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Gas condensing boiler ITALTHERM City Class KR-35 KR with the option to connect a storage water heater
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Gas condensing boiler ITALTHERM City Class KR-35 KR with the option to connect a storage water heater
For heating and hot water preparation
Advantages:
- Stainless steel heat exchanger
- Certified “Range rated“
- I.C.S – automatic combustion system
- High-efficiency modulating circulation pump (ERP)
- Power modulation 1:10
- Brass hydraulic group!
- 6 NOx class according to UNI EN 15502-1
- Electrical protection class IP X5D
- “Bypass”
- Automatic three-way valve
- Flow regulator
- Boiler dimensions (mm): 700 x 400 x 300
- “Gas adaptation” function (“City Class” boilers can operate with all types of gas, no need to change nozzles)
- “Holiday program” function
- “Frost protection” function
- “Chimney cleaning” function
- Ability to connect a room thermostat (wired or wireless)
- Ability to connect an outdoor thermostat
- Easy boiler maintenance
- Can connect and control separate heating system zones (e.g. radiator and underfloor heating with additional accessories)
- Water filter easily removable
- Design: Giorgetto Giugiaro. Compact and elegant.
STAINLESS STEEL HEAT EXCHANGER
The employees of “Italtherm” designed a stainless steel heat exchanger with an extremely high water flow capacity: the internal part of the heat exchanger was increased by 4 times compared to other competitors.
Thanks to the new heat exchanger, “City Class” has better heat transfer and provides better protection against heat exchanger scaling, making “City Class” condensing boilers ideal for replacing boilers in old systems.
The design of the new heat exchanger ensures:
- high flow
- low hydraulic load losses
- easy cleaning and technical maintenance of the boiler.
ICS - AUTOMATIC COMBUSTION SYSTEM
The engineers of “Italtherm” developed the “ICS – automatic combustion system”, which turns the “City Class” boiler into a smart boiler that automatically controls, adjusts, and adapts.
“ICS – automatic combustion system” controls combustion parameters and regulates gas flow so that the boiler always receives the correct air-to-gas ratio, thus achieving:
- lower gas consumption
- lower CO / CO2 emissions
- faster boiler adjustment
BRASS HYDRAULIC GROUP
The company “Italtherm” aims to ensure the highest reliability and durability of its products, which is why it uses brass in the hydraulic group.
The new brass hydraulic group is equipped with:
- high-efficiency pump (with Erp labeling)
- three-way valve
- by-pass” bypass circuit valve
- boiler/system water refill tap
- check valve
- flow regulator
- NTC DHW sensor
TECHNICAL DATA
|
Model |
City Class 25 KR |
City Class 35 KR |
|
|
Gas type |
G20 |
G20 |
|
|
Maximum thermal power for hot water preparation |
kW |
25.0 |
33.2 |
|
Maximum thermal power for heating |
kW |
20.0 |
28.0 |
|
Minimum thermal power for heating |
kW |
2.5 |
3.5 |
|
Maximum thermal power (60°/80°C) |
kW |
19.4 |
27.4 |
|
Minimum thermal power (60°/80°C) |
kW |
2.4 |
3.3 |
|
Maximum thermal power (30°/50°C) |
kW |
21.0 |
29.5 |
|
Minimum thermal power (30°/50°C) |
kW |
2.7 |
3.7 |
|
NOX Class |
6 |
6 |
|
|
EFFICIENCY |
|||
|
Nominal efficiency (60°
CityClass35KR
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