Laarsen Associates PW - Manual (Page 14)

LAARS HEATING SYSTEMS Page 14
Figure 16. Two-Temperature Hot Water Supply System (Model VW or PW).
With
Vertical
Tank
With
Horizontal
Tank
Legend
B - Check Valve in Hot Water Supply
to Tempering Valve
C - Check Valve in Return Line from
Building Loop
D - Tempering Valve
E - Venturi (Suction) Tee
H - Throttling Valves in Building Loop
Returns
I - Circulating Pump for 180° Building
Loop
J - Circulating Pump for 140° Building
Loop
K - Service Valves to Isolate Heater
and Pump for Service
Legend
B - Check Valve in Hot Water Supply
to Tempering Valve
C - Check Valve in Return Line from
Building Loop
D - Tempering Valve
E - Venturi (Suction) Tee
H - Throttling Valves in Building Loop
Returns
I - Circulating Pump for 180° Building
Loop
J - Circulating Pump for 140° Building
Loop
K - Service Valves to Isolate Heater
and Pump for Service