Condensing gas boiler Varfree

8 models from 35 to 150kW

  • Stainless steel heat exchanger
  • Pre-mix modulating burner from 20 to 100% (using natural gas)
  • Circulator built into the boiler
  • Low emissions (NOx class 6)
  • Built-in boiler manager system
  • Flue connections B23/B23P/C13/C33/C53
  • Powered with natural gas or propane (Version B23/B23P only)

Standard supply

WR - VARFREE is supplied with

  • Pre-mix modulating burner (G20/G25 and propane)
  • Control panel
  • Safety thermostat
  • Gas valve
  • Condensate drain
  • Air differential pressure switch
  • Ignition electrode
  • Ionisation electrode for flame control
  • Smoke temperature sensor
  • Water outlet temperature sensor
  • Water inlet temperature sensor
  • Water differential pressure switch
  • Water pressure switch
  • Non-return valve
  • Automatic purge
  • Security valve
  • Working pressure 4 bar

Controls

WR - VARFREE

Navistem B3000 controls system

 

Varfree benefits of the newest Navistem B3000 controls system.

Benefits

  • Easy to install and economical: many integrated functions (cascade, V3V management, etc.)
  • Easy to use: interface in clear text, self-detection of sensors
  • Power demands optimisation: cascade strategies, timer and vacation programming
  • Boiler safety garantied: temperatures and flow rates monitoring, reduction of number of cycles

Standard supply

  • Display with backlit screen
  • User interface high visibility
  • 3 programmable relay outputs (1A max)
  • 2 dedicated sensor inputs
  • 2 programmable sensor inputs
  • 2 programmables digital inputs (1 possible at 0 to 10 Volts)
  • Inputs for room temperature sensors
  • Electrical protective devices integration (fuses, EMC filter)
  • Interface internal boiler wiring and external consumer wiring (LPB)
  • Mounting support

Accessories

  • AVS 75 extension module for managing V3V circuit
  • OCI 345 interface for cascade boilers communicating via LPB
  • RVS 63 kit (external to boiler) to manage supplementary circuits
  • RVS 46 kit (external to boiler) to manage supplementary circuits 

 

Details & Warranty

Details & Warranty

Warranty

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