Piping Connections / Pipe Routes - LG ARUM072BTE5 Installation Manual

INSTALLING FOR HEAT PUMP
OPERATION

Piping Connections / Pipe Routes

Piping Connections for Heat Pump Operation
Use the correct outdoor unit connections to join the outdoor unit to the branch piping
in the indoor unit refrigeration system. The outdoor unit and branch piping require
brazed connections; indoor units require flare connections to the refrigerant system.
Multi V 5 outdoor units designed for heat pump operation use only the liquid pipe
and vapor pipe connections as shown in the diagram at right. For heat pump opera-
tion, the middle pipe is NOT used and must be kept closed and capped.
WARNING
It is important 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 important 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
Liquid Pipe
Vapor Pipe
64
Vapor Pipe
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Piping Connections for Heat Pump Operation.
Liquid Pipe
Pipe Not Used for
Heat Pump Systems
(Keep Closed
and Capped)
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 Pump Operation
Fr ont Pipe Route
Pipe Not Used for Heat Pump
Systems (Keep Closed and
Capped)
Vapor Pipe
Right Side
Pipe Route