LGRED Installation Manual

MULTI
F
MAX
MULTI
F
WITH
12
MULTI F / MULTI F MAX with LGRED Outdoor Unit Installation Manual
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.
GENERAL DATA
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1
Capacity is rated with non-ducted IDUs, 0 ft. above sea level, with a 0 ft. level difference
between ODU and IDUs, and the following refrigerant pipe lengths:
LMU361HHV: 16.4 ft. Main + (16.4 ft. Branch x 5) = 98.4 ft.
LMU421HHV: 16.4 ft. Main + (16.4 ft. Branch x 6) = 114.8 ft.
LMU480HHV: 16.4 ft. Main + (16.4 ft. Branch x 8) = 147.6 ft.
All capacities are net with a combination ratio between 95 – 105%.
Rated cooling capacity obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF wet
bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
Rated heating capacity obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF wet
bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
2
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3
At least one Branch Distribution Unit is required for system operation; a maximum of two can be
installed per outdoor unit with use of Y-branch accessory (PMBL5620). At least two indoor units must be
connected. For allocated capacity information, see the combination tables in the “Multi F / Multi F MAX
with LGRED Combination Data Manual” on www.lghvac.com. For performance data, see “Multi F / Multi
F MAX with LGRED Performance Data Manual” on www.lghvac.com.
4
Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745. These values can
increase due to ambient conditions during operation.
5
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ble local and national codes. For detailed information, please refer to electrical characteristics on page
13.
6
Communications / connection (power) cable must be a minimum of 14 AWG, 4-conductor from the
outdoor unit to the BD unit, and 14 AWG, 4-conductor from the BD unit to the indoor unit, stranded,
shielded or unshielded (if shielded, it must be grounded to the chassis of the outdoor unit only), and
must comply with applicable local and national codes. For detailed electrical information, please refer to
electric characteristics on page 13.
7
Piping lengths are equivalent.
Model Number LMU361HHV LMU421HHV LMU480HHV
Capacity
Cooling (Btu/h) (Min.~Rated~ Max.)
1
10,800~36,000~47,000 10,800~42,000~53,000 10,800~48,000~58,000
Cooling Power Input (kW) (Min.~Rated~ Max.) 0.64~2.48~4.07 0.64~3.04~4.71 0.64~3.66~5.17
Cooling Running Current (A) (Min.~Rated~ Max.) 2.9~11.2~18.5 2.9~13.8~21.3 2.9~16.6~23.4
Heating (Btu/h) (Min.~Rated~ Max.)
1
12,420~45,000~50,000 12,420~48,000~54,500 12,420~52,500~59,000
Heating Power Input (kW) (Min.~Rated~ Max.) 0.71~3.30~4.31 0.71~3.70~4.70 0.71~4.25~5.09
Heating Running Current (A) (Min.~Rated~ Max.) 3.2~14.9~19.5 3.2~16.8~21.3 3.2~20.0~23.0
Operating Range
Cooling (°F DB)
2
14 to 118
Heating (°F WB) -13 to +64
Compressor
Inverter Quantity R1 Scroll x 1
Oil / Type FVC68D
Fan (Side Discharge)
Type Propeller
Motor Output (W) x Qty. 124.2 x 2
Motor / Drive Brushless Digitally Controlled / Direct
Maximum Air Flow Rate (CFM) 2,119 x 2
Unit Data
Refrigerant Type R410A
Refrigerant Control / Location Electronic Expansion Valve / Outdoor Unit
Minimum ~ Maximum Number Indoor Units / System
3
2~5 2~6 2~8
Max. Number of Branch Distribution Units 2
Min. ~ Max. Allowable Total Indoor Unit Connected Capacity (Btu/h) 18,000 ~ 48,000 18,000 ~ 56,000 18,000 ~ 65,000
Sound Pressure ±3 dB(A) (Cooling / Heating)
4
53 / 55 54 / 56
Dimensions (W x H x D [inch]) 37-13/32 x 54-11/32 x 13
Net / Shipping Unit Weight (lbs.) 218 / 243
Power Supply (V, Phase, Hz) 208 / 230V, 1, 60
Comm./Conn. (Power) Cable from ODU & BDU/BDU & IDU (No. X AWG)
5,6
4C x 14 / 4C x 14
Heat Exchanger
Material and Fin Coating Copper Tube / Aluminum Fin and GoldFin™ / Hydrophilic
Rows/Columns / Fins per inch x Qty. (2 x 32 x 14) x 2, (1 x 32 x 14) x 2
Piping
Liquid Line Connection (in., O.D.) x Qty. Ø3/8 x 1
Vapor Line Connection (in., O.D.) x Qty. Ø3/4 x 1
Factory Charge oz. of R410A 183.4
Additional Charging Volume (oz. / ft.)
Main Pipe 0.54
Branch Pipe 0.22
Piping Lengths
Maximum Total Piping (ft.)
7
475.7
Maximum Piping Length (No Additional Refrigerant [ft.]) 49.2 ft. of Main Piping + 131.2 ft. of Branch Piping
Maximum Main Pipe Length (ODU to BDU [ft.]) 180.4
Total Branch Piping (BDU to all IDU [ft.]) 295.3
Maximum Branch Pipe Length (Length between each BDU & IDU [ft.]) 49.2
Maximum Outdoor Unit to IDU Pipe Length (ft.) 229.6
Maximum Elevation between ODU and IDU (ft.) 98.4
Maximum Elevation between Indoor Unit and Indoor Unit (ft.) 49.2
Maximum Elevation between BDU and IDU (ft.) 32.8
Maximum Elevation between BDU and BDU (ft.) 49.2