Nidec EMBRACO SLIDING UNIT Serie Montageanleitung Seite 4

The Unit must be mounted in the best refrigeration practice level.
Ensure that the Unit is kept away from the heat sources, damp area, corrosive atmosphere or any place with risk of
explosion.
Do not exceed the recommended service pressure.
3.4 Noise levels
Precautions must be taken during installation to not generate additional noise and vibration:
• Unit must be securely mounted on a stable, rigid base.
• Connecting pipe work must be sufficiently flexible to ensure vibration is not transmitted to the rest of the
installation.
• We recommend insulated material be inserted between the Unit feet and the base or between the wall mounting
brackets and the wall. This can be either isolating pad or anti vibration mounts (not supplied) conforming to the
manufacturer's recommendations for their selection and installation.
• The selection of anti-vibration products and their potential for absorbing vibration is not the responsibility of
Embraco.
• Final noise level of the installation depends on the reflection / absorption properties of the environment. Keep in
mind general rule that installation of the Unit in the corner of surfaces will increase sound pressure level (depending
on the number of reflections).
3.5 Mounting
Ensure the Unit is securely fixed to the floor or wall surface upon which it is mounted using the appropriate fixing
(not supplied).
Warning
: Do not fix the Units to a wall by the rear of the casing as it is not design for this purpose.
It is possible to stack the Unit on top of each other. Maximum stacking is 2, we recommend securing to the wall.
3.6 Access to connections
See picture 4.
If Sliding Unit is supplied with disassembled suction and discharge valves (valves are packed in plastic bag inside the
unit) - assemble it at the beginning of the installation. New sealing to be used.
3.7 Refrigeration connections
To ensure the quality of our products, the Unit has been vacuumed and charged with nitrogen gas.
Warning: To maintain the quality of the Unit and to ensure correct operation, the following precautions must be
taken:
• Check that the pipe work to be connected is clean and dry.
• Protect the casing whilst brazing pipe work.
• Purge the system with nitrogen whilst brazing and ensure the flame is held away from electrical equipment.
• Insulate the suction pipe up to the external valve to limit the superheat.
• Only use designated refrigerant for which the Unit is approved (see identification label)
• Do not add any additives or colorings.
• Ensure the pipe work is well supported and as short as possible and should not exceed 15 meters to prevent oil
trapping and to improve the absorption of vibrations and pulsations.
• In installations with vertical risers, it is necessary to create a U-trap and P-trap and check the velocity inside the
pipe to ensure a proper oil circulation.
• Cut and shape piping carefully to prevent dust and metallic particles getting into the system. Never use a saw. Use
the correct sized bending tool for the pipe diameter to prevent the pipe being compressed.
• Tape the pipes together with self-adhesive vinyl and attach them to the wall with clips.
3.8 Electrical connections
The Unit is fitted with a compressor, fan assembly, pressure switch, crankcase heater, main switch, contactor
connected in electrical boxes (see wiring diagrams).
Ensure the electrical supply is disconnected before carrying out any wiring or repair of the Unit. All
cabling on site must conform with EN60204.
Warning: To ensure the quality of Unit it is essential to:
• Check that the installation power supply voltage is compatible with the voltage supply of the Unit (refer to
identification label).
• Check the compatibility of the wiring diagram with the installation (refer to wiring diagrams)
• Size the cables (power and control) according to the specifications of the Unit installed
• Ensure the power supply to the Unit is correctly protected and earthed
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