Honeywell R7284B Installation Instructions Manual page 9

WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Troubleshoot with the system powered. Be
careful to observe all precautions to prevent
electrical shock or equipment damage.
External Action
Power applied to control.
Thermostat or Aquastat®
Control calls for heat.
Call for heat is satisfied.
Reset control three times
without completing a call for
heat (number of resets is
adjustable in some controls)
R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED
Table 5. R7284 Operation.
Internal safety check conducted. If no light or flame is detected and all
internal conditions are correct, control enters Standby Mode.
1. Safety Period (5 seconds) internal and external check for flame or light.
If flame or light is detected, control remains in the Standby Mode.
2. When flame or light is not present:
a. R7284G will apply power to the burner motor and igniter.
b. R7284B,P,U (if valve-on delay is enabled) will apply power to the
burner motor and igniter, (if configured) enter/complete valve-on
delay period and then apply power to the valve.
3. Control enters Trial for Ignition period.
a. Monitors burner for flame.
b. When flame is not detected:
(1) Enters lockout mode (after lockout time of 15, 30, or 45 seconds).
(2) Shuts off valve, igniter and burner motor.
(3) Display models: display Lockout mode. LED models: flash LED
1/2 sec ON, 1/2 sec OFF.
(4) Depress "i" button for 2 seconds to return to power-up sequence.
c. When flame is detected, Carry-Over period begins:
4. Control enters Ignition Carry-Over period (continues to spark for 10 sec-
onds in interrupted mode).
a. Display models: display "Flame Proven." LED models: turns on LED
b. If flame is lost and lockout time has not expired, R7284 returns to
Trial for Ignition period.
c. If flame is lost and lockout time has expired, R7284 enters Recycle
Mode.
5. Carry-Over time expires; igniter turns off if interrupted ignition.
6. Enters Run Mode:
a. Flame is monitored until call for heat ends or flame is lost. If flame is
lost:
(1) Control enters Recycle Mode.
(2) Recycle time starts (60 seconds).
(3) Burner and valve are turned off.
(4) Display models: display "Recycle." LED models: flash LED 2 sec
ON, 2 sec OFF.
(5) Returns to Idle Mode at end of Recycle Mode.
1. R7284B,G,P,U (if burner motor-off delay is disabled):
a. Burner motor and optionally oil valve and igniter shut off.
b. Display models: display "Standby"
LED models: LED turns OFF
c. Indicator light turns off.
2. R7284P,U (if burner motor-off delay is enabled):
a. Oil valve shuts off.
b. Burner motor runs for selected burner motor-off delay time.
c. Burner motor turns off.
d. Device returns to Idle Mode.
1. R7284 enters Restricted Mode.
2. Indicator light flashes and 1/2 second on, 1/2 second off.
3. Display models: display "Hard Lockout Call Service"
LED models: flash LED 1/2 second ON, 1/2 second OFF
4. Reset device by pressing and holding reset button for a minimum of 10
seconds.
R7284 Action
9 69-2467EFS—09