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INSTALLATION - SEAWATER SYSTEM
Several guidelines should be followed during the installation of the seawater system. If the circulation pump is
centrifugal and not self-priming, it must be mounted so that it is always at least one foot below the water line
regardless of which tack the vessel is on. Pump may be mounted horizontally or vertically, however the discharge
must always be above the inlet. Pump head should be rotated toward the direction of water flow
Install the seawater scoop intake facing bow and as far below the water line and as close to the keel as possible
in any application, but especially on a sailboat. The seawater scoop must remain in the water under all conditions
or air will get into the pump. Turn air conditioner off in rough seas.
NOTE: The seawater scoop intake must face forward and not be shared with any other pump.
A seawater strainer is mandatory between the shut off valve (seacock) and the pump to protect the pump from
any foreign matter. Failure to install a seawater strainer will void the pump and unit warranty.
The seawater system should be installed with an upward incline from the seawater scoop and seacock, through
the strainer, to the inlet of the pump and then up to the inlet of the A/C unit's condenser coil. The discharge from
the Mabru A/C unit should then run to the seawater outlet thru-hull fitting which should be located where it can be
visually checked for water flow and as close as practicable to the waterline to reduce noise. All hose connections
shall be secured by means of two double/reversed stainless steel hose clamps. Use Marine sealant on all thread-
ed connections.
+1 888 818 2814
support@mabrumarine.com
Page No.9
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