INSTALLATION STEPS
11
IMPORTANT: Keep the refrigerant lines free of debris and moisture.
Ensure all line set tubing meets R-410A refrigerant requirements.
Install the line set with as few bends as possible, reducing the number of 90° bends where possible. Care must be taken not to
damage or kink the tubing. Use ACR, hard drawn copper tubing where no appreciable amount of bending around obstructions
is necessary. If soft copper must be used, care must be taken to avoid sharp bends which may cause a restriction.
The line set should be installed so it will not obstruct service access to the Acadia outdoor unit, indoor air handler panels, or air
filter.
Care must be taken to isolate the refrigerant lines for noise transmission and vibration from the equipment to the structure.
The vapor line must be insulated with a minimum of 1/2" wall foam rubber insulation. The liquid line must also be insulated
with a minimum of 1/2" wall foam rubber insulation separately from the vapor line.
Use PVC or other suitable piping as a conduit for all underground installations.
When passing refrigerant tubes through a wall, seal the opening with a sealing material such as RTV or other pliable silicon-
based caulk around the refrigerant lines where they penetrate to reduce vibration and to retain flexibility.
Use only long radius 90° for any hard drawn copper.
BRAZING CONNECTIONS
(CAUTION) Purge the line set with nitrogen before and while brazing to prevent internal carbonization, to prevent contaminates
from entering the system, and to protect the POE oil. Use industry standard brazing practices. The use of a brazing shield may be
required to keep from burning the side panel of the indoor and/or outdoor unit(s).
1. Run the line set from the Acadia outdoor unit to the indoor air handler. Be sure to keep the ends of the tubes sealed so no
foreign debris or moisture can get into the tubing.
2. Remove the
Schrader valve core from the vapor service valve. Set the nitrogen purge to no more than 2 PSI standing pressure.
3. Brazing one joint at a time, work your way around the line set, starting with the vapor line connection at the Acadia outdoor
unit. Be sure to wrap the service valves with a heat sink such as wet cloths. This protects the service valves from overheating.
4. At the indoor air handler, braze the vapor line to the vapor connection on the air handler.
5. indoor air handler, insert a short piece of 3/8 tube and braze the joint.
6. Install the liquid line filter drier air handler and braze in place.
7. Insset into the other end of the filter drier and braze in place.
8. Remove the Schrader valat the Acadia outdoor unit.
9. Wrap the service valve with a heat sink such as wet cloths, preventing the service valve from overheating. Insert the pipe and
braze into place. The use of a brazing shield may need to be used to keep from burning the side panel.
10. Re-install the Schrader valve cores into the vapor and liquid service valves.
11. Leak test the line set by adding 400 PSI of nitrogen to the line set and indoor air handler coil.
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