Worcester GB162 User manual

6720814333 (2019/05) GB
User Instructions
Wall hung gas fired condensing boiler
Commercial Boiler Series
GB162-50/65/85/100 V2

Preface
Commercial Boiler Series – 6720814333 (2019/05)
2
Preface
Dedicated to heating comfort.
Thank you for purchasing a Worcester product. We pride ourselves on
manufacturing appliances to the strictest quality control standards
throughout every stage of production.
Worcester, Bosch group has led the field in innovative product design
and performance for over 50 years. This heritage means all our products
are of exceptional quality and proven reliability.
Our products employ the latest technologies and they are reliable,
extremely energy efficient, offering you economical running costs and
value for money. They are amongst the top energy rated appliances
available.
There is also the reassurance of our parts and labour guarantee. Our
Customer Service team is here to help you get the best from your
Worcester product throughout its lifetime. Whatever your enquiry, our
specially trained team is available at our Worcester based contact centre
and online via the website. For contact details see the back cover.

Table of contents
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Commercial Boiler Series – 6720814333 (2019/05)
Table of contents 1 Explanation of symbols and safety instructions
1.1 Explanation of symbols
Warnings
In warnings, signal words at the beginning of a warning are used to
indicate the type and seriousness of the ensuing risk if measures for
minimising danger are not taken.
The following signal words are defined and can be used in this document:
DANGER:
DANGER indicates that severe or life-threatening personal injury will
occur.
WARNING:
WARNING indicates that severe to life-threatening personal injury may
occur.
CAUTION:
CAUTION indicates that minor to medium personal injury may occur.
NOTICE:
NOTICE indicates that material damage may occur.
Important information
The info symbol indicates important information where there is no risk to
people or property.
Additional symbols
Table 1
1.2 General safety instructions
HInstructions for the target group
These operating instructions are intended for the
heating system user.
All instructions must be observed. Failure to comply
with instructions may result in material damage and
personal injury, including possible loss of life.
▶ Read and retain the operating instructions (heat
source, heating controller, etc.) prior to operation.
▶ Observe the safety instructions and warnings.
HDetermined use
The product may only be used for the heating of boiler
water and for DHW heating.
1 Explanation of symbols and safety instructions . . . . . . . . . . . 3
1.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 3
2 Product Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.1 Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Benchmark standard . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.3 Appliance types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Overview of components . . . . . . . . . . . . . . . . . . . . . . . . .5
3.2 Opening the gas isolation valve . . . . . . . . . . . . . . . . . . . .6
3.3 Opening service valves. . . . . . . . . . . . . . . . . . . . . . . . . . .6
3.4 Switch on the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3.5 Check water pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.6 Setting the maximum boiler temperature . . . . . . . . . . . .6
3.7 Heating controller settings. . . . . . . . . . . . . . . . . . . . . . . .6
4 Operating the appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4.1 Information menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2 Setup menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.3 Anti-Freeze Protection . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.4 Key lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
5.1 Standard shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2 Shutting down when there is a risk of frost . . . . . . . . . . .8
6 Inspection and maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1 Refilling the heating system . . . . . . . . . . . . . . . . . . . . . . . 8
6.2 Cleaning the casing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
7 Display rendition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
7.1 Display codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.2 A fault has occurred but no fault code is displayed . . . . . 9
8 Environmental protection/disposal. . . . . . . . . . . . . . . . . . . . .10
9 Energy efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
9.1 Energy efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Symbol Meaning
▶ a step in an action sequence
a reference to a related part in the document
• a list entry
– a list entry (second level)

Explanation of symbols and safety instructions
Commercial Boiler Series – 6720814333 (2019/05)
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Any other use is considered inappropriate. We assume
no liability for damage occurring due to non-permitted
use.
HIf you smell gas
A gas leak could potentially cause an explosion. If you
smell gas, observe the following rules:
▶ Prevent flames or sparks:
– Do not smoke, use a lighter or strike matches.
– Do not operate any electrical switches or unplug
any equipment.
– Do not use the telephone or ring doorbells.
▶ Turn off the gas at the meter or regulator.
▶ Open windows and doors.
▶ Warn your neighbours and leave the building.
▶ Prevent anyone from entering the building.
▶ Move well away from the building: call the National
Gas Emergency Service on 0800 111 999.
▶ L.P.G. boilers: Call the supplier’s number on the
side of the gas tank.
HDanger to life from poisoning by flue gas
There is a danger to life from escaping flue gas.
▶Never modify any parts through which flue gas is
routed.
If flues are damaged or leaking, or if you smell flue gas,
observe the following rules.
▶ Switch off the heat source.
▶ Open doors and windows
▶ Warn your neighbours and leave the building
immediately.
▶ Prevent third parties from entering the building.
▶ Notify an approved contractor.
▶ Have any defects rectified.
HDanger to life from carbon monoxide
Carbon monoxide (CO) is a poisonous gas, which
arises during the incomplete combustion of fossil fuels
such as oil, gas or solid fuels.
Dangers arise, if carbon monoxide escapes from the
heating system due to a fault or a leak and collects
unnoticed in enclosed spaces.
You can neither see, taste nor smell carbon monoxide.
To avoid danger from carbon monoxide:
▶ Have the heating system inspected and serviced
regularly by an approved contractor.
▶ Use a CO detector, which gives an alarm in good
time if CO escapes.
▶ If you suspect a CO leak:
– Warn your neighbours and leave the building
immediately.
– Call an approved contractor.
– Have any defects rectified.
HCombustion air/ambient air
The air in the installation location must be free of
flammable or chemically aggressive substances.
▶ Do not store or use any highly flammable or
explosive materials (paper, petrol, thinners, paints
etc.) within the vicinity of the heat source.
▶ Do not store or use any corrosive substances
(solvents, adhesives, chlorinated cleaning agents,
etc.) within the vicinity of the heat source.
HInspection and maintenance
If there is a lack of cleaning, inspection or
maintenance, or if these are carried out incorrectly,
this may result in material damage and/or personal
injury, including possible loss of life.
▶ Have work carried out only by an approved
contractor.
▶ Have any defects rectified immediately.
▶ Have the heating system inspected once a year by
an approved contractor, and have any required
maintenance or cleaning work carried out.
▶ Have the heat source cleaned at least every two
years.
▶ We recommend that you enter into a contract
covering an annual inspection and needs-based
maintenance with an approved contractor.
HFittings and modification
Only a competent engineer can remove the appliance
case and carry out any work, in accordance with the
relevant Installation Regulations.
Any misuse or unauthorised modifications to the
appliance, flue or associated accessories and heating
system will invalidate the guarantee.
▶ Do not modify the appliance or flue system in any
way.
Worcester accepts no liability arising from any such
actions. This does not affect your statutory rights.
HCondensate pipe work
Condensate is produced in this boiler and removed via
a condensate pipe to a drain. Modification or blocking
of the condensate pipe work is not permitted.

Product Information
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Commercial Boiler Series – 6720814333 (2019/05)
HGeneral considerations
▶ The boiler must be installed in a well ventilated area.
The openings must be kept in good condition.
▶ The vents or any other component contributing to
the functioning of the boiler must not be reduced or
sealed.
▶ We recommend an annual service of the appliance
by an approved engineer to ensure reliable and
efficient operation.
HSafety of electrical devices for domestic use
and similar purposes
The following requirements apply in accordance with
EN 60335-1 in order to prevent hazards from
occurring when using electrical appliances:
“This appliance can be used by children of 8 years and
older, as well as by people with reduced physical,
sensory or mental capabilities or lacking in experience
and knowledge, if they are supervised and have been
given instruction in the safe use of the appliance and
understand the resulting dangers. Children shall not
play with the appliance. Cleaning and user
maintenance must not be performed by children
without supervision.”
“If the power cable is damaged, it must be replaced by
the manufacturer, its customer service department or
a similarly qualified person, so that risks are avoided.”
HPlease read these instructions carefully
▶ These instructions are applicable to the Worcester
appliance model/s stated on the front cover only.
▶ These instructions apply in the UK/IE only and must
be followed except for any statutory obligation.
2 Product Information
2.1 Declaration of conformity
The design and operating characteristics of this product comply with the
European and national requirements.
The CE marking declares that the product complies with all the
applicable EU legislation, which is stipulated by attaching this
marking.
The complete text of the Declaration of Conformity is available on the
Internet: worcester-bosch.co.uk.
2.2 Benchmark standard
The Benchmark initiative is a code of practice
to encourage the correct installation,
commissioning and servicing of domestic
central heating appliances and system
equipment.
A “checklist” is dispatched with every appliance and can be found
towards the back of the Installation, Commissioning and Servicing
Instructions. This is a vital document that needs to be completed by the
installer at the time of installation. It confirms that the appliance has
been installed and commissioned according to the manufacturer's
instructions.
The service record provides space for the recording of regular servicing
of the appliance/heating system and this can become a valuable
document when, for example, you wish to sell the property. The service
record will show a potential purchaser that the heating system has
received regular professional maintenance and servicing during its
lifetime.
The Benchmark initiative aims to:
• Raise standards among professional installers.
• Build and maintain high safety standards in the industry.
• Improve customer satisfaction levels.
• Make a contribution to the nation's commitment to climate change.
2.3 Appliance types
Table 2
This document refers to the following appliance types:
• GB162-50 V2
• GB162-65 V2
• GB162-85 V2
• GB162-100 V2
The designation of the boiler comprises the following:
• Worcester: manufacturer
• GB162 V2: product name
• 50, 65, 85 or 100: type name (output)
3 Commissioning
3.1 Overview of components
Fig. 1 Overview of components
[1] Control panel
[2] Pump
[3] Hydraulic isolation valves with temperature gauges
[4] Gas isolation valve
[5] Pressure gauge
These appliances are for use with Natural Gas or L.P.G.
(Cat. II2H3P type C13, C33 & C53)
Model Gas Council Number
Natural gas 50 kW 41-406-66
65 kW 41-406-67
0010025258-001
4 353
2
1

Operating the appliance
Commercial Boiler Series – 6720814333 (2019/05)
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3.2 Opening the gas isolation valve
▶ Push the gas isolation valve in and turn anti-clockwise until the valve
lines up with the gas line.
Fig. 2 Opening the gas isolation valve
3.3 Opening service valves
▶ Open both service valves so that the tap lines up with pipework.
Fig. 3 Opening service valves
3.4 Switch on the boiler
▶ Put the on/off switch to position “1” (figure 5, [1]).
3.5 Check water pressure
For the boiler to work efficiently, the normal water pressure must be
between 1.0 and 2.0 bar.
▶ Ask the installer whether a higher pressure is necessary.
▶ Read off the water pressure on the display (Chapter 4.1, page 7).
▶ Top up the heating system if necessary (Chapter 6.1, page 8).
Fig. 4 Read off the water pressure
3.6 Setting the maximum boiler temperature
▶ Set the maximum boiler temperature required in the setup menu
(Chapter 4.2).
The heating and DHW operations can be switched on and off
independently of one another.
3.7 Heating controller settings
Some of the functions described in this document change when
connecting a heating controller, i.e. room thermostat or weather-
compensated controls. The controls exchange parameters with the
boiler.
▶ You should therefore carefully read the operating instructions for the
corresponding heating controls.
4 Operating the appliance
Fig. 5 Control panel
[1] On/off switch
[2] Reset key
[3] Chimney sweep key
[4] Help key
[5] Display
[6] Menu key
[7] Down key
[8] Up key
[9] Diagnostic plug
[10] Burner LED
The front of the boiler contains a control panel with the following
elements:
On/off switch
The boiler can be switched on or off via the on/off switch. The power
supply is not interrupted.
Reset ckey
The boiler can be restarted via the ckey in the event of blocking faults
(Chapter 7).
Chimney sweep dkey
The boiler can be brought into operation via the d key in order to carry
out measurements. Used for servicing.
Info Lkey
The boiler status can be read out via the Lkey
Display
Display values, settings and codes can be read off the display. If the
boiler is switched on via the mains isolator, all symbols appear briefly in
the display.
0010025259-001
0010025260-001
0010020120-001
Status display
Display when the boiler is switched on (approx. 1 second)
0010025261-001
1 3 5 104 986 72

Operating the appliance
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Commercial Boiler Series – 6720814333 (2019/05)
Table 3 Readings on the display
Menu Okey
To change the settings, open the menu via the Okey.
Down Nand up Mkeys
You can navigate the various menus via the arrow keys. Press an arrow
key to change a setting or value.
Diagnostic plug
An external diagnostic tool can be connected here.
Burner LED
The Burner LED lights up when the burner is firing.
4.1 Information menu
After a few minutes of inactivity, the menu closes automatically and the
home screen is displayed.
Information on the status of the boiler can be read out via the information
menu. Proceed as follows:
▶PressLto open the information menu.
▶ Navigate the menu with Mand Nkeys in order to read out the
required data.
▶PressLto exit the information menu.
Table 4 Information menu
4.2 Setup menu
The boiler settings can be displayed and modified via the setup menu.
Proceed as follows:
▶PressOto open the setup menu.
▶ Navigate the menu with Mand Nkeys.
▶ Press and hold Oto access a setting. Once the setting flashes it can
be modified.
▶ Change the setting via Mand Nkeys.
▶PressOto save the setting. The setting no longer flashes.
The display values shown are the default settings.
 Current flow temperature [°C]
 Operating pressure [bar] (display
flashes if the operating pressure is
too low)
CChimney sweep mode (service
operation)
BBurner in operation
RCentral heating
SDHW
IPump running
TOutside temperature display
An interlocking fault has occurred
or the boiler requires a service.
Information menu
“info” is displayed for 1 second.
Maximum boiler flow temperature set [ °C]
during heating mode and chimney sweep
mode.
“OFF” appears in the display when heating
mode is switched off.
No information about DHW mode is shown
here.
Display of service code.
This information is only displayed if the boiler
requires a service intervention.
For a comprehensive overview of the display
codes and corresponding explanations see
Chapter 7.
Status display
Displays an operating code or fault code.
For a comprehensive overview of the display
codes and corresponding explanations see
Chapter 7.
Actual operating pressure [bar].
Current boiler flow temperature [ °C].
Outside temperature [ °C].
Only displayed with weather-compensated
control.
Calculated boiler flow temperature (setpoint)
[ °C] during heating mode R.
Current ionisation current [μA].
Current burner output [%] during heating
mode R. Mod = modulation
Current pump speed [%].
Mod = modulation
Setup menu
“menu” is displayed for 1 second.
Heating mode is switched on.
Setting: On, Off.
▶ Set the maximum boiler flow temperature
based on the heating system type.
Adjustment range: 30 - 90 °C.
Examples of settings:
• 40 °C underfloor heating system
• 75 - 85 °C radiators
• 85 - 90 °C convectors
Information menu

Shutdown
Commercial Boiler Series – 6720814333 (2019/05)
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Table 5 Setup menu
4.3 Anti-Freeze Protection
Parts of the line may freeze during the cold season. Water permanently
flows through the heating system which significantly reduces the
probability of freezing.
▶ Check whether all radiator valves are open.
▶ Press key Oto open the setup menu.
▶ Set the pump over-run time to 24 hours (Chapter 4.2).
If the boiler is switched off, see Chapter 5.2.
4.4 Key lock
The setup menu can be locked to prevent the settings from being
changed by unauthorised personnel. Proceed as follows:
Activation
▶ Press the Mand Nkeys simultaneously for 5 seconds. The word
“Lock” is displayed for 5 seconds. The information menu remains
readable.
Fig. 6 Display - Lock
Disable
▶ Press the Mand Nkeys again simultaneously for 5 seconds to
remove the key block; the word “Lock” disappears.
5 Shutdown
5.1 Standard shutdown
▶ Put on/off switch in position “0”.
▶ Close the gas isolation valve under the boiler (figure 2).
5.2 Shutting down when there is a risk of frost
If the boiler stays on:
▶ Set the pump over-run time to 24 hours (Chapter 4.2).
▶ Make sure that sufficient flow to all radiators is possible.
If the boiler is switched off:
▶ Put on/off switch in position “0”.
▶ Close the gas isolation valve under the boiler.
▶ Drain the entire heating system.
6 Inspection and maintenance
The user is responsible for ensuring the general safety and annual
servicing of the heating system.
Recommendations:
▶ To ensure the boiler functions correctly, maintenance should be
carried out annually by a certified installer.
▶ To do this, organise a maintenance and inspection contract.
6.1 Refilling the heating system
Every heating system is refilled with heating water in different ways,
depending on the water quality.
▶ You should therefore ask the installer to explain the refilling process
to you at system handover.
▶ If persistent refilling is required then please contact a qualified
contractor, it is likely that a leak exists.
6.2 Cleaning the casing
▶ Only clean the casing of the boiler with a damp cloth and possibly a
mild detergent.
7 Display rendition
7.1 Display codes
A display code provides information about the status of the boiler. Fault
codes are either shown in the display directly or can be called up via the
information menu. Proceed as follows:
▶ Navigate the menu to the fault code level. Press Land toggle with M
and N.
▶ Identify the fault code and search for the corresponding explanation
(table 6).
▶ Implement the solution to eliminate the fault.
There are 3 types of code:
▶ normal operating code
▶ blocking fault code
▶ interlocking fault code
For safety reasons, the boiler shuts down and locks as soon as a fault
occurs. This is indicated by an illuminated fault code. The boiler must be
reset in order to unlock it. Proceed as follows:
▶ Hold cpressed down until “rE” appears in the display. In most
cases, the boiler will work again normally following the reset.
▶ Set the maximum output of the heating
system.
The output is displayed in % when modifying
the setting.
Adjustment range: 0 - 100%.
No information about DHW mode is shown
here.
▶ Change the minimum pump speed if
required.
Adjustment range:
30 % - max. (setting max. parameter).
▶ Increase the minimum pump speed if
parts of the heating system do not
become hot enough.
▶ Change the maximum pump speed if
required.
Adjustment range:
min. (setting min. parameter):
• 50-V2 - 57%
• 65-V2 - 65%
• 85-V2 - 65%
• 100-V2 - 83%
▶ Reduce the maximum pump speed if
aggravating flow noises can be heard.
Pump over-run time following end of heating
demand [Min].
Adjustment range: 1 - 60 min./24 hours.
Setup menu
10011620-001

Display rendition
9
Commercial Boiler Series – 6720814333 (2019/05)
If the fault code still persists contact your installer, stating the appliance
type and fault code. Alternatively please contact Worcester Technical
Support (contact details on the back cover of this guide).
Table 6 Operating and fault codes
7.2 A fault has occurred but no fault code is displayed
It is possible that even though a fault code is not displayed the boiler
does not operate according to your expectations. You should then check
the following:
Heating system does not heat up
▶ Check in the information menu whether a fault code is displayed and
try to remedy the fault.
▶ Check the set boiler temperature in the setup menu.
▶ Check the settings of the heating controller by referring to its manual.
If the fault code still persists contact your installer.
▶ Note the fault code.
▶ State the appliance type and serial number. These are listed on the
right-hand side of the boiler.
Code Explanation Corrective measure
     The boiler is in heating
mode.
     The boiler is in DHW
mode.
     The boiler cannot
transfer the heat to the
heating system.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators/
heating system.
• Reset the boiler.
     The boiler is in standby
mode, there is no heat
demand.
     The boiler cannot
transfer the heat to the
heating system.
     The sensors inside the
boiler detected
unexpected
temperatures.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
    
     The boiler is waiting.
The boiler duly switches
on in order to satisfy the
heat demand.
     The boiler starts.
    
    
     The water pressure is
too low.
• Checkthe waterpressure
of the boiler and top up if
necessary.
• Reset the boiler.
     The sensors inside the
boiler detected
unexpected
temperatures.
• Checkthe waterpressure
of the boiler and top up if
necessary.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
     The sensors inside the
boiler detected
unexpected
temperatures.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
    
     The sensors inside the
boiler detected
unexpected
temperatures.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
    
     The temperature
measured by a
thermostat in the boiler
is too high.
• Checkthe waterpressure
of the boiler and top up if
necessary.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
     No burner ignition. • Check that the gas
isolator is open.
• Reset the boiler.
     The temperature
measured by the
sensors in the boiler is
too high.
• Checkthe waterpressure
of the boiler and top up if
necessary.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
    
     The sensors inside the
boiler detected
unexpected
temperatures.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
     The power was briefly
interrupted during a
fault.
• Reset the boiler.
   The water pressure is
too low.
• Checkthe waterpressure
of the boiler and top up if
necessary.
  The boiler is reset.
Code Explanation Corrective measure

Environmental protection/disposal
Commercial Boiler Series – 6720814333 (2019/05)
10
Fig. 7 Right-hand side of the boiler
[1] Serial number
[2] Device type
8 Environmental protection/disposal
Environmental protection is a fundamental corporate strategy of the
Bosch Group.
The quality of our products, their economy and environmental safety are
all of equal importance to us and all environmental protection legislation
and regulations are strictly observed.
We use the best possible technology and materials for protecting the
environment taking account of economic considerations.
Packaging
Where packaging is concerned, we participate in country-specific
recycling processes that ensure optimum recycling.
Allof our packagingmaterialsare environmentally compatible andcan be
recycled.
Used appliances
Used appliances contain valuable materials that can be recycled.
Thevariousassemblies canbe easily dismantled.Synthetic materialsare
marked accordingly. Assemblies can therefore be sorted by composition
and passed on for recycling or disposal.
Used electrical and electronic appliances
Electrical or electronic devices that are no longer
serviceable must be collected separately and sent for
environmentallycompatible recycling (in accordancewith
the European Waste Electrical and Electronic Equipment
Directive).
To dispose of old electrical or electronic devices, you
should use the return and collection systems put in place in the country
concerned.
Batteries must not be disposed together with your household waste.
Used batteries must be disposed of in local collection systems.
0010020122-001
2
1

Energy efficiency
11
Commercial Boiler Series – 6720814333 (2019/05)
9 Energy efficiency
9.1 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 (EU) 2017/1369.
Table 7 Product data for energy consumption
Product data Symbol Unit 50 V2 65-V2 85-V2 100-V2
Product type – – GB162-50 V2
G20
GB162-65 V2
G20
GB162-85 V2
G20
GB162-100V2
G20
Condensing boiler – – 
Low temperature boiler – – 
B1 boiler – – 
Cogeneration space heater (CHP) – – 
Combination heater – – 
Rated heat output Prated kW 47 63 80 95
Seasonal space heating energy efficiency s%93 93 - -
Energy efficiency class – – A A - -
Useful heat output
At rated heat output and high temperature regime 1)
1) High-temperature regime is defined as 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
P4kW 46.5 62.6 80.0 94.5
At 30 % of rated heat output and low temperature regime 2)
2) Low temperature for condensing boilers is defined as 30 °C, for low-temperature boilers 37 °C and for other heaters 50 °C return temperature (at heater inlet).
P1kW 15.4 20.8 26.5 31.2
Useful efficiency
At rated heat output and high temperature regime 1) 4% 88.5 88.3 88.7 88.1
At 30 % of rated heat output and low temperature regime 2) 1% 97.6 97.7 98.6 98.7
Auxiliary electricity consumption
At full load elmax kW 0.041 0.082 0.102 0.155
At part load elmin kW 0.018 0.018 0.025 0.025
In standby mode PSB kW 0.006 0.006 0.006 0.006
Other items
Standby heat loss Pstby kW 0.088 0.088 0.088 0.088
Ignition burner power consumption Pign kW 0.000 0.000 0.000 0.000
Emissions of nitrogen oxides NOx mg/kWh 21 32 39 42
Sound power level, indoors LWA dB(A) 54 61 - -

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