Fireye 57YB4‐5000 Tester, for use with BurnerLogix YB control

57YB4‐5000 Tester, 120 VAC, for use with BurnerLogix YB control. Fireye® Test Unit type 57YB4 provides a simple convenient means for field testing the Fireye BurnerLogix with components, and “Y” controls. When a Fireye control chassis is plugged into the tester, a complete burner firing operation can be simulated and checked through the use of switches and indicating lights on the panel.