
10 PFC2000-4000 Boiler I,O&M Manual Rev. 2
IV. PFC COMPONENT IDENTIFICATION
1. Communicaon Interface (Honeywell S7999D
Display)
2. Main appliance control
3. Control box
4. ON/OFF switch
5. Main gas valve
6. Blower
7. BluejetRburner
8. Ignion electrode
9. Flame observaon port
10. Thermal fuse
0F,
11. High gas pressure switch
12. Low gas pressure switch
13. Outlet/Supply water connecon
14. Water ow switch
24
15. Gas supply line
pipe sizes.
16. Inlet/Return water connecon
sizes.
17. Supply/outlet water temperature sensor
18. Return/Inlet water temperature sensor
19. Low water cut o probe and reset box
20. Temperature and pressure gauge
readings.
21. Pressure relief valve
all models.
22. Condensate drain trap
drain line.
23. Minimum combuson air proving switch
24. Blocked vent switch
vent piping.
25. Combuson air lter box
26. Exhaust vent connecon
27. Heat exchanger