20
ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Ultra-sorb XV operation
OPERATION
TEMPERATURE SWITCH
The temperature switch circuit’s sequence of operation is a safety sequence: In
the unlikely event that excessive header condensate cools the heat exchanger
while humidifying, the temperature sensor drops below operating temperature,
and the switch opens. This signals the modulating steam valve or STS
humidifi er control system to stop humidifi cation steam from entering the header
and prevents further condensate production.
See the temperature switch sensor in Figure 20-1 and Figure 20-2.
OM-7536
Note: Dashed lines indicate
provided by installer.
Electric temperature switch
(install as close to heat
exchanger outlet as possible)
FIGURE 20-1: ELECTRIC TEMPERATURE
SWITCH
XV-4
FIGURE 20-2: PNEUMATIC TEMPERATURE SWITCH
Pneumatic
valve
Pneumatic
temperature
switch
Restrictor
.007 dia.
orifi ce
Pneumatic
supply by
others 0-20
psi (0-138
kPa)
