Glossary - Wolf BM-2 Operating Instructions For User

23 Glossary

Cascade
Contractor level
Cylinder charging
DHW heating
eBUS
ECO ABS
Economy temperature
Emissions test mode
Flow temperature
Frost protection
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Glossary
A cascade is a parallel connection of several heating appliances in order to
achieve a higher total output.
The setting options in the contractor level are reserved for the heating
contractor. This facility ensures your safety, since incorrect entries can cause
injury, or damage to the heating system.
Cylinder charging refers to the heating of a DHW cylinder that has an
internal indirect coil. To do this, a cylinder charging pump transports the
boiler water and therefore the heating energy to the heat exchanger of the
DHW cylinder.
The term DHW heating refers to the heating up of domestic hot water in a
DHW cylinder. This could be an instantaneous water heater, a DHW cylinder,
a DHW cylinder with internal indirect coil or a similar appliance.
eBUS is a protocol for the networking of components in a heating system
with the aim of facilitating central control of the entire system.
The ECO ABS (eco setback) function causes the heating system to switch
on/off automatically during setback mode if the average outside temperature
exceeds or falls below a specified value, for example if there are high
outside temperatures during the night.
The economy temperature is the value that the set room temperature is
reduced to during periods of low usage.
Emissions test mode is only necessary for the flue gas test. The heating
appliance provides maximum heating output in emissions test mode (full
load operation). Emissions test mode terminates automatically either after
15 minutes or if the maximum flow temperature has been exceeded.
Flow temperature refers to the temperature of the heating water flowing
to the radiator. It lies between 35 °C and 70 °C (depending on the outside
temperature) in heating control units which are regulated by the outside
temperature. In heating systems with pure surface heating, 25 °C to 40 °C is
adequate. In heating systems with no mixer circuit, the flow temperature is
the same as the temperature of the boiler water.
The contractor sets a temperature value on the BM-2 programming unit,
below which the heating appliance goes into the frost protection function.
The boiler circuit pump will start to operate continuously if the outside
temperature falls below the selected value. If the boiler water temperature
falls below 5 °C, the burner starts and heats the boiler up to the minimum
boiler water temperature.
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