Haier MVHR072ME2CA1 Manuel D'installation page 16

INSTALLATION INSTRUCTIONS
1. Refrigerant Pipe Connection
Pipe Connection Method:
• The refrigerant lines should be as short as possible to
ensure efficiency.
• Lubricate the flare fittings with refrigerant oil prior to
assembly.
• Always use a tubing bender when creating bends in the
refrigerant tubing.
• Align the tubing with the flare fittings before attempting
to thread the flare nut. Cross-threading can damage the
fitting. Always start threads by hand.
• Please refer to fastening torque in the "Pipe Specs and
Fastening Torque" section.
• Seal any tubing that is not being used to avoid material
damage.
Pipe Installation Precautions
1. Add dry nitrogen at 2-3 psi to the inside of the
copper tubing for brazing to prevent oxidation and
contamination of the system.
2. Copper refrigeration tubing should be clean and free
of debris before brazing. Run dry nitrogen through the
tubing at about 2 to 3psi with the tubing ends partially
obstructed to prevent oxidation and contamination.
3. The piping installation should be executed after closing
the stop valves.
4. Use a proper tubing cutter to cut copper tubing.
5. It is recommended to use a 15% silver brazing material
when joining copper tubing. Flux is not necessary when
joinging copper to copper and is not recommended.
Backup
Wrench
Torque
Wrench
6. To avoid personal injury and property damage, ensure
pipeline refrigerant has been evacuated before service
is completed.
NOTE: Always use a backup wrench when tightening
and loosening flare nuts. Tubing will twist if not properly
supported. The flare nut or flare fitting will be damaged
if the tubing is not properly aligned with the flare fitting
when starting the flare nut. Do not use tools to start the
flare nut, but use hands only to begin threading the nut.
16
1. Refrigerant Pipe Connection
Pipe Material and Specs Selection
1. Please select the refrigerant pipe following the material
2. Thickness and Specs:
3. Use only branch and gater fittings made by Haier.
4. Refer to the operating instructions when installing stop
5. Follow the installation guide or the selection software
6. Follow the installation manual for branch and gather
Piping Storage Requirements
First, clean the pipe.
Connector
Nut
below.
Material: Type L or Type K copper refrigeration tube.
Model: C1220T-1/2H (diameter is over 3/4" (19.05mm)):
C1220T-0(diameter is below 5/8" (15.88)).
Confirm the pipe thickness and specs according to the
pipe selection method (the unit is charges with R410A).
valves.
for piping installation instructions.
pipe installation instructions.
Position Installation Period
Outdoor More than 1 month
Less than 1 month
Indoor Nothing to do with period
Measures
Flat the pipe end
Flat the pipe end or seal
with adhesive tape
31-5000573 Rev. 2