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Page 12
5
Figure 12. Hot Water Supply System with Dual Tanks, Building Loop Return and Circulating Pump.
180°F
Water
To
Bldg.
To
Drain
Pump
Figure 13. Two-Temperature Hot Water Supply System with Vertical Tank.
Conventional
Tank
140°F Water
To Bldg.
C
2
140°F Water
180°F Water
Return From
Return From
Bldg.
Bldg.
H
C
H
C
J
J
To
D
Drain
Cold
Water
K
To Drain
B
Cold Water
BRADFORD WHITE
4
3
2
Pump
Legend
B - Check Valve
C - Check Valve
D - Tempering Valve
H - Throttling Valves in Building Loop Returns
J - Circulating Pump for Return Loop
K - Service Valves to Isolate Heater and Pump
for Service
1
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