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Manual 2100-422
Page 12
BECKETT R7184B PRIMARY
OPERATIONAL GUIDE
Pre-Purge Delay – 15 seconds on delay
LED Codes – Flashing 1/2 second on / 1/2 second off – system is locked out or in restricted mode
(hard lockout).
– Flashing 2 seconds on / 2 seconds off – control is in recycle mode (soft lockout).
– ON – CAD cell is sensing flame
– OFF – CAD cell is not sensing flame.
Ignition Trials – On any given call for heat the
control will allow three ignition trials. After the three
trials the control will go into a soft lockout mode. The
LED will flash 2 seconds on and 2 seconds off when
in this recycle mode. The control may then be reset
by pressing the RED reset button on the control. If
within the same original call for heat the control will
again allow three ignition trials followed by another
soft lockout and a 2 second on / 2 second off LED
code. The control my be reset one additional time by
pressing the red reset button. This will allow three
final ignition trials. If all three of the final ignition trials
fail then the control goes into a hard lockout or
Restricted Mode. This series of ignition failures must
all occur with the original call for heat in order to
reach the Restricted Mode. The LED will now flash
1/2 second on / 1/2 second off indicating the
restricted mode. The control can be resurrected from
the restricted mode only by pressing and holding the
red reset button for approximately 30 seconds until
the LED flashes twice. Removing unit power or
resetting the thermostat will not reset the control
Checking CAD Cell – With a call for heat and the burner ignited, press and release the red reset button. The
LED will go out and then flash 1, 2, 3, or 4 times before returning to the run mode. The CAD cell resistance
must be below 1600 ohms for proper operation.
– 1 flash – Less than 400 ohms
– 2 flashes – More than 400 and less than 800 ohms
– 3 flashes – More than 800 and less than 1600 ohms
– 4 flashes – More than 1600 and less than 5000 ohms
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 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 typical 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 no. 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 T–T signal from the oil primary control.
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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