Conventional wall mounted gas combi boiler
CGU-2K

ComfortLine conventional wall mounted gas combi boiler

Model / Performance

CGU-2-10
CGU-2K-18
CGU-2K-24

KEY FACTS
Specification
Downloads

Conventional wall mounted gas combi boiler for open flue operation
Tested to current EC directives
Electronic ignition and monitoring
Water-cooled, atmospheric premix burner for natural gas E, LL and LPG
Wolf low NOx unit with Hydro Tec system designed for the cleanest combustion
Control unit with eBus capability for connection to Wolf digital control accessories
Modulating controlled output in heating and DHW mode
Equipped as standard with variable high efficiency pump, 3-way changeover valve,
10 litre expansion vessel
Easy installation and operation
Electronic output matching, no adjustment necessary at the gas combination valve
High standard seasonal efficiency [to DIN] up to > 94 % (net cv) / 85 % (gross cv) for the best possible energy efficiency
Emissions to NOx class 5 White (RAL 9016) powder-coated casing
High energy efficiency and compact design

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Conventional wall mounted gas combi boiler CGU-2K

TYPE		CGU-2-10	CGU-2K-18	CGU-2K-24
Energy efficiency class, central heating		C	C	C
Energy efficiency class, DHW heating		-	A	A
Output range	kW	7.5-10	43313	10.9-24
Input range	kW	8.3-11.2	8.8-20.2	12.0-26.5
Heating flow outside diameter	G	¾"	¾"	¾"
Heating return outside diameter	G	¾"	¾"	¾"
DHW connection or cylinder flow	G	¾"	¾"	¾"
Cold water connection or cylinder return	G	¾"	¾"	¾"
Gas connection	G	¾"	¾"	¾"
Flue gas connection	mm	110	110	130
Air/flue pipe connection	mm	-	-	-
Air/flue gas routing	Type	B11BS	B11BS	B11BS
Gas category		II2ELL3P	II2ELL3P	II2ELL3P
Gas supply details
Natural gas E/H (net cv = 9.5 kWh/m³ = 34.0 MJ/m³)	m³/h	1,3	2,1	2,8
Natural gas LL (net cv = 8.1 kWh/m³ = 31.0 MJ/m³)	m³/h	1,5	2,3	3,1
LPG P (net cv = 12.9 kWh/kg = 46.3 MJ/kg)	kg/h	0,8	1,5	2,1
Gas supply pressure, natural gas	mbar	20	20	20
Gas supply pressure, LPG P	mbar	50	50	50
Standard seasonal efficiency [to DIN] at 75/60 °C (net cv/gross cv)	%		93 / 85	94 / 85
Residual head for heating circuit: high efficiency pump (EEI < 0.23)
430 l/h pump rate (10 kW at Δt = 20 K)	mbar	250	250	-
770 l/h pump rate (18 kW at Δt = 20 K)	mbar	-	250	250
1030 l/h pump rate (24 kW at Δt = 20 K)	mbar	-	-	250
DHW flow rate	l/min	-	2.7-5.8	2.7-7.7
Max. operating pressure	bar		3	3
Max. DHW temperature 1)	°C	-	55	55
Expansion vessel, nominal capacity	l	10	10	10
Expansion vessel, pre-charge pressure	bar	0,75	0,75	0,75
Required draught for the heat generator	Pa	1,5	1,5	1,5
Flue gas temperature 2)	°C	84 / 101	80 / 123	80 / 125
Flue gas mass flow rate 2)	g/s	12.8 - 13.1	12.8 / 13.9	15.0 / 19.0
NOx class		5	5	5
Power consumption (standby / max.)	W	30468	30468	30468
IP rating	IP	IP X4D	IP X4D	IP X4D
Total weight	kg	39	39	41
Electrical connection		230 V / 50 Hz

Conventional wall mounted gas combi boiler CGU-2K

Conventional wall mounted gas combi boilerCGU-2K

ErP product datasheet

CGU-2K-24 ErP label

CGU-2K-18 ErP label

CGU-2-10 ErP product datasheet

CGU-2-10 ErP label

Conventional wall mounted gas combi boiler
CGU-2K