11
Greenstar FS/Combi FS – 6720810589 (2021/01)
Prepare for operation
2.3
Overview of boiler types
Table describes the meaning of the model number:
KBR21-3
Heat only appliance
A
23
KBR28-3
Heat only appliance
A
23
KBR35-3
Heat only appliance
A
23
KBR42-3
Heat only appliance
A
23
KWB28-3
Combi appliance
A
23
KWB35-3
Combi appliance
A
23
KWB42-3
Combi appliance
A
23
Table 2
Appliances types
K
Floor standing heating appliance
W
DHW heating
B
Condensing technology
R
Constant temperature control
21..42
Output in kW. 42kW = 143 310BTU/hr
-3
Version
A
Fan-supported appliance
23
Natural gas (NG)
3
Prepare for operation
▶ If existing, open the heating supply valve and the heating return valve.
▶ if existing, open the cold water valve and the DHW valve.
▶ When using KBR..-3A appliance with DHW tank, open a DHW tap until water run
out.
▶ Open the gas cock
▶ Open the control cover.
