DHT Techtanium TT-40 - Performance Ratings;Specs; Product Selection

II P
II P
RODUCT SELECTION/
RODUCT SELECTION/
PERFORMANCE
PERFORMANCE
1. The following guidelines apply to residential systems only. For commercial or institutional installations contact the
factory directly for assistance.
2. Determine the quantity of domestic hot water required. Factors to consider:
a. Estimate typical peak hour demand.
a. Estimate typical peak hour demand.
Determine the general time of day (morning, noon, evening) when the
most hot water is used. Use chart below to determine potential maximum usage.
Estimate of Peak Domestic Hot Water Usage
Estimate of Peak Domestic Hot Water Usage
Average Gallons of
Use Hot Water per Usage
Times Used During
One Hour
Total Peak Hour Demand =
Shower 20
Bath 20
Shaving 2
Hands and Face Washing 4
Hair Shampoo 4
Hand Dish Washing 4
Automatic Dish Washing 14
Food Preparation 5
Wringer Clothes Washer 26
Automatic Clothes Washer 32
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Times Used During
One Hour
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b. Estimate unusual peak draw demand.
b. Estimate unusual peak draw demand.
Whirlpool baths, hot tubs, and mutltiple head showers require large
quantities of hot water in a short period of time. Contact fixture manufacturer for quantity of water required.
Generally speaking, these circumstances can only be met with larger storage volumes.
c. Domestic Water Temperature.
c. Domestic Water Temperature.
Most residential usage will be satisfied with 119ºF water, the temperature
setting recommended by the Consumer Product Safety Commission. Some applications such as laundry and
dishwashers may require a higher temperature.
Ratings can be improved by increasing Techtanium thermostat setting and using a mixing valve to temper the
hot water to the proper temperature. When temperatures greater than 119ºF are required, use a mixing valve at
the outlet of the water heater or anti-scald fittings at point of use.
PERFORMANCE RATINGS
CAPACITY (Gallons)
CAPACITY (Gallons)
HEAT EXCHANGER SURFACE AREA SQ.FT.
HEAT EXCHANGER SURFACE AREA SQ.FT.
RECOMM. FLOW RATE GPM (Boiler Water)
RECOMM. FLOW RATE GPM (Boiler Water)
PRESSURE DROP FT. HD. (Heat Exchanger)
PRESSURE DROP FT. HD. (Heat Exchanger)
FIRST HR. RATINGS GPH 90 DEGREE RISE
FIRST HR. RATINGS GPH 90 DEGREE RISE
CONTINUOUS FLOW GPH 90 DEGREE RISE
CONTINUOUS FLOW GPH 90 DEGREE RISE
FIRST HR. RATINGS GPH 70 DEGREE RISE
FIRST HR. RATINGS GPH 70 DEGREE RISE
CONTINUOUS FLOW GPH 70 DEGREE RISE
CONTINUOUS FLOW GPH 70 DEGREE RISE
BOILER SIZE BTU'S REQUIRED
BOILER SIZE BTU'S REQUIRED
TT-40 TT-55 TT-79 TT-119
TT-40 TT-55 TT-79 TT-119
40 55 79 119
14 14 26 26
10 10 14 14
2.3 2.3 11 11
188 225 295 376
160 187 240 293
233 277 363 460
205 239 308 377
120,000 140,000 180,000 220,000
NOTE: ABOVE RATINGS BASED ON BOILER MAINTAINING TEMPERATURE OF 180 DEGREES FAHRENHEIT.
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