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
22
FRCC.PC.002.A4.22

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, refrigera-
tion-grade copper tubes and silver alloy brazing
material. Clean all parts before brazing and
always purge nitrogen or CO through the pipes
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 com-
pressor 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 – NTZ136
Mounting grommet bolt, NTZ215 - NTZ271
Belt crankcase heater
during brazing to prevent oxidation. If flux is
used, take every precaution to prevent the leak-
age 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 mois-
ture removal. All installation and service work
shall only be done by qualified personnel re-
specting all procedures and using tools (charging
systems, tubes, vacuum pumps, etc.) dedicated
for R404A and R507.
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 (in.lb)
Min.
710
885
620
710
-
-
355
400
100
3.5
105
355
-
Max.
885
1060
795
885
27
27
400
440
150
7
160
530
35