For best results when printing this document, choose LANDSCAPE formatting from your Print Set-Up Options.
Sea Water Pumps
* Add a 'Z' to the model number to
indicate 230 volts.
|Installation Guidelines for Sea Water Pumps|
choosing the proper model Sea Water Pump, primary
consideration should be given to the BTU capacity of the condensing unit(s)
and the available power supply.
All centrifugal pumps must be located as far below the water line, and as close to the center line as possible. this prevents exposure above the water line when the vessel is on the plane or operating in heavy seas. Install the pump as close as possible to the sea water strainer and thru-hull fitting. Mount the pump securely in a horizontal position with the discharge higher than the intake. Rotate pump head towards the direction of water flow. All of the above helps to prevent any air locks that can cause the pump to cease proper operation and cause premature damage to the components.
The entire sea water system should be plumbed on a continuous uphill incline from the thru-hull intake to the condenser coil inlet.
Locate the overboard discharge above the water line and connect it to the condenser coil outlet. ?The unit condenser coil should be the high point of the application, thus eliminating a place to trap air and maintaining a self-purging system.
The thru-hull fitting should have a calm shell type scoop, facing forward, to help maintain a constant water flow to the pump. the thru-hull fitting and sea water strainer must be equal in size to the intake opening of the pump. Restriction of flow capacity to the pump intake can result in damage to the pump components.
thru-hull fitting should be dedicated to the system and not shared with
other components or systems. The sea water strainer should be of adequate
size and should be located in an accessible area for maintenance
A shut-off valve (ball-type is recommended) must be installed between the thru-hull and strainer to provide a means to service any component below the water line.
All sea water components should be assembled using properly sized flexible reinforced hose to provide vibration isolation. Securely fasten each hose run, making sure no kinks or loops exist. Avoid or minimize 90° elbow fittings to ensure maximum water flow. All hose connections must be double-clamped, reversing the clamps, above the water line as well as below it.
When installing multiple units, a single pump is recommended. Size the pump to the equivalent foot of head and the total BTU load of all units combined. The discharge of the pump is to be connected to a manifold for proper distribution of water flow to each individual unit. For independent control of the sea water pump from each unit, use a pump relay panel.
|Home | Self Contained | Central Systems | Manuals|
Water | Refrigeration | Accessories