Lochinvar Water Heater Manuals
Select your Lochinvar model number below for installation steps, settings, maintenance schedules, troubleshooting and the full specification sheet. Your model number is printed on the rating plate.
Lochinvar water heaters by model number
| Model | Description | Certified |
|---|---|---|
| CHPA-40 2 | 36-gallon heat pump water heater | August 2026 |
| CHPA-50 2 | 46-gallon heat pump water heater | August 2026 |
| CHPA-66 2 | 68-gallon heat pump water heater | August 2026 |
| CHPA-80 2 | 81-gallon heat pump water heater | August 2026 |
| HPA052KD 1 | 46-gallon heat pump water heater | February 2023 |
| HPA068KD 1 | 67-gallon heat pump water heater | February 2023 |
| HPA082KD 1 | 82-gallon heat pump water heater | February 2023 |
| HPPA040KD 2 | 36-gallon heat pump water heater | December 2025 |
| HPPA050KD 2 | 46-gallon heat pump water heater | December 2025 |
| HPPA065KD 2 | 68-gallon heat pump water heater | December 2025 |
| HPPA080KD 2 | 81-gallon heat pump water heater | December 2025 |
| HPSA050KD 2 | 46-gallon heat pump water heater | December 2025 |
| HPSA065KD 2 | 67-gallon heat pump water heater | December 2025 |
| HPSA080KD 2 | 82-gallon heat pump water heater | December 2025 |
| HPV050KD 2 | 46-gallon 120-volt heat pump water heater | December 2025 |
| HPV065KD 2 | 68-gallon 120-volt heat pump water heater | December 2025 |
| HPV080KD 2 | 82-gallon 120-volt heat pump water heater | December 2025 |
| LCT-199O-N 1T-H3-OS-N 1** | 199,000 Btu/h natural gas tankless water heater | February 2023 |
| LCT-199O-P 1*1T-H3-OS-N 1** | 199,000 Btu/h propane tankless water heater | February 2023 |
| LCTH-199M-(N,P) 1 | 199,000 Btu/h gas tankless water heater | July 2026 |
| LHPCO-45 1**+LXST-50LBTTP 1 | 48-gallon split-system heat pump water heater | February 2026 |
| LHPCO-45 1**+LXST-50S 1 | 46-gallon split-system heat pump water heater | February 2026 |
| LHPCO-45 1**+LXST-50STTP 1 | 46-gallon split-system heat pump water heater | February 2026 |
| LHPCO-45 1**+LXST-50T 1 | 45-gallon split-system heat pump water heater | February 2026 |
| LHPCO-45 1**+LXST-50TTTP 1 | 45-gallon split-system heat pump water heater | February 2026 |
| LHPCO-45 1**+LXST-66 1 | 60-gallon split-system heat pump water heater | February 2026 |
| LHPCO-45 1**+LXST-66TTP 1 | 60-gallon split-system heat pump water heater | February 2026 |
| LHPCO-45 1**+LXST-80 1 | 73-gallon split-system heat pump water heater | February 2026 |
| LHPCO-45 1**+LXST-80TTP 1 | 73-gallon split-system heat pump water heater | February 2026 |
| LHPCT-40L 1 | 38-gallon gas storage water heater | December 2025 |
| LHPCX-50L 1 | 49-gallon gas storage water heater | December 2025 |
| LTHR-160M 1ATHR-160M 1** | 160,000 Btu/h gas tankless water heater | December 2023 |
| LTHR-160X3 1ATHR-160M 1** | 160,000 Btu/h gas tankless water heater | December 2023 |
| LTHR-180M 1ATHR-180M 1** | 180,000 Btu/h gas tankless water heater | December 2023 |
| LTHR-180X3 1ATHR-180M 1** | 180,000 Btu/h gas tankless water heater | December 2023 |
| LTHR-199M 1ATHR-199M 1** | 199,000 Btu/h gas tankless water heater | December 2023 |
| LTHR-199X3 1ATHR-199M 1** | 199,000 Btu/h gas tankless water heater | December 2023 |
| LTI-340H-N 1T-H3S-DV-N | 180,000 Btu/h natural gas tankless water heater | February 2023 |
| LTI-340H-P 1*1T-H3S-DV-N | 180,000 Btu/h propane tankless water heater | February 2023 |
| LTI-340X3-N 1T-H3S-DV-N | 180,000 Btu/h natural gas tankless water heater | February 2023 |
| LTI-340X3-P 1*1T-H3S-DV-N | 180,000 Btu/h propane tankless water heater | February 2023 |
| LTM-140M-N 1ATM-140M-N 1** | 140,000 Btu/h natural gas tankless water heater | July 2026 |
| LTM-140X3-N 1ATM-140M-N 1** | 140,000 Btu/h natural gas tankless water heater | July 2026 |
| LTM-160M-N 1ATM-160M-N 1** | 160,000 Btu/h natural gas tankless water heater | April 2025 |
| LTM-160M-P 1*1 | 160,000 Btu/h propane tankless water heater | July 2026 |
| LTM-160X3-N 1ATM-160M-N 1** | 160,000 Btu/h natural gas tankless water heater | April 2025 |
| LTM-160X3-P 1*1 | 160,000 Btu/h propane tankless water heater | July 2026 |
| LTM-180M-N 1ATM-180M-N 1** | 180,000 Btu/h natural gas tankless water heater | April 2025 |