Installation And Service; System Cleanliness; Compressor Handling, Mounting And Connection - Danfoss Maneurop NTZ Series Application Manuallines

Application Guidelines

System cleanliness

Compressor handling,
mounting and connection
Compressor handling
Compressor mounting

Installation and service

System contamination is one of the main
factors that affects equipment reliability and
compressor service life. Therefore it is important
to take care of the system cleanliness when
assembling a refrigeration system. During the
manufacturing process, circuit contamination
can be caused by:
• Brazing and welding oxides,
• Filings and particles from removing burrs from
pipe-work,
• Brazing flux,
• Moisture and air.
Only use clean and dehydrated, refrigeration-
grade copper tubes and silver alloy brazing
material. Clean all parts before brazing and
always purge nitrogen or CO
2
Maneurop® NTZ compressors must be handled
with care and all handling procedures must
be performed smoothly and gently. Each NTZ
has been fitted with one lift ring which shall
always be used to lift the compressor. Once the
compressor is installed, the lift ring shall never be
used to lift the complete installation.
The compressor must be mounted onto a
horizontal surface with a maximum slope of
3 degrees. Always use the rubber mounting
Component
Rotolock suction valve, NTZ048 - NTZ068
Rotolock suction valve, NTZ096 - NTZ271
Rotolock discharge valve, NTZ048 – NTZ068
Rotolock discharge valve, NTZ096 - NTZ271
Electrical T-block screws HN°10-32 UNF x 9.5
Earth screw
Oil sight glass (with black chloroprene gasket)
3/8" flare oil equalisation nut
Schrader nut
Schrader valve (internal)
Mounting grommet bolt, NTZ048 – NTZ271
Belt crankcase heater
pipes during brazing to prevent oxidation. If
flux is used, take every precaution to prevent
the leakage of flux into the piping. The use
of flux core or flux coated braze wire or rod
instead of brush applied paste flux is strongly
recommended. Do not drill holes (e.g. for
schrader valves) in parts of the installation
that are already completed, when filings and
burrs cannot be removed. Carefully follow the
instructions below regarding brazing, mounting,
leak detection, pressure test and moisture
removal. All installation and service work shall
only be done by qualified personnel respecting
all procedures and using tools (charging systems,
tubes, vacuum pumps, etc.) dedicated for R404A/
R452A and R507.
through the
Always use the proper tools for transporting the
compressor. Keep the compressor in an upright
position during all handling tasks (manipulating,
transport, storage). The angle off the vertical
must not exceed 15 degrees.
grommets that are shipped with the compressor.
Mounting torques are listed in the below table.
Torque (Nm)
Min. Max.
80 100
100 120
70 90
80 100
- 3
- 3
40 50
45 50
11.3 17
0.4 0.8
12 18
- 4
FRCC.PC.046.A4.02
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