EDG Room Ventilation System

Question 1

Each EDG Room Ventilation System consists of:

Answer 1

• A supply Fan (HVS-5 [B] and HVS-6[A])
• An exhaust fan (HVE-17[B] and HVE-18[A])
• An evaporative Air Cooling (EAC) unit
• Associated dampers

Question 2

EDG Room Fans
Power supplies
(HVS-5 and HVS-6)
(HVE-17 and HVE-18)

Answer 2

• Power supplies
  - HVS-6, HVE-18 (EDG-A) by MCC-5
  - HVS-5 , HVE-17 (EDG-B) by MCC-6

Question 3

When starting EDG Room Ventilation manually:

Answer 3

• Must start supply fans before exhaust fans. (Prevents an unmonitored release)
• Opposite for stopping.

Question 4

Auto starts

Answer 4

At 810 rpm (ERR engine run relay)