Hot Gas Valve - Hoshizaki KMD-201AWA Service Manual

5) Remove the drier using brazing equipment.
6) Braze the new drier, with the arrow on the drier in the direction of the refrigerant flow. Use
nitrogen gas at a pressure of 20 to 30 kPa when brazing tubings. Braze in an access
valve using a tee if necessary.
7) Check for leaks using nitrogen gas (970 kPa) and soap bubbles.
8) Evacuate the system and charge it with refrigerant (see "V. 1. [c] EVACUATION AND
RECHARGE").
9) Refit the panels in their correct positions.
10) Turn on the power supply.
Note: Always use a drier of the correct capacity and refrigerant type.

5. HOT GAS VALVE

To ensure optimum performance, use a copper tube of the same diameter and
length for replacement of the hot gas circuit.
Always install a new drier every time the sealed refrigeration system is opened.
Do not replace the drier until after all other repair or replacement has been made.
1) Turn off the power supply.
2) Remove the panels.
3) Recover the refrigerant and store it in an approved container.
4) Disconnect the hot gas valve leads.
5) Remove the screw and the solenoid coil.
6) Remove the valve and drier using brazing equipment.
7) Braze the new hot gas valve with nitrogen gas flowing at a pressure of 20 to 30 kPa.
Always protect the valve body by using a damp cloth to prevent the valve from
overheating. Do not braze with the valve body exceeding 135°C.
CAUTION
IMPORTANT
WARNING
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