City Open 25 K gas boilers
Product description
Wall-mounted condensing gas boiler, ITALTHERM CITY OPEN 25K, closed type, for domestic and professional use, with advanced technology high efficiency combustion chamber! Heating and direct DHW with the highest power graduation capability even in extreme weather conditions!
Features
- Energy efficiency Heating/CHP: 105,1% / 96,1%
- Single large-section stainless steel tube combustion chamber, for zero deposit formation
- ICS (Intelligent Combustion System) guarantees perfect combustion in all conditions
- Brass hydraulic brass assembly
- Electronic gas valve for power graduation with 1:10 accuracy
- Controlled by an advanced ITALTHERM wired room thermostat (included)
- Wifi connection, with the necessary module ITALTHERM NET APP
- Resistances to anti-icing
protection at -10°C
Technical characteristics
Additional information
Technical characteristics
| Model | City Open 25 K | |
|---|---|---|
| Gas type | G20 | |
| Maximum charging power Qn 60°/80°C * | kW | 25 |
| Maximum heating charging power | kW | 20 |
| Maximum/minimum effective power 60°/80°C | kW | 19.4/2.4 |
| Maximum/minimum effective power 30°/50°C | kW | 21.0/2.7 |
| NOX class | 6 | |
| PERFORMANCE | ||
| Rated efficiency at 60°/80°C * | % | 96.1 |
| Rated output at 30°/50°C * | % | 105.1 |
| Performance at 30% of total power at 30/50°C | % | 106,4 |
| WARMING | ||
| Adjustment temperature range (min÷max) high temperature / low temperature |
°C | 35÷80 / 20÷45 |
| Expansion tank | l | 8 |
| Expansion vessel precharge | cash | 1 |
| Maximum operating pressure | cash | 3 |
| Maximum temperature | °C | 90 |
| Anti-freeze temperature on/off | °C | 5 / 30 |
| HOT WATER FOR USE | ||
| Supply for temperature rise 25°C | l/min | 14.8 |
| Supply for temperature rise 30°C | l/min | 12.0 |
| Minimum water supply (for activating the DHW function) | l/min | 2.8 |
| Minimum water pressure (to activate the DHW function) | cash | 0.2 |
| Maximum water inlet pressure | cash | 6 |
| DHW control temperature range (min÷max) | °C | 30÷55 |
| ELECTRICAL COMPONENTS | ||
| Voltage/Frequency (nominal voltage) | V/Hz | 220÷240/50 (230V) |
| Protection level | IPX5D | |
| DIMENSIONS | ||
| Width - Height - Depth | mm | 520 X 850 X 240 |
| Weight | kg | 28,4 |
| DIMENSIONS | ||
| Coaxial system (Φ60/100mm (inlet/outlet), maximum length | m | 10 |
| Separation system Φ80mm (inlet/outlet), maximum length | m | 54 |
| ERP data | ||
| Declared profile of hot water for use | XL | |
| Seasonal heating energy efficiency category | A | |
| Energy efficiency category of domestic hot water | A | |
| Seasonal heating energy efficiency grade | (ns) % | 91 |
Additional information
Condensing boiler CITY OPEN from 25 to 35 kW
The series CITY OPEN of boilers condensation external installation has been designed by the ITALTHERM on the basis of maximum reliability and trouble-free operation in extreme weather conditions. The robust outer cover is made of Electro-galvanised steel, painted with polyester paint with excellent corrosion resistance. Inside the protective casing the CITY OPEN is Equipped with the most advanced and reliable modern systems in technology of wall-mounted condensing boilers:
- automatic system ICS (Intelligent Combustion System) continuous monitoring and regulation clean combustion on maximum fuel economy
- Top rating Power 1:10
- Online valve gas suitable also for propane without changing the nozzle
- automatic filling in case of loss of pressure
- anti-pagan protection of the boiler and the hot water heater with automatic burner activation for temperatures below 5°C, or in case of gas shortage by activating the circulator.
- standard Equipment electrical resistors that protect the condensate siphon, the automatic filling system, the inlet and outlet of the water for use from blockage due to ice.
- function antiblocking a circulator and an electric three-way valve, at intervals of inactivity.
The boiler CITY ΟPEN is equipped with the new generation of high efficiency "single stainless steel tube" combustion chambers without joints, wide cross-section (4X larger than that of the pipes of conventional boilers). This design of the ITALTHERM ensures:
- ideal solution for new and old heating installations because of theSoteric "Self-immolation" and formation avoidance internal deposits, which prevent over time the development of the heat output and reduce the longevity of the boiler
- easy cleaning flame chamber
- simple and fast Maintenance
The external enclosure that supports the whole construction, as the exit of the chimney is made of sturdy cast iron aluminium.
The company ITALTHERM chooses to use in the boilers City Open brass hydraulic system, for maximum reliability, robustness and high Endurance at erosion and in low temperatures.
The new hydraulic system includes:
- Automatic and manual filling
- Grundfos inverter high efficiency circulator 7μ by speed adjustment via ICS
- Large isolated stainless steel plate heat exchanger for instant and plenty of hot water
- Electrical tripod valve by conduction
- Automatic bypass and valve Security 3 bar
- Security low pressure (Scarcity)water
- Sensors flow / water temperature of use
- Filter at the water inlet of use and filling water
- Manometer pressure indicator
To Smart room controller of ITALTHERM Included on the boiler packaging.
Brochure:
CITY OPEN 25-35 kW
