Related Manuals for Italtherm CITY CLASS Series
Summary of Contents for Italtherm CITY CLASS Series
- Page 1 SERVICE Manual CITY CLASS 25 K - 30 K - 35 K 25 KR - 35 KR Green Heating Technology...
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Page 2: Table Of Contents
Table of Content Available models � � � � � � � � � � � � � � � � � � � � � � � � � � 2 Gas valve � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 20 PCB configuration �... -
Page 3: Pcb Configuration
PCB Configuration Code At every power on, display shows PCB configuration code, check if the matching with adhesive is correct as shown in the picture here below. Configuration Code is placed close to the control panel and it is visible leaving metal cover 30 170 30 170 31 170... -
Page 4: Check List Firs Ignition
Check list first ignition Installation done under country regulation in force 60 mm silicon gasket correctly installed No leakage between part of the system (extension, bends and flanges) Flues and Air system Avoiding flues recirculation, respecting the minimum distances between the flues and air pipes with split configuration and between air/flues pipe and walls with the concentric configuration Correct plant pressure with cold system temperature... -
Page 5: Advided Procedure On The Field
Advised procedure on the field AUTOMATIC CALIBRATION = Boiler Calibration Based On Tolerances Of Components MANUAL CALIBRATION = System Calibration Based On Flues Configuration Features CHECK COMBUSTION = Manual Operation By Technician With Flues Tester ADVISED PROCEDURE ON BOILER COMPONENTS REPLACED CHECK COMBUSTION If necessary, Main PCB... -
Page 6: User Guide
User Guide The front control panel: PUSHBUTTONS Stand-by / Functioning mode At every press, the boiler switches its mode from summer or winter mode. CH setting To set the CH system temperature. If the Outdoor Sensor Kit was installed, see also "Outdoor Sensor Kit" on page DHW setting To set the DHW temperature. -
Page 7: Access To The Inside Of The Boiler
Access to the inside of the boiler Unscrew the casing fixing screws 1 and 2; pull the casing 3 outwards, then push it upwards (to unhook it from the tongues 6) and remove it; unscrew the screws 5 and 6, then slide the control panel 7 upwards and overturn it downwards. Then it’s possible to remove the support 8 to better access the components;... -
Page 8: Boiler Internal Components K
Boiler internal components K 17 DHW temperature sensor Flue connection flange Plug for Combustion analysis (air intake) 18 System pressure gauge Plug for Combustion analysis (flue) 19 Filling valve Expansion Vessel 20 By-pass (in-built in the 3-way valve hydraulic assembly) Water drain pipe from air intake flange 21 DHW exchanger 22 Motorized 3-way valve... -
Page 9: Boiler Internal Components Kr
Boiler internal components KR Flue connection flange 17 By-pass (in-built in the 3-way valve hydraulic assembly) Plug for Combustion analysis (air intake) 18 Motorized 3-way valve Plug for Combustion analysis (flue) 19 Siphon for condense outlet Expansion Vessel 20 Manual Venting Device (Combustion assembly) Water drain pipe from air intake flange 21 Temperature Sensor, system flow 22 Safety thermostat on system flow... -
Page 10: Hydraulic Components K
Hydraulic components K 1 Flue connection flange 24 Manual Venting Device (Combustion assembly) 4 Expansion Vessel 25 Temperature Sensor, system flow 5 Water drain pipe from air intake flange 26 Safety thermostat on system flow 6 Fan 27 Air intake hose 7 Air/Gas Mixing device 51 Flue hood 8 Temperature Sensor on system return... -
Page 11: Hydraulic Components Kr
Hydraulic components KR M RB 1 Flue connection flange 71 Flue hood 4 Expansion Vessel 72 Combustion chamber 5 Water drain pipe from air intake flange 73 Burner 6 Fan 74 Primary exchanger 7 Air/Gas Mixing device 75 Gas pipe 8 Temperature Sensor on system return 76 Inlet of water from air intake in the condense siphon... -
Page 12: Electrical Diagram K
Electrical diagram K 30 25 6.1 Fan - supply SE To optional outdoor temperature sensor 6.2 Fan - speed control TA2 To optional room thermostat for zones with different temperature range 8 Temperature Sensor on system return AUX Input for optional device, configurable with 11.1 Pump - supply Parameter 46 11.2 Pump - modulation control... -
Page 13: Electrical Diagram Kr
Electrical diagram KR 26 21 6.1 Fan - supply 64 DHW Storage thermostat (*) (**) 6.2 Fan - speed control TA Room thermostat: (or Chronothermostat) SELV simple contact. Closed contact = heating request. 8 Temperature Sensor on system return or Remote control (original accessory only) 9 Loss of water pressure switch (*) SE To optional outdoor temperature sensor 12.1 Pump - supply... -
Page 14: Electrical Connection Between The Boiler And Storage Unit
. Even if the storage unit is NOT supplied by Italtherm, it’s necessary to use the original temperature sensor kit (NTC R=10 kOhm at 25°C, ß=3435). Only if the STB input is used, it’s necessary to remove the factory-installed resistor, that otherwise must be left installed. -
Page 15: Draining The Heating System Kkr
Draining the heating system When it is necessary to drain the heating system, proceed as described here below: Connect a rubber pipe to the draining tap terminal 1 ; put the other end of the pipe in a suitable drain or sink; open the draining tap by turning the nut 2 counterclockwise, using a suitable spanner;... -
Page 16: Hydraulic Components
Hydraulic components Green Heating Technology SERVICE Manual City Class... -
Page 17: Dismounting And Mounting
Dismounting & mounting DHW EXCAHNGER TOOLS tools suggested: allen key 4 mm - antiscale liquid for cleaning DISMOUNTING discharge boiler water from both side (DHW and CH) see procedure • rotate safety 3 bar (D) 90* clockwise to show the right fixing screw by hands •... -
Page 18: Combustion Components
Combustion components Green Heating Technology SERVICE Manual City Class... -
Page 19: Dismounting And Mounting
Dismounting & mounting MAIN EXCAHNGER TOOLS tools suggested: wrench 30 mm or ¾” - cross screwdriver - socket wrench 8 mm DISMOUNTING • leave electric supply and close the gas inlet by hands • take out fixing clip on gas pipe (A) by hands •... -
Page 20: Gas Valve
Gas valve Nozzle* ø 6 25 - 35 kW No link to type of gas but only to Boiler Power. ø 5,6 30 kW *green side on the bottom (to gas valve) Coil 1 ON/OFF + Coli 2 ON/OFF and modulating (Low Voltage supply) GAS VALVE TOOLS... -
Page 21: Siphon
Siphon SIPHON TOOLS tools suggested: cross screwdriver DISMOUNTING remove the lock nuts (A) by hands • remove the silicone tube (B) by hands • unscrewing the screws (C) you can remove the siphon from its housing cross screwdriver • open the lower lock nut (D) leads to the internal parts by hands •... -
Page 22: Gas Valve Automatic Calibration
Gas valve automatic calibration AUTOMATIC CALIBRATION = Boiler Calibration Based On Tolerances Of Components. This means that boiler checks phisical limits of Gas valve and Fan, in order to supply them with right values and getting a good combustion quality •... - Page 23 • Boiler starts AUTOMATIC Calibration - it starts calibrating appliance on Max power “HI” - then calibrating Ignition power “ME“ - finishing with Min power “LO“ • On the right of display it is shown “ - - - “ for each Power (HI, ME, LO). This means “CALIBRATION is RUNNING in this boiler power”...
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Page 24: Gas Valve Manual Calibration
Gas valve manual calibration MANUAL CALIBRATION = Boiler Calibration Based On Flues Configuration Features This means that boiler has to check if values found during AUTOMATIC Calibration are suitable for that boiler flues configuration (Fan revolutions and Gas valve Current Supply are both correct) •... - Page 25 • Boiler starts MANUAL Calibration - it starts calibrating appliance on Max power “HI” - then calibrating Ignition power “ME“ - finishing with Min power “LO“ • On the right of display it is shown “ - - - “ for each Power (HI, ME, LO). This means “CALIBRATION is RUNNING in this boiler power”...
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Page 26: How To Access The Parameters
How to access parameters Scrolling Parameters Scrolling Changing Parameters Values Storing Boiler Mode selected (summer or winter) Keep pushing buttons for 10 sec. until display is showing on the left «tS» flashing alternatively with a number (n°of Parameter) and on the right a number which is the value of Parameter selected. Pressing for scorlling Parameters. -
Page 27: Parameters K-Kr
Standard Parameter for general uses Parameters Suggested to not modify Fact Param Description Range Note settings 0 : G20 K KR Type Gas 0 ÷ 1 1 : G31 0 : Standard Range 35 ÷ 80 °C K KR CH Temperature Range 0 ÷... - Page 28 Parameters Fact Param Description Range Note settings ΔT = SET Tank – Temperature Tank ΔT for Flow Temperature max on 5 ÷ 15 Tank preparation If ΔT > (PAR26); then Temp flow = max value Minimum Flow Temperature for 5 ÷ 20 Min Temp Flow value = SET Tank + (PAR27)°C Tank preparation 0 : Disabled Function...
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Page 29: Info Menù
Parameters Fact Param Description Range Note settings 1 : 25 kW COMBUSTION Configuration K KR 0 ÷ 5 Kind of boiler 2 : 30 kW Code 3 : 35 kW Kind of boiler 2 : K (instantaneous + DHW exchanger) K KR HYDRAULIC configuration Code 0 ÷... -
Page 30: Error History
Errors history Scrolling information Activating function ating function With mode OFF press together buttons , for 5 sec. It shows last 10 errors code. 0E means last error appeared chronologically, 9E is the 10th error appeared chronologically). “Number” on the right is Code Error. Exit function keep pressing Green Heating Technology SERVICE... -
Page 31: Errors K-Kr
Errors Code Error kind Description Suggestion • Gas pressure inlet lower than required No flame ignition K KR RESET • Electrode position not correct (after 5 attempts) • PCB is not managing ignition High Water Temperature on Primary • Safety Thermostat open; check water circulation and pressure K KR RESET (Safety Thermostat) -
Page 32: Service Function
Service function FIRST STEP Technician chooses timing he would like to set for that boiler: - HOURS: when burner is ON (set by Parameter 50) - DAYS: when boiler has been installed (set by Parameter 51) SECOND STEP Function activation by Parameter 52: FACTORY PARAMETERS DESCRIPTION... -
Page 33: Parameters - Values
Parameters and value INGNITION CYCLE UM Timing post-ventilation Cleaning cycle timing at Power ON Soft ignition timing Detection current microA 3÷5 Three-way valve commutation timing DHW DEMAND (ISTANTANEOUS) ON/OFF DHW Temperature with PAR 8 = 1 °C 75° 60° ON/OFF DHW temperature with PAR 8 = 2 °C SET+3°... -
Page 34: Pump Diagram K
Accessories Remote control kit This remote control is more than a simple room thermostat. Thanks to this, it is possi- ble to manage the boiler in all its settings like DHW and CH temperature adjustment, boiler reset in case of boiler block, and of course it works as a room thermostat both in manual and weekly program mode. -
Page 35: Pump Diagram Kr
Accessories Two Relays Board Always cut-out the power supply before working on electric connections, terminals or boxes to prevent accidents to people or devices. This instruction booklet is integral and essential part of the product or kit it is supplied with and completes the information about the equipment in which the kit is installed. -
Page 36: Technical Boiler Data K
Technical data City Class 25 K City Class 30 K City Class 35 K UM Gas type CE certification 0476 CS 1134 0476 CS 1134 0476 CS 1134 Class II2HM3P (II2H3P) II2HM3P (II2H3P) II2HM3P (II2H3P) Type B23 - B23P - B53 - B53P - C13 - C33 - C43 - C53 - C63 (C13-C33-C53-C83) - C83 - C93 Working temperature range (min÷max) °C 0 ÷... - Page 37 Technical data Min water flow l/min (for the DHW function activation) Min supply pressure (for the DHW function activation) Max supply pressure Temperature selection range (min÷max) °C 30÷55 30÷55 30÷55 Flue temperature, average (DHW, ∆T 25°C) °C Flue temperature, average (DHW, ∆T 30°C) °C ELECTRICAL DATA Voltage / frequency...
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Page 38: Erp Data
Technical data City Class 25 KR City Class 35 KR UM Gas type Class II2HM3P (II2H3P) II2HM3P (II2H3P) Type B23 - B23P - B53 - B53P - C13 - C33 - C43 - C53 - C63 - C83 - C93 (◊) (◊) In C63 configuration, are allowed only the flue types equivalent to: C13-C33-C53-C83... - Page 39 Technical data GAS SUPPLY PRESSURE Nominal pressure mbar Inlet pressure (min÷max) mbar 17 ÷ 25 35÷40 17 ÷ 25 35÷40 GAS CONSUMPTION m³/h 2.64 3.51 Qmax kg/h 1.94 2.57 m³/h 0.26 0.37 Qmin kg/h 0.19 0.27 Green Heating Technology SERVICE M anual City Class...
- Page 40 ITALTHERM SpA | Via S. D’Acquisto | 29010 Pontenure (PC) Italy | P.iva - C.F. 01594830331 | Tel (+39) 0523.575611 | wwwitalthermit...
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