User manual DOMETIC L-2058

[. . . ] polar mate Installation & Operation Grunert Refrigeration Systems Revised: 9-29-03 L-2058 TABLE OF CONTENTS Introduction Drawings and Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Installation Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Tools & Materials Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The 5/8" reinforced hose used to plumb the system should be on an uphill grade from the intake thru hull, the sea cock, the seawater strainer, the pump, and then to the condensing unit in that order. By maintaining this upward slope, any air entering the thru hull will be able to travel unobstructed up and through the pump. If loops or traps are left in the circuit, the pump may become air-locked, causing poor performance, shutting down the system or causing component failure. The use of a forward facing clam shell scoop is mandatory to overcome the suction pressure (siphon effect) occurring when the boat is moving through the water. Install the seawater speed scoop intake as far below the water line and as close to the keel as possible in any application, but especially on a sail boat, to keep the intake in the water when the boat heels over so that air does not get into the system. Sharing a thru hull for the pump circuit is not recommended because of the pump's tendency to pull both air and water out of the second circuit, and subsequently losing its prime. NOTE: A pump on/off switch should be used with an air/ water cooled unit to turn the pump off while still using the refrigeration system air cooled condenser when the boat is hauled in dry dock. For quiet vibration free operation, the pump assembly should be mounted to a solid surface. The mounting position of the pump should always be horizontal, with the discharge outlet oriented at the top of the wet end assembly. The Boat DC Electrical System A minimum of 100 amp hours of additional battery capacity should be provided for the refrigeration system, and more when cruising offshore for extended periods. Without this additional capacity, batteries may have to be recharged more than once a day. Deep cycle batteries are highly recommended because they are specifically designed for long life under deep discharge and cycling operations. A minimum of two batteries, one for engine starting and the other for the house, is required. As batteries age, their peak voltage lowers and they discharge quicker. This, of course, can affect refrigerator performance as well as other DC devices. The battery condition should be maintained and monitored regularly and weak batteries should be replaced. 7 L-2058 Installation English A battery isolator or selector switch between any two batteries will allow simultaneous charging while preventing the discharge of a fully charged battery into a depleted one. Insure that all DC electrical connections are made in compliance with ABYC standards section E-9. Call ABYC at (410) 956-1050. DC Electrical Wiring The DC motor in the compressor runs by electronic commutation. Due to this design, it is necessary for the current to travel freely between the unit and battery. The unit should be connected directly to the battery selector switch terminals. AC or DC converters, generators, etc. ) between the control unit, the selector switch, and the battery. Any deviation from this procedure could damage the compressor or the control module and would not be covered under the warranty policy in the back of the manual. When connecting the electronic control module to the battery selector switch, maintain correct wire size as shown in the table below, keep wire runs as short as possible to avoid unnecessary resistance or voltage drop. [. . . ] Components comprising a complete system or a new installation are covered by a limited one (1) year warranty from date of installation, but not to exceed two (2) years from date of manufacture. Labor costs are covered for six (6) months from the date of installation. OEM installed systems are warranted for a period of one (1) year from the date of sale of the vessel, not to exceed two (2) years from the date of manufacture. Warranty will be paid in accordance with our established schedule of allowances. [. . . ]