Hoshizaki RM-26, Руководство по обслуживанию

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DISCONNECT UNIT FROM POWER SUPPLY BEFORE DOING ANY SERVICE
27. 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.
28. 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.
Instructions to Replace Compressor – Vacuum & Charging the System.