44
Adjusting the Vacuum
Adjust the positive/negative flow through the mold by using the vacuum adjusting valve on unit
back. Start by full closing the valve so that the injector makes a vacuum in the return line from
process. At the leak, air is drawn into the circuit. The adjusting valve should be opened slowly to
allow water to flow to the mold and pressurize the supply line. The leak will reappear as the
pressure increases. At this point, the adjusting valve must be closed until the leak is eliminated.
Note: Do not run the system with the vacuum adjust valve in the full vacuum position, as this
position allows no flow to the process. Process control could be lost.
Note: If a tool/mold has a leak the to/from process lines should be adjusted so the leak is closest
to the from process connection.
6.6
Operation of Automatic Process (Mold) Purge
Connect compressed air supply (regulated to 5psi) to port labeled air supply. Turn the switch
labeled “Mold purge” to the “on” position. This will activate a circuit that will hold open the drain
solenoid valve while introducing compressed air (air pressure should be regulated to 5 psi or less)
into the process lines to remove fluid from a process.
Note: Water supply must be turned off to the system prior to activating the mold purge switch.
