Mastercool 69788-A R134a RECOVERY_RECYCLE_RECHARGE - Manual (Page 7)

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the Manufacturer are such that during work, the average noise level of the machine is less than 70 dB (A).
NOTE: The machine is intended for indoor use only.
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PRINCIPLES OF OPERATION
In a single series of operations, the machine permits recovering and recycling refrigerant with no risk of release into the environment, and also
permits purging the A/C system of humidity and deposits contained in the oil. The machine is equipped with a built-in evaporator/separator that
removes oil and other impurities from the refrigerant recovered from the A/C system and collects them in a container for that purpose. The fluid is
then filtered, recycled and returned to the tank installed in the machine. The machine also permits running certain operational and leak tests on the
A/C system.
SETUP
The machine is supplied fully assembled and tested. Referring to Figure 3, mount the hose with
the BLUE quick-connect coupling on the male threaded connector indicated by the BLUE LOW
PRESSURE symbol and the hose with the RED quick-connect coupling on the male threaded
connector indicated by the RED HIGH PRESSURE symbol.
Referring to Figure 4, remove the protection under the refrigerant scale as follows (UNLOCK
SCALE):
- Loosen the nut (Fig 4-2.)
- Loosen the screw (Fig. 4-1) two to four turns (do not remove from machine.)
- Tighten the nut (Fig. 4-2.)
NOTE: In the event that the equipment has to be transported; the refrigerant tank scale MUST be
locked in place as follows:
FIG. 3
- Use two 10mm wrenches.
- Loosen the nut (Fig. 4-2.)
- Switch the machine on.
- Tighten the screw slowly (Fig. 4-1) until the display signals ZERO Ref. Available.
- Tighten the nut (Fig. 4-2) forcefully (using the second wrench to lock the screw (Fig. 4-1).
- Check that the screw (Fig. 4-1) is actually locked, if necessary repeat the locking operation from
the beginning.
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FIG. 4