User manual DOMETIC L-2091

[. . . ] KRA Refrigeration Systems INSTALLATION · OPERATION Refrigeration Systems Revised: 8-08-06 L-2091 English Part Number: LP-17 Table of Contents Refrigeration Systems · Introduction Drawings and Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Refrigeration Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Refrigerator/Freezer Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Refrigeration Systems · Installation Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Installing the Refrigeration Unit 5 Condensing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Constant Pressure Valve (CPV) and Linesets . . . . . . . . . . . . . . . . . . . . . 5 Thermostatic Expansion Valve (TXV) Placement . . . . . . . . . . . . . . . . 6 Dual Box Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Quick-Connect Fittings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Sight Glass/Moisture Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thermostat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Refrigeration Systems · Operation KRA Refrigeration Start-Up Check List Servicing Your Refrigeration System 8 9 Thermostat Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 R-134a Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Constant Pressure Valve (CPV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Thermostatic Expansion Valve (TXV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Quick-Connect Fittings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Recharging the System 9 System Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Evacuate Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Charging the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Setting the CPV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Adjusting the TXV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Setting the Thermostat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Sight Glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Metering Device Replacement 11 CPV Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 TXV Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 User Maintenance 11 Seawater System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Defrosting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Winterizing the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Troubleshooting Guide BTU Guide - Refrigeration Loss/Gain Specs Owner's Limited Warranty Limited Warranty Periods Description of Figures Cruisair Worldwide Service Dealer Locator 11 13 15 17 18 33 L-2091 2 English Refrigeration Systems · Introduction Warning This manual contains essential safety information concerning the safe and proper installation, operation and maintenance of your refrigeration system. It is very important that you read and understand the contents of this manual thoroughly before using the equipment, and you should keep it on your boat for future reference. Failure to follow company approved installation procedures, and start-up and troubleshooting procedures will void the warranty. If there are any statements in this manual that you do not understand, contact the Dometic Service Department or your local dealer for assistance. [. . . ] Often small blockages can be cleared by turning the adjustment knob in and out a few times. In the unlikely event that the CPV is blocked or the diaphragm ruptured, it can be replaced as follows: 1. Recover R-134a refrigerant per EPA regulations. Remove CPV from evaporator at quick disconnect fitting. Remove the liquid line (1/4" bare copper tube) from CPV body by removing the flare nut. The flare nut has thread locking compound on it and may require some extra force to loosen. We recommend using threadlock on the 1/4" flare threads. Be careful not to over-tighten quick connect fittings. Check that the body of the fitting is tight to the tube adapter. On the one-piece quick connects, tighten to 10-12 ft lbs. Evacuate system and recharge with the correct amount of R-134a refrigerant. Set suction pressure and insulate CPV as described in section "Recharging the System". Defrosting Defrosting of your freezer box is required to keep the unit working at peak performance. Defrost the unit whenever more than 1/4" of ice or frost has accumulated on the plates or box sides. To defrost, remove all refrigerated items, and then disconnect the power to the freezer unit. Leave unit off until all ice has melted. Be sure to replace drain plug once unit has finished defrosting, if applicable. Winterizing the System Make sure all water has drained from the refrigerated box. On seawater cooled units, close the seacock, and remove inlet hose from pump and outlet hose from unit to allow all water to drain from the system. Drain and clean seawater strainer. Troubleshooting Guide Before you call for service, review this list. This list contains common occurrences that are not a result of defective workmanship or materials. If you need service after trying these procedures, call your dealer. Note that wiring diagrams for all units are in Figures 7-12. Fault: Compressor and fan (or pump) does not run Possible Reason/Correction: 1. Set for a cooler setting. TXV Replacement If the TXV needs to be replaced, review section "Thermostatic Expansion Valve (TXV) Placement", and follow this procedure: 1. [. . . ] Virgin Islands Phone: Fax: E-mail: 340-773-0289 340-778-8974 stcroixmarine@hotmail. com Canada British Columbia Accutemp Refrigeration and Air Conditioning Location: Victoria, BC, Canada Territory: Western Canada Phone: Fax: E-mail: Web: 250-475-2665 250-475-1957 info@accutemp. ca www. accutemp. ca Dr. Thomas, US Virgin Islands Territory: St. Thomas Phone: Fax: E-mail: 340-513-9072 340-775-6576 davidgott@hotmail. com; Sun Cool Air Conditioning Corp Location: Carolina, Puerto Rico Phone: Fax: E-mail: 787-791-6971 787-791-3885 suncool1@coqui. net Freezing Point, Ltd. Location: Nassau, Bahamas Phone: Fax: E-mail: 242-325-3589 242-356-5271 freezingpoint@bahamas. net. bs Technical House (E. T. S. Inc. ) Location: San Juan, Puerto Rico Territory: Sentry Battery Chargers Only Phone: Fax: E-mail: Web: 787-781-1313 787-781-2020 jdonato@technicalhouse. com www. technicalhouse. com Airon Heating And Air Conditioning Location: Richmond, BC, Canada Territory: Western Canada Phone: Fax: E-mail: Web: 604-270-2040 604-270-3888 dmairon@telus. net www. aironhvac. com Frostline Location: , St. [. . . ]