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Owners Manual Ecos
aire
®
CM Series Precision Air Conditioner
Ecos
aire
®
July 2007 61
Data subject to change without notice.
Prepare to Add Refrigerant Startup
For Air-Cooled Direct Expansion or Air-Cooled DualCool units, the required weight of refrigerant should
have been added when the remote condenser was installed in
Installation - Piping - Refrigerant
. If all
the necessary refrigerant was not added during installation, it must be added at startup.
If the total amount of refrigerant cannot be pumped into the high-pressure access valve while the com-
pressor is OFF, then refrigerant vapor only can be added to the unit through the suction access valve while
the compressor is running.
NEVER ADD LIQUID REFRIGERANT TO THE SUCTION ACCESS VALVE.
Units with two refrigeration circuits will have two sight glasses and two suction access valves.
Arrange as below to add refrigerant. Close the access panels as far as possible and temporarily tape
them in place for operation later.
Air-Cooled Direct Expansion & Air-Cooled DualCool Units Only
preferred refrigerant-adding ports (by others)
Compressor must be
OFF
.
Be sure that the following manual valves
have been opened:
For all units, be sure that the compressor
isolation valves (if any) are
a) in the run (backseated) position, or
b) in the access (middle) position if
pressure gauges are connected.
ST
ARTUP
SAMPLE
Number and location of
component
s may vary
.