LAARS Mighty Therm VW (Sizes 2000-5000) - Installation, Operation and Maintenance Instructions - Manual (Page 11)

Page 11 Mighty Therm Volume Water Heaters
C
D
B
K
J
C
H
C
H
J 180 ° F
Water
To
Bldg.
Conventional
Tank
Pump
140 ° F Water
To Bldg.
To
Drain
To Drain
Cold
Water
To
Drain
Pump
140 ° F Water
Return From
Bldg.
180 ° F Water
Return From
Bldg.
Cold Water
Figure 13. Safety-Flo Two Temperature Hot Water Supply System with Vertical Tank (Two Heaters).
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
Heavy line indicates heater-to-tank circulating loop
Figure 12. One Temperature Hot Water Supply System
with Horizontal Tank. Figure 11. One Temperature Hot Water Supply System
with Vertical Tank.
Cold
Water
Bldg.
Loop
Circ.
Pump
Check
Valve
Throttling
Valve
Hot
Water
To Bldg.
Conventional
Tank
Alternate
Cold Water and
Bldg. Loop
To Drain