Refrigerant Charging; Branch Pipe Fitting - LG Multi V PRHR042A Installation Manual

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Refrigerant charging

For Heat Recovery System Installation
Ⓐ Manifold Gauge
Ⓑ Low pressure side Handle
Ⓒ High pressure side Handle
ARUB***GSS4
ARUM***GSS5
Liquid Pipe
For Heat Pump System Installation
Ⓐ Manifold Gauge
Ⓑ Low Pressure Side Handle
Ⓒ High Pressure Side Handle
Low Pressure gas pipe
Liquid pipe
High Pressure gas pipe

Branch pipe Fitting

Y branch
A
• Ensure that the branch pipes are attached horizontally or vertically.
(see the diagram below.)
Low Pressure
Gas Pipe
Straight-through Leg
High Pressure Gas Pipe
Liquid Pipe
WARNING
!
• Pipe to be vacuumed : gas pipe, liquid pipe
• If the refrigerant amount is not exact, it may not operate
properly.
• If additionally bottled refrigerant amount is over 10 %,
condenser burst or insufficient indoor unit performance may be
caused.
• Low pressure gas pipe should be sealed with a cap in piping
accessories during refrigerant charging.
Branch Leg
±5°
Horizontal
Plane
±5°
Y-branch Inlet
Outdoor Unit is Permitted.
Not used
(keep closed)
Gas pipe
Ⓐ To Outdoor Unit
B Ⓑ To Branch Piping or Indoor Unit
-3° +3° -3° +3°
Vertical DOWN
Configuration for
Indoor Unit
Y-Branches.
Vertical UP
Configuration for
Indoor Unit
Y-Branches.
Outdoor Unit is Not Permitted.