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Applications manual | 11.2007Bosch Water Heating
Applications manual
| 29
4.3 External storage tank loading applications.
Introduction
This section lays out tank loading options for high volume water
heating for large residential and light commercial applications
including continuous fl ows and high volume demands of large home
and commercial applications.
4.3.1 GWH 345/450 ESR pressure drops and circulator guidelines
The maximum amp draw for any circulator connected directly to
the appliance must not exceed 1.5 amps
Circulator should be sized by the professional plumbing
contractor
Bronze or stainless steel circulators required for all open loop
applications
Pressure drop curves
Note : Flow above 6 GPM is not permitted.
GWH 345 ESR
0 feet of head
10 feet of head
20 feet of head
30 feet of head
40 feet of head
50 feet of head
0 GPM 1 GPM 2 GPM 3 GPM 4 GPM 5 GPM 6 GPM
water flow rate
Inlet pressure
GWH 450 ESR
0 feet of head
10 feet of head
20 feet of head
30 feet of head
40 feet of head
50 feet of head
0 GPM 1 GPM 2 GPM 3 GPM 4 GPM 5 GPM 6 GPM
water flow rate
Inlet pressure