Italtherm CITY MAX 26 K Instruction Handbook Manual
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Italtherm CITY MAX 26 K, Green Heating Technology 47 TECHNICAL DATA (cont'd) U.M. City Max 26 K City Max 32 K Gas type G20 G31 G20 G31 GAS CONSUMPTION Qmax m³/h 2.77 3.39 kg/h 2.03 2.49 Qmin m³/h 0.56 0.73 kg/h 0.41 0.53 Notes
Italtherm CITY MAX 26 K, Green Heating Technology 50 Hydraulic diagram This diagram is for informaon only. To make boiler hydraulic connecon either see "Dimen- sions and connecons" on page 14 and eventually "Posioning and fastening" on page 16. 00080 00 M M 8 55 56 51 32 54 17 18 23 22 14 10 34 11 20 16 21 30 24 31 27 13 15 58 57 52 2829 19 CF RM SC G 5350403533123736 8 Sealed chamber 10 Gas injecon pipe 11 Siphon for condense outlet 12 Temperature Sensor on system return 13 Loss of water pressure switch 14 Gas valve 15 System pressure gauge 16 Safety valve 3 bar 17 Filling valve 18 Drain valve 19 By-pass 20 Pump 21 Storage safety val
Italtherm CITY MAX 26 K, Green Heating Technology 20 Gas connecon Due to various installaon possibilies, the gas cock 3 supplied with the original Connecons Kit has a sim- ple male Ø ½” connecon, facing the rear of the boiler. The gas pipe 4, upstream the gas cock 3, should be sup- plied by the installer. While connecng the gas inlet of the boiler to the gas supply piping, it is MANDATORY to insert a PLAIN GASKET, whose dimensions and material must be adequate. Connecon is NOT s
Italtherm CITY MAX 26 K, Green Heating Technology 9 Room thermostat: it commands electrically the boiler to acvate or deacvate the heang system, in order to keep the room temperature (detected by a sensor) within a value set by the user, Regulaon in force prescribe its posioning, the temperature limits within the user can adjust it and the periods of heang. On trade are available programmable room thermostats: most of them allow to make a weekly programming of various temperature levels, besides special programs for various purposes. We suggest to choose original ITALTHERM accessories. Typical use Preliminary operaon
Italtherm CITY MAX 26 K, Green Heating Technology 29 Venng the primary exchanger When commissioning and cleaning the combus- on unit, it is a good idea to check that there is no air in the primary circuit of the combuson unit and, if necessary, to eliminate it by opening the valve 4 located on the top of the unit. f To avoid weng the sealed chamber insude, use a length of exible hose 1, with suitable diameter, on the ng 2; f slowly open the venng valve by manually turning the ferrule 3 counterclockwise; f when no more air comes out, close the vent- ing valve by manually turning the ferrule 3
Italtherm CITY MAX 26 K, Green Heating Technology 52 Remote Control Kit This remote control is more than a simple room thermostat. Thanks to this, it is possible to manage the boiler in all its set- ngs like DHW and CH temperature adjustment, boiler reset in case of boiler block, and of course it works as a room thermo- stat both in manual and weekly program mode. It’s powered by the boiler (in safety low voltage), so it doesn’t need baeries. Extract the Remote Control from its package. Keep the relevant user instrucon booklet and annex it to this Manual. Nor the Remote Control neither the relevant cable coming from the boiler must not, for any reason, be connected to the 230Vac
Green Heating Technology 33 • If the CO 2 value is HIGHER than allowed, turn the screw R.Q. ADJ. CLOCKwise; • If the CO 2 value is LOWER than al- lowed, turn the screw R.Q. ADJ. COUN- TERCLOCKwise; Remark: if you have adjusted the CO 2 at the nominal input, we advise you to check again the CO 2 and the o-set at the reduced input (steps 3 to 7). IMPORTANT: at the end of the
Italtherm CITY MAX 26 K, Green Heating Technology 51 Addendum Outdoor Sensor Kit Installaon and seng The Outdoor Sensor manages automacally the CH ow temperature** as a funcon of the outdoor temperature, thus avoiding the user to adjust it manually. This funcon is also named "shiing tempera- ture". ** that's the temperature of the heang elements. Don't mistake it with the room temperature (managed by the room thermo- stat or by the Remote Control, but not by the boiler) that doesn't depend on the
Italtherm CITY MAX 26 K, Green Heating Technology 35 HEAT INPUT FAN RPM INDICATIVE DISPLAY VALUE kW kcal/h Natural gas G20 Commercial Propane G31 City Max 32 K MIN. 6.9 5934 1500 1600 0 9.5 8170 1930 2030 10 12.0 10320 2360 2460 20 14.5 12470 2790 2890 30 17.0 14620 3220 3320 40 19.5 16770 3650 3750 50 22.0 18920 4080 4180 60 24.5 21070 4510 4610 70 27 23220 4940 5040 80 29.5 25370 5370 5470 90 MAX. 32.1 27606 5800 5900 99 Electronic sengs Accessing the main board To access the main board: Cut o the electrical supply to the boiler. Re- store the supply aer having closed the contol panel rear cover. f unscrew the screws 1 and remove the back cover o
Italtherm CITY MAX 26 K, Green Heating Technology 46 TECHNICAL DATA (cont'd) U.M. City Max 26 K City Max 32 K Gas type G20 G31 G20 G31 Expansion vessel l 10 Expansion vessel pre-loading pressure bar 1 Loss of water pressure switch o / on pressure bar 0.5 / 0.9 (±0.2) 0.5 / 0.9 (±0.2) To allow the correct system lling, the pressure of the domesc water should be higher than the ON value of the pressure switch. Max working pressure bar 3 Max system temperature °C 83 An-freezing funcon temperature on / o °C 5 / 30 HOT WATER Storage volume l 60 Specic ow rate (EN625) l/min 16 17 DHW expansion vessel l 2 DHW expansion vessel pre-loading pressure bar 3.5 (see also
Italtherm CITY MAX 26 K, Green Heating Technology 39 f when the draining is over, close the draining tap (turn it clockwise). Alarms - boiler block Following a malfuncon, the boiler can lock-up and show a parcular signalling, consisng of an alarm code on the display and of the status of the RED light indicator (and eventually of the GREEN and the YELLOW ones). In the following table, all the alarm signals are listed, their most probable causes and the suggested soluons. Each alarm code is complete of the status of the RED
Green Heating Technology 26 Adjustment and Maintenance WARNING: Hereby described operaon can be performed by qualied technicians only. When regulaon/measuring is over, remember to ghten pressure tapping point screws and to verify the absent of gas leakages only from net pressure plug (PIN, see the picture of the gas valve) and from the connecon upwards the ga
Green Heating Technology 4 Safety warnings symbols legend Generic safety warning Electrical danger (fulguraon) Physical danger (personal damage) Thermal danger (burns) General warning or advice to avoid material damage or to achieve improvements References to Laws and Norms All the references to norms and naonal laws menoned in t
Italtherm CITY MAX 26 K, Green Heating Technology 6 f Do not expose the wall hung gas boiler to water or other liquids sprinklings, or to vapours directly coming from gas cookers/hobs. f Do not obstruct the air inlet or ue outlet terminals, even momentarily or parally. f Do not put any object on the gas boiler and don't leave any ammable liquid or solid materials, (e.g. paper, clothes, plasc, polysrene) in its proximity. f This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilies, or lack of experience and knowledge, unless they have been given supervi- sion or
Italtherm CITY MAX 26 K, Green Heating Technology 45 Technical data TECHNICAL DATA U.M. City Max 26 K City Max 32 K Gas type G20 G31 G20 G31 CE cercaon 0694 CM 3400 Class II 2H3P II2H3P Type B23 - B23P - C13 - C33 - C43 - C53 - C63 - C83 - C93 Working temperature range (min÷max) °C 0 ÷ +60 Max heat input kW 26.2 26.2 32.1 32.1 Min heat input kW 5.3 5.3 6.9 6.9 Max heat output 60°/80°C * kW 25.4 25.4 31.4 31.4 Min heat output 60°/80°C * kW 5.1 5.1 6.6 6.6 Max heat output 30°/50°C * kW 27.5 27.5 34.0 34.0
Italtherm CITY MAX 26 K, Green Heating Technology 31 Do not disassemble the burner group and do not dismount the ceramic bre plate from the bot- tom of the exchanger. f check the integrity of the insulang coverings inside the combuson chamber; f on the burner cover, check the integrity of the reproof bre gasket and of the silicone rubber one; f check that the burner do not present deposits, foulings or excessive oxidaons and that all the holes are free; f clean soly the burner electrodes, avoiding to bend it or to move
Italtherm CITY MAX 26 K, Green Heating Technology 19 System lling and pressuring Once all system connecons have been carried out, proceed with the lling of the heang system and of the DHW storage. This operaon should be made with care, respecng the following steps: The operaons to completely purge the air from the heang system and from the storage coil, require the acvaon of the boiler, therefore the nal purging must be performed, by qualied technicians, during the rst starng up. DHW storage tank lling 1. Load the DHW expansion vessel (see "Boiler internal components" on page 48) to the aqueduct pressure
Italtherm CITY MAX 26 K, Green Heating Technology 17 f If the metal jig is used, hang it on the wall using the same wallplugs or hooks and the holes or slots indicated in the gure ( A for the plugs and B for the open hooks). f Fix up the connecons and all ducts for heang ow and return, cold water, hot water, gas and electrical cables, predisposing them in the holes of the metal jig or respecng the measures in the paragraph "Dimensions and connecons" on page 14. The upper edge of boiler’s
Italtherm CITY MAX 26 K, Green Heating Technology 21 Electrical connecons The link of the room thermostat works with a safety extra low voltage (SELV); connect it to the voltage free contacts of the room thermostat/chronothermostat. On NO account must any electrical voltage be applied to these terminals. All low-voltage wirings (e.g. Room Thermostat or Chronothermostat for trade) must be kept separate from power supply cables, as to avoid boiler malfunconing due to electrical noise. It is advisable to use separate tubes for them. The boiler mus
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