The Beckett models AF & AFG burner are designed to meet the increased demands of modern equipment and changing fuels to meet both ...
7590D Sequence of Operation
This quick tutorial will guide you through the steps on the sequence of operation for the 7590D Control on the CG4 Burner. Click each image to view larger.
Notice
This operation sequence is typical for operation with a 7590 control. This is the only control approved for use on the CG4 Gas Power Burner.
Call for heat, Control performs safe-start check. If safe-start fails, control locks out.
If the air proving switch is open, the motor will start.
Once the air proving switch closes, pre-purge will begin (lasting 30 seconds). Pre-purge or ignition timings will not start until the air proving switch closes.
When pre-purge is completed, the control turns on the igniter and the gas valve. MV LED will turn on.Spark continues until end of ignition timing or until flame is proved.
Once flame is proved, The Flame LED is turned on and the spark is turned off. The gas valve and MV LED remain energized.
When the call for heat is ended, the gas valve, MV LED, Flame LED, Status LED and motor turn off.
Quick Status Check | Quick Reference
7590D Configuration for CG4 Burner
| Configuration Item | Range | Standard for CG4 | Factory Locked? |
|---|---|---|---|
| Separate Flame Rod | None | ||
| BTU Range | Under 400,000 BTUs | ||
| Number of Trials for Ignition | 1 to 4 | 3 | Yes |
| Trial for Ignition Timing | 4-15 secs | 4 secs | Yes |
| Pre-purge Timing | 1 sec – 4 min | 30 secs | Yes |
| Inter-purge Timing (between trials for ignition) | 90 – 300 Secs | 90 secs | Yes |
| Relight or Recycle on Flame Loss | Relight or Recycle | Recycle | Yes |
| Maximum Number of Flame Losses Allowed During a Single Call for Heat | 1-254 or Infinite | 3 | Yes |
| Maximum Number of Pressure Switch Losses Allowed During a Single Call for Heat | 1-254 or Infinite | 30 | Yes |
| Waiting Time for Pressure Switch to Open (if stuck in closed position) on Call for Heat (Start Up) (control locks out if switch has not opened at the end of timing) (motor off) | 10 – 240 secs | 60 secs | Yes |
| Waiting Time for Pressure Switch to Close Once Burner Motor Has Started (control locks out if switch has not closed at the end of timing) (motor on) | 10 – 240 secs | 30 secs | Yes |
| Flame Signal Minimum Strength for Strong LED Indication | 0-10μ | 1μ | NA |
| Operating Hours to Lock Field Setting (field settings cannot be changed after this timing expires) | 0 -255 hours | NA | |
| Auto Retry Time (following a soft lockout) | 1- 8 hours or none | 4 hours | Yes |
| Purge Prior to Lockout | 0 secs to 4 min | 15 seconds | Yes |
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