PIPING - DOMESTIC HOT WATER SUPPLY HEATERS
GENERAL SPECIFICATIONS
UNI-TEMP 80 HOT WATER SUPPLY SYSTEMS
T = Temperature Rise, Degree F@GPM FLOW | MPS = Minimum Pipe Size, NPT |
GPM = Gallons per Minute Flow | SHL = System Head Loss |
P = Pressure Drop, Foot thru Heat Exchanger |
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The table above provides data for selecting
1.Flow rates are based on water hardness as measured in grains per gallon. Soft:
Medium:
Hard: 16 and over grains per gallon.
2.Maximum Flow Rates:
133 | 22 GPM |
45 GPM | |
90 GPM | |
200 GPM |
3.Pressure drop values ( P and SHL) and minimum pipe sizes are for
4.Sizing based on heater and tank being placed 5 feet apart. The equivalent length of pipe valves and fittings in the system is as follows:
2" NPT = 75 Ft | 3" NPT = 85 Ft |
Additional pipe fittings will increase the system head loss.
5.Select a pump based on the water hardness, flow, and system head loss.
6.If heater is more than two stories above the tank, consult the factory.
NOTE:
GPM flow rates are limited by maximum acceptable velocity through heat exchanger tubes. Heater models 514 through 1826 may be provided with an integral
20