Hoshizaki F-2000MLH, Service Manual

Page: 72 / 81

72
13. REMOVAL AND REPLACEMENT OF EVAPORATOR PRESSURE
REGULATOR (E.P.R.) - F-2000MLH/-C ONLY
1) Turn off the power supply.
2) Close the Shut-off Valves to the Compressor Rack Assembly.
3) Remove the panels.
4) Recover the refrigerant and store it in an approved container.
5) Remove the E.P.R. using brazing equipment.
6) Braze the new E.P.R. with nitrogen gas flowing at a pressure of 3 - 4 PSIG.
WARNING
Always protect the E.P.R. by using a damp cloth to prevent the E.P.R.
from overheating. Do not braze with the E.P.R. exceeding 250°F.
7) Insert the Valve Core into the Access Valve.
8) Check for leaks using nitrogen gas (140 PSIG)
and soap bubbles.
9) Evacuate the system.
10) Replace the panels in their correct position.
11) Open the Shut-off Valves to the Compressor
Rack Assembly.
12) Turn on the power supply.