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TANKLESS
WATER HEATERS
Models & Prices
Tankless Water Heater Product Guide
Description / Specification
Tankless Water Heater Applications
Residential / Commercial
Tankless Water Heater Electrical Guide
Service Calculations
Tankless Water Heater Installation
Plumbing / Electrical
Tankless Water Heater Cost Comparisons
Reports / Listings
Tankless Water Heaters Service Guide
Remove / Repair
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Product
Specifications Table
Commercial 208 Volt (AC) Operation,
240 VAC Rating
Commercial and industrial locations are often served by
208 V three-phase electrical services. Where 240-V rated SEISCO heaters
are used at 208 V, their available wattage, and therefore their temperature
rise, are de-rated by 25%. The table below shows which ratings are affected.
Other specifications are the same as for 240 V operation.
SEISCO®
Electric Fluid Heating System
BACK
TO Tankless Water Heater Product Guide
[ Four Chamber
Models ]
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MODEL
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RA-28
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RA-22
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RA-18
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kW
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21
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16.5
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13.5
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Elements
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7000 watts ´ 4
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5500 watts ´ 4
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4500 watts ´ 4
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Btu/hr
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71670
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56310
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46070
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kg-cal/min
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300
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236
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194
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TEMPERATURE RISE
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71 °F @ 2.0 GPM
57 °F @ 2.5 GPM
48 °F @ 3.0 GPM
36 °F @ 4.0 GPM
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56 °F @ 2.0 GPM
45 °F @ 2.5 GPM
37 °F @ 3.0 GPM
28 °F @ 4.0 GPM
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45 °F @ 2.0 GPM
36 °F @ 2.5 GPM
30 °F @ 3.0 GPM
22 °F @ 4.0 GPM
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37 °C @ 8 L/min
30 °C @ 10 L/min
25 °C @ 12 L/min
19 °C @ 16 L/min
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30 °C @ 8 L/min
24 °C @ 10 L/min
20 °C @ 12 L/min
15 °C @ 16 L/min
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24 °C @ 8 L/min
19 °C @ 10 L/min
15 °C @ 12 L/min
12 °C @ 16 L/min
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ELECTRICAL
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V
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208
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208
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208
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A (max)
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101
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79
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65
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Hz
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50 / 60
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50 / 60
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50 / 60
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Circuits
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30A x 4
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50A x 2
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40A x 2
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