User manual DOMETIC KRA
DON'T FORGET : ALWAYS READ THE USER GUIDE BEFORE BUYING !!!
If this document matches the user guide, instructions manual or user manual, feature sets, schematics you are looking for, download it now. Diplodocs provides you a fast and easy access to the user manual DOMETIC KRA. We hope that this DOMETIC KRA user guide will be useful to you.
Manual abstract: user guide DOMETIC KRA
Detailed instructions for use are in the User's Guide.
[. . . ] 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. [. . . ]
DISCLAIMER TO DOWNLOAD THE USER GUIDE DOMETIC KRA
Click on "Download the user Manual" at the end of this Contract if you accept its terms, the downloading of the manual DOMETIC KRA will begin.