• • Wall-Mounting Gas Boiler • Airtight Chamber, for Hot Water and Heating TECHNICAL MANUAL EDITION 09•2002 Supplied By www.heating spares.co Tel. 0161 620 6677. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 1.

DOMINA N is a wall hung boiler for central heating and instant domestic hot water production. The appliance offers the user compact dimensions, robust construction and simple operation. DOMINA C 20 N. DOMINA C 24 N. DOMINA C 28 N. DOMINA C 32 N. FORCED FLUE, ROOM SEALED. DOMINA F 20 N. DOMINA F 24 N. DOMINA F 28 N.

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..

• 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: •. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 1.2 Dimensions and connections Domina F 24 E version Top view System delivery Tap water outlet Gas inlet Tap water inlet Bottom view System return Version - 09.2002 Supplied By www.heating spares.co Tel.

• DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E Ferella F 24 MEL version & Milos Air Compact E version Top view System delivery Tap water outlet Gas inlet Tap water inlet Bottom view System return Version - 09.2002 Supplied By www.heating spares.co Tel. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E Domina F 30 E version Top view System delivery Tap water outlet Gas inlet Tap water inlet Bottom view System return Version - 09.2002 Supplied By www.heating spares.co Tel. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E Ferella F 30 MEL version Top view System delivery Tap water outlet Gas inlet Tap water inlet System return Bottom view Version - 09.2002 Supplied By www.heating spares.co Tel. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 1.3 General view and main components F 24 E/MEL version Airtight chamber Gas inlet Tap water outlet Tap water inlet System delivery System return Safety valve Combustion chamber Burner unit.

• DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E F 30 E/MEL version Airtight chamber Gas inlet Tap water outlet Tap water inlet System delivery System return Safety valve Combustion chamber Burner unit Main nozzle Burner Combustion chamber insulation. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 1.4 Technical data table Version - 09.2002 Supplied By www.heating spares.co Tel. 0161 620 6677.

• DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 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.

• DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 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). • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 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. The expansion tank contains a diaphragm in contact, on one side, with the system water and, on the other side, with the air under pressure (pre-loaded to 1 bar) inside the tank. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 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. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 2.2 Hydraulic circuit – tap water Hydraulic diagram for tap water Airtight chamber Gas inlet Tap water outlet Tap water inlet System delivery System return Safety valve Burner unit Heat exchanger. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E Flow meter Located at the cold water inlet, its task is to provide the card with a signal at a frequency (7 Hz per litre) in direct proportion to the tap-water flow rate.

Tancuyuschie devushki na rabochij stol programma 2. It is composed of a body (stator) and a rotor inside it. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 2.3 Gas circuit Gas circuit diagram Airtight chamber Gas inlet Tap water outlet Tap water inlet System delivery System return Safety valve Burner unit Heat exchanger Fume outlet collar Heating circulator.

• DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 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. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 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. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 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. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E 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. • DOMINA F 24 - 30 E FERELLA F 24 - 30 MEL MILOS AIR COMPACT E Detection electrode Made of the same material as the ignition electrode, it is set 11 mm from the burner head.