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MULTI V IV System Installation Manual
Due to our policy of continuous product innovation, some specications may change without notication.
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Heat Recovery Unit Connections
Service Port
Liquid pipe
Low Pressure
Gas pipe
High Pressure
Gas pipe
Leakage Prevention Cap
Refrigerant Charging Port
1. Remove the leak-prevention cap.
2. Check if the liquid, low pressure vapor, and high pressure vapor pipes are
locked.
3. Vacuum out any remaining refrigerant or air through the service port.
Pipe Connections Between Outdoor Units and Indoor Units
• Refrigerant piping can be positioned through front or bottom access holes on
the outdoor unit, depending on installation needs.
• Access holes at the bottom of the unit can be used for left / right or bottom
pipe routings.
• Use nitrogen at 2.8 psi of flow during welding.
If nitrogen was not used while brazing, oxidized materials may form
inside the pipe which may affect the operation of the valves and
condensers.
Avoid Pipe Damage
• When routing field-provided piping inside the outdoor unit frame,
avoid causing vibration that will damage the components.
• Correctly route the piping so it does not make contact with the
compressor casing, terminal cover, or mounting bolts. Allow
room for field installation.
• Properly insulate all refrigerant pipes separately up to the service
valve body inside the confines of the unit frame.
Left Side Pipe Access
Front Side Pipe Access Hole
Right Side Pipe Access
Figure 34: Piping Route Options.
REFRIGERANT PIPING DESIGN
Removal Area for Liquid/Vapor pipe
bottom/side connections.
Figure 35: Access Hole at Bottom of Outdoor Unit.
Figure 36: Interior View of
Heat Recovery Unit.
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