Photo may vary slightly — verify by model number before ordering.LG ARUM121BTE5 Multi V 5 121,000 BTU Heat Recovery / Heat Pump Outdoor Unit
In stock and ordered before 1pm ET, Mon–Fri? It ships the same day from our US warehouse.
Not sure it's the right unit? Send the model and serial — help@totalhvacparts.com or 302-219-4994.
Need more than 4? Ask about factory lead time — we'll give you a real date, not a guess.
Overview
LG ARUM121BTE5 is a 121,000 Btu/h (10 ton) Multi V 5 variable refrigerant flow outdoor unit, configurable for heat recovery or heat pump operation, running on R-410A at 208-230V, 3-phase power.
From the LG submittal: 30.9 A MCA and 40 A MOP.
System design and installation
- Indoor units: any LG Multi V 5 indoor units at matching voltage. Total connected indoor capacity can run to roughly 120% of this unit's rated capacity — confirm against the combination data manual under Documentation.
- Heat recovery: pair with PRHR branch-distribution units for simultaneous heating and cooling.
- Electrical: 208-230V, 3-phase, 30.9 A MCA / 40 A MOP; disconnect and breaker field supplied.
- Refrigerant: R-410A — charged on site per the piping design in the engineering manual.
LG VRF equipment must be designed and commissioned by an LG-trained contractor; the VRF limited warranty document is linked under Documentation.
Compatible Units
LG approves ARUM121BTE5 only in the combinations below (per the LG engineering manual and submittal). Mixing it with any other outdoor or indoor unit is not an AHRI-rated match. Ask the parts desk if your existing equipment isn't listed.
- LG Multi V 5 indoor units at 208-230V
Specifications
Documentation
Companion Units & System Bundle
| Model | Description | Stock | ||
|---|---|---|---|---|
 |
ARNU053SJS4LG · Compatible indoor unit | ARNU053SJS4 Standard Wall-Mounted indoor unit | ✓ In stock | View |
 |
ARNU053TRD4LG · Compatible indoor unit | ARNU053TRD4 4-Way Ceiling Cassette (2′×2′) indoor unit | ✓ In stock | View |
 |
ARNU073BHA4LG · Compatible indoor unit | ARNU073BHA4 Ceiling-Concealed High-Static Ducted indoor unit | ✓ In stock | View |
 |
ARNU073CEA4LG · Compatible indoor unit | ARNU073CEA4 Floor-Standing indoor unit | ✓ In stock | View |
 |
ARNU073L1G4LG · Compatible indoor unit | ARNU073L1G4 Ceiling-Concealed Low-Static Ducted indoor unit | ✓ In stock | View |
 |
ARNU073M1A4LG · Compatible indoor unit | ARNU073M1A4 Ceiling-Concealed Convertible Mid-Static Ducted indoor unit | ✓ In stock | View |
 |
ARNU073MAA4LG · Compatible indoor unit | ARNU073MAA4 Ceiling-Concealed Convertible Mid-Static Ducted indoor unit | ✓ In stock | View |
 |
ARNU073SJS4LG · Compatible indoor unit | ARNU073SJS4 Standard Wall-Mounted indoor unit | ✓ In stock | View |
After You Order
Order number and confirmation by email the moment you check out.
Pulled from our shelf — the same live count you saw on this page. In-stock orders placed before 1pm ET, Mon–Fri, leave the same business day.
Tracking number lands in your inbox the moment it leaves the building.
Check the part number on the label against your order before installing. Wrong or damaged? Tell us — we'll sort it out.
Ask the Parts Desk
Not sure this fits? Need more than what's in stock? Send the model and serial from the unit's data plate — a real person reads it and confirms before you order.
Common Questions
What does the LG ARUM121BTE5 pair with?
LG rates ARUM121BTE5 only with LG Multi V 5 indoor units at 208-230V. Other combinations are not AHRI-matched and are not covered by the LG warranty.
What power does the ARUM121BTE5 need?
208-230V, 3-phase. Minimum circuit ampacity and maximum overcurrent protection are listed in the Specifications table above and on the LG submittal under Documentation; size the breaker and wire to those values and local code.
Is the submittal sheet and installation manual available for ARUM121BTE5?
Yes — the LG submittal data sheet, engineering manual, installation manual and warranty document are all linked under Documentation on this page and can be downloaded without an account.
Is the stock number on this page real?
Yes — it's the live count from our own shelf, not an availability estimate. If it says 4, that's how many are physically here. When it hits zero, this page says so.
Is this a genuine LG unit, or aftermarket?
Genuine LG OEM equipment — not an aftermarket substitute.
I see this listed under a different name on other sites. Is it the same part?
Yes — manufacturers and distributors sometimes use different brand names or legacy labels for the same part number. Part number ARUM121BTE5 is identical across all name variations.
What's the warranty on this part?
Warranty terms vary by manufacturer. Contact us with your order number for details specific to this part.
How fast does this ship?
In-stock items ship the same business day on orders placed before 1pm ET, Monday–Friday. Standard ground delivers to most of the continental US in 2–5 business days. This part ships by LTL freight, so transit runs on the freight schedule — we'll contact you to arrange delivery.
Does everything ship UPS or FedEx Ground?
This part ships by truck freight rather than parcel — still free, included in the price shown, and we'll contact you to schedule delivery before it ships.Most orders ship UPS or FedEx Ground. A small number of large or heavy parts across the catalog ship by truck freight instead — that's still free, and we reach out to arrange a delivery window before those orders leave the warehouse.
