Lochinvar Tankless X3 Condensing High Efficiency Water Heaters
TANKLESS X3 CONDENSING HIGH EFFICIENCY WATER HEATERS
Ultra-Low NOx, condensing tankless water heaters featuring X3 Scale Prevention Technology will last three times longer than competitive models.
FEATURES:
- X3 SCALE PREVENTION TECHNOLOGY (PATENT PENDING)
- No annual descaling required
- No scale buildup means the heater maintains like-new performance longer
- ENERGY STAR® QUALIFIED
- DURABLE HEAT EXCHANGER
- Primary heat exchanger is constructed of a commercial-grade copper that is more resilient to corrosion. Copper is 25X better at heat transfer than stainless steel, thus stabilizing outgoing water temperatures quicker.
- Secondary heat exchanger is made of 316L stainless steel to protect against corrosion
- QUALIFIED AS LEAD FREE UNDER THE SAFE DRINKING WATER ACT
- SAFETY FEATURES:
- Exhaust & Water Temperature Safety Control
- Overheat Cut-Off Fuse
- Air-Fuel Ratio (AFR) Sensor
- INTERNAL FREEZE PROTECTION SYSTEM
- RECIRC CAPABLE
- Tankless water heaters with X3 Technology are approved to work with an external recirculation pump and cross-over valve. See manual for full details
POWER DIRECT VENT DESIGN
- Category III or IV venting can be used
- Exhaust, 3" PVC pipe up to 70'; 4" PVC up to 100'
- Provides flexible venting with PVC, CPVC, polypropylene, or ABS pipe for intake and exhaust (solid core only).
ACCESSORIES
- Pipe Cover
- Neutralizer Kit
- X3 Freeze Protection Kit
- Recess Box
- Concentric Vent Kit
WARRANTY
- No hard water exclusions
- 15-year limited warranty on heat exchanger in residential applications
- 5-year limited warranty on all parts in residential applications
- 1-year limited warranty on heat exchanger and parts in commercial applications
- For complete information, consult written warranty
MODEL SPECIFICATIONS
| Model Number | Type* | Gas Consumption Input (BTU/H) | Supply Gas Pressure (in. W.C.) | UEF | GPM* | Hot/Cold Conn (NPT) | Gas Conn (NPT) | Dimensions in Inches (Height x Width x Depth) | Unit Weight (lbs) |
|---|---|---|---|---|---|---|---|---|---|
| Indoor Models | |||||||||
| LTI-240X3-N | Natural | 15,000 - 160,000 | 4.0 - 10.5 | 0.94 | 6.6 | 3/4" | 3/4" | 23-5/8" x 17-3/4" x 11-1/4" | 72 |
| LTI-240X3-P | Propane | 13,000 - 160,000 | 8.0 - 14.0 | 0.94 | 6.6 | 3/4" | 3/4" | 23-5/8" x 17-3/4" x 11-1/4" | 72 |
| LTI-340X3-N | Natural | 15,000 - 180,000 | 4.0 - 10.5 | 0.95 | 8 | 3/4" | 3/4" | 23-5/8" x 17-3/4" x 11-1/4" | 72 |
| LTI-340X3-P | Propane | 13,000 - 180,000 | 8.0 - 14.0 | 0.95 | 8 | 3/4" | 3/4" | 23-5/8" x 17-3/4" x 11-1/4" | 72 |
| LTI-540X3-N | Natural | 15,000 - 199,000 | 4.0 - 10.5 | 0.93 | 10 | 3/4" | 3/4" | 23-5/8" x 17-3/4" x 11-1/4" | 73 |
| LTI-540X3-P | Propane | 13,000 - 199,000 | 8.0 - 14.0 | 0.93 | 10 | 3/4" | 3/4" | 23-5/8" x 17-3/4" x 11-1/4" | 73 |
| Outdoor Models | |||||||||
| LTO-240X3-N | Natural | 15,000 - 160,000 | 4.0 - 10.5 | 0.95 | 6.6 | 3/4" | 3/4" | 23-5/8" x 17-3/4" x 11-1/4" | 71 |
| LTO-240X3-P | Propane | 13,000 - 160,000 | 8.0 - 14.0 | 0.95 | 6.6 | 3/4" | 3/4" | 23-5/8" x 17-3/4" x 11-1/4" | 71 |
| LTO-340X3-N | Natural | 15,000 - 180,000 | 4.0 - 10.5 | 0.94 | 8 | 3/4" | 3/4" | 23-5/8" x 17-3/4" x 11-1/4" | 71 |
| LTO-340X3-P | Propane | 13,000 - 180,000 | 8.0 - 14.0 | 0.94 | 8 | 3/4" | 3/4" | 23-5/8" x 17-3/4" x 11-1/4" | 71 |
| LTO-540X3-N | Natural | 15,000 - 199,000 | 4.0 - 10.5 | 0.95 | 10 | 3/4" | 3/4" | 23-5/8" x 17-3/4" x 11-1/4" | 73 |
| LTO-540X3-P | Propane | 13,000 - 199,000 | 8.0 - 14.0 | 0.95 | 10 | 3/4" | 3/4" | 23-5/8" x 17-3/4" x 11-1/4" | 73 |
*Note: 15-150 PSI water pressure. 40 PSI or above is recommended for maximum flow. Current numbers based on factory testing; 0.5 GPM required for activation; 0.4 GPM required for continuous fire after initial ignition. Maximum certified or allowable installed altitude is 10,100 feet for indoor installations and 6,000 for outdoor installations.
PERFORMANCE CHARTS
240X3 Output Temp Vs. GPM
A line graph showing the relationship between Temperature Rise (°F) on the x-axis and Flow Rate (gpm) on the y-axis. The graph displays two lines: one for a set temperature of 100-125°F and another for 130-160°F.
240X3 Pressure Loss
A line graph showing the relationship between Flow Rate (gpm) on the x-axis and Pressure (psi) and Head (ft) on the y-axis. The graph displays two lines for pressure and two lines for head.
340X3 Output Temp Vs. GPM
A line graph showing the relationship between Temperature Rise (°F) on the x-axis and Flow Rate (gpm) on the y-axis. The graph displays two lines: one for a set temperature of 100-125°F and another for 130-160°F.
340X3 Pressure Loss
A line graph showing the relationship between Flow Rate (gpm) on the x-axis and Pressure (psi) and Head (ft) on the y-axis. The graph displays two lines for pressure and two lines for head.
540X3 Output Temp Vs. GPM
A line graph showing the relationship between Temperature Rise (°F) on the x-axis and Flow Rate (gpm) on the y-axis. The graph displays two lines: one for a set temperature of 100-125°F and another for 130-160°F. A note indicates that the max flow is 8 gpm when the set temperature is above 125°F.
540X3 Pressure Loss
A line graph showing the relationship between Flow Rate (gpm) on the x-axis and Pressure (psi) and Head (ft) on the y-axis. The graph displays two lines for pressure and two lines for head.
INDOOR DIMENSIONS
Diagrams illustrating the front, side, top, and bottom views of the indoor models, with detailed measurements for various ports (drain, gas, hot water, cold water, condensate drain), X3 cartridge, and electrical connections (120 VAC).
OUTDOOR DIMENSIONS
Diagrams illustrating the front, side, top, and bottom views of the outdoor models, with detailed measurements for various ports (drain, gas, hot water, cold water, condensate drain), X3 cartridge, and electrical connections (120 VAC).
SUGGESTED SPECIFICATION
The fully modulating, on-demand, condensing gas fired tankless water heater(s) shall be Lochinvar Tankless Water Heater model LTI-240X3, LTI-340X3, LTI-540X3 or LTO-240X3, LTO-340X3, LTIO540X3 having a maximum input rating of 199,000 Btu/h and available in NG or LP. The heater shall have 3/4 in. male NPT water and gas connections. The inlet gas supply pressures shall be 4.0 in. WC (min.) up to 10.5 in. WC (max.) for NG and 8.0 in. WC (min.) up to 14 in. WC (max.) for LP. The water heater shall have the integrated X3 Scale Prevention Technology to prevent scaling of the heat exchangers. The indoor heater(s) shall incorporate an integrated temperature controller that will provide diagnostic information, fault history, and heater set temperature. The outdoor heater shall be factory supplied with a temperature remote, 100209924, that can be installed up to 400 ft. from the heater using 20 gauge (minimum) control wire. The temperature remote shall provide diagnostic information, fault history, and heater set temperature. The heater shall operate using 120 V / 60 Hz power source. The indoor heater will incorporate a factory installed power cord.
The indoor heater shall be vented with 3” or 4” diameter schedule 40 PVC (solid core), CPVC, ABS, polypropylene or category IV vent pipe with a length not to exceed 70 ft. (equivalent) for 3" vent or 100 ft. (equivalent) for 4” vent, terminating horizontally or vertically. The intake pipe may use material such as PVC, CPVC, ABS, aluminum, or Category IV pipe and cannot exceed 70 ft. (equivalent) for 3" vent or 100 ft. (equivalent) for 4" vent.
The water heater shall use a commercial grade copper alloy, fin tube primary heat exchanger with quick release brass or bronze waterways. The secondary heat exchanger shall be constructed from stainless steel 316L. The heater shall be controlled by an onboard solid-state printed circuit board which uses the following factory installed components: thermistors to monitor inlet & outlet water temperature and exhaust temperature; a flow sensor to measure flow rate; a flame sensor to monitor combustion; an air-fuel ratio rod to measure and adjust operation in order to maintain optimal combustion efficiency. The heater also consists of inline fusing and surge absorbers for electrical surge protection, an electronic spark igniter, aluminized stainless steel burners, hi-limit temperature switches to monitor water and exhaust temperatures, modulating gas valve, an overheat cutoff fuse, ceramic heating blocks to protect the heat exchanger and water piping.
The indoor heater shall incorporate auto-fire system for additional freeze protection. The indoor model shall include an exhaust temperature monitoring system using an exhaust thermistor and automatic hi-limit switch to maintain safe exhaust temperatures for sch. 40 PVC. The heater shall have a built-in condensate trap for the secondary heat exchanger. The heater shall incorporate a condensate drain blockage detector to provide safe operations and prevent overflow.
The heater shall be design certified by CSA according to CSA/ANSI Z21.10.3•CSA 4.3, approved for sale in the United States, ENERGY STAR® qualified, has a minimum Uniform Energy Factor of 0.93, meets the energy efficiency requirements of the U. S. Department of Energy and ASHRAE 90.1, complies with SCAQMD Rule 1146.2 and other air quality districts with similar requirements for low NOx emissions of 14 ng/J or 20 ppm.
Lochinvar, LLC
300 Maddox Simpson Parkway
Lebanon, Tennessee 37090
P: 615.889.8900 / F: 615.547.1000
Lochinvar.com
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