzles between a minimum and maximum pressure. For the valve to work correctly, it is necessary for the pressure upstream from it to be stable and suited to the type of gas being used, while the valve will supply a regular pressure to the nozzles.
  • Page 19 Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Adjusting burner pressure Since this unit has flame modulation, there are two fixed pressure settings: the minimum and maximum, which must be as stated in the technical data chart according to the type of gas. •...
  • Page 20 Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Gas supply conversion The unit can function with either Natural Gas or LPG and is factory-set for use with one of the two gases, as clearly shown on the packing and on the unit’s dataplate.

  • Page 21: Burner Unit

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 2.4 Burner unit Operation The burner unit comprises a manifold and 12/16 nozzles (depending on the capacity), the burner mount, electrodes and the burner assembly. Manifold - nozzles The valve sends gas at a suitable pressure to the manifold, which homogeneously distributes the gas to the single burner stages at the nozzles.

  • Page 22: Burner Assembly

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Detection electrode Made of the same material as the ignition electrode, it is set 11 mm from the burner head. Combustion causes the flame atmosphere to ionize, making it conductive.

  • Page 23: Fume Circuit

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 2.5 Fume circuit Fume deflector and manifold All forced-flow boilers have a fume deflector above the exchanger whose main task is to make the secondary air crossing the burners uniform, making the flame homogeneous and stable.

  • Page 24: Air Pressure Switch

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Air pressure switch This is used to check whether the fumes are adequately evacuated. The pressure switch compares the static and dynamic signals coming from the pressure test points on the fan according to the figure. The pressure switch is connected to the card and is normally open (see diagram).

  • Page 25: Fume Ducts

    The current standards and local regulations must be observed. This C-type unit must be installed using the fume exhaust and suction ducts supplied by FERROLI S.p.A. in accordance with UNI-CIG 7129/92. Failure to use them automatically forfeits all warranty and liability of FERROLI S.p.A.
  • Page 26 Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Calculation example Here we give an example of the calculation for a separate fume outlet. We recommend inserting a condensate trap on long vertical sections to prevent condensation getting onto the burner and damaging it.

  • Page 27: Electrical Circuit

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 2.6 Electrical circuit Electrical terminal board Follow the instructions given in the figure to access the electrical connection terminal board. The layout of the terminals for the various connections is given in the wiring diagram. Wiring diagram JP03 230V...

  • Page 28: Safety Thermostat

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Main electronic card The electronic card is a Honeywell PMF03: part of the card works on low voltage (24V) and the remainder on 230V (see diagram) and it is fitted with a fuse (2A).
  • Page 29 Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Heating temperature probe These are NTC sensors that increase their resistance as the temperature decreases and are connected directly to the main card X4-24V(12-13). The sensor performs the antifreeze function too.

  • Page 30: Operation

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 3. OPERATION 3.1 Operating principle When there is a call for heating, the circulator and fan start working; then the air pressure switch enables the control and safety unit to ignite the burner.

  • Page 31: Operating Diagram

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 3.2 Operating diagram Winter • System pressure > 0.8 bar: LED 5 not blinking • Room thermostat, heating potentiometer on call: LED 4 on •...

  • Page 32: Control Panel

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 3.3 Control panel RESET °C Table 1 ITEM DESCRIPTION OFF/ON/RESET switch Burner on Heating temperature Shutdown setting Standby for heating (blinking light) Water gauge Heating required (steady light) Boiler temp.

  • Page 33: Operating Parameter Adjustment

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 3.5 Operating parameter adjustment Boiler parameter adjustment Temperature adjustment potentiometer. Controls the heating delivery temperature from 30°C to 85°C. The minimum position selects “Summer” operation. Heating capacity adjustment potentiometer.

  • Page 34: Troubleshooting

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL 4. Troubleshooting Flow Diagram 1 Checking Electric Power Supply - System Pressure and Antifreeze Protection First of all, check the following points • The gas cock is open •...

  • Page 35: Flow Diagram

    Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Flow Diagram 2 Checking Heating Operation Is the relay Set the temperature for Does the circulator turn? RY 101 closed? heating to maximum Proceed with Check and if Check the electrical Make sure the room...
  • Page 36 Supplied by HeatingSpares247.com DOMITOP HF 24 - 30 E FERELLA GOLD HF 24 - 30 MEL Flow Diagram 4 Checking ignition Is LED1 on? LED2 (shutdown) comes Is there an ignition spark? on without the boiler lighting Proceed with Does the burner ignite? diagram 4 Check and if necessary change Is LED2 come on...
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  • Page 40 Supplied by HeatingSpares247.com 37047 SAN BONIFACIO - VR - ITALY tel. 045/6139411 - tlx 480172 fax 045/6100233-6100933 cod. 354M007/0...

This manual is also suitable for:

Ferella gold hf 24-30 mel

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