Hoshizaki KML "F" SERIES User Manual download pdf (Page 89)

V. REMOVAL AND REPLACEMENT OF COMPONENTS

IMPORTANT

Ensure all components, fasteners and thumbscrews are securely in place

after the equipment is serviced.

IMPORTANT

1. The Polyol Ester (POE) oils used in R-404A units can absorb moisture

quickly. Therefore it is important to prevent moisture from entering the

system when replacing or servicing parts.

2. Always install a new filter drier every time the sealed refrigeration system is

opened.

3. Do not leave the system open for longer than 5 minutes when replacing or

servicing parts.

1. SERVICE FOR REFRIGERANT LINES

[a] REFRIGERANT RECOVERY

The icemaker unit is provided with two Refrigerant Access Valves–one on the low-side and

one on the high-side line. Using proper refrigerant practices recover the refrigerant from

the Access Valves and store it in an approved container. Do not discharge the refrigerant

into the atmosphere.

[b] EVACUATION AND RECHARGE [R-404A]

1) Attach Charging Hoses, a Service Manifold and a Vacuum Pump to the system. Be

sure to connect charging hoses to both High and Low -side Access Valves.

IMPORTANT

The vacuum level and Vacuum Pump may be the same as those for current

refrigerants. However, the rubber hose and gauge manifold to be used for

evacuation and refrigerant charge should be exclusively for POE oils.

2) Turn on the Vacuum Pump. Never allow the oil in the Vacuum Pump to flow backward.

3) Allow the Vacuum Pump to pull down to a 29.9" Hg vacuum. Evacuating period

depends on pump capacity.

4) Close the Low-side Valve and High-side Valve on the Service Manifold.

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Hoshizaki KML "F" SERIES User Manual Page 89