XCALIBUR LTHR-160X3 Residential Tankless Water Heater Instruction Manual
- June 24, 2024
- XCALIBUR
Table of Contents
XCALIBUR LTHR-160X3 Residential Tankless Water Heater
Product Information
Specifications
- Product: Residential Tankless Water Heater
- Brand: Lochinvar XCalibur
- Models: LTHR – 160X3, LTHR – 180X3, LTHR – 199X3
- Heat Exchanger Material: Stainless Steel
- Flow Rate: 10.5 GPM
- Activation Flow Rate: 0.4 GPM
- Continuous Fire Flow Rate: 0.26 GPM
- Elevation Certification: Sea Level to 10,100 ft
- Sound Level: 50.3 dB
- Power Supply: 120V, 50Hz/60Hz
- Fuel Options: Natural Gas (Convertible to Liquid Propane)
Product Usage Instructions
Installation
- Select an appropriate location for installation, ensuring proper ventilation and access to gas and water lines.
- Follow the provided installation manual for indoor or outdoor installation based on your preference.
- Connect the unit to the power supply and gas line as per the manufacturer’s instructions.
Maintenance
- Regularly inspect the unit for any signs of wear, corrosion, or leaks.
- Follow the maintenance schedule provided in the user manual for descaling and cleaning procedures.
Operation
- Set the desired temperature using the built-in Control Display.
- Monitor the unit for error codes or status indicators displayed on the Control Display.
Frequently Asked Questions (FAQ)
-
Q: How often should I descale the water heater?
A: With X3 Scale Prevention Technology, no annual descaling is required. However, regular maintenance checks are recommended. -
Q: Can I convert the unit from Natural Gas to Liquid Propane?
A: Yes, the unit is field convertible from Natural Gas to Liquid Propane. The conversion kit is included with the product.
Introducing Lochinvar’s XCalibur premium condensing gas tankless water heaters, delivering robust, on-demand performance and the flexibility to install in practically any residential setting.
FEATURES
- X3® SCALE PREVENTION TECHNOLOGY (PATENT PENDING)
- HEAVY-DUTY STAINLESS-STEEL HEAT EXCHANGER DESIGN
- INTEGRATED RECIRCULATION PUMP & DISPLAY
- ULTIMATE FLEXIBILITY – EASE OF INSTALLATION & SERVICEABILITY
- DIRECT VENT DESIGN
- 2” PVC up to 75’
- 3” PVC up to 150’
- PERFORMANCE & EFFICIENCY
- 160,000, 180,000, 199,000 BTU/HR
- 9,000 BTU MIN. INPUT
- 22:1 TURNDOWN RATIO (199K CONFIGURATIONS)
- 0.95 UEF (ENERGY STAR® CERTIFIED)
X3 SCALE PREVENTION TECHNOLOGY (PATENT PENDING)
- Integrated into all X3 models; optional accessory for Bypass Manifold (M) models and can be added at any time
- No annual descaling is required with X3
- No scale buildup means the heater maintains like-new performance for longer
- Extends life up to three times versus unprotected unit
HEAVY DUTY STAINLESS-STEEL HEAT EXCHANGER DESIGN (Patented)
- Single stainless steel, heavy-duty heat exchanger design eliminates most internal welds and improves overall efficiency
- More resilient to scale buildup and corrosion
INTEGRATED RECIRCULATION PUMP & DISPLAY
Integrated recirculation pump
- Built-in Control Display to set and review recirc schedules, status, and error codes
- Optional remote activation (CA Title 24) kits available
PERFORMANCE & EFFICIENCY
- Max flow rate 10.5 GPM, 0.4 GPM activation; 0.26 GPM for continuous fire
- Ultra-Low NOx emissions – Complies with SCAQMD Rule 1146.2*
- Elevation: Certified from Sea Level to 10,100 ft.
- Sound Level: 50.3 dB (Based on factory settings)
ULTIMATE FLEXIBILITY – EASE OF INSTALLATION & SERVICEABILITY
- Universal indoor or outdoor installation; Outdoor Vent Cap Kit sold separately
- Field convertible from Natural Gas to Liquid Propane, kit included
- The wall-mount design saves valuable space; the hanging bracket and hardware include ½” Gas Line or larger
- Flip Down the Hinged Control Board for easy access
- Pressure Relief Valve included with X3 models
- Outdoor-rated power cord standard on every unit
- Cascade up to 12 units with a single cable per heater, cable included
- Temperature setting: 100°F to 140; Factory default 120°F
- Approved for installation in manufactured homes
- Electronic Ignition System
- Internal freeze protection system to -5°F +
- Power Supply: 120V, 50Hz/60Hz, <5a
DIRECT VENT DESIGN
- Exhaust venting, 2” PVC up to 75’; 3” PVC up to 150’
- Cat. IV venting may be used
- Flexible venting with PVC, CPVC, Polypropylene, or ABS Pipe (solid core only)
WARRANTY
No hard water exclusions on X3 models; exclusions apply to M models
- 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
THE FLOW RATE CAPACITY
PUMP PERFORMANCE
PRESSURE LOSS
- Internal freeze protection for heater only; both Bypass cartridge and X3 cartridge require anti-freeze kits sold separately.
- Ultra Low NOx – Complies with SCAQMD Rule 1146.2 and other air quality management districts with similar NG NOx emission requirements of 14ng/J or 20 ppm. Complies with SJVAPCD Rule 4308 and other air quality management districts with similar LP NOx emission requirements of 77ppm.
ACCESSORIES
Item
| |
Description
---|---|---
X3 Cartridge 100368986| | Add to an M-model heater to prevent scale buildup
and eliminate the need for annual descaling maintenance.
Wi-Fi Module Kit 100371922| | Wi-Fi Module for electronically connecting
tankless water heaters to the internet and adapter to connect to the water
heater.
• Module (1x)
• Cable (1x)
• Adapter (1x)
Remote Temperature Controller 100371898| | Remote Temperature Controller with
10’ (3 m) cable.
Communication Cable – 10’ (3 m) 100371889
Communication Cable – 32’ (10 m) 100371900
| | Replacement Communication Cable for Remote Temperature Controller WIFI Module, or On-Demand Receiver, 10’ (3 m).
Extended Communication Cable for Remote Temperature Controller WIFI Module, or On-Demand Receiver, 32’ (10 m).
Remote Recirculation Kit –
Two Buttons
100371920
| | Remote Recirculation Kit engages the heater and recirculation at the touch
of a button for on-demand hot water. Kit contains: Receiver (1x), Buttons (x2)
Remote Recirculation Kit –
Three Buttons
100371921
| | Remote Recirculation Kit engages heater and recirculation at the touch of
a button for on-demand hot water. Kit contains: Receiver (1x), Buttons (x3)
Individual Spare Button
100371913| | Add more Remote Recirculation Buttons to a system as needed.
Add up to a maximum of 30 buttons.
X3 Freeze Protection (X3 Models) 100325654| | X3 Cartridge Freeze Protection
can add an extra layer of freeze protection to the external SCM cartridge. The
cartridge is not protected by the heater’s internal freeze protection.
Bypass Freeze Protection (M Models)
100371918| | Bypass Freeze Protection can add an extra layer of freeze
protection to external Bypass cartridges. The cartridge is not protected by
the heater’s internal freeze protection.
Pipe Cover 100374697| | Pipe Cover protects plumbing connections to the heater
while improving the appearance of the installation.
Affixes to the bottom of the heater.
Neutralizer Assembly Kit
100112159| | The Neutralizer Assembly neutralizes the condensate (acidic
water) that forms in the heat exchanger of the water heater. It connects to
the condensate drain port of the water heater by using connectors included
with the neutralizer kit.
Oudoor Vent Cap Kit
100369060| 
| Vent cap kit and accessories
for installing the tankless heater outdoors. Kit contains:
• Vent Cap (1x)
• User Interface Overlay (1x)
Isolation Value Kit with Pressure Relief Valve 100112156| | The Isolation
Valve supports routine maintenance and allows for draining and flushing the
heater; whereas, the Pressure Relief Valve, as the name implies, serves to
limit internal pressure in the system. Not necessary for X3 models. Check
local codes for applicability.
Cross Over Valve Kit
100327167| 
| For plumbing systems without a
dedicated return line necessary for recirculation system functionality.
Install at the faucet furthest from the water heater.
DIMENSIONS AND SPECIFICATIONS
XCALIBUR| PREMIUM| ONDENSING| GAS TANKLESS| | | | | DIMENSIONS AND Supply Gas Pressure (NG)| SPECIFICATIONS
Supply Gas Pressure (LP)
| | | | | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---
Model Number*
| X3 Scale
Prevention Technology
| Gas Con.
Input Min. BTU/HR
| Gas Con.
Input Max. BTU/HR
|
Max. GPM**
|
Activation GPM
| Continuous
Fire GPM
| Water
Pressure PSI Min-Max^
| Min. in
W.C. (kPa)
| Max in
W.C. (kPa) W
| Min. in
.C. (kPa)
| Max in
W.C. (kPa)
| Hot/
Cold Conn.
|
Gas Conn.
|
__Shipping Dimensions**** H W D
| Ship
Weight (lbs.)
LTHR-160M| Optional| 9000| 160,000| 10.5| 0.4| 0.26| 15-150| 3.5 (0.9)| 10.5
(2.6)| 8.0 (2)| 13.0 (3.2)| 3/4” NPT| 1/2” NPT| 20-3/4”| 22-1/4”| 40”| 125
LTHR-160X3| Integrated| 9000| 160,000| 10.5| 0.4| 0.26| 15-150| 3.5 (0.9)|
10.5 (2.6)| 8.0 (2)| 13.0 (3.2)| 3/4” NPT| 1/2” NPT| 20-3/4”| 22-1/4”| 40”|
125
LTHR-180M| Optional| 9000| 180,000| 10.5| 0.4| 0.26| 15-150| 3.5 (0.9)| 10.5
(2.6)| 8.0 (2)| 13.0 (3.2)| 3/4” NPT| 1/2” NPT| 20-3/4”| 22-1/4”| 40”| 125
LTHR-180X3| Integrated| 9000| 180,000| 10.5| 0.4| 0.26| 15-150| 3.5 (0.9)|
10.5 (2.6)| 8.0 (2)| 13.0 (3.2)| 3/4” NPT| 1/2” NPT| 20-3/4”| 22-1/4”| 40”|
125
LTHR-199M| Optional| 9000| 199,000| 10.5| 0.4| 0.26| 15-150| 3.5 (0.9)| 10.5
(2.6)| 8.0 (2)| 13.0 (3.2)| 3/4” NPT| 1/2” NPT| 20-3/4”| 22-1/4”| 40”| 125
LTHR-199X3| Integrated| 9000| 199,000| 10.5| 0.4| 0.26| 15-150| 3.5 (0.9)|
10.5 (2.6)| 8.0 (2)| 13.0 (3.2)| 3/4” NPT| 1/2” NPT| 20-3/4”| 22-1/4”| 40”|
125
Model Number*|
A***
|
B
|
C
| |
D
|
E
|
F
|
G
|
H
| |
I
|
J
|
K
| |
L
|
M
|
LTHR-160M| 33-3/4”| 26-3/4”| 2-3/4”| | 16-1/2”| 16”| 7”| 3-1/4”| 5”| |
8-1/4”| 9”| 6-3/4”| 3”| 4-3/4”
LTHR-160X3| 44-1/2”| 26-3/4”| 2-3/4”| | 16-1/2”| 16”| 7”| 3-1/4”| 5”| |
8-1/4”| 9”| 6-3/4”| 3”| 4-3/4”
LTHR-180M| 33-3/4”| 26-3/4”| 2-3/4”| | 16-1/2”| 16”| 7”| 3-1/4”| 5”| |
8-1/4”| 9”| 6-3/4”| 3”| 4-3/4”
LTHR-180X3| 44-1/2”| 26-3/4”| 2-3/4”| | 16-1/2”| 16”| 7”| 3-1/4”| 5”| |
8-1/4”| 9”| 6-3/4”| 3”| 4-3/4”
LTHR-199M| 33-3/4”| 26-3/4”| 2-3/4”| | 16-1/2”| 16”| 7”| 3-1/4”| 5”| |
8-1/4”| 9”| 6-3/4”| 3”| 4-3/4”
LTHR-199X3| 44-1/2”| 26-3/4”| 2-3/4”| | 16-1/2”| 16”| 7”| 3-1/4”| 5”| |
8-1/4”| 9”| 6-3/4”| 3”| 4-3/4”
All models are Energy Star® qualified.
- Universal install; outdoor installation requires outdoor vent cap kit (Part No. 100369060) sold separately; ** Current numbers based on factory settings; *Height from flue collar to bottom of cartridge or manifold; M models with Bypass Manifold cartridge, X3 models with Scale Control Media cartridge. **Packaged and shipped on unit back.
- 40 PSI Recommended for Maximum Flow
Included with Heater: Manual, Pressure Relief Valve (X3 models only), Wall Mounting Bracket and Hardware, Vent Port Screws, Cascading Cable, Fuel Conversion Kit, Bird Screens
For technical information call 800-722-2101. Lochinvar, LLC reserves the right to make product changes or improvements without prior notice.
Contact Information
-
Lochinvar, LLC
300 Maddox Simpson Parkway Lebanon, Tennessee 37090 -
P: 615.889.8900
-
F: 615.547.1000
References
- Hot Water Solutions Since 1939 | Lochinvar | Lochinvar
- Gas & Electric Water Heaters & Tankless Models | A. O. Smith