Filter Maintenance - MasterCool 69500 Operating Instructions Manual

proper vacuum condition is reached.
5. Check scale for proper amount of refrigerant added. If proper amount of refrigerant has been transferred continue to
number 6. If more refrigerant is required open "valve 7" and low side valve on A/C system. Close "manifold inlet valve
16". Recovery machine will start and charge more refrigerant to A/C system. Repeat number 4.
6. After proper amount of refrigerant is transferred and recovery machine shuts off, change settings to purge mode.
Recovery machine will transfer most refrigerant in recovery/recycle unit to dot tank. When recovery machine shuts off
close "outlet valve". Close high side and low side valve (if open on A/C system.) Charge is complete.
DRAINING OIL SEPARATOR
When recovering and recycling refrigerant, most oil that is removed from the
A/C system will be retained in the oil separator. The oil should be drained out of
separator after each use to prevent the mixing of different oils during recovery.
1. After recovery/recycle operation, when a low residual pressure (5-10 PSI, .3-.7
bar) exists in the recovery/recycle unit, close "valves 10 and 11". Put a small
container under "valve 9".
2. With the oil separator standing vertically, very slowly open "valve 9". Oil
collected by the oil separator will drain into container. Close "valve 9". Dispose
of oil in an approved manner.

FILTER MAINTENANCE

Filter should be changed on a regular basis. The frequency will depend on the
condition of the refrigerants being recovered/recycled. One way to test for a dirty
filter is to compare the pressure readings on low side gauge of manifold with
low side gauge on recovery machine. With recovery/recycle system circulating
refrigerant gauge readings should be within 10 psi (.7 bar) of each other. A
pressure difference higher than this indicates a dirty filter.
MOISTURE INDICATING SIGHT GLASS
The moisture indicating sight glass changes color depending on the amount of
moisture present in recycle system. As mentioned previously, recycle system
should be kept sealed to prevent moisture from outside of system contaminating
indicating sight glass. Replacement of sight glass is required when recycle system
is evacuated to a high vacuum and sight glass does not indicate a "dry" condition.
WARNING: This product can expose you to chemicals including lead and Di (2-ethylhexyl) phthalate, which are known
to the State of California to cause cancer and birth defects or other reproductive harm.
4
For more information go to www.P65Warnings.ca.gov
www.mastercool.com
5
LOW
VA
V9