RESETTING FROM RESTRICTED LOCKOUT
•If the control locks out three times without a satisfied call for heat, or due to other significant events such as a relay contact weld, the Lockout becomes restricted in order to prevent repetitious resetting by the homeowner.
CAUTION
Before resetting the control from restricted lockout state, troubleshoot the heating system for the root cause(s) of lockout and make necessary repairs or adjustment to ensure a safe start condition.
•Then, to reset, hold the button down for 15 seconds until the red light turns off and the yellow LED turns on. Observe at least one full control sequence of operation from startup to shutdown. Simulate a flame failure lockout by following the procedure (within this manual). If the operation is erratic, or not to specifications, then replace the control. Always verify the control functions according to all specifications before leaving the installation site.
DISABLE FUNCTION
•Any time the burner is running, press and hold the reset button to disable the burner. The burner will remain off as long as the button is held.
Burner Option – Flame Quality Monitor
This control is trained to recognize and remember a good flame based on initial burner set up. Control then monitors the flame via the CAD cell signal for deviation in the combustion characteristics of the burner. If the control senses a deviation on the high side or on the low side from the original set up condition for three consecutive cycles, it will trigger an alarm circuit which can be tied to an audible local device to signal the home owner or into the home security system. Upon being notified of the alarm, the security agency will notify the dealer of choice based upon information supplied by the home owner. The system will also be capable of being connected to a phone line that will contact the dealer directly with the alarm. This alarm will typically sound 3 to 5 days prior to the primary control going into lockout giving the service agency a prior notice before a sooting condition or other failure can occur resulting in untold savings. This monitor system is available through your local distributor under the Honeywell Part #QS7100F.
Electronic Blower Control Board (EBC)
This furnace is equipped with an Electronic Blower Control (EBC), which controls all comfort air blower operations. This EBC has three relays; one for heating speed, one for cooling speed, and one which isolates the
NOTE: If a jumper wire is placed across “R” and “W” prior to turning on power to the unit and then power is applied, the comfort air blower will start and run for the ignition period and through the entire call for heat.
Once this call for heat is satisfied, the blower will function according to the regular blower on and blower off delay cycles.
This EBC is designed to be very simple and dependable. This basic control allows for easy troubleshooting and maintenance. As illustrated in Figure 7 all connections are well marked. The blower on and off timings for both heating and cooling speeds are timed automatically. The heating blower off delay can be selected from four different timings by moving the selection jumper. The timings are as follows:
Heating Blower ON delay – 75 seconds from a call for heat.
Heating Blower OFF delay – Selectable in seconds: 150, 180, 210 or 240. Factory shipped at 240.
Cooling Blower ON delay – 6 seconds from a call for cooling.
Cooling Blower OFF delay – 60 seconds.
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