Filter
Top Products
51
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 greater 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, the control will display “Fire Suppression System Activated”
and 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 and the control will display “FSS was Activated.” If the temperature has dropped below trip
point, the control will turn off the water prior to 10 minutes.
Disabled Sensor Activated Fire Extinguishing (S.A.F.E.) System
In the event that the S.A.F.E. system is not installed properly or if there is a malfunction in the system the Phase
7 coin control will notify the user by displaying the message ‘FSS DISABLED...” If the “PAUSE” and “LO”
keys are simultaneously pressed, the control will display one of the following diagnostic messages indicating the
fault with the system. If there is more than one issue with the S.A.F.E. system, the control will display one
message at a time.
S.A.F.E. System Diagnostic Messages
Open FSS Probe Fault: This message indicates that the S.A.F.E. probe is either not connected or is
damaged.
Shorted FSS Probe Fault: This message indicates that the S.A.F.E. probe is damaged or the wiring is
shorted.
Open FSS Valve Fault: This indicates that the water valve is open or that it is not connected to the
control.
Shorted FSS Valve Fault: This indicates the water valve is shorted or the wiring to the valve is shorted.
Water Not Connected: This indicates that there is no water pressure at the water valve. This will occur if
water is not connected to dryer or if there is low water pressure in the water line coming to the dryer. This
could also be a defective pressure switch or wiring to the pressure switch.
SYSTEM RESET
To reset the microprocessor once the control displays “FSS Was Activated,” press and hold the “PAUSE”
key for 3-seconds.