MANEUROP® RECIPROCATING COMPRESSORS Features The Maneurop® NTZ series from A liquid injection system is not re- Danfoss Commercial Compressors quired. All components are of high is a range of hermetic reciprocating quality and precision to assure a long compressors for low evaporating tem- product life.
The code numbers for NTZ compres- tables list the code numbers for NTZ (for ordering) sors are according to the standard compressors in single packs and Danfoss numbering system. Below industrial packs. Code no. NTZ compressors in single pack* Motor voltage code...
ELECTRICAL CONNECTIONS AND WIRING Voltage application range Motor voltage code Nominal voltage Voltage application range 208-230 V / 1 / 60 Hz 187 – 253 V 200-230 V / 3 / 60 Hz 180 – 253 V 380-400 V / 3 / 50 Hz 340 –...
ELECTRICAL CONNECTIONS AND WIRING Nominal capacitor values 50 Hz PSC/CSR* CSR only Start and relays Start capacitors capacitors Models relay (A) μF (C) μF (B) μF NTZ048 3ARR3J4A4 NTZ068 PSC: Permanent Split Capacitor 60 Hz PSC/CSR* CSR only CSR: Capacitor Start Run Start Run capacitors: 440 volts Start...
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ELECTRICAL CONNECTIONS AND WIRING Single phase CSR wiring with trickle circuit Motor protector A & C Run capacitors Start capacitor Common Start winding (auxiliary) Run winding (main) Single phase CSR wiring without trickle circuit Motor protector A + C Run capacitors Start capacitor Common Start winding (auxiliary)
R404A and R507A are es- thermodynamic properties than pecially suitable for low and medium R404A and R507A. Especially their temperature applications. Danfoss larger temperature glide shall not be recommends the use of these refriger- neglected. Using these refrigerants the ants with NTZ compressors.
For guidelines on manifolding ternating power supply. Danfoss does Maneurop® NTZ compressors, please not warrant the compressors for use refer to literature called "Parallel Appli- on mobile applications such as trucks, cation Guidelines".
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For servicing of existing installations refrigerating capacity and the system where acid formation is present the refrigerant charge. Danfoss DCL solid core fi lter driers Suction pressure control An MOP-type expansion valve or suc- When compressors are mounted onto tion pressure regulator (i.e. Danfoss...
SYSTEM DESIGN RECOMMENDATIONS Operating limits High pressure A high-pressure (HP) safety switch is ated with a manual reset device to required to shut down the compressor prevent cycling around the high pres- should the discharge pressure exceed sure limit. the values shown in the table below. If a discharge valve is used, the HP This switch can be set at lower values switch must be connected to the serv-...
SYSTEM DESIGN RECOMMENDATIONS the thermostat, mounting bracket indicated below at no more than and insulation. The thermostat must 150 mm from the discharge connec- be attached to the discharge line as tion. Thermostat Discharge line Bracket Insulation Liquid refrigerant control Refrigeration compressors are basi- Liquid refrigerant will dilute the oil, and charge limits...
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As a general rule, Danfoss Commercial ing operation or after the defrost op- Compressors recommends to size the eration. This device also helps protect...
SOUND AND VIBRATION MANAGEMENT Sound Compressors in operation are one of a refrigeration system. Both phenom- the sources of sound and vibration in ena are closely related. Sound produced by a compressor is pressors are 100% suction gas cooled transmitted in every direction by the and require no external cooling they ambient air, the mounting feet, the can be insulated or enclosed in a sound...
INSTALLATION AND SERVICE System cleanliness System contamination is one of the If fl ux is used, take every precaution main factors that aff ects equipment to prevent the leakage of fl ux into reliability and compressor service life. the piping. The use of fl ux core or Therefore it is important to take care fl ux coated braze wire or rod instead of the system cleanliness when as-...
INSTALLATION AND SERVICE Compressor connection New compressors have a protective sleeves or valves may be brazed to the to the system nitrogen holding charge. Only remove pipes when mounted on the compres- the suction and discharge plugs just sor. In this situation nitrogen or CO before connecting the compressor to must be purged through the compres- the installation, so as to prevent air...
INSTALLATION AND SERVICE Leak detection Whenever possible the compressor oxygen, dry air or acetylene as these must be kept isolated from the sys- gasses can form an infl ammable mix- tem during leak detection by closing ture with the compressor oil. Never the suction and discharge valves Use use CFC or HCFC refrigerants for leak a mixture of nitrogen and the fi nal re-...
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Normally recommended. Always use Danfoss the quantity of oil added should be no 160Z lubricant for systems with NTZ more than 2% of the total refrigerant compressors and R404A or R507A.
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And, we back technical solutions with business solution to help your company reduce costs, streamline processes and achieve your business goals. Danfoss A/S • www.danfoss.com FRCC.PC.002.A2.02 - Replace FRCC.PC.002.A1.02 May 2005 Produced by Danfoss CC- DSS - 02/2007...
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