IBC AHU 800 - Connecting the Appliance to a Boiler; Sizing Pumps

Figure 30 Opening with shears
2.4 Connecting the appliance to a boiler
Generally it’s best to place the appliance as close as practical to the boiler. If placing the appliance
away from the boiler, ensure the piping system is designed to allow the easy removal of air from
the boiler piping and easy flushing of the system.
Copper Pipe Sizing BTU / HR Capacity @20°F (11°C) ΔT
½" 16,000 BTU
¾" 36,000 BTU
1" 72,000 BTU
1¼" 110,000 BTU
Table 8 Pipe sizing
2.4.1 Sizing pumps
Note
To size the pump, refer to the Installation manual of the boiler manufacturer for boiler
head loss specifications.
Air Handler Coil Head Loss - AHU 800
Flow rate (gpm) 3 4 5
Fluid pressure drop (ft) 1.6 2.7 3.5
Table 9 Air handler coil head loss at 180°F (82°C) - AHU 800
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Section: Installation