Telemark TVP-2000, Руководство по эксплуатации, установке и обслуживанию, Страница: 42 / 81

Page 42 of 42
TVP Manual (full) March 2007 CE rev 03.doc
NOTE
To reduce the cycle time for any given system it is good practice to use the remote sensors
and place them on the refrigeration lines as close as possible to the vacuum feed-through.
The best thermal contact is made if the sensors are placed into copper using a thermally
conductive grease into sleeves which have in turn been silver soldered directly on to the
refrigeration lines.
Diagram 16.
Remote
sensor silver
soldered to
refrigeration
line.
If the system
is to be used
with either the RS232 interface or remote connector, repeat evaluation using your process
controller to drive the process. Carry out at lest three complete cool/defrost/standby cycles
before checking for leaks especially at the couplings to the refrigeration lines.
Re-check the couplings, braze points, etc for any leaks with a halogen leak detector. Leaks if
found must be repaired. After any leaks are repaired, re-pressurise the TVP unit as for initial
installation and perform the temperature cycling again.
CAUTION
Before any leaks are repaired the refrigerant mixture must be drawn back into the TVP unit.
Using an oil free refrigerant reclaim unit. This requires an experienced technician details of
how this may be achieve are outside the scope of this manual.
CAUTION
Do not operate the unit if a refrigerant leak is suspected. Be very careful not to achieve a
vacuum within the refrigeration lines whilst the hand valves are open, as this will lead to
contamination of the system by water.