Service Manual

DISCONNECT UNIT FROM POWER SUPPLY BEFORE ANY SERVICE
Instructions to Replace Compressor.
Instructions to Replace Compressor – Vacuum & Charging the System.
28. After the vacuum process has been finished,
close the valves of the manifold gauges and
proceed to connect the hose from the refrigerant
tank to the service line of the manifold. Open the
low pressure valve as well as the tank valve to
charge the refrigerant. Inject the amount specified
in the serial name plate of R-134a refrigerant into
the refrigeration system.
Wait until the pressure readings of the system have
equalized and then turn on the cooler.
29. Unplug the cooler. Pinch the service tubes using a vise pinch and
proceed to remove the manifold gauges and piercing valve. Check for
refrigerant leaks using a leak detector.
NOTE: To avoid leaks that may originate from Schrader Valves when
installed for service in the future, proceed to pinch off the tubing
using a vise grip and braze it with oxyacetylene welding. Check for
refrigerant leaks using a leak detector in all the soldered joints.
DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE