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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 on the low-side and high-
side lines. 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-side and low-side lines 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 back-
ward.
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.