AGL_HP_VS_YHV2P_E_Rev0 13
3.1.4 Compressor mounting parts
The compressors are designed to be mounted on vibration absorber grommets (part of the standard
delivery). The grommets 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
suit a M8 screw. The mounting torque should be 13 ± 1 Nm. It is critically important that the grommet
is not compressed.
Mounting parts YHV*2P – Soft mountings
Figure 13: Rubber mounting part with sleeve
3.2 Compressor brazing procedure
WARNING
Air/flammable refrigerant mixture! Creation of a potentially flammable
atmosphere! Fire hazard! Remove all refrigerant before opening the system.
When working on a refrigerant-filled system, make sure to follow the safety
and working instructions given in the Chapter 6 "Maintenance & repair".
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 make contact.
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.
Copeland Scroll compressors have copper-plated steel suction
and discharge. These 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 may have to
be changed from those commonly used.
Refer to Figure 14 and procedure below for the brazing of the
suction, discharge and injection lines to a Scroll compressor.
▪ For systems with A2L refrigerants, it is mandatory to flush oxygen-free nitrogen through the
piping during the brazing process.
▪ The copper-coated steel tubes on scroll compressors can be brazed in approximately the same
manner as any copper tube.
▪ Recommended brazing materials: any silfos material is recommended, preferably with a
minimum of 5% silver. However, 0% silver is acceptable.
▪ Be sure tube fitting inner diameter and tube outer diameter are clean prior to assembly.
▪ Using a double-tipped torch, apply heat in area 1.
▪ As the tube approaches brazing temperature, move the torch flame to area 2.
Figure 14: : Brazing areas
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