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TVP Manual (full) March 2007 CE rev 03.doc
Section 1 System operation
At any time a TVP system and in any control mode maybe safely turned off by depressing the
stop / emergency off (EMO) button. (Figure 1)
The following section assumes the system has been installed correctly and covers the following
modes of operation.
Warning:
Vacuum systems present many hazards, take time to read this manual and familiarise yourself
with your installation
1.1 “Local” (manual) mode using the front control panel
A TVP water vapor cryotrap is fully protected by a sophisticated computer control system,
which allows very simple manual operation.
The on board computer protects the system from misuse therefore it will not permit operation
when system parameters are outside acceptable values. Likewise you may need to wait a
short time before engaging a different mode. At any time while the system has power it is
possible to use the scroll button, which remains illuminated at all times.
Diagram 2 The display panel
Display character
mnemonic
Meaning Units
DP Discharge pressure Psi
SP Suction pressure Psi
CT Coldest system temperature (internal measurement)
O
C
CI Coil in (outlet / flow from unit) temperature
O
C
CO Coil out (inlet / return to unit) temperature
O
C
CI2 Second coil value – only dual coil units
O
C
E(n) System error where n = an integer
Caution
It is good practice to note the balance pressure SP or DP and the coldest temperature CT
before starting the system after any extended period of shut down as this can pin point a leak
on the refrigeration lines or cryo-coil.
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