Connecting Seawater to Heat Exchanger

Refer to Figure 3 for typical seawater plumbing arrangement.

1. Connect seawater pump to Seakeeper dedicated through-hull fitting. A strainer and seacock valve should generally be installed between the seawater inlet and the pump.
2. Connect seawater from installer-supplied seawater pump to lower ½ in. (13 mm) hose barb on heat exchanger.
   1. Use the same practices as other below waterline seawater plumbing.
3. Connect seawater discharge (upper hose barb) to overboard drain. Use the same practices as other below waterline seawater plumbing.
4. During commissioning, seawater flow should be checked to be within the flow requirements while the vessel is at rest, at speed, and when backing down.
   1. If no other method of confirming flow is available, discharge line may be temporarily diverted to a bucket. Flowrate is calculated based on the time required to fill a known volume in GPM / LPM.
   2. Flowrates in excess of 4 GPM (15.2 LPM) could affect heat exchanger life.
5. After sea trial / commissioning, inspect all raw water plumbing for any signs of leakage.