Model H1301 Recovery and Recycling System
Installation, Operation and Maintenance Manual
Revision-L September, 2019
Page 91 of 105
VII. System Maintenance Procedures (continued)
Q. Inlet Vacuum Switch Calibration
The inlet vacuum switch P2 sets the pressure or vacuum level for the final evacuation of
the source container.
The Factory Setting of the Inlet Vacuum Switch is –10” Hg vacuum.
The vapor compressor will evacuate the source container until the set point of the Inlet
Vacuum Switch is attained. When the set point is attained, the Inlet Vacuum Switch
deactivates input #A6 on the PLC. This signals the PLC that the source container is empty
and all inlet recovery operations will end. The following will detail the Inlet Vacuum Switch
calibration. Refer to figure-23 for the location and depiction of the switch.
Calibration Procedure
Required Materials:
Clean Dry Nitrogen Source regulated to 200 psi
Vacuum Gauge
¼” Refrigeration Service Hoses
Straight Blade Screwdriver
1. Open the filter maintenance door of the control panel hood to gain access to the Inlet
Pressure Switch adjustment screws.
WARNING! THE AREA INSIDE THE CONTROL PANEL HOOD CONTAINS
120VAC POWER CONNECTIONS; DO NOT REST ANY PART OF
YOUR BODY ON ANY OF THE INTERNAL COMPONENTS.
2. Connect a source of clean dry nitrogen gas regulated to 10 psi, and the vacuum gauge
to the front panel Inlet Valve of the machine as depicted by figure-22 below.
3. Open the nitrogen source to the machine.
4. Loosen the nitrogen connection at the Inlet Valve to purge air out of the connecting
plumbing. Then retighten the connection.
5. Open the manual Inlet Valve of the machine.
6. Place the System Power Switch to the ON position.
7. Shut off the nitrogen supply using the installed shut-off valve so that the vacuum gauge
is still open to the inlet of the machine.
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