Circulating Water Systems

Question 1

1. Which should be started first, the Cooling Tower Circulating pump or the Auxiliary Circulating Water Pump? Why?

Answer 1

The aux circ pump first to back fill the condenser and main circulating lines and to prevent damaging the condenser.

Question 2

2. What should you watch when starting a Cooling tower circulating water pump?

Answer 2

Graphic of Circ pump, NAC, Amps, Discharge valve open, VARS, and Cooling tower level.

Question 3

3. What are the Var limits when adjusting the vars on a Cooling Tower Circulating water Pump?

Answer 3

After 1 hour of starting a pump VARS need to be adjusted to zero. The pump will trip if VARS get over 100 out

Question 4

4. What is the purpose of the Aux. Cooling Water Surge tank?

Answer 4

To provide head pressure to the ACW system pumps and surge protection

Question 5

5. What precautions should you take when starting the first Aux. Cooling water pump?

Answer 5

Use the Discharge bypass to fill the system to prevent and hammering, and if initially filling system use your high bleed points in the system to remove trapped air.