Removal And Replacement Of Hot Gas Valve And/Or Line Valve - Hoshizaki KM-1300SWH-E Service Manual

6. REMOVAL AND REPLACEMENT OF HOT GAS VALVE AND/OR LINE VALVE

Always use a copper tube of the same diameter and length when replacing
the hot gas lines; otherwise the performance may be reduced.
Always install a new Drier every time the sealed refrigeration system is
opened. Do not replace the Drier until after all other repairs or replace-
ments have been made.
1) Turn off the power supply. If the unit is equipped with a plug, unplug it.
2) Remove the panels.
3) Recover the refrigerant and store it in an approved container.
4) Remove the screw and the Solenoid.
5) Disconnect the valve using brazing equipment.
6) Install the new valve.
Always protect the valve body by using a damp cloth to prevent the valve
from overheating. Do not braze with the valve body exceeding 250°F
(121°C).
7) Install the new Drier.
8) Check for leaks using nitrogen gas at 140 PSIG (9.84 Kg-f/cm
9) Evacuate the system, and charge it with refrigerant. For air-cooled and water-cooled
models see the Nameplate for the required refrigerant charge. For remote air-cooled
models, see the Charge Label in the machine compartment.
10) Cut the leads of the Solenoid allowing enough lead length to reconnect using closed
end connectors.
11) Connect the new Solenoid leads.
12) Attach the Solenoid to the valve body, and secure it with a screw.
IMPORTANT
IMPORTANT
WARNING
34
2
) and soap bubbles.