151B0801 R5 3/28/2006
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TABLE C-1: EFT DETAILED SEQUENCE OF OPERATION
Mode Action
System
Response
HEAT
Thermostat calls for heat.
("W" terminal is energized).
a. Electronic fan timer energizes oil burner. (T – 3/T connections
for Beckett R7184).
b. R7184 oil primary control starts the oil burner. Oil flows as
long as the oil primary control senses flame.
c. Burner motor and valve is energized and heat "fan on" delay
timing begins. When timing is complete, the circulator fan is
energized at heat speed.
Thermostat ends call for heat.
("W" terminal is de-
energized).
a. R7184 oil primary control is de-energized, terminating the
burner cycle.
b. Heat "fan off" delay timing begins. Length of delay depends on
electronic fan timer dipswitch settings. When timing is
complete, the circulator fan is de-energized.
c. Electronic fan timer returns to standby mode, (Oil primary
control and circulator fan are off, unless continuous fan
operation is selected at the thermostat).
Burner fails to light.
a. Oil primary control locks out within lockout timing, (30
seconds).
b. Burner motor is de-energized. (Even though thermostat is still
calling for heat).
c. If circulator fan has started, it continues through the selected
heat “fan off” delay period.
Established flame fails.
a. Burner motor is de-energized and oil primary control goes into
recycle mode.
b. If the selected heat “fan off” delay timing is longer than the
recycle delay timing, the circulator fan continues to run
through the next trial for ignition.
COOL
Thermostat begins call for
cool. (G and Y terminals are
energized).
a. Cooling contactor is energized immediately.
b. Circulator fan is energized at cool speed.
Thermostat ends call for cool.
(G and Y terminals are de-
energized).
a. Cooling contactor is de-energized immediately.
b. Circulator fan turns off immediately.
FAN
Thermostat begins call for
fan. (G terminal is energized).
a. Circulator fan is energized immediately at cooling speed.
Thermostat ends call for fan.
(G terminal is de-energized).
a. Circulator fan is de-energized immediately.
LIMIT
Limit switch string opens.
a. Oil primary control shuts off burner.
b. Circulator fan is energized immediately at heat speed.
c. Electronic fan timer opens oil primary control. (T – 3/T
connections for Beckett R7184).
Continued on following page.
