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Gas condensing centre
CGS-2L

ComfortLine gas condensing centre with DHW stratification cylinder
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  • Gas condensing centre comprising a CGB-2 wall mounted gas condensing boiler with stainless steel DHW heat exchanger and DHW stratification cylinder in a modular design
  • The "Turbostop" system provides convenient DHW heating inside the DHW stratification cylinder – better than a DHW cylinder with an internal indirect coil with 120, 160 or 200 l capacity
  • Controlled cylinder heating for optimum energy efficiency through the effective utilisation of condensing technology (European patent granted)
  • High performance factor NL = 1.3 to 2.5 for heating from 10 °C to 60 °C
  • With the CGS-2-20/160L, filling a bath tub with around 230 l of water at 40 °C only takes 10 minutes; the CGS-2-14/120L fills a bath with around 190 l of water at 40 °C in the same time
  • Lowest possible heat losses thanks to highly effective insulation technology – just 1.0 kWh standby loss in 24 hours
  • Compact layout as a wall mounted condensing boiler with stratification cylinder. Can be split easily into two modules of 35 kg and 49 kg respectively for easy installation
  • Integral heating circuit safety valve, 3 bar
Model / Performance
  • CGS-2-14/120L
  • CGS-2-20/160L
  • CGS-2-24/200L
Please choose model
Gas condensing centre CGS-2L
TypeCGS-2-14/120LCGS-2-20/160LCGS-2-24/200L
Energy efficiency class, central heating AAA
Energy efficiency class, DHW heating AAA
Rated heating output at 80/60 °CkW13,518.9/22.2 1)23.8/27.1 1)
Rated heating output at 50/30 °CkW15,220,425,8
Rated heat inputkW1419.6/23.0 1)24.6/28.0 1)
Lowest heating output (modulating) at 80/60 °CkW1.8/4.6 2)3.8/6.8 2)4.8/6.8 2)
Lowest heating output (modulating) at 50/30 °CkW2.1/5.4 2)4.4/7.4 2)5.6/7.4 2)
Lowest heat input (modulating)kW1.9/4.9 2)3.9/6.9 2)4.9/6.9 2)
Heating flow connectionG¾" (DN 20)¾" (DN 20)¾" (DN 20)
Heating return connectionG¾" (DN 20)¾" (DN 20)¾" (DN 20)
Cold water connection/DHW circulationG¾"¾"¾"
Cold water connectionG¾"¾"¾"
Gas connectionR½"½"½"
Air/flue pipe connectionmm60/10060/10060/100
Dimensions    
Depthmm635635635
Widthmm600600600
Heightmm146214621462
Air/flue gas routingTypeB23P, B33P, C13(x), C33(x), C43(x), C53(x), C63(x), C83(x), C93(x)  
Gas category II2N3PII2N3PII2N3P
Gas supply details    
Natural gas E/H (net cv = 9.5 kWh/m³ = 34.2 MJ/m³)m³/h1,442.06/2.422.52/2.95
Natural gas LL (net cv = 8.6 kWh/m³ = 31.0 MJ/m³)m³/h1,592.28/2.672.79/3.25
LPG P (net cv = 12.8 kWh/m³ = 46.1 MJ/m³)kg/h1,071.53/1.801.87/2.19
Natural gas supply pressure (permissible min./max.)mbar20 (17-25)20 (17-25)20 (17-25)
LPG gas supply pressure (permissible min./max.)mbar50 (42.5-57.5)50 (42.5-57.5)50 (42.5-57.5)
Standard seasonal efficiency [to DIN] at 40/30 °C (net cv/gross cv)%110/99110/99110/99
Standard seasonal efficiency [to DIN] at 75/60 °C (net cv/gross cv)%107/96107/96107/96
Efficiency at rated load at 80/60 °C (net cv/gross cv)%98/8898/8898/88
Efficiency at 30 % partial load and TR = 30 °C (net cv/gross cv)%108/97108/97108/97
Flow temperature, factory setting°C757575
Flow temperature up to approx.°C909090
Max. overall pressure, heating circuitbar333
Residual head for heating circuit: high efficiency pump (EEI < 0.23)    
600 l/h pump rate (14 kW at Δt = 20 K)mbar550550550
860 l/h pump rate (20 kW at Δt = 20 K)mbar-430430
1030 l/h pump rate (24 kW at Δt = 20 K)mbar--280
Max. permissible overall pressure, DHWbar101010
DHW temperature range (adjustable)°C15-6515-6515-65
Water capacity of the heating water heat exchangerl1,31,31,3
Nominal capacity of the cylinder with internal indirect coil / equivalent nominal capacityl90 / 12090 / 16090 / 200
Spec. water throughput "D" at ΔT = 30 Kl/min18,723,225,2
Continuous DHW output to DIN 4708l/h (kW)366 (14.6)560 (23.1)684 (27.8)
Performance factor to DIN 4708NL1,32,12,5
DHW outputl/10 min161199215
Standby heat loss to EN 12897kWh/24 h111
Corrosion protection, DHW heat exchanger/cylinder Stainless steel / two-layer enamel coating to DIN 4753  
Expansion vessel, total capacityl101010
Expansion vessel, pre-charge pressurebar0.75-0.950.75-0.950.75-0.95
Flue gas temperature 80/60-50/30 at Qmax°C62-4570-5076-50
Flue gas temperature 80/60-50/30 at Qmin°C30-2530-2533-27
Flue gas mass flow rate at Qmaxg/s6,28.8/10.7 1)10.9/13.0 1)
Flue gas mass flow rate at Qming/s0,91,82,3
Available gas fan draught at QmaxPa125135180
Available gas fan draught at QminPa101417
Flue gas category G52G52G52
NOx class 555
Amount of condensate at 50/30 °Cl/happrox. 1.4approx. 2.0approx. 2.4
Condensate pH value approx. 4.0approx. 4.0approx. 4.0
Power consumption on standbyW333
Maximum power consumptionW17-45/93 1)17-51/110 1)17-62/135 1)
IP ratingIPIP X4DIP X4DIP X4D
Electrical connection/fuse protection 230 V / 50 Hz / 16 A/B230 V / 50 Hz / 16 A/B230 V / 50 Hz / 16 A/B
Total weightkg84 (35+49)84 (35+49)84 (35+49)