6.7
Chiller Option (if fitted)
6.7.1
Water Connections
If the furnace has been ordered with an optional chiller, then the cooling water supply
and drain lines must be connected between the free-standing chiller and the furnace
cabinet. Water connections are supplied connected to the retort and ready to operate
(see section 7.4).
The chiller is capable of circulating 5 litres of chilled water per minute.
6.7.2
Electrical Connections
The unit requires a separate dedicated power supply.
Note:
A 9-pin alarm cable must be connected between the chiller and the furnace at
all times, otherwise a "cooling fault" alarm will be triggered.
For more details on the chiller unit, please refer to the manufacturer's manual provided
in the supplementary product document pack.
6.8
Automatic Vacuum Option (if fitted)
The purpose of the (cold) vacuum system is to reach low oxygen levels within the
furnace retort as quickly as possible. This is achieved by pulling a rough vacuum in the
retort, then backfilling (purging) it with inert gas or nitrogen to displace the remaining
oxygen. This process can be repeated as required before turning off the vacuum system
and swapping to a process gas flow at ambient pressure.
For more information on gas flows, please refer to the section 6.5.
Applying a vacuum also has the added benefit of removing trapped gas from porous
work pieces, although this is not the primary purpose of the system.
Note:
The vacuum system should only be operated when the furnace is
at room temperature (cold). Operating the vacuum system during
heating will cause damage to the furnace retort.
Note:
For assembly and connection details, please refer to the separate vacuum
pump manual in the supplementary product documentation pack.
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