Mechanical Specifications - LG MULTI V 5 Engineering Manual

MECHANICAL SPECIFICATIONS

Multi V 5 Outdoor Units
Multi V 5 Outdoor Units
General
LG Multi V 5 Variable Refrigerant Flow (VRF) outdoor unit can be configured to operate as a Heat Pump
system or a Heat Recovery System. Single, dual, or triple frame outdoor unit combinations are connected
to indoor units with a single refrigerant piping system using factory designed and supplied Y-branches,
Headers, and/or Heat Recovery Units and have integrated controls.
The system is capable of being designed for minimum piping and maximum design flexibility. Each Heat
Recovery Unit piping port is independently capable of operating in either heating or cooling mode regard-
less of the mode of other piping ports on the same heat recovery unit or in the system. The Heat Recovery
Unit is capable of changing mode of individual indoor units or zones (cooling to heating or heating to
cooling) within a maximum time frame of three (3) minutes to ensure indoor temperature can be properly
maintained.
LG components are manufactured in a facility registered to ISO 9001 and ISO 14001, which is a set of
standards applying to environmental protection set by the International Organization for Standardization
(ISO). The units are Electrical Testing Laboratories (ETL) listed and bear the ETL label. All internal wiring
is in accordance with the National Electrical Code (NEC).
Temperature Ranges
Heat Pump Configuration
In Heat Pump configuration, the system can operate in heating only mode (i.e. all indoor units in heating mode) from -13°F to 61°F
outdoor ambient wet bulb. Heat Pump systems can operate in cooling mode from 5°F to 122°F outdoor ambient dry bulb. Optional low am-
bient cooling kit extends the cooling only operating range (i.e., all indoor units in cooling mode) down to -9.9°F. See the Multi V 5 Installation
Manual for DIP switch settings for Heat Pump operation.
Heat Recovery Configuration
In Heat Recovery configuration, the system can operate in heating only mode (i.e. all indoor units in heating mode) from -13°F to 61°F out-
door ambient wet bulb. Heat Recovery systems can operate in cooling only mode from 5°F to 122°F outdoor ambient dry bulb. Optional low
ambient cooling kit extends cooling only operation range (i.e. all indoor units in cooling mode) down to -9.9°F. Heat Recovery synchronous
operation range is 14°F to 81°F outdoor ambient dry bulb. See the Multi V 5 Installation Manual for DIP switch settings for Heat Recovery
operation.
Casing / Frame
Outdoor units are constructed with galvanized steel, bonderized and finished with baked enamel paint. Each frame has a removable inspec-
tion panel to allow access to service tool connections, DIP switches, auto addressing, and error codes. The entire front panel of the outdoor
unit is removable for maintenance.
Outdoor unit frames are completely factory assembled, piped and wired. Dual and triple frame outdoor units are field piped with factory
designed and supplied outdoor unit Y-branch kits to manifold them together into a single refrigerant circuit.
Refrigerant System
The refrigeration system consists of a single refrigeration circuit and uses R410A refrigerant. The outdoor unit is provided with factory
installed components, including a refrigerant strainer, check valves, oil separator, oil level sensor, accumulator, four-way
reversing valves, electronically controlled expansion valve (EEV), high and low side charging ports, high pressure safety switch, service
valves, and interconnecting piping. Also included is an integral subcooler assembly consisting of a double spiral tube-type subcooling heat
exchanger and EEV providing modulation of up to 23ºF subcooling.
Compressors
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digitally controlled inverter-driven hermetic scroll compressors to modulate capacity (variable from 12 to 150Hz). An internal thermal over-
load, and a factory-mounted 60 watt crankcase heater are included on all compressors.
Outdoor Unit Coil
The outdoor unit coils are of a nonferrous construction with louvered aluminum fins on copper tubing, and are protected by a metal guard.
Coil fins have a factory applied corrosion resistant Black Fin™ and hydrophilic coating.
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