Seakeeper 2 Installation Manual (90488-4); S/N 2-232-1564 to Current
4.2 Installation Considerations
- The installer is responsible for supplying a dedicated seawater pump and associated plumbing. An optional seawater pump can be purchased through Seakeeper, P/N 30331.
- Seawater connections on the Seakeeper heat exchanger mate with ¾ in. (19 mm) hose.
- The seawater pump is powered via the “SW Pump 12 VDC Out” connection on the Seakeeper 2 wire harness, as outlined in Electrical Installation Section.
- The seawater pump operates on 12 VDC with a max overcurrent protection rating of 15 A.
- A dedicated through-hull fitting should be installed for each Seakeeper unit onboard the vessel to ensure sufficient seawater flow to each unit.
- It is recommended that the seawater pump is located below the waterline, as close to the baseline of the vessel as practically possible, to maintain positive inlet pressure on the pump in all operating conditions.
- A self-priming seawater pump may be required to maintain water flow in all underway conditions. Cavitation can occur at the seawater inlet and potentially cause an air-lock condition restricting seawater flow to the heat exchanger.
- Maximum allowed seawater pressure in heat exchanger is 20 psi (1.4 bar)
- Seawater flow requirement through heat exchanger is 2 GPM (7.6 LPM) minimum and 6 GPM (22.7 LPM) maximum under all operating conditions of the boat. When sizing seawater pump, installer should factor in losses for raw water plumbing. In addition to initial operation at dock, new Seakeeper installations should be checked to be within the flow requirements while vessel is at speed. Flows higher than 6 GPM (22.7 LPM) could affect heat exchanger life.