Mounting Parts; Brazing Procedure; General Brazing Procedure - Emerson Copeland Scroll ZR24KRE Application Manuallines

Compressors for comfort, precision and process cooling
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Mounting parts

3.2
A kit of vibration absorber grommets can be ordered with each compressor. They dampen the start-
up surge of the compressor and minimise sound and vibration transmission to the compressor base
during operation. The metal sleeve inside is a guide designed to hold the grommet in place. It is not
designed as a load-bearing member, and application of excessive torque to the bolts can crush the
sleeve. Its inner diameter is approximately 8.5 mm to fit, eg, an M8 screw. The mounting torque
should be 13 ± 1 Nm. It is critically important for the grommet not to be compressed.
If the compressors are mounted in tandem or used in parallel, then the hard mountings (bolt M9
5/16") are recommended. The mounting torque should be 27 ± 1 Nm.
See Emerson spare parts software for references.
Mounting parts: ZR24KRE to ZR190KRE - Soft mountings
Alternative mounting parts for ZR24KRE to ZR190KRE – Hard mountings
Figure 6: Mounting parts

Brazing procedure

3.3
WARNING
High temperature! Burning! Proceed with caution when brazing system
components. Do not touch the compressor until it has cooled down. Ensure
that other materials in the area of the compressor do not come into contact
with it.
IMPORTANT
Blockage! Compressor breakdown! Maintain a flow of oxygen-free nitrogen
through the system at very low pressure during brazing. Nitrogen displaces
the air and prevents the formation of copper oxides in the system. If allowed
to form, the copper oxide material can later be swept through the system and
block screens such as those protecting capillary tubes, thermal expansion
valves, and accumulator oil return holes.
Contamination or moisture! Bearing failure! Do not remove the plugs until
the compressor is set into the unit. This minimises any entry of contaminants
and moisture.

3.3.1 General brazing procedure

Figure 7: Brazing areas
▪ The copper-coated steel tubes on scroll compressors can be brazed in approximately the same
manner as any copper tube.
8
Copeland Scroll compressors have copper-plated steel
suction and discharge stub tubes. These stub tubes are
far more robust and less prone to leaks than copper
tubes. Due to the different thermal properties of steel and
copper, brazing procedures should be carried out in an
appropriate manner.
Refer to Figure 7 and the procedure below for the
brazing of the stub tube connections of a scroll
compressor.
AGL_AC_ST_ZRKRE_E_Rev01

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