Wall hung boilers Unica 28 HE

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Adolfo Rossetti
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1 Wall hung boilers Unica 28 HE MODEL PART NUMBER MTN GPL Unica 28 HE (90) (9) UK Cod.E28 Rev. 3.0 (09/203)

2 FRAME, FRONT PANEL, CASE Drawing

3 FRAME, FRONT PANEL, CASE Drawing POS. DESCRIPTION 28 Frame R Pressure gauge R Cover assembly R Printed circuit board Led light guide R Front panel R Knob assembly R Case Assembly Door panel R Cover assembly R Tdc 80 bs 362 3a fuse R Clip R Wiring harness R Wiring harness R Wiring harness R

4 HYDRAULIC COMPONENTS Drawing ORANGE LABEL COMPACT VERSION FIRST VERSION 4

5 HYDRAULIC COMPONENTS Drawing 2 POS. DESCRIPTION 28 Exchanger R Connection R Water pressure switch R Non return valve R By-pass casing R By-pass valve R way heating manifold and cartridge (first version) R Distribution Header (compact version) way heating manifold and cartridge (orange label) R way valve cartridge (first version) R Distribution Header (compact version) way valve cartridge (orange label) R Actuator (first version) R Actuator (compact version) Actuator (orange label) Clip R Clip (first version) R Clip (compact version) Clip (orange label) R Safety valve Flow governor R Flow governor R Flow governor R Pipe R Dhw actuator R Heating cock R Connection R Cock R Insulator Cock R Flexible pipe R Pipe R Cover for by-pass assembly R Cock R Non return valve R Cock R Pipe R Washer R Washer R Washer R Ring R Clip R Nut R Nut R Clip R Clip R Clip R Nipple R Fitting/union R Clip R O ring R Washer R Clip R O ring R O ring R Washer R NTC sensor R Wiring harness (first version) R Wiring harness

6 HYDRAULIC COMPONENTS 2 Drawing FIRST VERSION

7 HYDRAULIC COMPONENTS 2 Drawing 3 POS. DESCRIPTION 28 Expansion vessel R Pipe R Pump R Air vent bottle R Pipe R Pipe R Pipe Pipe R Air venting plug (first version) R Air venting plug Siphon R Condensing pipe R Flexible pipe R Condensing pipe R Pipe (first version) R Pipe Drain tap R Cock R Washer R Washer R Washer R High limit thermostat R O ring R Clip R Clip R Clip R O ring R Split pin R Washer R Ntc sensor Air venting plug kit Pipe Pipe Clip

8 BURNER Drawing

9 BURNER Drawing 4 POS. DESCRIPTION 28 Roomsealed chamber R Side R Fan R Burner R Spark / ignition electrode R Condense electrode R Gas pipe R Gas valve Gas valve solenoid /4" gas cock R Cover for air box R Glass stopper assembly R Plug Air gas conveyor R Gas pipe R Gas diaphragm R Gas diaphragm R22 67 Washer R Flange and insulation Tryton Mixer Flame detection electrode R Fan protection Washer R O ring R Washer R Trasformer Wiring harness R Wiring harness (gas valve) Spark electrode cable R N.g. conversion kit R Lpg conversion kit R Clip

10 COMBUSTION COMPONENTS Drawing

11 COMBUSTION COMPONENTS Drawing 5 POS. DESCRIPTION 28 Condensing exchanger assembly R Conveyor Flue drain connection R Nut screw R Flange Burner flange Bracket-kit Ring closing Insulation panel Tryton retarder Container exchanger Washer Outlet heat exch.seal gasket R Washer Inlet heat exch.seal gasket R Washer Ø 60 R Washer Ø 60 R High limit Combustion cable R Tube sealant

Rev. data Descrizione.0 2/03/07 Modifiche varie 2.0 22/0/08 E002007022 : scheda 3.

12 Rev. data Descrizione.0 2/03/07 Modifiche varie /0/08 E : scheda 3.0 6/04/08 E : cablaggi, trasformatore, termostato fumi E : cambiato disegno convogliatore scarico fumi /09/08 E : sonda a contatto E : protezione ventilatore 5.0 2/0/09 E : coibente E : nuovo brand Vokera E : mixer /0/200 E : rampa degasatore E : tappo scatola aria /02/200 E : gruppo distribuzione zero brass /0/200 E : molletta pompa Correaione posizione cablaggi idraulico /04/20 Inserito tryton scambiatore condensante inserito degasatore circolatore 0.0 3/05/20 E : gruppo idraulico ibrido E : valvola gas E : nuova bobina valvola gas.0 20/2/20 E : valvola sicurezza 3 bar E : Flangia e isolante bruciatore 2 03/07/202 Gestione componenti scambiatore condensante E : scheda gestione /09/203 Aggiunte clip scatola aria Vokera reserve the right to change the specifications without prior notice. Consumers statutory rights are not affected.

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