Hoshizaki F-2000MLH, Service Manual

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14. REMOVAL AND REPLACEMENT OF BY-PASS VALVE - F-2000M_H/-C
SERIES ONLY [EXCEPT F-2000MLH/-C]
CAUTION
Always use a capillary tube of the same diameter and length when replacing
the by-pass lines; otherwise the performance may be reduced.
IMPORTANT
Always install a new Drier every time the sealed refrigeration system is
opened. Do not replace the Drier until after all other repair, or replacements have
been made.
1) Turn off the power supply.
2) Remove the Front Panel.
3) Recover the refrigerant and store it in an approved container.
4) Remove the screw and the Solenoid.
5) Disconnect the By-pass Valve using brazing equipment.
6) Install the new valve.
CAUTION
Always protect the valve body by using a damp cloth to prevent the valve from
overheating. Do not braze the valve body exceeding 250°F.
7) Install the new Drier.
8) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles.
9) Evacuate the system, and charge it with refrigerant. For the water-cooled models, see
the Nameplate for the required refrigerant charge and type. For the remote air-cooled
models, see the label on the Control Box.
10) Cut the leads of the Solenoid allowing enough lead length to reconnect using closed
end connectors.