Piping Connections / Pipe Routes - LG ARUM072BTE5 Installation Manual

INSTALLING FOR HEAT RECOVERY
OPERATION

Piping Connections / Pipe Routes

Piping Connections for Heat Recovery
Operation
Use the correct outdoor unit connections to join the outdoor unit to the branch pip-
ing in the indoor unit refrigeration system. The outdoor unit, heat recovery unit, and
branch piping require brazed connections; indoor units require flare connections to
the refrigerant system.
Multi V 5 outdoor units designed for heat recovery operation use the liquid pipe,
high pressure vapor, and low pressure vapor pipe connections as shown in the
diagram at right.
WARNING
It is imperative that the correct outdoor unit connections be used for the intended system
operation (heat pump versus heat recovery). If the wrong connections are used, it may
result in refrigerant leaks, which may lead to illness or death.
It is imperative that the correct outdoor unit connections be used for the intended system
operation (heat pump versus heat recovery). If the wrong connections are used, it may
result in refrigerant leaks, which may lead to system malfunction or even failure to work
at all.
Pipe Routes
Choose from three pipe routes from out of the outdoor unit to the indoor unit refrigerant system:
• Front Pipe Route.
• Left Side Route (Pipes are routed through the bottom of the outdoor unit).
• Right Side Route (Pipes are routed through the bottom of the outdoor unit).
The pipe route chosen depends on the installation area, and is at the discretion of the installer.
After the pipe route is chosen, the appropriate outdoor unit access holes must be knocked out
(see next page for knock out information).
Front Pipe Route.
Liquid Pipe
Low Pressure Vapor Pipe
Liquid Pipe
High Pressure Vapor Pipe
Low Pressure Vapor Pipe
86
High Pressure Vapor Pipe
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Piping Connections for Heat Recovery Operation.
Liquid Pipe
Low Pressure
Vapor Pipe
High Pressure
Vapor Pipe
Pipe Route Options.
Left Side
Pipe Route
Left and Right Side Routes (Pipes are Routed Through the Bottom of
the Outdoor Unit).
Liquid pipe
Remove Knock Out Holes for the Pipes
Service Ports for Heat Recovery Operation
Right Side
Pipe Route
Front Pipe Route
Low Pressure Vapor Pipe
High Pressure
Vapor Pipe