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Sensor Activated Fire Extinguishing (S.A.F.E.) System
Theory of Operation
While the dryer is in an idle state or 20-seconds after the heat turns off, the Phase 7 control monitors the
S.A.F.E. system probe located in the top of the basket (tumbler) chamber and records the minimum temperature.
If the minimum recorded S.A.F.E. system probe temperature is no less than 120° F (48° C) and the control
detects a 50° rise in temperature, this will be the trip point and the S.A.F.E. system routine will activate.
While a drying cycle is in process and the heat has turned on at least once, the Phase 7 control monitors the
exhaust temperature transducer. If the drying cycle temperature set point is set greater than 160° F (71° C) and
the control detects an exhaust temperature rise 25° F greater than set point, this will be the trip point and the
S.A.F.E. system routine will activate. If set point is below 160° F (71° C) the trip point will be 185° F (85° C).
Once the S.A.F.E. system routine is activated, water will be injected into the basket (tumbler) chamber. Anytime
water is being injected into the basket (tumbler); the basket (tumbler) drive will turn the load for 1-second every
15-seconds. This process will continue for a minimum of 2 minutes. After 2 minutes has elapsed, the control will
check if the temperature remained above trip point, if so water will remain on. The control will continue to check
if temperature is above trip point every 30-seconds. If the water has been on for a constant 10 minutes, the
water will be turned off regardless of the temperature. If the temperature has dropped below trip point, the
control will turn off the water prior to 10 minutes.
SYSTEM RESET
After the microprocessor determines that the situation is under control and shuts the water being injected into the
basket (tumbler) off, the microprocessor display will read “S.A.F.E. System activated,” and the horn/tone will
sound until reset manually.
To reset the microprocessor once the control displays “S.A.F.E. System activated,” press the red
key on the
keyboard (touch pad).
NON-COIN S.A.F.E. SYSTEM CHECK PROCEDURE
The operation of the water solenoid valve can be tested to insure that the water supply system and valve are
functional. Before attempting system check, be sure that
ALL
water supply shutoff valves to the dryer are in the
OPEN position, and the dryer
must be
in the “READY” mode where no cycle is loaded or in progress.
The procedure is as follows:
1. Press and hold the RED STOP key (while in “READY” mode and no cycle in progress).
2. Press and hold the “A” key.
3. Water valve will open and water will be dispensed into basket (tumbler) area as long as both keys are held.
IMPORTANT:
This is a test function only and the keys
should be
held and system activated for only
a second or so, otherwise water will accumulate in various places in the dryer.
