Removal And Replacement Of Hot Gas Valve And .............................. Line Valve - Hoshizaki KML-200MAE Service Manual

4) Remove the insulation and the Expansion Valve Bulb on the suction line.
5) Remove the Expansion Valve Cover, and disconnect the Expansion Valve using
brazing equipment.
6) Braze the new Expansion Valve, with nitrogen gas flowing at the pressure of 3 - 4
PSIG.
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.
7) Install the new Drier.
8) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles.
9) See the Nameplate for the required refrigerant charge.
10) Attach the Bulb to the suction line in position. Be sure to secure it with clamps and
to insulate it.
11) Place the new set of Expansion Valve Covers in position.
12) Replace the panels in their correct positions.
13) Turn on the power supply.
6. REMOVAL AND REPLACEMENT OF HOT GAS VALVE AND 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.
WARNING
CAUTION
37