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Figure 37: Minimum Piping Requirements for Series 24 Tankless Heater Manifolds
Figure 38: Schematic Tankless Heater Piping
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1 2 3 4
30-42
57.6 --- --- ---
40-42
5.7 --- --- ---
50-42
5.7 --- --- ---
60-42
5.7 51 --- ---
70-42
5.7 51 --- ---
80-42
5.7 51 --- ---
90-42
5.7 51 5.22 ---
01-42
5.7 51 5.22 ---
11-42
5.7 51 5.22 ---
21-42
5.7 51 5.22 03
Notes:
1. Ratings are given in gallons per minute continuous
flow of water heated from 40°F to 140°F with 200°F
boiler water.
2. For tankless heater quantities less than maximum
allowable, it is important that water heaters be
centrally located in the boiler.
See Figure 8 for appropriate locations.
3. Tankless heater pressure drop is 5.5 PSI at
7.5 GPM.