High Efficiency
Commercial Gas
Water Heaters
97% Thermal Efficiency
LonWorks® Compatible Intelligence
Highly Flexible and Ultra Quiet
Super Compact Design
Variable Frequency Drive Lets
You Change Output to Match Demand
Intelli-Fin is the first water heater to feature variable frequency drive. Variable frequency drive further increases the thermal efficiency by precisely supplying the proper amount of gas and air to the burner. Ensuring this balance yields complete combustion and therefore increased Btu/hr output. Just as the electronic fuel injection system in your car adapts to changes in atmosphere, the Intelli-Fin’s variable frequency drive allows the system to adjust. This means maximum efficiency,
no matter what the system load may be.
In addition to the tight control of the combustion system, variable frequency drive allows Intelli-Fin to adjust its output to meet demand, limiting excessive heat, thereby maximizing efficiency. Because the variable frequency drive controls fan motor speed in an infinitely proportional manner, Btu/hr output can be adjusted to match any heating demand. In fact, Intelli-Fin can reduce output from 100% down to 25% of rated capacity and efficiently provide heat at any fraction of the load in between.
This variable combustion process combined with Lochinvar's new temperature control, accurate to within 1°F, enables Intelli-Fin to track the domestic load precisely. By precisely tracking the load, hot water
output equals the facility domestic load. This means that your water heater can automatically provide the required amount of hot water for large dump loads and consistent draw applications, without wasting energy. With Intelli-Fin, it is now possible to tailor system output to meet demand, while significant energy is saved and short cycling is eliminated. That’s an intelligent new advantage for you.
Flexibility in Water and Gas Supplies
Intelli-Fin’s advanced burner technology operates within a broader range of inlet gas supply pressures. Intelli-Fin can operate with a minimum inlet gas pressure as low as 4 inches of water column. This advanced design prevents nuisance operational problems in areas of varying gas supply pressures. Unlike other high efficiency products, Intelli-Fin does not require high pressure gas service or additional gas pressure boosters.
The sophisticated heat transfer system of Intelli-Fin integrates dual heat transfer surfaces with a fully automatic pumped bypass. This innovative design provides increased installation flexibility within low return water temperature applications, allowing Intelli-Fin to operate with return water temperatures as low as 50°F. The fully automatic bypass controls the point where condensate occurs within Intelli-Fin. This innovative design increases the product flexibility, maximizes efficiency and eliminates worry.
Intelli-Fin® Precisely Tracks Domestic Water Demand and Adjusts Heat Output
100% |
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180˚F |
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752 USG |
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No Draw |
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Varing GPH Draw Rates |
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Tank |
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170˚F |
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90% |
Cold-Start |
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160˚F |
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80% |
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150˚F |
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70% |
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140˚F |
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Setpoint |
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130˚F |
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60% |
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120˚F |
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50% |
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2400 |
2100 |
1800 |
1500 |
450 |
288 |
110˚F |
2 |
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GPH |
GPH |
GPH GPH |
GPH |
GPH |
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40% |
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1200 GPH |
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100˚F |
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Inlet |
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90˚F |
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30% |
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80˚F |
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20% |
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70˚F |
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10% |
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26 min. |
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41 min. |
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37 min. |
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45 min. |
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60˚F |
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50˚F |
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0% |
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25 |
34 |
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50 |
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67 |
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93 |
101 |
109 |
118 |
126 |
135 |
143 |
151 |
40˚F |
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8 |
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Btu/hr |
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Temp. |
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Output |
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Time (minutes) |
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Inlet Temp |
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Setpoint |
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One key advantage of the Intelli-Fin’s variable frequency drive, is that it adjusts output capacity anywhere between 100% and 25% (yellow bar shows output capacity). In this chart, Intelli-Fin operates at full capacity during cold start to heat a 752-gallon tank from a 40-degree inlet water temperature up to the 130-degree set point, then reduces capacity as water temperature rises.
Once the tank is full and there is no demand on the system, Intelli-Fin shuts down.
A sudden 1200 GPH draw re-starts the unit, which quickly compensates and then begins modulating again to maintain the setpoint temperature.
Varied demand shows how the water heater continually adjusts to demand tracking the set point with precise Btu/hr output, maximizing efficiency.
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