Pressurized boiler LR

12 models from 530 to 3000kW

  • Ygnis renowned quality, longevity, engineering and reliability throughout all ranges
  • Models LR and LRR with efficiencies in excess of 93% ncv. (output 530 kW to 10 000 kW)
  • No minimum flow rate is required for any boiler, eliminating shunt pump and extra system costs etc.
  • Ygnis unique hydraulic design for thermal stress and cold spots elimination
  • Advanced three-pass heat exchanger for consistent and optimum performance
  • Modulation: Down to 18% for gas, and 40% for oil
  • Optional advanced system control modules compatible with major BMS systems
  • All models suitable for weather compensation

Standard supply

WR - LR is supplied with

  • Insulated jacket (100mm), insulated rear door and flue box
  • Door opening on left or right
  • Burner plate with drilled holes if specified on order



Navistem B1000 controls system


As an option, LR plus can be equipped with Navistem B1000 or with Navistem B2000 controls system. 

Navistem B1000 regulator benefits:

  • Easy-to-use thermostat module for boilers with 1 or 2 power levels
  • Ensure boiler safety against overheating
  • Timer and pulse meter (optional)

Standard supply:

  • 2 power levels control thermostat (max 95 °C)
  • Safety thermostat 110 °C
  • Fuses
  • Main switch
  • Burner fault indicator
  • External fault indicator
  • Overheating indicator
  • Water thermometer
  • Fault relays
  • 3.20 m capillary pipes


Navistem B2000 controls system


Navistem B2000 regulator benefits:

  • Simple to install and economical: many built-in functions (cascade,V3V control, etc.)
  • Easy to use: interface in clear text, self-detection of sensors
  • Adapted to any type of burner: 1 or 2 power levels, 3-point modulation or 0/volts
  • Ensure boiler safety monitoring temperatures, reduction of number of cycles

Standard supply

  • Thermostat module, including fuses, safety thermostat, 110 °C, main switch, burner fault indicator, external fault indicator, overheating indicator, water thermometer, fault relays, capillary length 3.20 m.
  • RVS 63 regulator
  • User interface in clear text
  • QAZ 36 sensor (boiler sensor)
  • 3 programmable relay outputs
  • 4 dedicated sensor inputs
  • 4 programmable sensor inputs
  • 2 programmable digital inputs (1 possible at 0/10 Volts)
  • Inputs for room temperature sensors


Details & Warranty

Details & Warranty

  • Heating element: 3 years warranty can be extended to 10 years
  • Electrical equipment + burner: 2 years