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Air-Cooled Direct-Expansion and Air-Cooled DualCool Units Only
Ecos
aire
®
CM Series Precision Air Conditioner Owners Manual
30
Ecos
aire
®
July 2007
Data subject to change without notice.
Installation Piping Refrigerant-Tube Joining
After eliminating all leaks, locate the refrigerant receiver in the remote condenser
unit. Open the rotalock valves on the receiver.
evacuation manifold
(by others)
essential electronic
evacuation gauge
(by others)
hose (by others) to
hot-gas-tube access
valve
liquid-line access valve
added previously
(by others)
Open the compressor service valves (if any) to the access (middle) position. The
Ecosaire® unit, condenser, and tubes must be evacuated to a pressure below 500
microns of mercury as measured by an electronic vacuum gauge.
Compound gauges
as found on refrigeration manifolds are inadequate.
IMPORTANT!
Under no circumstances use the compressor as a vacuum pump or apply power to a compressor under
vacuum. Damage to the motor windings will result.
Connect a good set of refrigeration service gauges, an electronic micron-level vacuum gauge, and a vacuum pump
as shown below. Use core-removal adapters to remove the cores from Schraeder-type access valves.
To insure a correct vacuum reading, install the electronic vacuum gauge far away from the vacuum pump
or use a reliable vacuum valve to isolate the gauge and system from the pump while reading the vacuum.
Colder ambient temperatures require longer evacuation times. Allow enough time at low pressures to remove any
water from the tubes. The triple-evacuation method can be helpful.
After proper evacuation, break the vacuum with vapor refrigerant until a positive pressure is reached.
Replace the access valve cores and remove the adapters.
Close the compressor rotalock valves.
Add the specified weight and type of refrigerant (by others), as calculated on previous page, through the high-
pressure access valve.
DO NOT put liquid refrigerant into the low-pressure access valve.
Open compressor
rotalock valves to
access position during
evacuation.
INST
ALLA
TION
SAMPLE
Number and location of
component
s may vary
.
SAMPLE
Number
, location, and
appearnce of component
s
may vary
.