Danfoss Turbocor TTS Series Applications And Installation Manual page 13

Acronym/Term
CE
CEC
Choke
CIM
Compression Ratio
CPR
CSA
dB
dBA
DC Bus
DC-DC Converter
Diffuser
EMC
overheat protection to motor windings.
Conformance European. The CE marking (also known as CE mark) is a mandatory
conformity mark on many products placed on the single market in the European (EU)
Economic Area. The CE marking certifies that a product has met EU health, safety, and
environmental requirements, which ensure consumer safety.
Canadian Electrical Code.
Definitive point on compressor map where mass flow rate is at maximum for compressor
speed and lift conditions.
Compressor Interface Module; the part of the compressor electronics where the user
connects all field connection wiring such as RS-485, EXV and analog / digital wiring. Also
known as the Input/Output (IO) board.
The absolute discharge pressure divided by the absolute suction pressure.
Compressor Performance Rating.
Canadian Standards Association (www.csa.ca).
Logarithmic scale that measures sound and loudness.
Sound level measurement that has been adjusted based on how the human ear perceives
sounds in the air.
High DC voltage simultaneously connected to multiple compressor components via
metallic bus bars, including the capacitors.
DC-DC converters supply and electrically isolate the high and low DC voltages that are
required by the control circuits. When the compressor is switched on, the High-Voltage
(HV) DC-DC Converter receives its 15VAC supply from the Soft-Start Board. Once the DC
DC-DC Converter bus voltage has risen to a pre-determined level, the HV DC-DC
Converter's onboard circuits are powered by the DC bus (460-900VDC). The HV DC-DC
Converter delivers +24VDC (with respect to 0V) to the Backplane, and HV+ (+250VDC
with respect to HV-) to the magnetic Bearing Pulse Width Modulation (PWM) Amplifier via
the Backplane.
Part of a centrifugal compressor in the fluid module that transforms the high-velocity,
low- pressure gas exiting the impeller into higher-pressure, low-velocity gas discharged
into the condenser.
Electromagnetic Compatibility.
Definition
M-AP-001-EN Rev. S-9/8/2021 Page 13 of 136