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3.1
Proper use
The appliance may only be installed in closed loop hot water central
heating systems.
Any other purpose is considered improper use. Any resulting damage is
excluded from the manufacturer's warranty.
The commercial and industrial use of the appliance for generating
process heat is not permitted.
3.2
Overview of boiler types
Table describes the meaning of the model number:
KBR16-3
Heat only appliance A
KBR21-3
Heat only appliance A
KBR28-3
Heat only appliance A
KBR35-3
Heat only appliance A
KBR42-3
Heat only appliance A
KWB28-3
Combi appliance
KWB35-3
Combi appliance
KWB42-3
Combi appliance
Table 2 Appliances types
K
Floor standing heating appliance
W
DHW heating
B
Condensing technology
R
Constant temperature control
16..42 Output in kW. 42kW = 143 310BTU/hr
-3
Version
A
Fan-supported appliance
23
Natural gas (NG)
3.3
Rating plate
The rating plate is located on the right-hand side of the appliance.
Fig. 3
Position of rating plate
The rating plate contains the appliance output, model number, approval
data, and serial number.
Greenstar FS/Combi FS – 6 720 810 590 (2020/04)
23
23
23
23
23
A
23
A
23
A
23
3.4
Appliance description
• Appliance is a floor mounted installation
• Intelligent boiler pump control
• Heatronic boiler control
• Three-speed boiler circulator
• Automatic air vent (combi boiler only)
• Display
• Automatic ignition
• Continuously-controlled output
• Full protection via the Heatronic with flame rod and solenoid valves
• No minimum circulating water flow rate required
• Suitable for all hydronic emitters
• Flue adapter for flue gas and combustion air with test ports
• Variable speed fan
• Gas premix burner
• Heat exchanger temperature and high limit sensor
• LLH / Supply temperature sensor
• Temperature limiter
• Safety relief valve, pressure gauge
• Expansion vessel (combi boiler only)
• Connection possibility for DHW tank temperature sensor (NTC)
(heating boiler only)
• Flue gas temperature limiter
• Connection for DHW...
• DHW (combi boiler only)
• Internal motorized 3-way valve (combi boiler only)
• Integrated low loss header with option to isolate flow
3.5
Accessories
Here you will find a list of typical accessories for this appliance. Refer to
the Bosch Product Catalog for a complete overview of all available
accessories.
• Weather compensation control FW200
• CRC100 or CRC200 user interfaces
• CZM100 Zoning module
• Optional concentric vent kit available for horizontal direct vent
terminations
• Modules for system expansions:
– ICM for cascading up to 4 boilers
Information about the appliance
7
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