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E. SPRINKLER SYSTEM DESCRIPTION
The 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 (301.6 º C).

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.
MAN3187
a) Resistive Temperature Device (RTD)
The RTD is located above the tumbler (basket). The probe is a
100 Ω (ohm) platinum RTD. As the temperature increases or
decreases the resistance value corresponds to the ambient
temperature (i.e., 100 Ω = 32º F / 0º C ... 109 Ω = 75º F / 24º C).
MAN3479
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.