CONDENSER / SUB-COOLER OPERATION
Using refrigerant hoses equipped with ball valves on one end (CPS P/N HP5YE), proceed to connect the non-ball valve end
of the hoses to the inlet and outlet ports of the MT69. Evacuate the MT69 with hoses attached to remove contaminants and
expedite the recovery process. Install the MT69 between the outlet port of the recovery unit and the vapor valve of the recovery
cylinder. Submerse the MT69 into a container with cool water (the cooler the water, the more heat it can absorb during the
recovery process). Connect the system to be serviced to the inlet of the recovery unit as shown. Ensure that the recovery
cylinder is placed on a scale for continuous weight monitoring. Open all hose, tank and recovery unit valves in the flow path.
Start and run the refrigerant recovery unit per the manufacturer’s directions. As the temperature & pressure of the recovery
tank increases, the water surrounding the MT69 will become warmer as it absorbs heat from the compressed refrigerant. It
may become necessary to replace the warmed water with cooler water in extreme ambient conditions to keep the tank tem-
perature & pressure safely below high pressure limits. Once the refrigerant has been completely recovered from the system,
turn the recovery unit off and close all hose, tank and recovery unit valves. Recovery is now complete. WARNING: The MT69
will contain high pressure refrigerant upon completion of the recovery process. Proceed to recover the residual refrigerant
from the MT69 per the instructions below.
The MT69 will contain high pressure refrigerant upon completion of a recovery job. DO NOT USE the MT69 as a storage ves-
sel. The residual refrigerant must be properly recovered per the following instructions. Ensure that all valves on the tank,
hoses and recovery unit are closed. Connect the MT69 to a manifold and recovery unit as shown in Figure 2. Keeping the
low side manifold valve CLOSED, proceed to open all other hose, tank and recovery unit valves in the flow path. Start the
Refrigerant Recovery unit per the manufacturer’s instructions. Manually regulate the low side manifold valve so that the low
side gauge reads 50 PSIG. This will slowly fall into a vacuum, indicating that the MT69 has been fully evacuated of refriger-
ant. Visually check the pressure gauge on the MT69 to verify that it reads zero BEFORE proceeding to disconnect the hoses.
Recovery is now complete. Dry off the external surface of the MT69 and replace caps to prevent contamination during storage.
CLEARING OUT THE MT69 AFTER A RECOVERY OPERATION
FIGURE 1.
FIGURE 2.
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73-078 Rev B
