Table of Contents
Advertisement
Multi V™ Water Mini Units
General
The LG Multi V Water Mini system consists of a water source unit,
one or more indoor units, integrated system controls, and intercon-
necting field-provided refrigerant pipe containing various fittings
including Y-branch and Header kits supplied by LG. LG components
are manufactured in a facility that meets or exceeds International
Organization for Standardization (ISO) 9001 and 14001. The units
are listed by Intertek (ETL) and bear the ETL label, and are certified
to AHRI Standard 1230.
Frame
The frame is constructed with galvanized steel and finished with
baked enamel paint.
Casing
The water-source unit case is constructed from 20-gauge metal,
and is cleaned and finished with baked enamel finish. Paint color is
"warm gray."
Refrigeration System
The refrigeration system consists of a single refrigerant circuit and
uses R410A refrigerant. The water source unit is provided with
factory installed components, including a refrigerant strainer, check
valves, accumulator, hot gas bypass valve, four-way reversing valve,
electronic expansion valve (EEV), high and low side charging ports,
service valves, and interconnecting piping. The unit comes factory
charged with R410A refrigerant.
Refrigeration Oil Control
The refrigeration oil level in the compressor is maintained using
a control system. The water source unit microprocessor is
programmed to flush the refrigerant piping for a minimum period
of three (3) minutes after three (3) hours of compressor operation.
Compressor
The water source units are equipped with one hermetic, digitally
controlled, inverter driven, rotary compressor, which is manufactured
by LG. The frequency inverter is capable of providing a modulation
range from 30Hz–100Hz. The compressor motor is suction gas-
cooled and has an acceptable voltage range of ±10% of nameplate
voltage. The compressor is equipped with a crankcase heater.
An external pressure sensor and an external temperature sensor are
provided to protect the compressor from damage caused by over /
under temperature or over / under pressure conditions. The com-
pressor is provided with a positive displacement oil pump providing
sufficient oil film on all bearing surfaces across the entire inverter
modulation range. The compressor refrigerant oil is polyvinyl ether
MECHANICAL SPECIFICATIONS
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Multi V™ Water Mini Units
(PVE) having no hygroscopic
properties. The compressor is
wrapped with a heat resistant,
sound attenuating blanket and
mounted on rubber isolation
grommets.
Heat Exchanger
The water heat exchanger is a
stainless steel, type SUS316,
refrigerant / water plate heat
exchanger. The heat exchanger
requires a field-provided
50 mesh strainer and water
treatment to prevent scaling
inside the heat exchanger.
Closed loop condenser water
systems are recommended to
protect the factory mounted heat
exchanger.
Controls
Water source units are factory
wired with electrical control
components, printed circuit boards, thermistors, sensors, terminal
blocks, and lugs for power wiring. The control wiring circuit is low
voltage and includes a control power transformer, fuses, and inter-
connecting wiring harness with plug connectors. Microprocessor-
based algorithms provide component protection, soft-start capability,
and refrigerant system pressure and temperature control. The unit
is designed to provide continuous compressor operation with an
entering water temperature range of 23°F to 113°F for cooling mode,
and 23°F to 113°F for heating mode (Variable water flow control kit
[PRVC1] required for all entering water temperatures; one kit per
frame) (if entering water temperature falls below 42°F, glycol must
be added to the system). When the system is started, the connected
indoor units are automatically assigned an electronic address by the
water source unit's microprocessor. Additionally, each indoor unit is
capable of accepting a manual assignment of a secondary address
that, if used, provides unit tag identification when integrating with LG
V-Net control devices.
The water source unit microprocessor is provided with a three-digit,
LED display that communicates active system information and /
or malfunction codes. The microprocessor has an algorithm that
actively verifies the operational condition of system sensors and
thermistors. A power conditioning circuit is provided and designed
to protect the unit's inverter compressor and controls from phase
failure, over / under-voltage condition, and to prevent transmission of
power irregularities to the supply power source.
For indoor unit guide specifications, visit www.lghvac.com.
Figure 3: Multi V Water Mini Unit.
PRODUCT DATA | 9
Advertisement
Table of Contents
