Thrush DSHE Series - Manual (Page 9)

Thrush Co.
Manual #9636-0555
3.1.3 Temperature Aquastat
The temperature aquastat limits the temperature of water inside the shell. The aquastat
must be set 15 degrees higher than the maximum operating temperature. If the water
temperature exceeds this limit, the aquastat sends a signal to the solenoid valve to dump
the overheated water. (Figure 3-4)
Figure 3-4 Temperature Aquastat
3.1.4 Solenoid Valve
The solenoid valve is an electrically actuated valve that dumps overheated water. The
solenoid valve must be piped to an adequate drain. If water inside the shell exceeds a
predetermined set point on the temperature aquastat, the aquastat sends a signal to this
valve telling it to open. The valve will then discharge the overheated water to a drain.
(Figure 3-5)
Water will be very hot, potentially scalding, causing serious bodily injury.
Figure 3-5 Solenoid Valve