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MAN3488
d. Sprinkler Digital Temperature Controller
The sprinkler digital temperature controller is a programmable
microprocessor used to monitor temperatures via a resistive
temperature device (RTD).
NOTE: Operating parameters are preset at the factory and
should not require any adjustment.
2. Sprinkler System Operation
NOTE: Refer to the ladder diagram provided with the dryer for
specific relay logic.
Master Relay - The coil in this relay must be
energized in order to close the
contacts needed to supply power to
the dryer’s control system.
Relay 1 - The coil in this relay energizes if the set
point is reached closing Contact 1 and
Contact 2. Contact 1 latches Relay 1 on.
Contact 2 closes, turning on the sprinkler,
the horn, and the reset button light. Relay
1 will remain energized until the reset button
is pushed.
Relay 2 - The coil in this relay energizes if the set
point is reached closing Contact 3, de-
energizing the Master Relay, and shutting
power off to the dryer. Relay 2 will remain
energized until the reset button is pushed.
NOTE: The sprinkler system will remain on until
the basket (tumbler) temperature falls
below the set point, and the reset button
is manually activated.
3. Sprinkler System Component Replacement
a. RTD Replacement
1) Turn the water supply to the dryer off.
2) Discontinue electrical power to the dryer.
3) Remove the 1/4” compression fitting.
4) Remove the two (2) screws from the junction box cover.