Model H1301 Recovery and Recycling System
Installation, Operation and Maintenance Manual
Revision-L September, 2019
Page 88 of 105
VII. System Maintenance Procedures
P. Cooling System Controller Setting (continued)
2. Cooling System Temperature Controller Calibration:
During AGENT processing it is normal for the Process Temperature Controller and the
Cooling System Temperature Controller displays to differ by as much as 15 degrees. This
is caused by the flow of AGENT into the machine and the variations of liquid and vapor
levels in the process tank. When inlet recovery stops, the machine will cool the process
tank and condense any vapor phase AGENT into a liquid. When the vapor is condensed,
and the machine has cooled to the set point of the controller, the temperature display of
the process temperature controller and the cooling system temperature controller should
match within +/-3.
If the two controller temperature displays differ by more than 5 after a cooling cycle, just
after the system compressors shut down, then maintenance should be performed. First,
perform the Process Temperature Controller Calibration Section-VII.N.1. of this document.
The cooling system controller may then be calibrated using the process temperature
controller as the reference temperature.
Allow the machine to cool to the set point of the controller and the compressors of the
machine to shut down. The calibration shall be accomplished by adjusting the cooling
system process display to match the Process Temperature Controller Display. When
calibrating the machine must not be processing AGENT and the cooling system
compressors must be off.
a. Calibrate the Process Temperature Controller as detailed by section-VII.N.2.
b. Place the machine main power switch to the ON position.
c. Allow the machine to cool to the set point of the controller and the cooling system
compressors to shut down. Place the Cooling System Controller Power Switch to
the Off position. Then place the Cooling System Controller Power Switch back to
the On position.
d. Press and hold the Function-key then press and hold with the UP arrow key within
30 seconds after power on: the controller will enter the Select Mode. Press the
Down Arrow-key so that the upper display indicates SEtP. Press the Function-key:
the lower line should display ULOC.
e. Use the UP arrow key to enter the number 20 into the upper display line then press
the Function-key. The controller should now enter the setup programming mode.
f. The controller lower line should display FiLE while the upper line should display 2.0.
g. Press the Function-key the upper display line will now indicate the process variable
offset value. The bottom display will indicate OFFS.
h. Use the UP and DOWN arrow keys to enter the difference between the Process
Temperature Controller Display and what the Cooling System Temperature
Controller had displayed. Negative numbers will be entered by pressing the down
arrow key past the 0 display. For example: if the Process Temperature controller
indicated a –70 reading while the Cooling System Controller indicated –65 then –5
should be entered as the offset value.
CAUTION: If offsets greater than +/-8 need to be entered then the thermocouple
connection at the bottom of the process tank and the foam insulation
should be inspected for integrity and adhesion to the bottom of the tank.
i. Place the Cooling System Power Switch to the OFF position. Wait 1-minute then
place the Cooling System Power Switch to the ON position.
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