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8. Installation, System Processing and Commissioning
Utmost care must be taken while handling the Water-Cooled Scroll
condensing unit. Please go through the contents below to ensure proper
handling.
a. Inspection
Inspect the condensing unit and any accessories shipped with them for
damages or shortages before and during unloading. All items on bill of lading
should be accounted for prior to signing the shipping receipt. Note any
shortages or damage on delivery receipt (specify the extent and type of
damage found). Unit should be inspected carefully for concealed damage.
Notify Emerson sales/application personnel of the damage immediately. Do
not repair the unit until instructed by Emerson's representative.
The system is shipped with a holding charge of dry nitrogen. Check to see
that pressure is still in the unit upon receipt. Report lack of pressure
immediately to the Emerson's application/sales representative.
b. Location and Fixing
Generally installed on the top of the cold room to reduce the connection
length between the condensing unit and the evaporator. Enough space to be
provided around the unit for easy service. Also ensure easy access to the unit.
c. Refrigeration Piping Installation
All interconnecting pipes should be of refrigeration grade, clean, dehydrated
and must remain capped at both ends until installation. Even during installa-
tion, if the system is left for any reasonable period (say two hours), pipes
should be re- capped to prevent moisture and contaminants from entering
the system.
Do not assume that the service connection sizes on the unit (at the service
valves) are the correct size to run your interconnecting refrigeration pipes.
The service valve sizes have been selected for convenience of installation and
in some cases (larger units) these may be considered too small. However, for
the very short pipe run within our units, these service connection sizes are
adequate.
The pipe should be sized to ensure optimum performance and proper oil
return. The sizing must also consider the full capacity range through which
this particular unit will need to operate.
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