Unical X 24 C Low Nox 24 KW LPG Condensing Boiler - Complete with Flue Gas Exhaust Kit

Technical Features

• Model

  Unical X 24 C Low Nox LPG Condensing Boiler Complete with Flue Gas Exhaust Kit

• Energy Efficiency

  Minimum/nominal useful power in condensation kW 5 ÷ 25.2
  Seasonal space heating energy efficiency ηs % 91
  Seasonal heating efficiency class Useful thermal power in high temperature regime (Tr 60°C / tm 80°C) P4 kW 23.2
  Efficiency at nominal thermal power in high temperature regime (Tr 60°C / Tm 80°C) η4 % 87.0
  Useful power at 30% of the nominal thermal power in low temperature regime (Tr 30°C) P1 kW 7.7
  Efficiency at 30% of nominal thermal power in low temperature regime (Tr 30°C) η1 % 96.1

• Performance

  Nitrogen oxide emissions ref. PCS NO x mg/kWh 22
  Declared load profile XL
  Seasonal domestic hot water efficiency class DHW production in cont. Dt 25 K (mixed) l/min 13.2
  Expansion vessel capacity 10 l
  Max condensate production kg/h 3.86
  Heating circuit pressure (min/max) bar 0.5 / 3.0
  Sanitary circuit pressure (min/max) bar 0.5 / 6.0
  Degree of protection IP X5D NO class x 6

• Dimensions

  Dimensions (HxWxD) mm 700x420x345 Net weight 34 kg

General Features

• X UNICAL
  
  
  
  X for INOX, like the exchanger that is the engine of this wall-mounted condensing boiler. X is available in a combined instantaneous version (13.2 l/min), and works with both methane and LPG (conversion kit included).
  
  Characteristics:
  

• Premix Low NOx burner (Class 6) IPX5D (also for outdoor use)
  

• Compact size and compatible with other Unical models (ideal for replacements)
  

• Unified jig and connections (Unical KONm / KONe)
  

• Minimum thermal power regulation in heating function
  

• Electronic antifreeze for operation up to -15
  

• Management of 2 zones with differentiated priority (high and low temperature)
  

• Electronics with HWS “Hot Water Speed” function to eliminate delays in DHW production and automatic “air vent” function
  

• Layout designed with large spaces for easy maintenance. Wide choice of accessories including:
  - both modulating and on/off control thermostats
  - external probe for managing both the boiler and one or two high/low temperature zones
  

STAINLESS STEEL EXCHANGER

• Stainless Steel Heat Exchanger/Condenser
  
• Electronic ignition and control of single-electrode flame
  
• Modulation ratio 1:5.2
  
• Total premix burner with constant combustion ratio, modulating electro-pneumatic gas valve and modulating fan
  
• Minimum thermal power regulation in heating function
  
• HWS “Hot Water Speed”: to eliminate delays in DHW production
  
• Three-way diverter valve
  
• 12-plate stainless steel secondary heat exchanger with “thermal length”, optimised for condensation,
  
• 2 zone management: High/low temperatures with differentiated priority
  
• Electronic antifreeze function
  
• Operation down to -15°
  
• Anti-blocking function of the pump
  
• Pump post-circulation function
  
• Safety limit thermostat
  
• Flow temperature sensor
  
• Return temperature sensor
  
• Sanitary temperature sensor
  
• Modulating circulator based on power demand, managed by high-efficiency on-board electronics compliant with ERP 2015 directive.
  
• 10 litre expansion vessel
  
• Automatic deaerator
  
• Safety pressure switch against lack of water
  
• 3 bar safety valve
  
• Control panel equipped with display with function selector and temperature adjustment potentiometer and unlock button
  
• Hydrometer
  
• Condensation drainage siphon