General Information
6720813172 (2015/04) 3
If you smell gas!
▶ Call the National Gas Emergency Service on:
0800 111 999
▶ Extinguish any naked flames
▶ Do not smoke or strike matches
▶ Do not turn electrical switches on or off
▶ Open doors and windows
▶ Keep people away from the affected area
▶ Turn off the gas control valve at the meter
Boiler Operation
This boiler must only be operated by a responsible adult who has been
instructed in, understands and is aware of the boiler's operating
conditions and effects.
Combustible and Corrosive Materials
Chemically aggressive substances can corrode the boiler and invalidate
any warranty.
▶ Do not store or use any combustible materials (paper, thinners,
paints etc.) inside or within the vicinity of the boiler.
Fittings and Modifications
Only a competent engineer in accordance with the Gas Safety
(Installation and Use) Regulations can remove the outer case and carry
out any work.
▶ Do not open the appliance.
Any misuse or unauthorised modifications to the boiler, flue or
associated components and system will invalidate the warranty.
▶ Do not modify the boiler or flue system in any way.
Worcester, Bosch Group accepts no liability arising from any such
actions. This does not affect your statutory rights.
CE label
The appliance complies with the basic requirements of the relevant
European directives.
Conformity has been substantiated by the proper documents which -
together with the declaration of conformity - are filed with the
manufacturer.
Abbreviations
• CH (boiler) flow = Central Heating flow
• CH return = Central Heating return
• DHW outlet = Domestic Hot Water warm outlet
• MCW inlet = Mains Cold Water inlet
• UBA 3 = Universal Burner Automat 3.
2 General Information
Servicing
▶ The boiler must be serviced regularly by a competent, qualified
person, such as a Worcester service engineer or other Gas Safe
registered engineer.
▶ Always use original spares, to help maintain the economy, safety and
reliability of the boiler and have the Service Record completed in the
Installation Checklist.
3 Energy efficiency
The following product data satisfy the requirements of the EU Regulations No. 811/2013, No. 812/2013, No. 813/2013 and No. 814/2013
supplementing Directive 2010/30/EU.
Ensure that the service engineer completes the Service
Record after each service.
The Installation Checklist and service interval record can
be found at the rear of the Installation, Commissioning
and Servicing Instructions.
Product data Symbol Unit 7736700642 7746900822 87470248 87470250
Product type – – GB162-50
G20
GB162-65
G20
GB162-80
G20
GB162-100
G20
Condensing boiler – –Yes Yes Yes Yes
Rated heat output P
rated
kW 47 61 82 95
Seasonal space heating energy efficiency η
s
%93 92 – –
Energy efficiency class – –A A––
Useful heat output
At rated heat output and high temperature regime
1)
1) High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
P
4
kW 46.6 60.5 82.0 94.5
At 30 % of rated heat output and low temperature regime
2)
2) Low temperature means for condensing boilers 30 °C, for low-temperature boilers 37 °C and for other heaters 50 °C return temperature (at heater inlet).
P
1
kW 15.4 20.1 26.6 31.6
Useful efficiency
At rated heat output and high temperature regime
1)
η
4
% 87.3 87.3 88.2 88.4
At 30 % of rated heat output and low temperature regime
2)
η
1
% 97.3 97.3 97.3 98.3
Auxiliary electricity consumption
At full load el
max
kW 0.045 0.073 0.100 0.145
At part load el
min
kW 0.021 0.019 0.024 0.027
In standby mode P
SB
kW 0.008 0.004 0.008 0.008
Other items
Standby heat loss P
stby
kW 0.085 0.082 0.082 0.082
Ignition burner power consumption P
ign
kW 0.000 0.000 0.000 0.000
Emissions of nitrogen oxides NOx mg/kWh 15 36 42 49
Sound power level, indoors L
WA
dB(A) 54 60 – –
Table 2 Product data for energy consumption
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