LG LMU481HV Multi F MAX Outdoor 4.0 Ton Heat Pump Unit User Manual
- June 4, 2024
- LG
Table of Contents
LG LMU481HV Multi F MAX Outdoor 4.0 Ton Heat Pump Unit
LMU481HV
Multi F MAX Outdoor Unit
4.0 Ton Heat Pump
Performance
Cooling Capacity (Min.‐Rated‐Max., Btu/h) 10,800~48,000~58,000
Heating Capacity (Min.‐Rated‐Max., Btu/h) 12,420~54,000~59,000
Max. Heating Capacity at 17°F (Btu/h)| 47,690
Max. Heating Capacity at 5°F (Btu/h)| 40,190
Max. Heating Capacity at ‐4°F (Btu/h)| 35,070
Cooling COP @95°F (Rated)
3.75
Heating COP @47°F (Rated) 3.50
Cooling Nominal Test Conditions:
- Indoor: 80°F DB / 67°F WB
- Outdoor: 95°F DB / 75°F WB
Heating Nominal Test Conditions:
- Indoor: 70°F DB / 60°F WB
- Outdoor: 47°F DB / 43°F WB
Electrical
- Power Supply (V/Hz/Ø)1 208-230V, 60, 1
- MOP (A) 40
- MCA (A) 32.7
- Cooling Rated Amps (A) 29.2
- Heating Rated Amps (A) 29.2
- Compressor (A) 22.0
- Fan Motor (A) 1.6 x 2
- Locked Rotor Amps (A) 22
MOP ‐ Maximum Overcurrent Protection MCA – Minimum Circuit Ampacity
Piping:
- Refrigerant Charge (lbs.) 9.26
- Liquid Line Connection (in., O.D.) Ø3/8 x 1
- Vapor Line Connection (in., O.D.) Ø3/4 x 1
- Maximum Total Piping² (ft.) 475.7
- Min. / Max. ODU to IDU Piping3 (ft.) 32.8 / 229.6
- Piping Length4 (no add’l refrigerant, ft.) 180.4
- Maximum Elevation between ODU and IDU (ft.) 98.4
- Maximum Elevation between IDU and IDU (ft.) 49.2
ODU = Outdoor Unit
IDU = Indoor Unit
Features
- R1 Scroll (Variable Speed) Compressor
- Auto operation
- Auto restart
- Self-diagnosis
- Defrost / Deicing
- Low ambient cooling down to 14°F
- Soft start
- Restart delay (three [3] minutes)
Optional Accessories
- PI‐485 ‐ PMNFP14A1
- AC Smart 5 ‐ PACS5A000
- ACP 5 ‐ PACP5A000
- MultiSITE™ Comm. Mgr. ‐ PBACNBTR0A
- Power Distribution Indicator (PDI) Premium ‐ PQNUD1S41
- Mobile LGMV ‐ PLGMVW100
- Low Ambient Wind Baffle (Cooling Operation Down to ‐4°F) ‐ ZLABGP04A x2
- Drain Pan Heater ‐ PQSH1200
Required5 Accessories:
- 2 Port BD Unit ‐ PMBD3620
- 3 Port BD Unit ‐ PMBD3630
- 4 Port BD Unit ‐ PMBD3640
- 4 Port BD Unit ‐ PMBD3641
Operating Range
Cooling (°F DB)¹5 14 to 118
Heating (°F WB) ‐4 to +64
Unit Data:
- Refrigerant Type R410A
- Refrigerant Control EEV
- Sound Pressure (Cool / Heat) ±1 dB(A)6 53 / 55
- Net / Shipping Weight (lbs.) 192 / 216
- Heat Exchanger Coating Gold Fin™
- Minimum No. of Indoor Units 2
- Maximum No. of Indoor Units 8
Compressor:
- Type R1 Scroll
- Quantity 1
- Oil / Type FVC68D
Fan:
- Type Propeller
- Quantity 2
- Motor / Drive Brushless Digitally Controlled/Direct
- Max. Airflow Rate (CFM) 1,942 x 2
Notes:
- Acceptable operating voltage: 187V ‐ 253V.
- Piping lengths are equivalent.
- 180.4 ft. of Main Piping + 49.2 ft. of Branch Piping.
- 49.2 ft. of Main Piping + 131.2 of Branch Piping.
- At least one branch distribution (BD) unit is required for system operation; a maximum of two can be installed per ODU with the use of a Y‐branch accessory (PMBL5620).
- Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745.
- All power/communication cable to be minimum 14 AWG from the ODU to the BD unit, and 14 AWG from the BD unit to the IDU.
- All power/communication cable to be 4‐conductor, stranded, shielded or unshielded, and must comply with applicable local and national codes. If shielded, the wire must be grounded to the chassis at the ODU only.
- Power wiring size must comply with the applicable local and national codes.
- See the Engineering Manual Capacity Tables for ODU sensible and latent capacities.
- See the Engineering Manual Combination Tables for allocation of ODU rated capacity to each connected IDU when all are calling for full capacity. Allocation percentages should be applied to ODU capacity at design conditions.
- This data is rated 0 ft. above sea level, with 115 ft. of refrigerant line, and 0 ft. level difference between ODU and IDUs. All capacities are net with a combination ratio between 95 ‐ 105%.
- Must follow installation instructions in the applicable LG installation manual.
- See the Engineering Manual Capacity Tables for ODU capacity at design condi-tions.
- Installation of an optional Low Ambient Wind Baffle Kit will allow operation down to ‐4°F in cooling mode.
Unit: inch
Chassis code: U60A
Notes:
- Unit must be installed in compliance with the installation manual.
- Unit must be grounded in accordance with the local or state regulations and applicable national codes.
- All field-supplied electrical components and materials must comply with local, state, and national codes.
- Electrical characteristics must be considered for electrical work and design. The capacity of power cable and circuit breaker for the outdoor unit must follow local, state, national,and manufacturer requirements.
Symbols
DIAGRAM
Example: outdoor unit with eight (8) indoor units and two (2) branch
distribution units connected.
ODU: Outdoor Unit.
IDU: Indoor Unit.
BDU: Branch Distribution Unit(s).
A: Main Pipe.
B: Branch Pipe (Branch Distribution Unit[s] to Indoor Unit[s]).
Multi F MAX Outdoor Unit Refrigerant Piping System Limitations
Pipe Length
(ELF = Equivalent Length of pipe in Feet)
| Total piping length (ΣA + ΣB)| ≤475.7 feet
---|---|---
Main pipe (Outdoor Unit to Branch Distribution Units: A)| Minimum for
Each (A) Piping Segment| 16.4 feet
Maximum (ΣA)| ≤180.4 feet
Total branch piping length (ΣB)| ≤295.3 feet
Branch pipe (Branch Distribution Units to Indoor Units: B)| Minimum|
16.4 feet
Maximum| ≤49.2 feet
Elevation Differential (All Elevation Limitations are Measured in
Actual Feet)| If outdoor unit is above or below indoor unit (h1)|
≤98.4 feet
Between the farthest two indoor units (h2)| ≤49.2 feet
Between branch distribution unit and farthest connected indoor unit(s)
(h3)| ≤32.8 feet
Between branch distribution units (h4)| ≤49.2 feet
Installing the Unit
Multi F MAX Piping Sizes.
| Piping | Main Pipe A (inch) | Branch Pipe B |
|---|---|---|
| Liquid | Ø3/8 | Depends on the size of |
the indoor unit piping.
Vapor| Ø3/4
For continual product development, LG reserves the right to change
specifications without notice.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG
Life’s Good” is a registered trademark of LG Corp.
/www.lghvac.com
SB_MultiF_MAX_LMU481HV_2021_09_08_125816