Ashby-P Insert
Page 35
WARNING: The Insert has been Safety Tested by an accredited, independent
laboratory.
These safety features are designed to protect life and property. Bypassing
these features voids all warranties and the safety listing of the Ashby-P.
During “Normal Operation” a 60 second delay has been incorporated before the unit shuts down
when the board senses loss of vacuum. This is to accommodate opening the doors during
maintenance. Once the board senses loss of vacuum the ON/OFF light will start blinking. While
the light is blinking the control board will not feed any fuel nor respond to any of the buttons.
Once Vacuum has been restored the unit will revert to normal operation.
Unresponsive Control Board -
When the control board becomes unresponsive, the control
board may be in Internal Alarm. The control board has sensed one of the Safety sensors. This
may cause the unit to go out and flash a Diagnostic Code. In some cases, after waiting
approximately 45 seconds the Insert will start responding to the control board again. Many times,
the cause of this is a change in the vacuum inside the firebox. This may be caused by excessive
wind or by opening the Firebox door. The control board will monitor the vacuum switch and
resume normal operation if the vacuum returns to normal.
Caution: See Cleaning Cycle on page 28. The control board is locked out during the
cleaning cycle and may appear to be unresponsive. Simply wait until the cycle is complete
(Once the power light quits blinking) and the board will respond again.
Safety Features
1.
”High Limit” switch”,
an overheat safety switch will shut off the fuel feed if the Insert
reaches temperatures above normal operating temperature. This is a “Normally Closed” switch.
If the High limit switch trips several times, the problem in the Insert
must
be diagnosed before
the unit is put back into service, (Defective Room Fan, dirty Room Fan, defective High Limit
switch or possibly a bad Control Board)
2.
Vacuum switch
also called the
Negative pressure switch
. When the Insert is turned on
the Exhaust fan will create a negative pressure in the firebox. The control board continually
checks to see if Negative Pressure (vacuum) is present during operation of the Insert. If the
exhaust venting system becomes clogged or obstructed, the firebox door is left open or the
exhaust fan quits working the control board will go into “Safety shutdown”. There is a 60 second
window to allow for cleaning the glass before then unit shuts down. This is sufficient for the
Daily Maintenance
3.
Proof of Fire switch
also called the
P.O.F.
This senses the temperature rise in the
exhaust system. The switch is “Normally Open” and closes the circuit at 110 degrees. The Insert
will shut down if temperatures above 110 degrees F are not sensed during start up or if the
temperature drops below 110 degrees during normal operation.
4.
Hopper Lid Switch.
The hopper lid switch will shut off the auger motor when the
hopper lid is open. Be sure the lid closes completely when refilling the hopper or the unit will
shut down
