Greenfield Installation and Operations Stove
Page 35
WARNING: The Stove 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 Furnace.
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 for the entire 60 second delay. While the light is blinking the control board
will not respond to any of the buttons.
“Internal Alarm” -
When the control board becomes unresponsive, the control board is in
Internal Alarm. The control board has sensed one of the Safety sensors. This may cause the unit
to go out. In some cases, after waiting approximately 45 seconds the Stove 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.
“Power Reset”
- If the board becomes unresponsive for a long period of time, you must unplug
the Stove, wait 10 seconds and plug the unit back in to reset the board.
Safety Features
1.
”High Limit” switch”,
an overheat safety switch will shut off the fuel feed if the Stove
reaches temperatures above normal operating temperature. This is a “Normally Closed”
switch. If the High limit switch trips several times, the problem in the Stove
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 Stove 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
Stove. 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 delay, to allow for cleaning the glass or other
maintenance, before then unit shuts down (See 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 Stove 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.
Do
not bypass the Hopper Lid switch.
