Wolf CGB-2K-20 ComfortLine Gas Condensing Combi Boiler, with high-efficiency heating circuit pump

Factory-set for natural gas E, LL, convertible to LPG.
with integrated stainless steel domestic hot water heat exchanger for demand-driven hygienic domestic hot water preparation constant tap temperature due to precise flow regulation For space heating with connection option for a separate unvented hot water cylinder.
Tested according to EC directives and DIN EN 483 for heating systems according to DIN EN 12828 with flow temperatures up to 90° C and 3 bar permissible operating pressure, suitable for continuously lowered operation down to room temperature.
Power modulatingly controlled, gas-adaptive, self-calibrating combustion control with premix burner for extremely low pollutant emissions and changing gas quality, sealed combustion chamber for room air-dependent and -independent operation.
Speed-controlled fan.
Casing white RAL 9016 powder-coated.
High standard efficiency up to 110% (Hi) / 99% (Hs) for best possible energy utilization.
Conditions of the "Blue Angel" ecolabel according to RAL UZ61 when operating with natural gas.
Low CO and NOx emissions.
Continuously modulating heat output from 1.8 kW.
Lowest power consumption in standby mode of 3W.
Modulating high-efficiency pump (EEI < 0.23) for automatic adjustment of the volume flow.
For maintenance, the heating water heat exchanger can be swiveled out under system pressure without draining heating water.
Easy maintenance due to coated heating water heat exchanger Wolf "ALUPro".
Fast installation, simple operation and maintenance with convenient access to all components.
Easy flue gas measurement from the outside without opening the device.
Optimal condensing technology utilization through spread control without bypass valve.
Suitable for multiple occupancy according to DVGW worksheet G635 due to integrated flue gas backflow prevention.
Warning message for low water pressure by electronic heating water pressure sensor.
Integrated 3-way diverter valve for switching between heating and domestic hot water mode.
Control with gas burner automatic, electronic ignition and ionization flame monitoring, 10l expansion vessel, hanging brackets, pressure gauge for the heating circuit, electronic pressure sensor, integrated connection piece of the air/flue gas duct with concentric connection DN60/100 with measuring openings. Prepared for the installation of the LAN/WLAN module ISM-7i for communication via smartphone, laptop, PC or the Internet.
An operating module BM-2 or a display module AM is required for operation.
Technical data:
Energy efficiency class: Space heating A, Water heating A
Heat exchanger coated
Nominal heat output (heating/hot water operation)
at 80/60°C: 3.8 - 18.9kW
at 50/30°C: 4.4 - 20.4kW
Nominal load: 22.2kW
min. heat load (mod.) 3.8kW
Flue gas temperature (Qmax/Qmin)
at 80/60°C: 70/50°C
at 50/30°C: 30/25°C
Standard efficiency (HI/Hs)
at 40/30°C: 110/99%
at 75/60°C: 107/96%
Max. flow temperature: 90°C
Max. total overpressure: 3.0bar
Expansion vessel content: 10L
Heating water heat exchanger content: 1.3L
Residual head for high-efficiency pump EEI