American Dryer Corp AD-310 Phase 7 service manual 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).	MAN3488

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” (6.35 mm) compression fitting.

4)Remove the two (2) screws from the junction box cover.

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