COMMERCIAL GAS MODELS LIGHT DUTY TTW® Light Duty TTW® (Through-the-Wall) units are perfect for applications where installation flexibility is as important as meeting hot water demands. Power vented for positive exhaust, these units can be vented horizontally and vertically up to 180 feet. These extremely long vent lengths solve difficult ventilation challenges. Light Duty TTW® models are also available in Ultra Low NOx versions.
APPLICATIONS: Small commercial kitchens and strip malls
FEATURES: full descriptions are available in glossary beginning on page 33
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ICON System™ Control
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¾” NPT Dielectric Waterway Fittings
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ICON System Accessory Package Compatible
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Factory Installed Heat Traps
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Max Temp - 180˚F
OnGuard RMT™ System Compatible– Accessory Module Required
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NSF Construction Available
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Side Connections
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Defender Safety System® (50 and 65gallon models only)
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Protective Magnesium Anode Rod
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Low Restriction Brass Drain Valve
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Electronic Ignition
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T&P Relief Valve Installed
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Powerful and Quiet Blower Motor
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2" Non-CFC Foam Insulation
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Horizontal and Vertical Venting
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Hydrojet®2 Total Performance System (TW4-75S has Hydrojet® Total Performance System)
3–Year Limited Tank Warranty– can be upgraded to 5–Year at additional cost
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Vitraglas® Lining
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Model Number
Capacity U.S. Gal.
TW4-50S-67FB-3N TW4-65S-70FB-3N TW4-75S-76B-3N
Recovery at 100°F Rise* Nat. LP Nat. LP U.S. U.S. BTU/Hr. BTU/Hr. GPH GPH
48 65 75
Input
67,000 60,000 70,000 63,000 76,000 75,500
65 68 74
58 61 73
Floor to Jacket Vent Vent Dia. Size Min. Conn. in.
in.
in.
lbs.
657/8 69 683/8
22 24 26
3 3 3
188 222 257
These models are not recommended for sanitation purposes. For Propane (LP) models change suffix "B" to "S" and "N" to "X” (Example: TW4-50S-67FS-3X) *Based on manufacturers rated recovery efficiency.
Venting Dimensions TW4-50S-67 TW4-65S-70 TW4-75S-76 Max. Equivalent Length Min. Equivalent Length Number 1 of 2 90° Elbows 3
3" Vent Pipe
4" Vent Pipe
†60 ft.** 7 ft. 55 ft. 50 ft. 45 ft.
†180 ft. 15 ft. 175 ft. 170 ft. 165 ft.
Subtract 5ft. for each additional 90° elbow †For high altitude installations, consult the installation instructions. **TW4-75S Max. 3" vent length is 50ft.
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Approx. Shipping Weight
QUESTIONS? SPEAK WITH OUR EXPERTS AT 800.523.2931