INSTALLATION STEPS
12
IMPORTANT: Open all service ports and all flow-control devices once the system is piped. Do not leave the system open to the
atmosphere. The POE oil in the compressors is extremely susceptible to moisture absorption. Always keep the ends of the tubing
sealed during the installation and free of debris.
LEAK TESTING
Pressurize the system with 400 PSI of nitrogen. Leak test all the joints on the Acadia outdoor unit, the indoor air handler unit, and
the refrigerant tubing. Open both service valves by turning the center stem fully counter clock-wise until the stem reaches the top
of the valve (back-seating the valve).
(NOTE) Ensure both service valves are open and back-seated and the nitrogen purge is removed before evacuation.
(NOTE) The Acadia outdoor unit is charged with 50 PSI of dry nitrogen that must be released before evacuation.
EVACUATE THE ACADIA OUTDOOR UNIT, THE INDOOR AIR HANDLER UNIT, AND THE REFRIGERANT TUBING
Evacuation requires a vacuum pump capable of achieving a minimum vacuum below 500 microns and a micron gauge for accurate
indication of vacuum levels. Setup the vacuum pump and evacuate to at least 500 microns.
(NOTE) Be sure to use a manifold set, a micron gauge, and a vacuum pump that are in good working condition and leak free.
The vacuum method is the most effective way of assuring a system is free of air, leaks, and moisture. The refrigerant system must
be evacuated down to a minimum of 500 microns. Once 500 microns has been reached, the system should be sealed off and held at
500 microns for a minimum of 15 minutes to perform a free air test.
IMPORTANT: Break any system under a vacuum with nitrogen pressure for repairs or refrigerant for charging, preventing ambient
air from entering the system.
FINAL TUBING CHECK
IMPORTANT: Ensure both the Acadia outdoor unit and indoor air handler unit insides have not shifted during shipment. Ensure
the tubes are not rubbing against each other or on any sheet metal. Pay close attention to the distributor tubes and service port
connections. Check the insulation on the vapor and liquid lines; making sure it is sealed properly with tape or glue.
Step 6 – Making Electrical Connections
(DANGER) To avoid personal injury or death, do not supply power to the Acadia outdoor unit with the compressor terminal box
cover removed.
(CAUTION) Be sure the field wiring complies with local and national fire, safety, and electrical codes, and the voltage to the
system is within limits shown on the unit rating plate. Contact the local power company for correction of improper voltages. See
the unit rating plate for the recommended circuit protection device.
(NOTE) See the unit rating plate. Do not install a unit in an area where voltage may fluctuate outside of the normal voltage
fluctuations of 198VAC – 253VAC, in accordance with the specification sheet in (Appendix G). Operation of the Acadia outdoor
unit with improper line voltage constitutes abuse and could affect the unit reliability.
(NOTE) Install a branch circuit disconnect of adequate size, per the NEC, to handle the system starting current. Locate a circuit
disconnect within sight from and readily accessible from unit(s), per Section 440 of NEC.
(NOTE) Use copper conductors only, between the disconnect switch and the Acadia outdoor unit and the indoor air handler unit.
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