INSTALLATION
MANUAL
Section 3: COOLING INSTALLATION
3.1 Precautions
• Installer is responsible for supplying a dedicated sea water pump and associated plumbing. Sea
water connections on the gyro heat exchanger mate with ¾ inch (19 mm) hose.
• There is no need to disconnect hose from glycol pump except to replace the pump. In this case,
provision will need to be made to catch draining glycol as plumbing is disconnected. Use caution
to avoid breaking plastic hose connections on pump casing.
• An output is available from motor drive to power and automatically control seawater pump.
This pump must operate on 230 VAC single phase and consume less than 5 amps. Pumps
requiring other voltages or higher current can still be controlled by using this supply from motor
drive to trigger an installer-supplied contactor but a separate source of power must be provided.
• Maximum sea water pressure in heat exchanger is 20 psi (1.4 bar)
• Seawater flow requirement through heat exchanger is 4 GPM (15.1 LPM) minimum and 8 GPM
(30.3 LPM) maximum under all operating conditions of the boat. When sizing sea water pump,
installer should factor in losses for raw water plumbing. In addition to initial operation at dock,
new gyro installations should be checked to be within the flow requirements while vessel is at
speed. Flows higher than 8 GPM (30.3 LPM) could affect heat exchanger life.
3.2 Adding Coolant
1) Cooling system is filled to proper level when
shipped, with a mixture of 50% ethylene glycol
and 50% distilled water. Clear tube between
thermostat housing and reservoir should be
filled with green coolant mixture. If level has
dropped, check for evidence of leaks at all
connections before adding fluid as described
below. If coolant is at the correct level, skip to
sea water connection in section 3.3.
FIGURE 3 – SEAKEEPER 26 COOLANT LEVEL
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