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WATER SOURCE
UNIT PRODUCT
DATA
Mechanical Specifications on page 9
Product Features and Benefits on page 11
General Data on page 13
Electrical Data on page 16
Connection Limitations on page 17
Dimensions on page 18
Wiring Diagrams on page 21
Refrigerant Flow Diagrams on page 22
Acoustic Data on page 30
Head Loss by Water Flow on page 33
Accessories on page 34
Multi V Water V 575V Water Source Outdoor Units
General
An LG Multi V Water V 575V variable refrigerant flow (VRF) water source unit (WSU) oper-
ates 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 regardless 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 meeting International Organization for Stan-
dardization (ISO) 9001 and ISO 14001 standards. ISO 9001 defines quality management and
ISO 14001 defines environmental management. The units are listed by Intertek Electrical
Testing Laboratories (ETL) and bear the ETL label. Wiring in these units are 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 with an entering water
temperature (EWT) of 14°F to +113°F. Heat pump units can operate in cooling only mode with an
EWT of 23°F to +113°F.
Heat Recovery Configuration
In Heat Recovery configuration, the system can operate in heating only mode with an entering water temperature (EWT) of 14°F to +113°F. Heat
recovery units can operate in cooling only mode with an EWT of 23°F to +113°F.
Casing / Frame
Multi V Water V 575V units are constructed with galvanized steel, bonderized and finished with powder coat baked enamel paint. Each frame
has a removable inspection panel to allow access to service tool connection, DIP switches, auto addressing, and error code display without
removing the entire front panel. The entire front panel of the WSU is removable for maintenance.
WSU frames are completely factory assembled, piped and wired. Dual and triple frame WSUs must be field piped with factory designed and
supplied Y-branch kits to manifold them together into a single refrigerant circuit.
Refrigerant System
The refrigeration system is a single refrigeration circuit using R410A refrigerant. The WSU is provided with factory-installed components
including a refrigerant strainer, check valves, oil separator, accumulator, hot gas bypass valve, four-way reversing valve, electronic con-
trolled 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 refrigerant
subcooling modulation up to 25ºF.
© LG Electronics Canada, Inc., North York, ON Canada. All rights reserved. "LG" is a registered trademark of LG Corp.
MECHANICAL SPECIFICATIONS
Figure 3: Single-Frame Multi V Water V 575V
Water Source Unit.
WSU PRODUCT DATA | 9
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