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Summary of Contents for Ariston CLAS
- Page 1 TRAINING MANUAL FAMILY: Wall hang boilers UNIT: Conventional Compact MODELS: CLAS RELEASE: 27.05.2009...
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Page 2: Table Of Contents
Training manual CLAS INDEX GENERAL INFORMATION ..........................4 SIZES AND DIMENSIONS ..........................4 SEALED CHAMBER OVERALL VIEW (FF) ....................5 OPEN CHAMBER ASSEMBLY VIEW (CF) ....................6 CLAS..................................7 HEATING MODE: OPERATING LOGIC ......................7 2.1.1 Hydraulic heating operating diagram ...................... 10 SANITARY MODE: OPERATING LOGIC .................... - Page 3 Manuale Didattico – ACO Manuale didattico CLAS 5.7.1 Post-ventilation ............................47 EXHAUSTIC CONTROL (CF ) ....................47 OPEN CHAMBER EXHAUST SYSTEMS ( FF) ....................48 SEALED CHAMBER 5.10 EXHAUST SYSTEMS (CF ) ....................50 OPEN CHAMBER ELECTRIC AND ELECTRONIC SYSTEM ....................... 51 MAIN CARD ..............................
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Page 4: General Information
Training manual CLAS 1 GENERAL INFORMATION SIZES AND DIMENSIONS CAPTION System delivery Hot water outlet Gas inlet Cold water inlet Heating system return Safety valve exhaust Drain valve Filling tappet Pag. 4 di 71... -
Page 5: Sealed Chamber Overall View (Ff)
Manuale Didattico – ACO Manuale didattico CLAS SEALED CHAMBER OVERALL VIEW (FF) CAPTION Air intake for Twin Pipe Flue System NTCs sanitary temperature probe Air pressure switch 3 bar safety valve Air pressure switch pressure intake Instrument panel condensate exhaust... -
Page 6: Open Chamber Assembly View (Cf)
Training manual CLAS OPEN CHAMBER ASSEMBLY VIEW (CF) CAPTION Flue Hood NTCs sanitary temperature probe Flue Control Thermostat 3 bar safety valve Overheat Thermostat Instrument panel NTC1heating delivery temperature Pump probe NTC2 heating return temperature Burner and electrodes probe Gas valve and spark generator Main Heat exchanger Pag. -
Page 7: Clas
Manuale Didattico – ACO Manuale didattico CLAS 2 CLAS HEATING MODE: OPERATING LOGIC OPERATION 40°C 82°C RANGE You can see (for 4 seconds) the temperature that you are setting on the display by turning the knob . Through the parameters... - Page 8 Training manual CLAS Air pressure switch enabling allows to pass to the following stage. If this does not occur, after 20 seconds, the boiler will stop for safety 6 P1 the Fan remains Air pressure switch on waiting for consent (sealed chamber models).
- Page 9 Manuale Didattico – ACO Manuale didattico CLAS After flame detection the boiler is free to modulate the power according to the required thermal load. Modulation is carried out between the maximum heating power values (adjustable from the control panel with parameter 231) and the minimum power value (set made on the gas valve).
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Page 10: Hydraulic Heating Operating Diagram
Training manual CLAS 2.1.1 Hydraulic heating operating diagram Pag. 10 di 71... -
Page 11: Sanitary Mode: Operating Logic
Manuale Didattico – ACO Manuale didattico CLAS SANITARY MODE: OPERATING LOGIC OPERATING RANGE 60°C 36°C You can see (for 4 seconds) the temperature that you are setting on the display by turning the knob . A demand for Domestic hot water, is detected DEMAND FOR by the proportional flow meter. - Page 12 Training manual CLAS Spark Generator Occurs after air pressure switch enabling and gas valve ON The gas valve is supplied at the set power for BURNER the Soft Ignition (adjustable from the control ignition panel with parameter 220). Flame ionization if checked. (by the detection electrode).
- Page 13 Manuale Didattico – ACO Manuale didattico CLAS Produced till 31/07/2008 Modulation occurs between the value of the sanitary maximum power (set on the gas valve) and the value of the minimum power (also set on the gas valve). The burner runs until the scale prevention temperature is reached.
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Page 14: Sanitary Mode Operation Hydraulic Diagram
Training manual CLAS 2.2.1 Sanitary mode operation hydraulic diagram Cold water inlet Pag. 14 di 71... -
Page 15: Special Functions
Manuale Didattico – ACO Manuale didattico CLAS 3 SPECIAL FUNCTIONS “FLUE CLEANER” Function This function is used to perform proper boiler combustion analysis and maximum and minimum gas calibration. Follow the instructions below to enable it: PRESS DISPLAY The display will show this indication Press Reset button for 5 continuous seconds ... -
Page 16: Comfort" Function
Training manual CLAS “COMFORT” Function This function reduces the hot sanitary water output time. The objective is reached by keeping the primary circuit in the boiler hot. To enable this function follow the instructions below: How to enable the COMFORT function Press button “C”... -
Page 17: Antifreeze" Function
Manuale Didattico – ACO Manuale didattico CLAS “ANTIFREEZE” Function This function is enabled only if the ON/OFF selector is turned on position ON. It is operated by means of the temperature detected by the heating delivery probe (NTC1). CONDITION EVENTS... -
Page 18: Water Flow Check
Training manual CLAS “WATER FLOW CHECK” What happens Check When 1 P1 1. Immediate safety shutdown - 10sec of post-circulation Check always with the - 10 sec of post-ventilation Gradient Tman > 7°C/sec flame on, except during The boiler restarts after 10sec. - Page 19 Manuale Didattico – ACO Manuale didattico CLAS Gradient Tman > 7°C/sec >7°C/sec Gradient <7°C/sec 10 sec 10 sec 10 sec 20 sec (post-vent.) Circulating device 60 sec (post-circ.) Burner 255 sec Timer 1 P1 1 P1 1 03 Gradient Tman or Trit > 20°C/sec Case “B”...
- Page 20 Training manual CLAS Tman - Trit > 55°C Verify did also during 7 sec after every switch off of the burner >55°C Tman-Trit <55°C 10 sec 10 sec 10 sec 20 sec (post-vent.) Circulating device 60 sec (post-circ.) Burner 255 sec...
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Page 21: Air Purge" Function
Manuale Didattico – ACO Manuale didattico CLAS Trit > Tman + 30°C >Tman+30°C Trit <Tman+30°C 20 sec (post-vent.) Circulating device 60 sec (post-circ.) Burner 1 07 “AIR PURGE” Function. (press “MENU’/OK”) or pressing of “Esc” This function can be activated by the installer by the parameter 7 01 key for 5 sec ( continues till to the finish (about 6’) or pressing of “Esc”... -
Page 22: Self Adaptive Heating Restart Delay
Training manual CLAS “SELF ADAPTIVE HEATING RESTART DELAY” With the parameter 2 35 it is possible chose the heating restart delay type: 0: manual; 1: automatic. MANUAL: with the parameter 2 36 it is possible set the heating restart delay between 0 and 7 min. -
Page 23: Hydraulic Unit
Manuale Didattico – ACO Manuale didattico CLAS 4 HYDRAULIC UNIT Main heat exchanger Overheat Expansion thermostat vassel Heating Delivery probe Heating return NTC1 probe NTC2 Primary inlet Primary outlet pipe pipe Secondary 3-way valve exchanger NTCs sanitary Automatic air outlet probe... -
Page 24: Right Hydraulic Block
Training manual CLAS Right hydraulic block Composite block with integrated functions : CH and DHW filter Electrical diverter valve All components fitted by clips Pump unit with deareator valve Brass connectors for installation Filling tap LEGEND 3-way valve motor Domestic Hot Water flow switch... -
Page 25: Left Hydraulic Block
Manuale Didattico – ACO Manuale didattico CLAS Left hydraulic block Composite module for CH and domestic hot water outlet. Components integrated in the block : immerged DHW NTC CH safety valve 3bar Automatic by-pass Brass connections All copper pipes connected by clips LEGEND 1. -
Page 26: 3-Way Valve
Training manual CLAS 3-WAY VALVE The boiler uses a 3-way to change the water distribution (heating system side or secondary exchanger side). It’s managed by the PCB through a special relay. It is formed by a composite material body and an electric motor (Actuator). -
Page 27: The Attitude Of The Boiler During 3-Way Valve Switching
Manuale Didattico – ACO Manuale didattico CLAS 4.3.1 The attitude of the boiler during 3-way valve switching. The boiler is in stand-by, the valve is on “SANITARY” position: WHEN TURNED ON HEATING operating cycle on “heating” mode is delayed for 7 seconds (time required by the shaft to switch from “sanitary”... -
Page 28: Secondary Exchanger
Training manual CLAS SECONDARY EXCHANGER The secondary exchanger is fixed to the hydraulic unit with two screws. The two points where the screws are to be fixed are asymmetric with the body of the exchanger so that it can be assembled only in the proper position. -
Page 29: Pump Unit
It is possible to exclude the pump modulation with the parameter 00: speed 2 fix; 01: speed 3 fix; 02: modulating. Till CLAS 24 e 28 27/08/2008 From 28/08/2008 The anti-sticking system enables the circulating device and the 3-way valve for 15 sec. every 21 hours from the last operation. -
Page 30: Pump Speed Check
Training manual CLAS 4.5.1 PUMP speed check The speed of the pump can be checked by means of parameter 8 23 or by measuring the voltage (Vac) between pins 5 and 6 of the electronic card CN10 connector: - 145 Vac: maximum speed;... -
Page 31: Heating Pressure Switch (Only For Ff Version, From July 2009)
Manuale Didattico – ACO Manuale didattico CLAS HEATING PRESSURE SWITCH (only for FF version, from July 2009) The minimum pressure switch verifies the pressure in the heating circuit, with micro-switch ON/OFF. The setting are: OFF: 0,4 bar; ON: 0,6 bar. -
Page 32: By-Pass
Training manual CLAS BY-PASS The boiler has an automatic by-pass and, therefore no regulation is required. In the case of load losses in the system caused for example by the intervention of thermostat or area valves, the by-pass guarantees a flow in the condensing main exchanger of at least 350l/h. -
Page 33: Primary Exchanger
Manuale Didattico – ACO Manuale didattico CLAS 4.10 PRIMARY EXCHANGER The body of the exchanger is made of copper and with an anti corrosion silicone treatment, it transmits heat of the combustion products to the primary circuit water. A thermostat 102°C+\ - 4°C with automatic reset controls overheating. -
Page 34: Heating Filter
Training manual CLAS 4.11 HEATING FILTER On the heating return unit there is a filter that can be reached from the front side of the boiler. To inspect and clean the filter follow the instructions shown below. Filtro circuito riscaldamento... -
Page 35: Expansion Vessel
Manuale Didattico – ACO Manuale didattico CLAS 4.12 EXPANSION VESSEL The expansion vessel absorbs primary circuit water expansion when there is a boiler temperature raise. It is constituted by two parts separated by a SBR rubber membrane. On one side nitrogen on the other water of the primary circuit. -
Page 36: Sanitary Proportional Flow Meter
Training manual CLAS 4.13 SANITARY PROPORTIONAL FLOW METER When turned on sanitary mode, the flow of water passes through the turbine that allows the electronic card to measure the flow by means of a reed sensor. When there are variations of sanitary flow, through the measurement of the proportional flow meter, the PCB anticipates the gas opening or closing, to reduce the temperature oscillations. -
Page 37: Temperature Probe
Manuale Didattico – ACO Manuale didattico CLAS 4.14 TEMPERATURE PROBE To check the delivery and return temperature use the two contact sensor. To read the sanitary water temperature the immersion sensor located on the sanitary outlet is used. If the NTCs sensor does not work properly the temperature will be checked by sensor NTC2. -
Page 38: Overheat Thermostat
Training manual CLAS 4.15 OVERHEAT THERMOSTAT The opening of contact of overheat thermostat (102±4°C) causes boiler safety shutdown (not signalled) and if after 5 sec the thermostat is already opened causes shutdown signalled by the “blocked” led that lights up and the relevant... -
Page 39: Gas Unit
Manuale Didattico – ACO Manuale didattico CLAS 5 GAS UNIT SIT 845 SIGMA GAS VALVE The gas valve mounted is a SIT 845 SIGMA valve fitted with two operators supplied at 220VCA that consent or cut off the gas supply to the main burner. A low voltage (24V) modulator is mounted on the valve to regulate the outgoing gas pressure of the valve according to the readings detected by the electronic P.C.B. -
Page 40: Gas Regulations
Training manual CLAS GAS REGULATIONS 5.3.1 SUPPLY PRESSURE CHECK Fig. A SUPPLY PRESSURE CHECK Loosen screw “1” (fig. A) and insert the pressure gauge fitting pipe in the pressure intake. Put the boiler on maximum operating power (hot water tap open). -
Page 41: Minimum Power Check
Manuale Didattico – ACO Manuale didattico CLAS 5.3.3 MINIMUM POWER CHECK Fig. D To check the minimum power loosen screw “2” (fig.B) and insert the pressure gauge fitting pipe in the pressure intake. Disconnect the compensation pipe of the air chamber (fig.B). -
Page 42: Gas Pressure/Heat Input Graphics - Models Ff
Training manual CLAS GAS PRESSURE/HEAT INPUT GRAPHICS – MODELS FF 5.3.6 Pag. 42 di 71... -
Page 43: Heating Delay Regulation
Manuale Didattico – ACO Manuale didattico CLAS 5.3.7 HEATING DELAY REGULATION - Regulation carried out on parameter 2 36 This boiler has a regulation that allows to change the delay time between the heating request and the burner ignition choosing between 0 and 7 minutes. -
Page 44: Gas Table
Training manual CLAS 5.3.9 GAS TABLE Pag. 44 di 71... -
Page 45: Burner
Manuale Didattico – ACO Manuale didattico CLAS BURNER The same 19.0 mm pitch Polidoro burner is used on all the models. The electrodes (two ignition and one for flame detection) are constituted by one part. The ignition electrodes have to be kept a t a 4±1mm distance from the burner 8±1mm ramp. -
Page 46: The Fume Discharge System
Training manual CLAS THE FUME DISCHARGE SYSTEM On the external part of the boiler there is a fume discharge collector with two intakes used to detect the temperature of the combustion gas and of the fresh air inlet , concentrations of O2, CO2, etc. -
Page 47: Fixed Speed Fan
Manuale Didattico – ACO Manuale didattico CLAS FIXED SPEED FAN The fan, positioned on the smoke hood, assures proper smoke evacuation. The following fans are used: 25kW: 35W motor; 30kW: 45W motor. On the fan there is a pressure intake that connected to intake “L” of the air pressure switch generates depression. -
Page 48: Exhaust Systems (Sealed Chamber Ff)
Training manual CLAS EXHAUST SYSTEMS (sealed chamber FF) The boiler is arranged for both coaxial smoke exhaust 60/100mm and for the split 80/80mm (two ways to connect the intake pipes). Combustion analysis intakes are built-in the smoke exhaust neck. COAXIAL EXHAUST SYSTEM SPLIT EXHAUST SYSTEM Pag. - Page 49 Manuale Didattico – ACO Manuale didattico CLAS COAXIAL 80/100 e 80/125 TWIN PIPE 80/80 FUME Length (L) TYPE OF DIAPHRAME EXHAUST from [m] to [m] [mm] Ø44 0,75 60/100 COAXIAL C12,C32,C42 SYSTEMS 0,75 Ø44 0,75 80/125 COAXIAL C12,C32,C42 ...
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Page 50: Exhaust Systems (Cf Open Chamber)
Training manual CLAS FUME Length (L) TYPE OF DIAPHRAME EXHAUST from [m] to [m] [mm] Ø44 0,75 60/100 COAXIAL C12,C32,C42 SYSTEMS 0,75 Ø44 0,75 80/125 COAXIAL C12,C32,C42 SYSTEMS Ø44 0,5 / 0,5 9 / 9... -
Page 51: Electric And Electronic System
Manuale Didattico – ACO Manuale didattico CLAS 6 ELECTRIC AND ELECTRONIC SYSTEM MAIN CARD The boiler uses a GALILEO-MCU electronic card for complete checking of the boiler and of the one user interfaces display (3 Digit). The GALILEO-MCU electronic card is protected by two 2A, 250 VAC fuses and a VDR protects the card against supply voltage peaks up to 275VAC. -
Page 52: Electric Diagram Ff (Till June 2009)
Training manual CLAS 6.1.1 ELECTRIC DIAGRAM FF (till June 2009) Pag. 52 di 71... -
Page 53: Electric Diagram Ff (From July 2009)
Manuale Didattico – ACO Manuale didattico CLAS 6.1.2 ELECTRIC DIAGRAM FF (from July 2009) Pag. 53 di 71... -
Page 54: Electric Diagram Cf (Till June 2009)
Training manual CLAS 6.1.3 ELECTRIC DIAGRAM CF (till June 2009) Pag. 54 di 71... -
Page 55: Electric Diagram Cf (From July 2009)
Manuale Didattico – ACO Manuale didattico CLAS 6.1.4 ELECTRIC DIAGRAM CF (from July 2009) Pag. 55 di 71... -
Page 56: Peripherals Connection
Training manual CLAS PERIPHERALS CONNECTION It is possible to connect the peripherals below: Room thermostat; Crono-thermostat (available also wireless version); Room sensor (available also wireless version); Outdoor sensor; Remote control. 2 zones clip-in Solar clip-in... -
Page 57: Menu
Manuale Didattico – ACO Manuale didattico CLAS MENU To set-adjust and visualize the parameters that regulate the operating logic, the UNO PLUS version boiler has different menu. The technicians can find below the description of all the programs on the menu. -
Page 58: Description Of The Programs On Menu 2: Boiler Parameters
Training manual CLAS 6. To modify the parameter selected press button “MENU/OK” and then with pushbuttons “+” and “-“ you can change the value. 7. To memorize the parameter change press button “MENU/OK” 8. To exit from menu press button “ESC”... - Page 59 Manuale Didattico – ACO Manuale didattico CLAS CENTRAL HEATING – PART 1 Absolute maximum heating 0 ÷ 99 paragraph power 5.3.9 Maximum heating power 0 ÷ 99 (heating absolute maximum paragraph power percentage) (%) 5.3.9 0: manual (set with par. 2 36)
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Page 60: Description Of The Programs On Menu 3: Solar And Storage
Training manual CLAS 6.3.3 Description of the programs on MENU 3: SOLAR AND STORAGE Default Operation Regulating range value GENERAL SETTING 40 ÷ 65 Storage set-point temperature Storage-out Delta temperature 0 ÷ 25 (only with solar) setting With button “+” or “-“ set: 2 3 4... -
Page 61: Description Of The Programs On "Menu 4": Zone 1 Parameters
Manuale Didattico – ACO Manuale didattico CLAS Description of the programs on “MENU 4”: ZONE 1 PARAMETERS 6.3.4 Default Operation Regulating range value ZONE 1 TEMPERATURE SET-POINT Day room temperature setting 10 ÷ 30 (ON) zone 1 heating Night room temperature setting 10 ÷... -
Page 62: Description Of The Programs On "Menu 5": Zone 2 Parameters
Training manual CLAS Description of the programs on “MENU 5”: ZONE 2 PARAMETERS 6.3.5 Default Operation Regulating range value ZONE 2 TEMPERATURE SET-POINT Day room temperature setting 10 ÷ 30 (ON) zone 2 heating Night room temperature setting 10 ÷ 30 (OFF) zone 2 heating 35 ÷... -
Page 63: Description Of The Programs On "Menu 7": Test And Utility
Manuale Didattico – ACO Manuale didattico CLAS ZONE 2 DEVICES MENAGEMENT Operation mode-test zone 2 Manual Valve control zone 2 Pump control zone 2 Kp Valve control zone 2 MULTIZONE Hydraulic compensator temperature Flow temperature offset Description of the programs on “MENU 7”: TEST AND UTILITY 6.3.6... - Page 64 Training manual CLAS BOILER’S TEMPERATURE Temperature set on heating (°C) (only visualization) Temperature measured on (only visualization) heating delivery (°C) Heating return measured (only visualization) temperature (°C) Sanitary measured temperature (only visualization) (°C) SOLAR AND STORAGE (if present) Storage measured temperature (only visualization) (°C)
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Page 65: Boiler Protection Systems
Manuale Didattico – ACO Manuale didattico CLAS BOILER PROTECTION SYSTEMS There are two types of errors for malfunctions: - Shutdown (solved by resetting); - Safety stop (No Reset: the boiler will start working again properly when the cause is removed). - Page 66 Training manual CLAS ELECTRONIC CARD 3 01 Eeprom display error No Reset GP – GIU communication error 3 02 No Reset 3 03 PCB internal error No Reset 3 04 More than 5 resets executed in 15 minutes No Reset...
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Page 67: Interface Display Indications
Manuale Didattico – ACO Manuale didattico CLAS INTERFACE DISPLAY INDICATIONS During normal operation of the boiler the multifunction display shows the operating state of the boiler. DISPLAY BOILER OPERATING STATE STAND-BY. No heating request. The two numbers on the right side indicate the temperature read by the primary exchanger outlet probe (NTC1). -
Page 68: Periodical Checking
Training manual CLAS 7 PERIODICAL CHECKING Plate heat exchanger When : Every year How : To measure DT according to data inside the training module. By pass & Safety valve When : Every year How : Visual aspect / Cleanness... - Page 69 Manuale Didattico – ACO Manuale didattico CLAS Air pressure switch When : Every year How : Visual aspect / Pipe Cleanness / DP according data inside the training module When : Every year How : Visual aspect – Turbine / Cleanness...
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Page 70: Technical Data Table
Training manual CLAS 8 TECHNICAL DATA TABLE 24 CF Model name General CE certification (pin) 1312BR4794 notes Boiler type 11bs Nominal heat input max/min (Hi) 25,8/11,2 Nominal heat input max/min (Hs) 28,7/12,4 Sanitary heat input max/min (Hi) 27,0/11,0 Sanitary heat input max/min (Hs) -
Page 71: Pag. 2 Di
Manuale Didattico – ACO Manuale didattico CLAS 24 FF 24 FF (from (to Feb. 28 FF Model name Mar. General 2008) 2008) notes 1312BR479 1312BR479 1312BR479 CE certification (pin) Boiler type Nominal heat input max/min (Hi) 25,8/11,0 25,8/11,0 30,0/13,0 Nominal heat input max/min (Hs)
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