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Immergas HERCULES Condensing 26 2 E Manual
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Immergas HERCULES Condensing 26 2 E Manual

Ecological floor-standing condensing boiler with stainless steel storage tank
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HERCULES
Condensing 26 2 E / 32 2 I
Ecological floor-standing
condensing boiler
with stainless steel storage tank

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Summary of Contents for Immergas HERCULES Condensing 26 2 E

  • Page 1 HERCULES Condensing 26 2 E / 32 2 I Ecological floor-standing condensing boiler with stainless steel storage tank...
  • Page 3 Technical Documentation Technical Documentation HERCULES Condensing Ecological floor-standing condensing boiler with 120 litre storage tank HERCULES Condensing 26 2 E HERCULES Condensing 32 2 I HERCULES Condensing ABT 32 2 I General features. HERCULES Condensing combines the advantages of an with variable temperature is not envisioned) from 25 to 50°C.
  • Page 4 Technical Documentation Technical Documentation Main dimensions and connections. HERCULES Condensing Key: RA3 - Zone 3 high temperature system return G 3/4” (optional) MA3 - Zone 3 high temperature system flow G 3/4” (optional) RA2 - Zone 2 high temperature system return G 3/4”...
  • Page 5 Technical Documentation Technical Documentation HERCULES Condensing control panel. Key: 11 - Boiler connected to remote control (Optional) - Stand-by - On Button 12 - Functioning in summer mode 13 - Anti-freeze function in progress A - Summer ( ) and winter ( ) functioning mode selection but- 14 - Functioning in winter mode 15 - Functioning with domestic hot water priority active B - DHW priority button (...
  • Page 6 Technical Documentation Technical Documentation HERCULES Condensing main components. Key: 1 - Stainless steel storage tank unit 24 - 3 bar safety valve 2 - DHW recirculation pump (optional) 25 - D.H.W. expansion vessel 3 - Three-way valve (motorised) 26 - System filling valve 4 - Zone 1 by-pass 27 - Condensate drain trap 5 - Zone 1 one-way valve...
  • Page 7 Technical Documentation Technical Documentation HERCULES Condensing ABT main components. Key: 1 - Stainless steel storage tank unit 24 - 3 bar safety valve 2 - DHW recirculation pump (optional) 25 - D.H.W. expansion vessel 3 - Three-way valve (motorised) 26 - System filling valve 4 - High temp.
  • Page 8 Technical Documentation Technical Documentation HERCULES Condensing hydraulic diagram. Standard Configuration Key: 1 - Stainless steel coil for storage tank 2 - System draining valve 3 - Polyphosphate dispenser (optional) 4 - System filling valve 5 - 3 bar safety valve 6 - Manifold draining valve 7 - Condensate drain trap 8 - Gas valve...
  • Page 9 Technical Documentation Technical Documentation HERCULES Condensing ABT hydraulic diagram. Key: 1 - Stainless steel coil for storage tank 2 - System draining valve 3 - Polyphosphate dispenser (optional) 4 - System filling valve 5 - 3 bar safety valve 6 - Manifold draining valve 7 - Condensate drain trap 8 - Gas valve 9 - Gas valve outlet pressure point (P3)
  • Page 10 Technical Documentation Technical Documentation Primary circuit (boiler circuit). The primary circuit, with relative control and safety devices, is started every time there is a central heating or domestic hot water request. Operation (see HERCULES Condensing hy- draulic diagram). The heat contained in the combustion products is absorbed by the pipes of the water-gas primary heat exchanger with coil inserted in the condensation module (17) which then gives the heat up to the water made to circulate inside the boiler...
  • Page 11 FLUE GAS densation chamber (2). HERCULES Condensing 26 2 E. The first three elements are affected directly by the action of the cylindrical burner applied to the front, while the fourth is arranged in the condensation chamber, which is separated from the combustion chamber by sheet steel (see flue circuit).
  • Page 12 Technical Documentation Technical Documentation Motorised 3-way valve. It is an electric 3-way valve operating on he primary circuit return that allows, according to request (DHW or CH), to introduce boiler water into the CH system or the storage tank coil. Hydraulic Pump manifold...
  • Page 13 Technical Documentation Technical Documentation Safety devices and controls. System filling (3). It is a ball valve positioned between the boiler circuit and the domestic cold water inlet that allows to pressurise the CH system. The valve is connected to the domestic cold water inlet unit (4).
  • Page 14 Technical Documentation Technical Documentation GIM Multifunction Integrated Unit. Before replacing the various components present on the GIM System pressure switch replacement (10). To replace the system pressure switch (10), slide the relevant unit, the water present inside the primary circuit must be locking clips out.
  • Page 15 Technical Documentation Technical Documentation Central heating circuit. HERCULES Condensing functioning with 1 pump (Zone 1) (standard configuration). STORAGE TANK COILS RETURN STORAGE TANK COILS FLOW Following a central heating type request, the P.C.B. starts the boiler pump (2), powers the central heating pump (4) and powers the electric 3-way valve motor (3) causing it to shift to the central heating position.
  • Page 16 Technical Documentation Technical Documentation Central heating pump (4). It operates on the system flow after the hydraulic manifold (1). It is physically fixed onto the system flow pipe and to the boiler flow manifold, to which it is connected using threaded fittings.
  • Page 17 Technical Documentation Technical Documentation Head available at zone 1 (standard) with by-pass inserted The use of the pump positioned downstream from the hydrau- lic manifold allows to provide a high system flow rate. The graphics below represent the trend of the head available to zone 1 system (standard), depending on pump speed and with the by-pass inserted between flow and return.
  • Page 18 Technical Documentation Technical Documentation HERCULES Condensing functioning with 2 or 3 additional homogeneous zones (optional) (configuration with high temperature zones kit). STORAGE TANK COILS RETURN STORAGE TANK COILS FLOW Any division of the zone system (2 or 3) requires the assembly of a relevant kit inside the casing, which envisions the use of the zones management board (21) (see "Digital zones board"...
  • Page 19 Technical Documentation Technical Documentation Head at the other additional high temperature zones. The use of several pumps positioned downstream from the hydraulic manifold allows to provide a high system flow rate. The graphics below represent the trend of the head available to system zones 2 and 3 at high temperature, depending on pump speed and with the by-pass inserted between flow and return.
  • Page 20 Technical Documentation Technical Documentation Functioning with mixed systems (as per standard for HERCULES Condensing ABT, optional for HERCULES Condensing) (configuration with Low Temperature Kit). STORAGE TANK COILS RETURN STORAGE TANK COILS FLOW The coupling to a mixed system divided into two zones envi- sions the installation of the "low temperature kit"...
  • Page 21 Technical Documentation Technical Documentation N.B.: Regarding the wiring diagram, settings, signals, etc. see the “Zones digital control unit" technical sheet. Head available at the additional low temperature zone. In functioning condition with mixed systems, the use of several pumps guarantees a greater total flow rate to the system. The graphics below represent the trend of the head available to the low temperature zone system, depending on pump speed and with the by-pass inserted between flow and return.
  • Page 22 Technical Documentation Technical Documentation HERCULES Condensing functioning with mixed systems with 2 additional mixed zones (optional) (configuration with Low Temperature Kit). STORAGE TANK COILS RETURN STORAGE TANK COILS FLOW The division of the mixed system into three zones requires the assembly of a relevant kit inside the casing, which envisions the use of the zones management board (21) (see "Digital zones board"...
  • Page 23 Technical Documentation Technical Documentation “low temperature” zone (zone 3). The control of the correct mixing is entrusted to an NTC probe This portion of circuit is also envisioned to operate with floor (12) connected to the zones control unit (21). panel systems.
  • Page 24 Technical Documentation Technical Documentation DHW circuit. The DHW circuit is affected every time it is necessary to take (see electric 3-way valve functioning) leads to the closure of the the temperature of the water contained in the storage tank to hydraulic manifold return pipe and the simultaneous opening the desired temperature (15) and is measures using the DHW of the passage towards the storage tank coil (13).
  • Page 25 Technical Documentation Technical Documentation Storage tank. exceeded (8 bar). It is mounted on the domestic cold water inlet manifold unit It is a 120 litre stainless steel storage tank with coil and totally after the DHW one-way valve. insulated using self-extinguishing polystyrene. It has an external casing enclosed in the upper part by a flange DHW expansion vessel (5).
  • Page 26 Technical Documentation Technical Documentation Functioning with solar panels kit (optional). (6) detects a temperature lower than that requested and than that of the water heated using the panels. If the intake of solar energy is not sufficient to satisfy require- ments (prolonged withdrawals, little insulation, etc) and the boiler DHW NTC probe (14) measures a temperature lower than that set, the burner is started and the upper coil (4)
  • Page 27 Technical Documentation Technical Documentation Air-gas circuit. Gas valve. The gas valve is equipped with two main coils controlled by the electric circuit and with a pneumatic unit that modulates the outlet gas pressure in 1:1 ratio to the pressure (P1) detected on the inlet of the Venturi pipe.
  • Page 28 Technical Documentation Technical Documentation Fan. Operates upstream from the combustion chamber and is positioned under the condensation module. It is controlled by the integrated P.C.B. with a positive square wave signal with variable ON-OFF (duty-cycle) ratio. Its speed is adjusted (from about 1100 to about 5100 rpm) depending on the power requested and is controlled using a sensor with Hall effect, which detects the number of revs.
  • Page 29 Technical Documentation Technical Documentation HERCULES Condensing 26 2 E = 4.7 kW (4.042 kcal/h) (20 % of the nominal output). HERCULES Condensing 32 2 I = 6.9 kW (5.934 kcal/h) (20 % of the nominal output). Ignition takes place by means of an integrated P.C.B. that controls the ignition (7) and detection electrodes (9).
  • Page 30 Technical Documentation Technical Documentation Disassembly of combustion circuit main components. Before disassembling the components, make sure the gas cock Loosen the tightening bolts on the system flow and return pipes is closed. and of the condensate discharge pipe positioned in the lower part of the module.
  • Page 31 Below find the default settings present on the boiler (length 1 m): HERCULES Condensing 26 2 E G20: GPL: MIN. MAX. 5060 (rpm)
  • Page 32 Technical Documentation Technical Documentation Regulation of the air-gas ratio (off-set). The correct regulation of the air-gas ratio (1:1) takes place in the factory and must be retouched only when carbon dioxide (CO ) values are detected in the fumes that are not optimal.
  • Page 33 Technical Documentation Technical Documentation Flue circuit. Flue exhaust Exhaust Condensate Operation. The functioning of the fan positioned at the entry of the air- gas mixing pipe, guarantees the fan-assisted expulsion of the combustion products (5). These directly hit the first three elements (26 2 E) or 4 (32 2 I) of the primary heat exchanger inserted in the sealed com- bustion chamber (6), which has a sheet steel section on its base (7) that divides it from the condensation chamber (2)
  • Page 34 The generators with condensation technology must be installed using the specific series of intake and exhaust pipes, which have been designed to be coupled exclusively to the Immergas condensing boiler. The “GREEN SERIES” flue kit is made in plastic (PPS = self- extinguishing polypropylene) suitable for resisting the corrosive action of the acid condensate.
  • Page 35 Technical Documentation Technical Documentation Configuration with sealed chamber and fan- 60/100 push-fitting horizontal concentric kit. The exhaust pipe in PPS (Ø 60 mm) is inserted inside the assisted circulation (type C). aluminium exhaust pipe (Ø 100 mm). Exhaust. Connection to the boiler takes place using a 90º bend (2), The connection to the flue exhaust pipes takes place using a which can be turned in all directions and by using necessary flange (2) or a flanged curve to fix to the fitting (4) present on...
  • Page 36 Connections to the boiler take place using the two appropri- Immergas condensing appliance. ate flanges that allow exhaust (4) from the central fitting and Fit a 90° bend (5) to the appliance exhaust pipe which, using...
  • Page 37 It is a kit that allows ducting Ø 80 mm of existing flues/ chimneys/technical slots to be used exclusively with a unique chimneys/technical slots to be used exclusively with a unique Immergas condensing appliance. Immergas condensing appliance. Fit a 90° bend (5) to the appliance exhaust pipe which, using Fit an 87°...
  • Page 38 Technical Documentation Technical Documentation Electric circuit. Storage tank function jumper Brown Blue Orange SPEED Supply CH ON 230 VAC Super CAR 50 Hz remote control (Optional) IMG BUS LINK SIGNAL STATE Key: - Display board - Boiler pump - Pump relay board - CH pump - Flow probe - Fan...
  • Page 39 Technical Documentation Technical Documentation 230 V AC circuit. Safety devices and controls. It detects burner ignition from where the flame is hit. Detection electrode It is connected to the detection circuit of the integrated P.C.B. (E2) It cuts off the power supply to the circuit when the current absorbed Fuse Line fuse exceeds 3.15A.
  • Page 40 Technical Documentation Technical Documentation Low voltage circuit. Safety devices and controls. Allows long distance control of the generator (SUM/WIN selector See Comando switch, temperature adjustment and indication, alarms display, reset, Comando Amico Remoto Amico Remoto remote control etc.) and acts as weekly timer thermostat. remote control (CAR) (optional) If the CAR is installed the pre-existing X40 jumper must be...
  • Page 41 IMG BUS outlet It allows the connection of electronic devices, e.g. Immergas zones digital control unit. Gas valve (Y1) It is powered (24 V DC) by the integrated P.C.B. when burner ignition is necessary.
  • Page 42 Technical Documentation Technical Documentation Electric circuit. Fase riscaldamento. SAFETY EXTRA LOW VOLTAGE CIRCUIT Super CAR remote control (Optional) SIGNAL STATE IMG BUS link RELAY BOARD (Optional) Link for VIRGILIO palmtop Microprocessor programming connector Storage tank function CH ON jumper Operating with room thermostat. Operation with Remote Control.
  • Page 43 Technical Documentation Technical Documentation Circuito elettrico. Electric circuit. SAFETY EXTRA LOW VOLTAGE CIRCUIT Super CAR remote control (Optional) SIGNAL STATE IMG BUS link RELAY BOARD (Optional) Link for VIRGILIO palmtop Microprocessor programming connector Storage tank function CH ON jumper Operation. By pressing the main button ( ) boiler activation is enabled, which is enabled for functioning in the DHW phase.
  • Page 44 Technical Documentation Technical Documentation Integrated P.C.B. Fuse F1 WINTER end run switch "1" opens when the CH position is reached. Inside the control panel the boiler is equipped with a P.C.B. This leads to the power supply of relay K1 positioned on the with integrated microprocessor for control of the appliance's pump relay board (A10) and the consequent power supply of electric devices, which takes care of linear modulation of...
  • Page 45 Technical Documentation Technical Documentation DHW request. Central heating anti-freeze request. By pressing the main button ( ) boiler activation is enabled, When the temperature detected by the CH flow probe (B1) which is enabled for functioning in the DHW phase. falls below 4 °C, the board gives consent for ignition and keeps If the temperature detected by the DHW NTC probe (B2), the generator working with the burner at minimum output...
  • Page 46 CH request signals to the board (time, room temperature, error codes, etc...). (optional) (see CAR functioning) IMG BUS connection It allows the connection of electronic devices, e.g. Immergas zones digital control unit. (optional) Open = When the pressure of the primary circuit is lower than 0.3 bar...
  • Page 47 Technical Documentation Technical Documentation It is a resistance that can be varied proportionally to the external External probe (B4) temperature. PTC probe It allows the integrated P.C.B. to vary the system flow temperature 1 kΩ 25 °C (optional) depending on the external temperature. It is a resistance that can be varied in an inversely proportional Flow probe NTC probe...
  • Page 48 (optional) on the remote control display. IMG BUS connection It allows the connection of electronic devices, e.g. Immergas zones digital control unit. (optional) It is a positive square wave signal with variable ON-OFF relationship (duty-cycle) that controls the fan.
  • Page 49 Technical Documentation Technical Documentation Safety devices. After 24 hours from the last activation, independently from the functioning status of the Three-way valve/anti-block boiler (Summer or Winter), the pump (M1) is started for a time of 30 seconds and the pump three-way valve (M30) is started for a period of 10 seconds.
  • Page 50 Technical Documentation Technical Documentation If the contact of the water overheating thermostat is opened (temperature of the primary Low temperature zones 2 circuit exceeding 55 °C), functioning of the respective CH zone is blocked. and 3 safety thermostat To re-start the appliance, press the “Reset” button "C" and then make a central heating block or domestic hot water request.
  • Page 51 Technical Documentation Technical Documentation Functioning status and mode. The boiler is supplied with a control panel (where the buttons In normal functioning phase the display indicates the func- and temperature selector switches used to control the boiler are tioning mode. positioned) and a display that shows appliance functioning In the case shown below as an example, the boiler is function- mode and status.
  • Page 52 Technical Documentation Technical Documentation Below find a list of the various boiler functioning status that appear on the malfunction display by means of the indicator (6). Display (6) Description of functioning states Summer functioning mode in progress without request. SUMMER Boiler in stand-by for domestic hot water request.
  • Page 53 Technical Documentation Technical Documentation Programming the P.C.B. Important: if the international language is to be restored (A1), The HERCULES Condensing boiler is prepared for possible proceed as follows: programming of several operation parameters. - press button “D” to enter the configuration menu. By modifying these parameters as described below, the boiler can be adapted according to specific needs.
  • Page 54 Technical Documentation Technical Documentation Information menu M1 (INFO). This menu contains the various information relative to boiler operations: Button 2nd Level Button 3rd Level Button Description Level Displays the management software version of the circuit board installed (SOFTWARE) in the boiler D ...
  • Page 55 Technical Documentation Technical Documentation Menu configurations M5 (CONFIG). This menu contains all configuration options of the boiler functioning parameters that can be customised. (The first item of the various options that appears inside the parameter is that selected by default). M5 Menu (CONFIG) (an access code must be introduced) Value...
  • Page 56 Technical Documentation Technical Documentation M5 Menu (CONFIG) (an access code must be introduced) Value Default 1st Level 2nd Level Options Description set by the value technician P67.1 In winter mode the boiler pump and that of the main zone are always (CONTI- powered and therefore always function NUE)
  • Page 57 Technical Documentation Technical Documentation Menu setting M9 (ZONES). This menu contains the settings of the functioning temperatures in the low temperature zone (standard for ABT version, optional for other models) and any other additional low temperature zone (optional). Button 2nd Level Button Description Level...
  • Page 58 Technical Documentation Technical Documentation Fault and anomaly signals. The HERCULES Condensing boiler signals any anomalies code described in the following table. To eliminate the block by the flashing symbol (5) along with the “ERRxx” indica- (where necessary), press the RESET "C" button positioned on tion on the indicator (6) where “xx”...
  • Page 59 Technical Documentation Technical Documentation Technical Data. HERCULES Condensing technical data. Hercules Hercules Condensing 26 Condensing 32 2 I Domestic hot water nominal heat input kW (kcal/h) 26,9 (23137) 33,0 (28392) Central heating nominal heat input kW (kcal/h) 24,9 (21415) 33,0 (28392) Minimum heat input kW (kcal/h) 5,0 (4323)
  • Page 60 Technical Documentation Technical Documentation HERCULES Condensing ABT 32 2 I technical data. Domestic hot water nominal heat input kW (kcal/h) 33,0 (28392) Central heating nominal heat input kW (kcal/h) 33,0 (28392) Minimum heat input kW (kcal/h) 7,3 (6279) Domestic hot water nominal heat output (useful) kW (kcal/h) 32,0 (27520) Central heating nominal heat output (useful)
  • Page 61 Technical Documentation Combustion parameters. Supply pressure mbar (mm H 20 (204) 29 (296) 37 (377) HERCULES Condensing 26 2 E Gas nozzle diameter 5,70 4,10 4,10 Flue flow rate at nominal heat output kg/h Flue flow rate at min heat output kg/h at Nom Q./Min.
  • Page 62 Technical Documentation Technical Documentation HERCULES Condensing 26 2 E variable heat output. METHANE (G20) BUTANE (G30) PROPANE (G31) HEAT HEAT BURNER PRESS. NOZZLES BURNER PRESS. NOZZLES BURNER PRESS. NOZZLES OUTPUT OUTPUT GAS FLOW RATE PRESSURE GAS FLOW RATE PRESSURE GAS FLOW RATE...
  • Page 63 Technical Documentation Technical Documentation List of accessories and optionals. Radio timer-thermostat (wireless) Super Comando Amico Remoto remote control code 3.014439 code 3.016577 GSM telephone control kit External Probe code 3.017182 code 3.014083 Comando Amico Remoto remote control Solar panels coupling kit code 3.011236 code 3.019998 Digital weekly timer-thermostat...
  • Page 64 Technical Documentation Technical Documentation Ricerca guasti HERCULES Condensing. Before every intervention: Check that the gas, water and electricity are correctly connected Before maintenance interventions or replacement of compo- to the boiler, according to that indicated in the data plate and nents, remove the electric power supply upstream from the the instruction manual.
  • Page 65 Technical Documentation Technical Documentation The error 02 appears on the display See error section 02-a The pump starts. The error 03 appears on the display See error section 03-a The error 16 appears on the display See error section 16-a The error 16 appears on the display See error section 16-b The error 20 appears on the display...
  • Page 66 Technical Documentation Technical Documentation Error codes. ERROR 01 No ignition block The cables between igniter and electrodes corresponds. Restore the electric connection/replace the wiring. The igniter makes the spark. Replace the igniter. If the anomaly persists, replace the P.C.B. At least 14 V DC is present on clamps 2-3 of the connector X19. Replace the P.C.B.
  • Page 67 Technical Documentation Technical Documentation Clean/restore the correct functionality of the flue extraction elements, checking lengths and any obstructions. Flue evacuation takes place correctly. Clean/restore the correct functionality of the condensation module checking that there are no combustion impurities deposited on the heat exchanger (soot, oxidations, etc..).
  • Page 68 Technical Documentation Technical Documentation ERROR 16 Fan anomaly 24 VDC is present to clamps 1-2 of the connector X7. Replace the P.C.B. The wiring between the P.C.B. and fan is OK. Restore the electric connection/replace the wiring. Replace the fan. If the anomaly persists, replace the P.C.B. The wiring between the P.C.B.
  • Page 69 The Remote Control is connected correctly. Check the connection between P.C.B. (clamps 42-43) and remote control N.B.: it is possible to use only remote controls supplied by Immergas (IN+ and IN-) carried out respecting the polarity and using a dedicated (CAR or Super CAR).
  • Page 70 Technical Documentation Technical Documentation The L.T. zone 3 safety thermostat functions regularly (intervention Replace the over-heating safety thermostat. temperature higher than 55 °C). The zone pump and the mixing valve function correctly. See section G Restore circulation in the CH system by acting on the closed devices and also check: - the correct functioning of the zone by-pass;...
  • Page 71 Technical Documentation Technical Documentation Sections 230 VAC are present on the L-N terminals of the P.C.B. Check the electric power supply upstream from the boiler and restore it. The P.C.B. fuse is integral. See section E The wiring between the P.C.B. and display board is OK. Restore the electric connection/replace the wiring.
  • Page 72 Technical Documentation Technical Documentation 230 VAC are present on the L-N terminals of the zones control unit Check the electric power supply upstream from the zones control unit (green LED H11 on with fixed light). and restore it. The connection between the zones digital control unit and boiler Restore the IMG BUS connection.

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