User manual DOMETIC KRA

[. . . ] 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. [. . . ] This list contains common occurrences that are not a result of defective workmanship or materials. 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. Evacuate system and recharge with the correct amount of R-134a refrigerant. Set suction pressure and insulate TXV as described in section "Recharging the System". Fault: Fan or pump operates but compressor does not (high pressure switch or thermal overload has tripped) L-2091 Operation 11 English Possible Reason/Correction: 1. If compressor windings are good, but unit will not start, try adding a start booster. Fault: Compressor and fan (or pump) running, but box does not cool. Constant Pressure Valve (CPV) not set correctly Connect R-134a gauge set and check low side pressure. Adjust superheat following instructions in Section "Adjusting the TXV". Have technician diagnose and replace. Fault: Insufficient Cooling of Box Possible Reason/Correction: 1. Turn unit OFF, and defrost according to the "User Maintenance" section. Decide what you are going to get before opening the box, then conduct removal quickly to prevent warm air infiltration. Unit will slowly pull the heat out of the warm items, allow for recovery time. Poor seals allow ambient air to infiltrate box, bringing moisture with it. Leaving the drain plug out during regular operation allows outside air, possibly even hazardous or bilge gases, to enter box. Have a certified technician check the suction pressure, and set the valve according to the "Recharging the System" section. Have a certified technician check the suction pressure, and set the valve according to the "Recharging the System" section. If the technician finds a low charge condition, he/she should check for leaks using the UV dye system that is built into the KRA Refrigeration System or by using an electronic leak detector. Unit should be recharged to rated system capacity. Fault: Systems starts to cool, but stops as plates freeze. Evacuate unit and recharge with R-134a. Fault: Compressor operates, but seawater pump doesn't Possible Reason/Correction: 1. Check pump relay and pump relay trigger. Fault: Unit Does Not Run Possible Reason/Correction: 1. If the thermostat is showing a fault code, refer to Digital Thermostat Display Error Messages section below. If thermostat still does not send voltage to the condensing unit or if fault code is present, replace thermostat. L-2091 Operation 12 English 9. [. . . ] Sne Location: Bevazzana de Latisana (UD), Italy Territory: Northeast Italy, Austria, Croatia, Slovenia Phone: Fax: E-mail: Web: 390-431-53-644 390-431-53-460 nautica. centis@nauticacentis. it www. nauticacentis. it L-0384 Revised: 07-26-06 Parts And Power Location: Tortola, British Virgin Islands Phone: Fax: E-mail: 284-494-2830 284-494-1584 info@partsandpower. com Cay Electronics Ltd. Location: Tortola, British Virgin Islands Phone: Fax: E-mail: Web: 284-494-2400 284-494-5389 caybvi@candwbvi. net www. cayelectronics. com Parts And Power Location: Tortola, British Virgin Islands Phone: Fax: E-mail: 284-494-2830 284-494-1584 info@partsandpower. com British West Indies Caribbean Marine & Diesel Location: Turks and Caicos Islands, British West Indies Phone: Fax: E-mail: 649-941-5903 649-941-5902 caribmarinediesel@tciway. tc Reefco Location: St. Virgin Islands Phone: Fax: E-mail: 340-776-0038 340-776-0038 dennyedy@viaccess. net Centro Cruisair de Puerto Rico Location: Santurce, Puerto Rico Phone: Fax: 787-727-3637 787-727-3637 Cool-Tech Air Conditioning Location: Fajardo, Puerto Rico Phone: Fax: E-mail: (787) 860-2615 (787) 801-2050 cooltech@isppr. net Regis Electronics (St Lucia) LTD. Location: St. Lucia, West Indies Phone: Fax: E-mail: 758-452-0205 758-452-0206 stlucia@regiselectronics. com Marine Power Location: Grand Cayman Island, British West Indies Phone: Fax: E-mail: 345-947-1945 345-947-1909 mpower@candw. ky Coral Bay Marine Service Location: St. 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. [. . . ]