Function Description/System Design - Wolf CGB-75 Installation And Technical Manual

Control units
Control units for appliances with a low loss header with KM/MM
Programming module
DHW cylinder
Heating circuit / mixer circuit KM
Heating circuit /
mixer circuit MM
Additional mixer / heating
circuits
Convector heater
Solar
SM1 solar module
SM2 solar module
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Function description /
system design
Generally, at least one programming module (BM) is required. This enables both
individual heating circuits and up to 8 heating circuits (1 direct and 7 mixer circuits) to
be operated and adjusted.
Cylinder heating is controlled by the KM or MM. The cylinder sensor is connected to
E1 of the KM/MM and the cylinder primary pump to A1 of the KM/MM, see installation
instructions for KM/MM.
The cascade module (KM) comprises a cascade control for switching and modulating
boilers, including a header sensor, which acts as a common flow sensor. The (KM)
module also comprises a mixer circuit control and the control for a programmable output.
Parameter settings are made via the programming module BM with address 0.
The following configurations (system schemes) are available in the KM:
Configuration 1 Mixer circuit and cylinder heating with primary pump
Configuration 2 Mixer circuit and convector heater circuit
Configuration 3 Mixer circuit and heating circuit
Configuration 8 Mixer circuit (factory setting)
Configurations 4-7, 9-13 See KM installation instructions
The mixer module (MM) comprises a mixer circuit control and the control for a programmable
output. Parameter settings are made via a central programming module BM.
The following configurations (system schemes) are available in the MM:
Configuration 1 Mixer circuit and cylinder heating with primary pump
Configuration 2 Mixer circuit and convector heater circuit
Configuration 3 Mixer circuit and heating circuit
Configurations 4-7 Return temperature raising facility (not required for condensing
boilers)
Configuration 8 Mixer circuit (factory setting)
Configurations 9-11 See MM installation instructions
A maximum of six mixer modules and one cascade module can be combined per system,
i.e. max. seven mixer circuits. The direct heating circuit should only be allocated once
in the system. A maximum of eight heating circuits are therefore possible.
With a mixer module or cascade module in configuration 2 or 11, a zero volt switching
input can be used for heat demand for convector heaters. The DigiPro, which
communicates with the MM via eBUS, can also be used. Up to 32 subscribers in up to
8 zones can be controlled.
The SM1 solar module controls a single circuit system (1 collector array and 1 cylinder).
The SM1 solar module must be connected to the eBUS for operation via a central BM.
Only one solar module should be connected to the eBUS. Without the eBUS, a BM-
Solar can be used.
The SM2 solar module can control up to two solar circuits (2 collector arrays and
2 cylinders). The SM2 solar module must be connected to the eBUS for operation via
a central BM. Only one solar module should be connected to the eBUS. Without the
eBUS, a BM-Solar can be used.
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