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Key to figure 8 Heating boiler KBR..-3A:
[T]
Top of control board
[1]
Code plug
[2]
System supply temperature sensor
[3]
Diagnostic interface
[4]
ON/OFF switch
[5]
Fuse T 6.3 A (120 VAC)
[6]
Ignition transformer
[7]
Boiler high limit dial
[8]
High voltage - Installer connection box
[9]
External heating pump
[10]
DHW tank primary pump or 3 way valve
[11]
120 VAC connection
[12]
Empty (future connectivity)
[13]
DHS Sen - Domestic Hot Water temperature sensor (NTC)
[14]
LWCO - Low Water Cut Off
[15]
Out Sen - Outdoor temperature sensor
[16]
BUS - BUS connection to programmer
[17]
Low voltage - Installer connection box
[18]
Ignition electrode
[19]
Boiler block temperature limiter
[20]
Boiler circulator
[21]
Flame rod electrode
[22]
LLH/Supply temperature sensor
[23]
Additional supply temperature limiter
[24]
Fan
[25]
Flue gas temperature limiter
[26]
Gas valve
[27]
DHW Set point Dial
Greenstar FS/Combi FS – 6 720 810 590 (2020/04)
Information about the appliance
15
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