Siemens RVS41.813 - Page 140

E
Q
Energy employed to operate the source.
(for air heat pumps, the fan is possible already included via the energy
metering for the compressor).
E
K
Energy employed to operate the compressor (electric or gas), eventually
including emergency heating elements.
E
ein
Employed energy (E
Q
+ E
K
)
E
ab
Delivered energy (heat for heating and DHW heating)
E
um
Energy from the environment (geothermal heat, ground water, air)
E
v
Technical loses
Q8 Brine-to-water pump
K19 Fan (air heat pumps)
K25 Emergency heating element/El imm heater 1 flow
K26 Emergency heating element/El imm heater 2 flow
B21 Flow sensor
B71 Return sensor
Q Volume flow by condenser
The following functions are available in the basic unit to recorded the energy flows
displayed above:
E
Q
Calculates electrical energy to operate the source pump or fan via adjustable
performance parameter [kW] and actual runtime.
E
K
Using external electricity meters:
Metering of electrical energy [kWh] for compressor and heating elements via a
pulse input.
or
Using an external natural gas meter:
Metering of the flowing natural gas volume [m3] via pulse input, calculates
natural gas energy for the compressor via adjustable, average natural gas
energy content [kWh/m3].
E
ein
Using external electricity meters:
Metering of electrical energy [kWh] for compressor, source and heating
elements via a pulse input.
or
Addition of calculated energies for source operation and the metered
compressor energy (E
Q
+ E
K
)
E
ab
Using an external heat meter:
Metering of the heat energy [kWh] via pulse input
or
using an external volumeter:
Metering of condenser flow volume [l] via pulse input, measurement of
temperature difference on heat pump flow (B21) and return (B71) and
calculation of heat volume
or
calculate condenser flow volume via adjustable pump flow [l/h] and the actual
runtime/rpms, measurement of temperature difference on the heat pump flow
(B21) and return (B71) and calculation of heat volume.
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Siemens Switzerland Ltd User manual RVS61.843, RVS41.813 CE1U2355en_02
HVAC Products 6 The settings in detail 28. September 2009