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E. Sprinkler System Description
The AD-200 sprinkler system is monitored by a microprocessor based temperature controller as a designated
"FAIL-SAFE." The microprocessor circuit must have power in order to engage main power to the dryer.
When cycling the dryer, if the temperature at the Resistive Temperature Device (RTD) reaches 575º F, one (1)
set of contact in the controller will open, disabling the power (electric supply) to the dryer. Another set of
contacts will close, sounding the alarm and turning on the sprinkler.
NOTE: The sprinkler as well as the alarm will remain on until the "amber" colored sprinkler
reset button is pressed and the temperature in the tumbler (basket) falls below 575º F.
1. Description Of Components
b) Sprinkler Valve
The sprinkler valve is a 2-way, air piloted, normally closed
valve. With pilot air pressure applied, the valve opens
allowing water to flow.
c) Sprinkler Solenoid Valve
The sprinkler solenoid valve is a 3-way/2-position solenoid
valve that is used to supply pilot air to the sprinkler valve.
MAN3187
a) Resistive Temperature Device (RTD)
The RTD is located above the tumbler (basket). The probe
is a 100 (ohm) platinum RTD. As the temperature
increases or decreases the resistance value corresponds to
the ambient temperature (i.e., 100 = 32º F / 0º C ... 109
= 75º F / 24º C).
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