Installation Guide
Tools Needed:
- Pipe wrench
- Gas leak detector solution
- Screwdrivers (flat and Phillips)
- Tape measure
- Level
- Pipe thread sealant
Step-by-Step Installation
- Choose Installation Location: Select a well-ventilated area with proper clearances from combustible materials and access to gas and water lines.
- Prepare the Area: Ensure the floor is level and can support the weight of the water heater when full.
- Gas Connection: Connect gas supply line using approved pipe thread sealant. Check for leaks with detector solution.
- Water Connections: Connect cold water inlet and hot water outlet using dielectric unions to prevent corrosion.
- Vent Installation: Install proper venting system according to local codes and manufacturer specifications.
- Pressure Relief Valve: Install temperature and pressure relief valve with discharge pipe directed to safe location.
- Electrical Connection: Connect to proper electrical outlet if unit has electronic ignition or digital display.
- Initial Startup: Fill tank with water, purge air from lines, light pilot (if applicable), and check operation.
Specifications
| Model Number | GU1500XTLS3 |
| Type | Gas Tank Water Heater |
| Fuel Type | Natural Gas |
| Tank Capacity | 50 Gallons |
| Recovery Rate | 40 gallons/hour |
| Energy Factor | 0.67 |
| BTU Input | 40,000 BTU/hr |
| First Hour Rating | 68 gallons |
| Vent Size | 3 inches |
| Dimensions (HxDiameter) | 60 x 22 inches |
| Weight (Empty/Full) | 150 lbs / 550 lbs |
| Warranty | 6 years limited |
Warranty Information
- Tank Warranty: 6 years limited
- Parts Warranty: 1 year limited
- Labor Warranty: 1 year limited
- Additional Coverage: Optional extended warranty available
For warranty service, contact Whirlpool Customer Service at 1-800-253-1301 or visit Whirlpool.com
Key Features
Advanced Burner System
High-efficiency burner design provides consistent heating performance while minimizing gas consumption and emissions.
Glass-Lined Tank
Durable glass-lined steel tank with advanced anode rod protection system resists corrosion and extends tank life.
Electronic Ignition
Energy-saving electronic ignition system eliminates standing pilot light, reducing gas consumption and improving efficiency.
Temperature Control
Easy-to-use temperature dial with clear settings allows for precise water temperature adjustment from 90°F to 150°F.
Safety Features
Comprehensive safety system includes flame arrestor, automatic gas shut-off, and over-temperature protection.
Energy Efficient
Meets ENERGY STAR® requirements with high energy factor rating, reducing operating costs and environmental impact.
Temperature Settings Guide
Vacation (Low)
Minimum setting for energy savings during extended absences
Warm (A)
Approximately 90°F - ideal for energy conservation
Hot (B)
Approximately 120°F - standard setting for most households
Very Hot (C)
Approximately 140°F - for increased hot water capacity
Maximum (D)
Approximately 150°F - commercial applications only
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water | Pilot light out, gas supply off, thermocouple issue | Relight pilot, check gas valve, replace thermocouple if needed |
| Insufficient hot water | Undersized unit, high demand, sediment buildup | Check unit size, reduce simultaneous use, flush tank |
| Water too hot | Temperature setting too high, thermostat malfunction | Adjust temperature setting, check/replace thermostat |
| Pilot won't stay lit | Dirty pilot, faulty thermocouple, gas pressure issue | Clean pilot orifice, replace thermocouple, check gas pressure |
| Discolored water | Corroded anode rod, sediment in tank | Replace anode rod, flush tank thoroughly |
| Rumbling noises | Sediment buildup at bottom of tank | Drain and flush tank to remove sediment |
Maintenance Schedule
- Monthly: Check temperature and pressure relief valve operation
- Every 6 Months: Inspect anode rod and flush a few gallons from tank
- Annually: Full tank flush and comprehensive inspection
- Every 3-5 Years: Replace anode rod (depending on water quality)
- As Needed: Clean burner assembly and check gas connections
Manual Downloads
Current Model Manuals
GU1500XTLS3
50 Gallon Gas Water Heater
GU1500XTLS2
50 Gallon Gas with Power Vent
GU1200XTLS3
40 Gallon Gas Water Heater
GU1800XTLS3
75 Gallon Gas Water Heater
Popular Previous Models
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