Condensate Iron Prefilter Sys (CFS) Flashcards
What is the power supply to the Air Compressor
US-8
How do the condensate Iron Prefilters valves fail?
Fail, AS IS.
What does the Backwash Reveiver Tank Pump trip on?
Low discharge flow
(60 gpm w/ 10 sec TD)
What is the purpose of the Condensate Iron Prefilter System?
Provides removal of suspended solids, particularly iron, so as to effectively eliminate the solids loading on the downstream Cond Demins
What is the function of the CFS Air Compressor?
Supplies air to receiver, supports backwash (175 psig)
(cooled by CCS)
What is the backup air supply for the iron prefilter system?
Service Air
What happens to prefilter inlet/outlet and backwash header valves on a loss of air, general power, or PLC?
All prefilter system inlet and outlet valves along with the backwash header isolation valve fail as-is
What happens to Prefilter Backwash Valves, Backwash Header Vent Valve and BWRT discharge valve on a loss of air, general power, or PLC?
Fail Closed
What happens when an “INCOMPLETE BACKWASH” alarm is generated?
The entire backwash sequence must be re-initiated
What does the phase separator transfer pump trip on?
9%
What kind of water is used for a backwash?
High Velocity Water
What BWRT level is the Backwash sequence aborted?
High-High level alarm
What must be done if the prefilter d/p goes above 10 psid?
The Backwash Air Permissive Setpoint must be reset to 140 psig to prevent possible damage to the filter septa.
How long is the phase separator tank recirced?
30-55min
What is MAX d/p across a prefilter?
10 psid
What step can the backwash cycle NOT proceed beyond with a HIGH BWRT level indication in?
PRESSURIZE step
