The Honeywell R7847A1025 are solid state plug-in amplifiers that respond to flame detector inputs to indicate the presence of flame. They are used with Primary Safety Control 7800 SERIES relay modules.

Compatible with existing Honeywell flame detectors (order separately).
Use With Flame Sensor; Gas: Rectifying Flame Rods C7004, C7005, C7007, C7008, C7009, Q179 .

The flame failure response time is 0.8 -1.0 seconds or 0.8 -3.0 seconds - this varies depending on relay selection. Contact Teltherm should you require technical assistance.
Use with Flame Rods or photocells.

Features include;
Flame failure response time of 0.8 or 3.0 seconds.
Flame signal strength ranges from 0.0 to 5.0 Vdc.
Plug into 7800 relay module through printed circuit board edge connector keyed for proper orientation.
Flame signal test jacks to measure amplifier flame signal voltage.
Colour-coded labels identify flame detection type. Dynamic Self-Check Amplifier test the detectors and all electronic components in the flame detection system 7800 SERIES relay module locks out on safety shutdown with flame detection system failure.

See pdf attached for specifications