Lochinvar Water Heater Manuals — page 2
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 |
|---|---|---|
| LTM-180M-P 1*1 | 160,000 Btu/h propane tankless water heater | May 2026 |
| LTM-180X3-N 1ATM-180M-N 1** | 180,000 Btu/h natural gas tankless water heater | April 2025 |
| LTM-180X3-P 1*1 | 160,000 Btu/h propane tankless water heater | May 2026 |
| LTM-199M-N 1ATM-199M-N 1** | 199,000 Btu/h natural gas tankless water heater | April 2025 |
| LTM-199M-P 1*1 | 160,000 Btu/h propane tankless water heater | May 2026 |
| LTM-199X3-N 1ATM-199M-N 1** | 199,000 Btu/h natural gas tankless water heater | April 2025 |
| LTM-199X3-P 1*1 | 160,000 Btu/h propane tankless water heater | May 2026 |
| LTO-240H-N 1T-H3J-OS-N | 160,000 Btu/h natural gas tankless water heater | February 2023 |
| LTO-240H-P 1*1T-H3J-OS-N | 160,000 Btu/h propane tankless water heater | February 2023 |
| LTO-240X3-N 1T-H3J-OS-N | 160,000 Btu/h natural gas tankless water heater | February 2023 |
| LTO-240X3-P 1*1T-H3J-OS-N | 160,000 Btu/h propane tankless water heater | February 2023 |
| LTO-540H-N 1T-H3-OS-N 1** | 199,000 Btu/h natural gas tankless water heater | February 2023 |
| LTO-540H-P 1*1T-H3-OS-N 1** | 199,000 Btu/h propane tankless water heater | February 2023 |
| LTO-540HX3-N 1T-H3-OS-N 1** | 199,000 Btu/h natural gas tankless water heater | February 2023 |
| LTO-540HX3-P 1*1T-H3-OS-N 1** | 199,000 Btu/h propane tankless water heater | February 2023 |
| LTO-540P-N 1T-H3-OS-N 1** | 199,000 Btu/h natural gas tankless water heater | February 2023 |
| LTO-540P-P 1*1T-H3-OS-N 1** | 199,000 Btu/h propane tankless water heater | February 2023 |