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Dometic DX Remote & Self-Contained A/C Installation And Operation Manual

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DX Remote & Self-Contained A/C
v
INSTALLATION • OPERATION
Direct Expansion Systems
Revised: 20170710
v
L-2086
English

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Summary of Contents for Dometic DX Remote & Self-Contained A/C

  • Page 1 DX Remote & Self-Contained A/C INSTALLATION • OPERATION Direct Expansion Systems Revised: 20170710 L-2086 English...

  • Page 3: Table Of Contents

    (Remote Condensing Unit Systems Only) ........13 Copyright 2004 Dometic Corporation, All Rights Reserved - Every precaution has been taken in the preparation of this manual to insure its accuracy. However, Dometic Corporation assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of this product and information contained herein.

  • Page 4: Dx Remote & Self-Contained A/C Systems

    Dometic Corporation Applications Department for assistance. Phone In heat mode, the opposite is true. As the seawater tem-...

  • Page 5: Subsystems

    Subsystems grammable functions allow the user to customize the system to suit the specific needs of their boat and boating environment. Both self-contained units and remote condensing systems require subsystems that are purchased separately because of The two SMX control systems available are SMX II and the the many variations and options available.

  • Page 6: Dx Remote & Self-Contained A/C Systems

    DX Remote & Self-Contained A/C Systems • Installation Installation Procedures at 50Hz. If a boat is traveling in 50Hz and 60Hz environments, then 60Hz equipment should be installed, with special attention This first section covers installation procedures for Cruisair to sizing (especially the pumps) so that the system performs up direct expansion (DX) air conditioning systems, both self-con- to expectations.

  • Page 7: Site Location Checklist

    Site Location Checklist Selecting the Site • Unit is not located in an engine room or near an internal Cruisair condensing units are designed to be installed in any combustion engine convenient location. The unit is normally placed in the engine room or other machinery space, but it can be located in the •...

  • Page 8: Installing The Cooling/Heating Unit

    Installing The Cooling/Heating It is not necessary for the evaporator coil to be placed directly in front of the return air grill, but an unobstructed path must be Unit available for the air to get to the coil. A 2” (50mm) space in front of the evaporator coil must be maintained.

  • Page 9: Installing The Seawater Cooling System

    ing unit has additional tubing to help with installation. Take care A self-draining seawater system will allow air in the piping to when bending this tubing as it can easily kink or crack a weld rise naturally through the pump and then be expelled. It will joint resulting in refrigerant loss.

  • Page 10: Manifolds

    Manifolds need to be larger than the outlet pipe size. Do not use pump connections to determine hose size. If a pump is serving multiple units, then a seawater manifold will be needed to supply water to all units. This can be as •...

  • Page 11: Discharge Air Grill

    Plenums, or transition boxes are used with flexible ducting to be rear access with sufficient clearance for the wiring and the split and route the discharge air as needed. Figure 12 shows protective cover. The thermostat bulb is on a 10 ft (3m) long several plenum configurations.

  • Page 12: Voltage And Triggers

    • Wiring diagrams are included in the back of this manual and will not perform properly. under the cover of the electrical boxes on all units. Contact Dometic Corporation if you are not sure if you have the correct diagrams. • Each air conditioning unit requires it’s own dedicated circuit breaker, of the appropriate size.

  • Page 13: Final Inspection

    Inspecting the Self Contained Unit Safety Warning To prevent a possible electrical shock in the event a • Is the air conditioning unit securely mounted? component has an electrical breakdown, which could re- • Is the unit located so that it will not draw fumes from the sult in serious injury or death, always ground the system engine room and discharge them into the compartment? in the following manner:...

  • Page 14: Inspecting The Control/Switch Assembly And Electrical Wiring

    Inspecting the Control/Switch As- You will need the following tools to complete the sembly and Electrical Wiring charging procedure: • R-22 container (typically the disposable-type container • Is the thermostat sensor or thermistor properly located and color-coded green for R-22) secured in the return air path and not in direct contact with any metal objects? (For switch assemblies with two sensing •...

  • Page 15: Removing Refrigerant From The System

    2. Remove the white gauge port caps from both base valves. No gas should escape. If it does, retighten the cap and call The following instructions apply to both self-contained and Dometic Corporation for assistance. remote condensing systems. 3. Close all gauge manifold valves.

  • Page 16: Dx Remote & Self-Contained A/C Systems

    DX Remote & Self-Contained A/C Systems • Operation Operating Instructions - Rotary SMX II/SMX Net Operation Controls Open seacock (seawater inlet valve). 2. Turn on main circuit breakers for the air conditioning sys- SA & SSA Models tem. If there is more than one unit on board, you must also turn on the breaker for the seawater pump.

  • Page 17: Cool Mode

    SMX Net Series speed automatically slows. Once setpoint is reached, the com- pressor cycles off and the fan keeps running on low speed. If your boat is equipped with the optional outside thermistor, press TEMP a second time to display outside temperature. Adjusting Brightness Press a third time for an alternating display of setpoint, inside temperature and outside temperature.

  • Page 18: Owner Maintenance - Routine

    Owner Maintenance - Routine The unit will not operate at all. Solution Condensate Drains Blown fuse or tripped circuit breaker. Replace fuse with time delay type or reset breaker. Check for correct sizing. Every three months, check the condensate drains for obstructions by pouring a quart of water rapidly into the condensate pan.

  • Page 19: Descriptions Of Figures

    Descriptions of Figures Fig. 1 Typical Self-Contained Unit Fig. 2 Typical Remote Condensing Unit Fig. 3 Typical Draw-Through Cooling Unit Fig. 4 Typical Self-Contained Installation Fig. 5 Typical Draw-Through Cooling Unit Installation Fig. 6 Typical Blow-Through Cooling Unit Installation Fig. 7 Refrigerant Line Sizes Fig.
  • Page 20 Fig. 1 - Typical Self-Contained Unit Fig. 4- Typical Self-Contained Installation Fig. 2 - Typical Remote Condensing Unit Fig. 5 Typical Cooling Unit Installation (draw- through) Fig. 3 - Typical Draw-through Cooling Unit Fig. 6 Typical Cooling Unit Installation (blow- through) L-2086...
  • Page 21 Fig.7 - Refrigeration Line Sizes Notes: • Maximum length of refrigerant line between condensing unit and cooling unit is 50 feet (15m). • Only use seamless refrigeration grade copper tubing. • Insulate discharge and suction tubes separately. • Use minimum 3/8” (10mm) thick closed cell insulation. •...
  • Page 22 Fig. 8 - Seawater Piping - Proper System and Common Mistakes Fig. 9 - Pump head orientation Fig.10 - Seawater manifolds L-2086...
  • Page 23 Fig. 11 - Duct and Grill Sizes Tables Fig. 12 - Plenum Configurations L-2086...
  • Page 24 Fig. 13a - Switch Dimensions and Templates L-2086...
  • Page 25 Fig. 13b - Switch Dimensions and Templates L-2086...
  • Page 26 Fig. 14 - SHR5-16 StowAway Wiring, #082611 Fig. 15 - SH24C StowAway Wiring, #080264 L-2086...
  • Page 27 Fig. 16 - SHF5-16-C StowAway Compact w/ 3-knob Control Wiring Fig. 17 - SHF24-C StowAway Compact w/ 3-knob Control Wiring L-2086...
  • Page 28 Fig. 18 - SHUF18(C/CK)/1-HV StowAway Compact w/ 3-knob Control Wiring Fig. 19 - SHUF5-16(C/CK)/1-HV StowAway Compact w/ 3-knob Control Wiring L-2086...
  • Page 29 Fig. 20- WFAH6-16 Condensing Unit Wiring, #082201 Fig. 21- R/F20-60C 1-Ph. Cond. Unit Wiring, #082534 L-2086...
  • Page 30 Fig. 22- R/F24-72 3-Ph. Cond. Unit Wiring, #082556 Fig. 23- SA3-Z Switch Wiring L-2086...
  • Page 31 Fig. 24- SA5-Z Switch Wiring Fig. 25- PR3X Pump Relay Wiring L-2086...
  • Page 32 Fig. 26- PR8X Pump Relay Wiring Fig. 27- WFAH System Wiring, 115V L-2086...
  • Page 33 Fig. 28- WFAH System Wiring, 230V Fig. 29- WFAH System Wiring, 230V, w/ Aux. Heat L-2086...
  • Page 34 Fig. 30- R/F Type System Wiring, SA3-Z Switch, 1Ph. Fig. 31- R/F Type System Wiring, SA3-B Switch, 1Ph. L-2086...
  • Page 35 Fig. 32- R/F Type System Wiring, SA3-Z Switch, 3Ph. L-2086...
  • Page 36 Fig. 33- Refrigerant Charging Curves (R22) L-2086...
  • Page 37 Fig. 34 Charging Systems with Alternative Refrigerants New A/C units are available from the factory with non-HCFC refrigerants. R-417A (also known as NU-22 or Isceon 59 ) is a direct drop-in replace- ® ® ment for R22. It will work with Alkyl Benzene and mineral lubricants so standard compressors can be used.
  • Page 38 NOTES...
  • Page 39 NOTES...
  • Page 40 DOMETIC MARINE DIVISION 2000 N. Andrews Ave. Pompano Beach, FL 33069 USA +1 954-973-2477 +1 954-979-4414 Mail marinesales@dometicusa.com 24/7 TECH SUPPORT FOR UNITED STATES AND CANADA 8:00 AM to 5:00 PM Eastern Time: 800-542-2477 After hours and weekends: 888-440-4494 INTERNATIONAL SALES AND SERVICES Europe and the Middle East: +44 (0) 870-330-6101 For all other areas visit our website to find your nearest distributor.

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