| Voltage and Frequency |
220-240 V AC, 50/60 Hz |
| Maximum Total Connected Load |
2000 VA |
| Flame Detection System |
Requires plug-in flame amplifier (e.g., R7847, R7848, R7849, R7861, R7886) |
| Flame Failure Response Time |
Dependent on flame amplifier (typically 0.8 to 3.0 seconds) |
| Purge Timer |
Requires ST7800A plug-in purge card (configurable durations) |
| Sequence Functions |
Automatic burner sequencing, pre-purge, ignition, flame supervision, post-purge |
| Diagnostics |
Five LEDs for sequence status, optional Keyboard Display Module (2-line VFD or 4-line LCD) for fault annunciation |
| Interlocks |
Supports limit and operating interlocks for safety integration |
| Safety Features |
Lockout on flame failure, airflow switch check, nonvolatile memory for history and status |
| Ambient Temperature Range |
-40 to 60°C |
| Mounting |
Q7800A or Q7800B Universal Wiring Subbase |
| Standards Compliance |
UL, CSA, FM, CE |