GEA Bock HGZ7 - Manual (Page 15)

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5.3 Installation of the liquid subcooler system (standard version)
Separately enclosed components:
Liquid subcooler
Reinjection valve
Solenoid valve
Filter drier
2 sight glasses
Screw-in sleeve, solder adapter and seals
Please check for completeness of parts before beginning installation.
Assembly:
Pipe connections:
For connections, see dimension diagram Chapter 10.
System design, piping and necessary support points for the individual components must be
carefully planned and carried out.
Properly insulate liquid subcooler against condensation and heating and the related loss of
performance.
For rigidity reasons, the use of stainless steel pipes with a wall of 1 mm is preferred. The pipes
must be free of tension during and after soldering to prevent possible breaks lateron.
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5| Compressor assembly
Fig. 19
INFO Observe manufacturer‘s instructions!
INFO The points listed here represent general guidelines and information
on how to pipe and connect the subcooler unit. To perform this work
technical knowledge and skill as well as proof of a hard-soldering
test certificate in accordance with DIN EN 13133 is required.
INFO Use only suitable hard solder and flux. Solder under an inert gas
atmosphere when copper components are to be soldered! The
accompanying expansion valve is designed and adjusted for the
compressor and the listed refrigerant (sensor charge, nozzle).
Only use expansion valves approved and supplied by GEA Bock!
INFO The intermediate pressure line and intermediate pressure chamber
are fully insulated at the factory. To mount the expansion valve,
cut the insulation as shown in the marked area in Fig. 20, page 16.
Correct sensor placement is marked by an unpainted area on the
pipe.
ATTENTION To avoid vibration cracks in the subcooler system, the individual
components must be mounted directly to the compressor or
installed as a decoupled unit!