Thrush DSHE Series - Manual (Page 8)

Thrush Co.
Manual #9636-0555
3.1.1 Safety Relief Valve
The safety relief valve is a valve that automatically relieves pressure on the inside of the
shell (also known as the water side). If the temperature or pressure inside the shell
exceeds a specified setting, the valve will open. Field installation is required for the
safety relief valve and also requires an adequate drain be piped to the discharge side of
the valve. (Figure 3-2)
Because this is an automatic valve, hot (potentially scalding) water could be
released without warning.
Figure 3-2 Safety Relief Valve
3.1.2 Temperature Gauge
The temperature gauge is a visual representation of the temperature inside the shell
(or water side). It can be used as a reference when setting the temperature aquastat.
(Figure 3-3)
Figure 3-3 Temperature Gauge