American Water Heater 71681 Installation Instructions And Use & Care Manual page 11

Index
Outlet
Boosted
Temperature
Thermometer
Temperature and
Pressure Relief Valve
Typical
Booster
Heater
Shut-off valve
Figure 7: Commercial Unit with Auxiliary Storage Heater - Forced Circulation With or Without
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Figure 6: Commercial Unit with Auxiliary Booster Heater -
Two Temperature (With or Without Building Recirculation)
Thermometer
Shut-off valve
Check Valve
Pre-Heated
Water to
the Booster
Building Recirculation - Front Inlet/Outlet Connections
Thermometer
Temperature and
Pressure Relief Valve
Shut-off valve
Heater
Shut-off valve
Hot Water
to Fixtures
Shut-off valve
Thermal
Expansion
Tank
Pressure
Reducing
Valve
Check
Plug
Valve
Cock
Circulating
Pump
Shut-off valve
Temperature and
Pressure Relief Valve
Pre-Heater
Thermal
Expansion
Tank
Shut-off valve
Pressure
Reducing
Valve
Note: Install a vacuum
relief valve if required
by local codes.
Hot Water
Outlet
Storage Tank
Temperature
and Pressure
Relief Valve
1 1/2" Cold
water supply
Note: Install a vacuum
relief valve if required
by local codes.
1 1/2" Cold
water supply
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