{"id":21475,"date":"2026-06-15T16:02:24","date_gmt":"2026-06-15T16:02:24","guid":{"rendered":"https:\/\/manuals.seakeeper.com\/seakeeper\/seakeeper-4-4-5-installation-manual-90762-1-copy\/4-0-cooling-installation\/4-3-connecting-seawater-to-heat-exchanger\/"},"modified":"2026-07-15T11:56:24","modified_gmt":"2026-07-15T11:56:24","slug":"4-3-connecting-seawater-to-heat-exchanger","status":"publish","type":"page","link":"https:\/\/manuals.seakeeper.com\/seakeeper\/seakeeper-5-installation-manual\/4-0-cooling-installation\/4-3-connecting-seawater-to-heat-exchanger\/","title":{"rendered":"4.3 Connecting Seawater to Heat Exchanger"},"content":{"rendered":"\n

Refer to the figure below or Seakeeper<\/span> 5 Cooling Water Schematic for typical plumbing arrangement.<\/p>\n\n\n

\n
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Typical Seawater Plumbing Arrangement<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n
\n\n\n\n

Connecting Seawater to Heat Exchanger<\/h3>\n\n\n\n
    \n
  1. Connect seawater pump to Seakeeper<\/span><\/span> dedicated through-hull fitting. A strainer and seacock valve should generally be installed between the seawater inlet and the pump.<\/li>\n\n\n\n
  2. Connect seawater from installer-supplied pump to lower \u00be in. (19 mm) hose barb on heat exchanger. Use the same practices as other below waterline seawater plumbing. Required flow rate is 2 GPM (7.5 LPM) minimum and 4 GPM (15.1 LPM) maximum.<\/li>\n\n\n\n
  3. Connect seawater discharge (upper hose barb) to overboard drain. Use the same practices as other below waterline seawater plumbing.<\/li>\n\n\n\n
  4. In addition to initial operation at dock, new installations should be checked for minimum 2 GPM (7.5 LPM) flow while vessel is at speed and when backing down.
    \n
      \n
    • If no other method of confirming flow is available, discharge line may be temporarily diverted to a bucket. Flow is calculated from time to fill a known volume.<\/li>\n\n\n\n
    • A self-priming seawater pump (customer\/installer supplied) may be required due to installation location to maintain water flow in all underway conditions where cavitation may occur and potentially cause an air-lock condition restricting seawater flow to the heat exchanger.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • Inspect raw water plumbing after sea trial for any signs of leakage.<\/li>\n\n\n\n
    • Heat exchanger contains removable end-caps to provide access for cleaning the tube bundle.<\/li>\n<\/ol>\n\n\n\n
      \n\n\n\n

      Seakeeper<\/span> Optional DC Seawater Pump (P\/N 30331)<\/h3>\n\n\n\n

      Seakeeper<\/span> offers a self-priming DC Seawater pump as an optional addition, P\/N 30331\u2013DC Seawater Pump Assembly, shown below. The Seakeeper<\/span> Seawater Pump is a 24 VDC pump operated at 12 VDC for the
      Seakeeper<\/span>. The pump assembly is pre-wired for connection to Seakeeper<\/span> Seawater Pump Output Cable and includes a seawater strainer and various fittings. The pump specifications are as follows:<\/p>\n\n\n\n

      NOTE: Use only SeaFlo-provided threaded fittings for DC Seawater Pump 30331.<\/strong><\/p>\n\n\n\n

      Voltage<\/td>24 VDC (Operate at 12 V for Seakeeper<\/span> 4 and 4.5)<\/td><\/tr>
      Rated Flow<\/td>2.5 – 4 GPM (9.5 – 15.1 LPM)<\/td><\/tr>
      Overcurrent Protection Rating<\/td>15 A<\/td><\/tr>
      Ignition Protection<\/td>ISO 8846 or equivalent<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n
      \n
      \"\"
      DC Seawater Pump (P\/N 30331)<\/em><\/figcaption><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"

      Refer to the figure below or Seakeeper 5 Cooling Water Schematic for typical plumbing arrangement. Connecting Seawater to Heat Exchanger Seakeeper Optional DC Seawater Pump (P\/N 30331) Seakeeper offers a self-priming DC Seawater pump as an optional addition, P\/N 30331\u2013DC Seawater Pump Assembly, shown below. The Seakeeper Seawater Pump is a 24 VDC pump operated […]<\/p>\n","protected":false},"author":9,"featured_media":0,"parent":21469,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"manual":[375],"model":[],"document_type":[],"hidden":[],"class_list":["post-21475","page","type-page","status-publish","hentry","manual-seakeeper-5-installation-manual"],"acf":[],"_links":{"self":[{"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages\/21475","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/comments?post=21475"}],"version-history":[{"count":5,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages\/21475\/revisions"}],"predecessor-version":[{"id":21802,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages\/21475\/revisions\/21802"}],"up":[{"embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages\/21469"}],"wp:attachment":[{"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/media?parent=21475"}],"wp:term":[{"taxonomy":"manual","embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/manual?post=21475"},{"taxonomy":"model","embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/model?post=21475"},{"taxonomy":"document_type","embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/document_type?post=21475"},{"taxonomy":"hidden","embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/hidden?post=21475"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}