Model H1301 Recovery and Recycling System
Installation, Operation and Maintenance Manual
Revision-L September, 2019
Page 61 of 105
VII. System Maintenance Procedures
K. Complete Machine Evacuation (continued)
6. Process Tank Liquid Purge.
a. Place the N2 Supply Switch to the ON position to pressurize the process tank with nitrogen.
Wait for the pressure display of the Pressure Controller to stabilize to a pressure above 50
psi.
b. Place the Outlet Valve Switch to the ON position.
c. Place the Pump Switch to the ON position: AGENT should now be entering the receiving
container.
After the Low Level indicator goes out there is 25 to 30 pounds of AGENT remaining in the
machine. Listen to the sound of the pump and observe the weigh scale: when the weight of the
receiving container stops increasing and the sound of the pump changes abruptly: the liquid
AGENT has all been expelled from the machine. IMMEDIATELY PERFORM STEP-d. DO NOT
ALLOW THE PUMPS TO OPERATE WITHOUT LIQUID IN THE MACHINE. DAMAGE TO THE
LIQUID PUMPS WILL RESULT.
d. Place the following Control Panel Switches to the AUTO positions IN THE SEQUENCE
AS LISTED.
Pump Switch
Outlet Valve Switch
N2 Supply Switch
e. Place the N2 Valve Switch to the ON position. Vent the process tank until the pressure
stops decreasing as indicated on the Front Panel Pressure Controller. Then place the N2
Valve Switch to the AUTO position.
f. Place the Cooling System Temperature Controller Power Switch to the OFF position.
g. Observe the condition of the plumbing connecting the receiving container to the Outlet Port
of the machine. Wait for any frost that may have formed on the plumbing to dissipate. If no
frost is observed: wait for at least 15-minutes before continuing.
h. Close the shut off valve of the receiving container and disconnect the receiving container
from the Outlet Port of the machine.
i. Install the valve cap to the Nitrogen Vent Port.
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