John Wood Commercial - AJWSC - Manual (Page 15)

Figure 11 Commercial Unit with Auxiliary Booster Heater - Two Temperature (With or Without Building Recirculation)
Note: Install a vacuum
relief valve if required
by local codes.
45mm (1 1/2 in.)
Cold water supply
– 15 –
Shut-off Valve
Check Valve
Typical
Booster
Heater
Thermometer
Temperature
and Pressure
Relief Valve
Thermal
Expansion
Tank
Pre-Heated
Water to
the Booster
Pressure
Reducing
Valve
Pre-Heater
Outlet Boosted
Temperature Hot Water
to Fixtures
Thermometer
Shut-off Valve
Shut-off Valve
Temperature
and Pressure
Relief Valve
Note: Install a vacuum
relief valve if required
by local codes.
45mm (1 1/2 in.)
Cold water supply
Shut-off Valve
Check Valve
Typical
Booster
Heater
Thermometer
Temperature
and Pressure
Relief Valve
Thermal
Expansion Tank
Pre-Heated
Water to
the Booster
Pressure
Reducing Valve
Pre-Heater
Outlet Boosted
Temperature Hot Water
to Fixtures Thermometer
Shut-off Valve
Temperature
and Pressure
Relief Valve
Figure 12 Commercial Unit with Auxiliary Storage Heater - Forced Circulation With or Without Building Recirculation -
Top Inlet/Outlet Connections