M9/M11 Sterilizer Fan System Theory of Operation
To prevent risk of shock always disconnect power before removing covers or performing any service procedure.
Some procedures require power to be connected with covers removed. Line voltage is present. Use extreme caution to prevent electric shock.
The fan may run continuously when running consecutive cycles.
The illustrations show only the components that affect the Fan System. Refer to the dropdowns for detailed descriptions of the Fan System.
Model Range -020 thru -022, -033, -034
|
Model |
M9/9D -020 thru -022, -033, -034 |
M11/11D -020 thru -022, -033, -034 |
| Serial Number | All | All |
The Fan System reduces heat inside the enclosure by circulating air between the chamber and the covers.
The electrical current to the fan system does not pass thru the high-limit thermostats on bottom of chamber.
Primary Fuses
With the Sterilizer’s power cord properly connected, facility supply voltage is supplied to the Main PC Board thru the two primary fuses. If either fuse is faulty, the sterilizer will have no power.
Fan Thermostat
When power is supplied to the Main PC Board, current continuously flows to the fan thermostat.
The fan thermostat controls the ON/OFF function of the fan. When the temperature at the thermostat is less than 130°, the fan thermostat contacts are open (no current to the fan). When the temperature reaches 130°, the fan thermostat contacts close (current flows to the fan).
When the temperature drops to approximately 100°, the contacts of the fan thermostat open and the fan stops running.
Fan
When the contacts of the fan thermostat are closed, line voltage is applied to the fan causing the fan to run. When the contacts of the thermostat open, current is removed and the fan stops.
Model Range -040 thru -043
|
Model |
M9 -040 thru -043 | M9D -042 | M11 -040 thru -043 |
| Serial Number | All | All | All |
The Fan System reduces heat inside the enclosure by circulating air between the chamber and the covers.
The electrical current to the fan system does not pass thru the high-limit thermostats on bottom of chamber.
Primary Fuses
With the Sterilizer’s power cord properly connected, facility supply voltage is supplied to the Main PC Board thru the two primary fuses. If either fuse is faulty, the sterilizer will have no power.
Fan Thermostat
When power is supplied to the Main PC Board, current continuously flows to the fan thermostat.
The fan thermostat controls the ON/OFF function of the fan. When the temperature at the thermostat is less than 130° F, the fan thermostat contacts are open (no current to the fan). When the temperature reaches 130° F, the fan thermostat contacts close (current flows to the fan).
When the temperature drops to approximately 100° F, the contacts of the fan thermostat open and the fan stops running.
Fan
When the contacts of the fan thermostat are closed, line voltage is applied to the fan causing the fan to run. When the contacts of the thermostat open, current is removed and the fan stops.
