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DX Built-In Air Cooled A/C Systems
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INSTALLATION • OPERATION 2
Distributed By:
P.O. Box 430
Milford, VA 22514
Phone (804) 633-9454
FAX (804) 633-5499
DIRECT EXPANSION SYSTEMS
Dometic Corporation
2000 N. Andrews Ave. Ext. • Pompano Beach, FL 33069-1497 USA
Phone: 954-973-2477 • Fax: 954-979-4414
Website: www.dometic.com/marine • Email: sales@dometicusa.com
For LP-10A
Revised: 20140404
L-0261
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Summary of Contents for Cruisair DX
- Page 1 DX Built-In Air Cooled A/C Systems INSTALLATION • OPERATION 2 Distributed By: P.O. Box 430 Milford, VA 22514 Phone (804) 633-9454 FAX (804) 633-5499 DIRECT EXPANSION SYSTEMS Dometic Corporation 2000 N. Andrews Ave. Ext. • Pompano Beach, FL 33069-1497 USA Phone: 954-973-2477 •...
- Page 2 1992, United States federal law prohibits the intentional release of refrigerant gases into the environment, including the R-22 refrigerant used in Cruisair air conditioning systems. Special care must be taken when installing, charging and servicing Cruisair equipment to prevent any loss of refrigerant.
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Page 3: Table Of Contents
Table of Contents Chapter 1: Description of Basic Components ...................4 Basic Principles ..........................4 Cooling Unit ............................4 Controls/Switches ...........................4 Condensing Unit ..........................4 Figure 1. SA 3 Series Control......................4 Figure 2. SMX Series Keypad ......................4 Chapter 2: Installation of Basic Components ....................5 Cooling Unit ............................6 Control or Switch Assembly ......................6 Condensing Unit ..........................6... -
Page 4: Chapter 1: Description Of Basic Components
20 user programmable functions. These describe and explain the function of the basic functions are described in the SMX series parts of a Cruisair system and will outline the owner’s manuals. Figure 2 shows an SMXII installation, interconnection and startup of a control panel. -
Page 5: Chapter 2: Installation Of Basic Components
EBS, EBO, EHBO, EBL in their proper sequence, when installing or EHBL, should be mounted low, near the Cruisair equipment. Read and understand the return air grill, and the discharge air ducted to instructions in this manual before proceeding. -
Page 6: Cooling Unit
Condensing Unit can be removed and cleaned easily. The filter material should be a type which will not cause Cruisair condensing units are designed to a significant inlet air flow pressure drop. For be installed in a compartment ventilated to all discharge air applications, wood or plastic the outside. -
Page 7: Installation Kit
Only the long stem forged flare nuts, such as rubber or any other type hose not de- those that are supplied with Cruisair equipment, signed specifically for use with R-22 and are strong enough for mobile duty. Do not use long approved by Cruisair. -
Page 8: Figure 5. Refrigerant Line Sizes
Air Conditioning System Air Conditioning System with (1) Cooling Unit with (2) Cooling Units & (1) Condensing Unit & (1) Condensing Unit Cooling Unit Line Sizes Suction Lines Unit Cap Suction Discharge Unit Cap Line Size 4000 BTU - 3/8” 1/4”... -
Page 9: Chapter 3: Start-Up Procedures - Final Inspection
CHAPTER 3: Start Up Procedures - Final Inspection The following is a list of items to be checked 14,000 BTU/hr Condensing Unit before any Cruisair system is started. Be sure that the: Voltage Wire size p Cooling unit is bolted securely in place. -
Page 10: Chapter 4: Start-Up Procedures - Initial Charging Of A New System
If any vacuum is lost, a There are three refrigerant circuit components leak is indicated. Find the source of the leak in a Cruisair remote condensing unit system: the and correct. Return to step #3 above and condensing unit, the cooling/heating unit and re-evacuate the system. -
Page 11: Field Charging A System
6. Start the unit and observe the system Field Charging A System pressures. Use the Cruisair charging pressure To field charge a new system which has charts, Figure 7a or 7b to determine the been evacuated and initially charged or an older proper pressures. -
Page 12: Cooling Cycle
Cooling Cycle Equipment Built in 1994 and After IMPORTANT To determine desired pressures, exact inside and outside temperatures must be measured. Suction Indoor Pressure Temp. (PSIG) (F°) Outdoor Air (F°) Head Pressure Indoor (PSIG) Temp. (F°) Outdoor Air (F°) Figure 7a. Charging Pressure Charts... - Page 13 Cooling Cycle Equipment Built Prior To 1994 IMPORTANT To determine desired pressures, exact inside and outside temperatures must be measured. Suction Pressure (PSIG) Indoor Temp. (F°) Outdoor Air (F°) Indoor Head Pressure Temp. (PSIG) (F°) Outdoor Air (F°) Figure 7b. Charging Pressure Charts...
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Page 14: Chapter 5: Start-Up Procedures - Final Check-Out And Start-Up
(above 95° F / 35° C), control panel/switch assembly, following the and heating capacity decreases when outside directions in the Cruisair owner’s manual. air temperature drops below 40° F / 4° C. p A llow unit to run for 15 minutes, then check the... -
Page 15: Chapter 6: General Operation
Rotary Knobs until the living area is cooled or heated to the desired temperature. At this point, turn the ther- Before attempting to start the Cruisair system mostat (WARMER/COOLER) knob slowly toward equipped with the rotary knob control, verify the the center position until you hear it “click”... -
Page 16: Operating Instructions: Smx Series Controls
“Outside” will light and the display will Refer to the SMX series user’s guide for show outside temperature. Press the TEMP additional details on Cruisair’s computer-based key a third time and you will see an alternating control systems. display of setpoint, inside temperature and outside temperature. -
Page 17: Chapter 7: Maintenance
Observe The Following: air path. Locate this filter and clean it if a visible Every Cruisair component must be buildup of lint has collected. If filters were electrically grounded using the grounding installed, they are usually located behind the points provided. -
Page 18: Chapter 8: System Failure Troubleshooting Guide
CHAPTER 8: System Failure Troubleshooting Guide Trouble Probable Cause Symptoms Remedy Compressor fails to start Power source failure No current at power source Check for tripped circuit breaker Faulty switch assembly No current at condensing Check for faulty unit terminal strip switch Low voltage Compressor tries to start &... -
Page 19: Chapter 9: System Charging Troubleshooting Guide
CHAPTER 9: System Charging Troubleshooting Guide Pressures Suction/Discharge Symptoms Possible Cause Remedy Normal Normal Suction line sweating w/droplets up to compressor Proper charged system Compressor warm on top & hot on bottom Temp differential across cooling coil is 16-20° F Suction line cool, not sweating Low on charge Low charge - frosty... -
Page 20: Chapter 10: Installation Wiring Diagrams
CHAPTER 10: Installation Wiring Diagrams Index of Diagrams • Cooling Only Systems Built and Installed Through 1989 For: Condensing Units: ACA-14 Series Controls: SA1 Series Switch Assembly ....................21 • SKB-208 Cooling Only Systems Built and Installed From 1989 Through June 1996 For: Condensing Units: ACA-14U & ACA-14BU Controls: SA1 Series Switch Assembly ....................22 • SKB-208A Cooling Only Systems Built and Installed From 1989 Through Current Production For: Condensing Units: ACA-14U, ACA-14BU, ACA-14BS, & ACA-14HBS Controls: SA1 Series Switch Assembly .................... - Page 21 Cooling Only Systems Built and Installed Through 1989 SA1-ZB10 Switch To AC Assembly Power Panel 115V 60Hz-1Ø Condensing Unit ACA-14 Series Ground Lug Cooling Unit Condensate Typical Wiring Diagram: (1) Condensing Unit & (1) Cooling Unit Drain To AC Power Panel SA1-ZB10 115V...
- Page 30 Notes...
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Page 31: Warning
LETHAL gases within the closed area. VENTILATION - To cool or heat air, CRUISAIR, MARINE AIR and GRUNERT components are designed to move air through a heat exchanger by a blower or propeller fan. - Page 32 2000 N. Andrews Ave. Ext. • Pompano Beach, FL 33069-1497 USA Phone: 954-973-2477 • Fax: 954-979-4414 Website: www.dometic.com/marine • Email: sales@dometicusa.com L-0261...
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