Related Manuals for Immergas EOLO Mini
Summary of Contents for Immergas EOLO Mini
- Page 1 EOLO Mini 24-28 kW Special Compact wall-hung instantaneous boilers with sealed-room...
- Page 3 (20,640 kcal/h) and 28 kW Special (24,080 kcal/h). The supply of combustion air inside the sealed chamber and The boilers of the EOLO Mini kW Special series are type- the expulsion of fumes are ensured by a fan whose correct approved also for installation outside the building in a partly operation is controlled by a differential pressure switch.
- Page 4 Technical Documentation Technical Documentation EOLO Mini 24 kW Special main dimensions and connections. Height (mm) Width (mm) Depth (mm) Connections DOMESTIC SYSTEM WATER 3/4” 1/2” 1/2” 3/4” 3/4” Legend: G - Gas supply AC - Domestic hot water flow AF - Domestic cold water inlet R - C.h.
- Page 5 Technical Documentation Technical Documentation EOLO Mini 24 kW Special main components. Note: Coupling system (OPTIONAL) Legend: 1 - Sample point (A air) - (F flue) 13 - Combustion chamber 14 - Automatic vent valve 2 - Fan 15 - Boiler pump 3 - D.h.w.
- Page 6 Technical Documentation Technical Documentation EOLO Mini 24 kW Special main components. Note: Coupling system (OPTIONAL) Legend: 1 - Sample point (A air) - (F flue) 14 - Automatic vent valve 15 - Boiler pump 2 - Fan 16 - 3-bar safety valve 3 - D.h.w.
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Page 7: Control Panel
10 - D.h.w. temperature selector cient 11 - C.h. temperature selector 5 - Temperature LED - Malfunction - flow probe 6 - Temperature LED - Malfunction - ignition block 12 - Boiler gauge STEMkW Special ed 01/08 EOLO Mini kW Special... -
Page 8: Hydraulic Circuit
(6) which, in turn, transfers it to the water circula- ting inside thanks to the boiler circulator (15). The water is transferred directly into the system or can be STEMkW Special ed 01/08 EOLO Mini kW Special... - Page 9 The characteristic curves are shown in the following graphs. EOLO Mini 24 kW Special Flow rate (l/h) EOLO Mini 28 kW Special Flow rate (l/h)
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Page 10: Boiler Circulator
The exchangers of the 24 and 28 versions differ in the number of fins (86 in the 24 version and 103 in the 28 version) and in the different layout of the flow and return pipes (see drawing). EOLO Mini 24 kW Special Flow Return... - Page 11 (4) contrasting spring (3) is compressed (d.h.w. position). Both the spring (3) and shutter (4) are located inside the 3-way valve brass body (2). EXCHANGER FLOW D.H.W. EXCHANGER FLOW SYSTEM FLOW STEMkW Special ed 01/08 EOLO Mini kW Special...
- Page 12 When this valve triggers, water exits from the boiler return pipe. EOLO Mini 28 kW Special Expansion vessel (8). It compensates for variations in volume as a result of heating the water which also limits pressure variations.
- Page 13 In the same way, the top part of the body on the right allows the outlet of domestic hot water while at the bottom it allows primary circuit flow. Primary circuit return Primary circuit flow D.h.w. outlet STEMkW Special ed 01/08 EOLO Mini kW Special...
- Page 14 The hydraulic coupling is done using four O rings (1) so it inlet can be connected directly to the d.h.w. inlet body and to the d.h.w. outlet body. Primary D.h.w. circuit outlet return Primary circuit flow STEMkW Special ed 01/08 EOLO Mini kW Special...
- Page 15 This is a low voltage coil controlled by the integrated P.C.B.. It controls the gas valve stabiliser and allows the outlet pres- sure to be varied in a way proportionate to the DC current running through it. STEMkW Special ed 01/08 EOLO Mini kW Special...
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Page 16: Gas Settings
1 - Coil 2 - Minimum output adjustment screw 3 - Maximum output adjustment nut 4 - Gas valve outlet pressure point 5 - Gas valve inlet pressure point 6 - Protection cap STEMkW Special ed 01/08 EOLO Mini kW Special... - Page 17 (11) which, in turn, is connected to the negative pressure point of the flue pressure switch (4) and to the pressure point on the fan. The positive pressure point (10) is connected directly to the inside of the sealed chamber. STEMkW Special ed 01/08 EOLO Mini kW Special...
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Page 18: Flue Pressure Switch
Intervention pressures Flue pressure switch Head Head (mm H (mm H EOLO Mini 24-28 kW 52 (5.3) 42 (4.3) Special Fan (3). The extractor works downstream from the combustion cham- ber and is secured vertically to the top of the hood (2) from where it extracts the fumes, conveying them to the exhaust pipes to which the boiler is connected. - Page 19 Intake and outlet systems. (see the intake and outlet terminal instructions). The EOLO Mini kW Special boiler is designed for connecting the couple-on air intake/outlet pipes and can be installed indo- ors or outdoors (in a partly sheltered location) in the following...
- Page 20 (see the boiler instruction booklet). The coupling of the accessories (bends, extensions and termi- nals) is the fitted type while sealing is guaranteed by silicone lip seals. STEMkW Special ed 01/08 EOLO Mini kW Special...
- Page 21 To avoid condensate problems, the exhaust pipe is limited to tical metres. a maximum of 5 metres. NOTE: For the EOLO Mini 28 kW Special version it is Coupling type vertical concentric kit Ø 60/100. compulsory to install a diaphragm (10) inside the flange (3) The exhaust pipe (60 mm Ø) is fitted inside the aspiration...
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Page 22: Electrical Circuit
Y1 - Gas valve (optional) Y2 - Gas valve modulator The electrical circuit of the EOLO Mini 24-28 kW Special boiler is controlled 100% by a P.C.B. which controls boiler functions. Some of the control and safety devices work at mains voltage (230 V AC) while others at low voltage. -
Page 23: Low Voltage Circuit
See Digital Digital remote control as a weekly timer-thermostat. remote control (CRD) (optional) When CRD is installed, the pre-existing X40 jumper is to be operation (CRD) eliminated. STEMkW Special ed 01/08 EOLO Mini kW Special... - Page 24 The probe is located on the main exchanger outlet. closed contact Loads. Gas valve modulation coil Powered by the P.C.B. with variable continuous current. It varies gas pressure to the burner. (Y2) STEMkW Special ed 01/08 EOLO Mini kW Special...
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Page 25: Operating With The Remote Control
(E1) and parameters (see integrated P.C.B. operation). then both gas valve coils (Y1). Burner ignition is detected by the integrated P.C.B. via the ionisation electrode (E2). STEMkW Special ed 01/08 EOLO Mini kW Special... - Page 26 (E1) and then both the gas valve coils (Y1). Burner ignition is detected by the integrated P.C.B. by means of the ionisation electrode (E2). STEMkW Special ed 01/08 EOLO Mini kW Special...
- Page 27 Each time the burner switches off the fan keeps working for mode. 30 seconds. When the contact of the room thermostat closes (S20), the integrated P.C.B. powers the boiler circulator (M1) by means of STEMkW Special ed 01/08 EOLO Mini kW Special...
- Page 28 (if installed), it cannot be started if there is an ongoing d.h.w. request. It can be interrupted by cutting power to the circuit, putting the main switch on (Stand-by) or after the 15 minutes. * see Integrated P.C.B. programming. STEMkW Special ed 01/08 EOLO Mini kW Special...
- Page 29 It is a switch with clean contacts closing a circuit (low voltage) on heating OFF the integrated P.C.B. enabling central heating operation when Closed = Central (S20) (optional) ambient temperature is less than desired. heating STEMkW Special ed 01/08 EOLO Mini kW Special...
- Page 30 The single-pole relay controls the fan (M20) and is actuated when fan operation is re- quired. (K3) Adjustments. Gas type selector Depending on its position (Natural gas/LPG), the selector adapts modulation param eters Natural Gas/LPG to the type of gas firing the boiler. (S8) STEMkW Special ed 01/08 EOLO Mini kW Special...
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Page 31: Safety Devices
When safety thermostat contacts are open, the boiler is shut down. malfunction In order to restart the appliance, turn (R10)main switch to “Reset” and then carry out a (E4) DHW or central heating request. STEMkW Special ed 01/08 EOLO Mini kW Special... - Page 32 In order to avoid overheating the water-gas exchanger, when the boiler temperature read Flow overheating by NTC flow probe (B1) exceeds 95 °C, the fan starts until the temperature falls below ventilation 90 °C. STEMkW Special ed 01/08 EOLO Mini kW Special...
- Page 33 Technical Documentation Technical Documentation Indications and malfunctions. The EOLO Mini kW Special boiler signals malfunctions with if installed (CAR or CRD) by means of a numerical code the flashing of one or more LEDs as shown in the table below.
- Page 34 Technical Documentation Technical Documentation Programming the integrated P.C.B.. If wanted, some of the EOLO Mini kW Special boiler’s para- For the association of the LED to the value, see the following meters can be programmed. tables: By modifying these parameters the boiler can be adapted to your own specific requirements.
- Page 35 Central heating ignitions delayed due to LED flashing Room thermostat or Remote control requests (slow) (continuous variation) 0 seconds (Standard setting) LED 1 54 seconds LED 2 131 seconds LED 3 180 seconds LED 4 STEMkW Special ed 01/08 EOLO Mini kW Special...
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Page 36: Technical Data
Technical Documentation Technical Documentation Technical data. EOLO Mini 24 kW Special technical data. Nominal heat input kW (kcal/h) 25.8 (22146) Minimum heat input kW (kcal/h) 10.6 (9122) Nominal (useful) heat output kW (kcal/h) 24.0 (20640) Minimum (useful) heat output kW (kcal/h) 9.3 (8000) - Page 37 Technical Documentation Technical Documentation EOLO Mini 28 kW Special technical data. Nominal heat input kW (kcal/h) 30.0 (25782) Minimum heat input kW (kcal/h) 12.0 (10356) Nominal (useful) heat output kW (kcal/h) 28.0 (24080) Minimum (useful) heat output kW (kcal/h) 10.5 (9030) Efficiency at nominal heat output 93.4...
- Page 38 Technical Documentation Technical Documentation EOLO Mini 24 kW Special variable heat output. NATURAL GAS (G20) BUTANE (G30) PROPANE (G31) HEAT HEAT BURNER GAS BURNER NOZZLE BURNER GAS BURNER NOZZLE BURNER GAS BURNER NOZZLE OUTPUT OUTPUT FLOWRATE PRESSURE FLOWRATE PRESSURE FLOWRATE...
- Page 39 3.013305 Control unit kit for zone systems External probe code 3.011668 code 3.014083 Connections set kit (only for EOLO Mini 24 Special) Connections set kit (only for EOLO Mini 28 Special) code 3.015229 code 3.016671 Top cover kit Polyphosphate dispenser kit code 3.017179...
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Page 40: Troubleshooting
See "no ignition block" - b (wait for the board to perform 2 ignition cycles). The burner ignites. LEDs n° 2-7 flash See "electro-mechanical contacts (wait for the board to perform several ignition attempts) block" STEMkW Special ed 01/08 EOLO Mini kW Special... - Page 41 (see technical data, power, flow rate, delta T°) The heating request is satisfied. - the domestic hot water exchanger is clean, replace it if necessary. The domestic hot water request is satisfied. STEMkW Special ed 01/08 EOLO Mini kW Special...
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Page 42: Functioning Anomalies
230 VAC are present on clamps 6-7 of the connector X10 on the Replace the P.C.B. P.C.B. 230 VAC are present on the fan clamps. Restore the electric connection/replace the wiring. Replace the fan. STEMkW Special ed 01/08 EOLO Mini kW Special... - Page 43 Check the connection between the remote control and P.C.B. (clamps The Remote Control is connected correctly. 40-41 for CRD and 42-43 for CAR). N.B.: only remote controls supplied by Immergas (CAR or CRD) can be The connection of the CAR must be performed respecting polarity (IN+ used.
- Page 44 - with the aid of the single wire wiring diagram, use the tester to check there is no voltage on both main power supply cables of the main coils of the gas valve (see gas circuit chapter). STEMkW Special ed 01/08 EOLO Mini kW Special...
- Page 45 DHW system. The flow switch operates correctly. Check/clean/replace the flow switch. The wiring between the flow switch and board is OK. Restore the electric connection/replace the wiring. Replace the P.C.B. STEMkW Special ed 01/08 EOLO Mini kW Special...