SEQUENCE OF OPERATION
1. SYSTEM SWITCH “MANUAL” HEAT SWITCH “LOW FIRE”
After a ninety second purge period, the burner fires on low fire. Thirty seconds after the burner fires the
supply fan starts. when the call for heat from the thermostat is satisfied the burner shuts down and after a
three minute cool down period the supply fan shuts down.
2. SYSTEM SWITCH “MANUAL” HEAT SWITCH “HIGH FIRE”
After a ninety second purge period, the burner fires on high fire. Thirty seconds after the burner fires the
supply fan starts. when the call for heat from the thermostat is satisfied the burner shuts down and after a
three minute cool down period the supply fan shuts down.
3. SYSTEM SWITCH “THERMOSTAT” (the Heat Switch is inoperative in this mode)
On a call for first stage heat from the thermostat, after a ninety second purge period, the burner fires on
low fire. Thirty seconds after the burner fires the supply fan starts. On a call for second stage heat from
the thermostat the burner goes to high fire. When the call for heat from the thermostat is satisfied the
burner and supply fan shut down.
4. SYSTEM SWITCH “OFF”
The heater is inoperative.
NOTES:
- When the “VENTILATION SWITCH” is in the “ON” position the supply fan will run continuously.
- When the system switch is turned off the supply fan will continue to run for three minutes to cool down
the heat exchanger
- Do not shut down the heater by disconnecting the power supply to the heater as this could damage the
heater. To shut down the heater turn the SYSTEM SWITCH to the “OFF” position and wait for the three
minute cool down cycle to complete before disconnecting the power supply.
SEQUENCE OF OPERATION
BECKETT GENISYS 7505
Burner States
1. Standby: The burner is idle, waiting for a call for heat.
2. Valve-on Delay: The igniter and motor are on while the control delays turning on the oil solenoid valve
for the programmed time (45 seconds).
3. Trial for ignition: The oil solenoid valve is energized. A flame should be established within the factory
set trial for ignition time (”lockout time”).
4. Lockout: The control has shut down for one of the following safety reasons:
a. The trial for ignition (lockout) time expired without flame being established
b. The cad cell detected flame at the end of the Valve on Delay state.
To reset the control from lockout click the button 1-second.
NOTE: A recurrence of the above failure modes or a failed welded relay check could cause the control to
enter a Hard Lockout state that must be reset only by a qualified service technician.
To reset from Hard Lockout, hold the reset button for 15 seconds until the yellow light turns on.
5. Ignition Carryover: Once flame is established, the igniter remains on for 10 additional seconds to
ensure flame stability.
6. Run: The flame is sustained until the call for heat is satisfied. The burner is then sent to Motor-Off
Delay, if applicable, or it is shut down and sent to Standby.
7. Recycle: If the flame is lost while the burner is firing, the control shuts down the burner, enters a 60
second recycle delay, and repeats the ignition sequence. The control will continue to Recycle each time
the flame is lost, until it reaches a pre-set time allotment. The control will then go into a Hard Lockout
instead of recycle. This feature prevents excessive accumulation of oil in the appliance firing chamber.
8. Motor-Off Delay: If applicable, the oil solenoid valve is turned off and the control delays turning the
motor off for the set motor-off delay time before the control returns to standby.
9. Pump Prime: The igniter and motor are on with the oil solenoid valve energized for 4 minutes. During
Pump Prime mode, the cad cell is disregarded, allowing the technician to prime the pump without having
to jumper the cad cell.
17
Summary of Contents for IHS 1500
Page 25: ...IHS 1500 Wiring Panel 24 ...
Page 26: ...25 REPLACEMENT PARTS ...
Page 27: ...26 18 19 20 21 REPLACEMENT PARTS ...