035-17473-000-B-1101
Unitary Products Group
19
R7184 DETAILED SEQUENCE OF OPERATION
A.
SAFETY CHECK IS MADE FOR FLAME (4 SECOND
DELAY).
1.
When flame is not present, the R7184 will apply
power to the burner motor and ignition trans-
former.
2.
When flame is present, the control remains in the
idle state.
B.
CONTROL ENTERS THE TRIAL FOR
IGNITION STATE.
C.
CONTROL MONITORS THE BURNER FLAME.
1.
When flame is present, the control enters ignition
carryover state. (Continues to spark for 10-30
seconds).
a
Provides continuous spark after flame is
sensed to assure that burner remains lit.
b
Turns on LED diagnostic light.
c
Starts carryover timer.
•Flame and call for heat are monitored.
Ι
f flame is lost and lockout timer has not expired,
R7184 will return to trial for ignition state.
•If flame is lost and lockout timer has expired,
R7997 will enter the recycle state.
•Recycle timer starts.
•Burner motor and igniter are turned off.
•LED diagnostic light flashes slow.
•Returns to idle state when recycle timer
expires (60 seconds).
•Carryover timer expires.
•Enters run state.
•Igniter turns off.
Combustion continues until thermostat is satisfied or
R7184 detects a loss of flame and enters into Recycle
Mode.
Thermostat is satisfied - call for heat is terminated:
•R7184 shuts off burner motor.
•LED diagnostic light is off.
•R7184 returns to idle state.
