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SUMMARY: With UV (under voltage control of the main disconnect) energized, the ADS-464 main switch may
be turned on.
STATE 2 - The tumbler (basket) temperature has risen ABOVE SHLC (Sprinkler High Limit Controller)
preset trip value. With power applied to the SHLC:
SHLC set point will open
SHLC alarm will close
#2CR (#2 control relay) will become energized
S11 will be energized (sprinkler valve open)
L4 (light #4) will be energized (sprinkler valve open)
SP2 will activate alarm horn.
#2CR B will open.
SHLC alarm relay will toggle, causing the alarm contact to close and activate 2CRs (control relays) coil.
This action will;
Open 2CR B causing UV, the under voltage trip feature of the ADS-464s main disconnect to shut
down the MAIN POWER to the dryer.
Latch 2CR A ON to eliminate any automatic reset of the sprinkler solenoid
Energize the SPRINKLER ON air solenoid
Illuminate the SPRINKLER RESET BUTTON
Sound sprinkler alarm horn
NOTE: The sprinkler circuit will not reset until the ADS-464s temperature is below the sprinkler hi-
limit controller setting.
STATE 3 - The tumbler (basket) temperature is still ABOVE SHLC (Sprinkler High Limit Controller)
preset value and PB #10 (push button #10) Sprinkler Reset has been pushed and held IN.
With power still applied to the SHLC:
#3CR will energize
S12 will energize
#3CR A will open
#2CR will de-energize
L4 will go off
SP2 will go off
SUMMARY: #3CRs (#3 control relays) coil will energize causing:
3CR A will open and remove power from 2CR, S11, L4 and SP2
S12 sprinkler off air solenoid will activate turning off the actuated sprinkler valve
IMPORTANT: If the tumbler (basket) temperature is still ABOVE SHLC (Sprinkler High Limit
Controller) preset value, and the SPRINKLER RESET button is released the water
valve will open again. (Refer to STATE 2 above.) If the tumbler (basket)
temperature is BELOW the SHLC preset value when the SPRINKLER RESET
button is released, the water valve will remain closed. (Refer to STATE 1 on page
48.)