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Cascade System Guide
Boilers for Cascade System
Control options for cascade system when using LLDM.
Vitocontrol-S WB2B cascade control.
For systems up to 4 boilers of the same size, using KMK
bus communication between the Vitotronic HC1 boiler
control and the Vitocontrol-S WB2B cascade control.
System type
With manifold
WB2B 80
WB2B918
WB2B 105
WB2B919
BMS or third party cascading controller
For systems up to 4 boilers of the same size, using
0-10VDC temperature signal between the Vitotronic 200
HO1 and the third party controller.
System type
With manifold
WB2B 80
WB2B914
WB2B 105
WB2B915
The packages listed above include the following
components;
- WB2B Boiler
- Vitotronic boiler control
- Power pump module
- 30 psig relief valve
- Pressure gauge
- Gas shut-off valve
- (2) fill/drain valves
- Mounting hardware
Optional components:
- 45 psig relief valve (PN 9549944)
- 60 psig relief valve (PN 9560183)
Pumps per Boiler with the Manifold System
One circulation pump per boiler is required:
- UPS 26-99 FC 7248585 for a max of 24 gpm
- UPS 26-150 F 7441596 for a max of 28 gpm
Boiler model 200-W, WB2B
t for NG/LPG
Output Btu/h
25º F rise (GPM)
30º F rise (GPM)
35º F rise (GPM)
40º F rise (GPM)
80
105
260 000
350 000
20.8
28.0
17.3
23.3
14.9
20.0
13.0
17.5
7
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