Cascade Operation - Technical Data / Control / Installation Information - Wolf COB Technical Manual And Installation Instructions

Specification
Cascade type
Rated heating output at 80/60 °C
Rated heating output at 50/30 °C
Rated heat input
Lowest output at 80/60 °C stage 1
Lowest heating output at 50/30 °C stage 1
Lowest output
General
Setting the eBus address in
cascade mode
(see also installation instructions
for KM module)
3062547_201802
24 Cascade operation - technical data /
control / installation information
2 x
COB-29
kW 56,4
kW 59,2
kW 58,0
kW
kW
kW
These oil condensing boilers have control PCBs with functions that are optimally
matched to the digital controller type KM for cascade control. Up to four COB-29 or
COB-40 oil condensing boilers (with the same output) with an output range of 18.5 kW
to 112.8 kW (cascade COB-29) or 25.3 kW to 152.0 kW (cascade COB-40) can be
linked together to form a single cascade. Subject to load, this digital cascade controller
KM can control the header flow, a mixer circuit and a DHW cylinder circuit. The digital
controller type MM from the WOLF range of control accessories can be connected to
regulate an additional mixer circuit and radiator circuit. Furthermore, a BM can be used
in each case as a remote control.
For a detailed description, see also the installation instructions for the individual
modules.
The eBUS address is set by pressing the reset button for at least 5 seconds after
the appliance has been switched on. After 5 seconds, the corresponding flashing
code appears (in accordance with the table) at the illuminated signal ring. Select the
corresponding eBUS address with the DHW temperature rotary selector. Your selection
of the required eBUS address is saved by releasing the reset button. No address can
be allocated more than once.
Boiler in cascade
eBus address
mode
Boiler 1
Boiler 2
Boiler 3
Boiler 4
*Factory setting (individual boiler without cascade mode)
3 x 4 x
COB-29 COB-29
84,6 112,8
88,8 118,4
87,0 116,0
18.5
19.6
19,0
Position
Rotary selector,
DHW temperature
selection
1* 1*
2 2
3 3
4 4
2 x 3 x 4 x
COB-40 COB-40 COB-40
76,0 114,0 152,0
80.0 120,0 160,0
77,6 116,4 155,2
25,3
26.8
26.0
Illuminated ring
display
flashing red
flashing yellow
flashing yellow/red
flashing yellow/
green
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