Dometic DX Remote & Self-Contained A/C Installation And Operation Manual Download Page 40

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L-0384

DOMETIC MARINE DIVISION
2000 N. Andrews Ave. Pompano Beach, FL 33069 USA
Tel

+1 954-973-2477

Fax

+1 954-979-4414

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.

dometic.com

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

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

Page 2: ......

Page 3: ...talling The Air Distribution System 10 Return Air Grill RA Grills 10 Ducts 10 Discharge Air Grill 11 Installing the Control Unit 11 The SMX Control 11 The Rotary Knob Switch Assembly 11 Installing the Pump Relay 11 Location 11 Voltage and Triggers 12 Electrical Connections 12 Three Phase Power 12 Final Inspection 13 Inspecting the Seawater Cooling System 13 Inspecting the Self Contained Unit 13 In...

Page 4: ...f the system is dependent on both the seawater and cabin temperatures In cooling the air conditioner works best when the seawater temperature is below 90 F 32 C At higher water temperatures the unit will operate but at reduced capacity As the water temperature rises so does the refriger ant gas pressure A high pressure safety switch will shut the unit down if the water temperature gets too hot or ...

Page 5: ...d 2 knob switches for control of slave cooling units and a 4 knob switch for use on systems with auxiliary electric heat Cruisair SMX controls are advanced microprocessor systems that provide a more comfortable environment and better system protection than mechanical controls In addition over 20 pro grammable functions allow the user to customize the system to suit the specific needs of their boat...

Page 6: ...ance however 50Hz equipment can not be run at 60Hz because the 50Hz motor will run too fast and cause damage Seawater pumps will lose even more performance at 50 Hz due to the nature of centrifugal pumps Dedicated 50Hz units will give full performance at 50Hz and should be used when the system is going to be run exclusively at 50Hz If a boat is traveling in 50Hz and 60Hz environments then 60Hz equ...

Page 7: ...g System Selecting the Site Cruisair condensing units are designed to be installed in any convenient location The unit is normally placed in the engine room or other machinery space but it can be located in the living areas The condensing unit will produce condensation so a drip pan may be needed The space around the unit can be insulated to reduce noise if desired The unit is internally cooled an...

Page 8: ... coil to be placed directly in front of the return air grill but an unobstructed path must be available for the air to get to the coil A 2 50mm space in front of the evaporator coil must be maintained Site Location Checklist Unit is not located in an engine room or near an internal combustion engine There is no obstruction of airflow from return air grill to coil Accessible for service and mainten...

Page 9: ...ne high point in the system This is said to be self draining because all water would drain out of the piping if the boat were lifted out of the water Whenever air gets into the system which can happen in heavy seas or a sharp turn it can become trapped in the pump Because a centrifugal pump cannot pump air flow through the system is lost A self draining seawater system will allow air in the piping...

Page 10: ...verboard discharge Use larger hose when the run is longer than 16 feet 5m Bonding Bond all metallic parts through hull fittings valves strainer manifolds etc that are in contact with seawater to the vessel s bonding system in accordance with ABYC standards E 8 and E 9 Items should only be bonded or grounded once If an item is in contact with an electrically grounded part pump head or seawater cond...

Page 11: ... seen and reached There should be rear access with sufficient clearance for the wiring and the protective cover The thermostat bulb is on a 10 ft 3m long capillary tube and the switch assembly must be installed close enough to the unit so the bulb can be mounted in the return air path Remote condensing systems use SA type switches which have terminal strips that must be mounted to the back of the ...

Page 12: ...units have terminal strips that are labeled or have color coded wiring Open terminal strips such as supplied with switch assemblies require that the included terminal strip covers be installed over the strip and switch back after installation is complete Wiring diagrams are included in the back of this manual and under the cover of the electrical boxes on all units Contact Dometic Corporation if y...

Page 13: ...ne at all times Are the inlet and outlet thru hulls secure properly sealed and properly oriented Are all hose clamps tight Are seawater hoses double clamped Are there any loops or dips in the seawater plumbing that might cause the system to become air locked Is the strainer located between the seacock and the pump and is it correctly oriented Are all metallic seawater fittings properly bonded Insp...

Page 14: ...vacuation port red cap located on the base valve of the condensing unit This port has a schrader valve so you can evacuate and vapor charge the lines and cooling unit without releasing the refrigerant in the condensing unit You will need the following tools to complete the charging procedure R 22 container typically the disposable type container color coded green for R 22 four valve gauge manifold...

Page 15: ... caps Remove the gauge hoses and replace and tighten the port caps Note It is recommended to charge the system in the cool mode as described above If conditions are such that charging must be done in the heat cycle the gauge connections must be re versed on the base valves Also note that in the heat mode the same pressures can be observed at two different charge levels This could lead to an overch...

Page 16: ...lowing are basic operation instructions for both systems For complete installation and operation infor mation consult the appropriate manual L 2066 for SMX II or L 2067 for SMX Net SMX II SMX Net Operation 1 Open seacock seawater inlet valve 2 Turn on main circuit breakers for the air conditioning sys tem If there is more than one unit on board you must also turn on the breaker for the seawater pu...

Page 17: ...Automatic Fan Speed Control If in manual fan mode press FAN key to select automatic fan control The Manual Fan Indicator goes off and the system will automatically adjust fan speed as the actual cabin temperature deviates from the setpoint As setpoint is approached the fan speed automatically slows Once setpoint is reached the com pressor cycles off and the fan keeps running on low speed Adjusting...

Page 18: ...ow the water to drain from the pump Drain and clean the seawater strainer Trouble Shooting Before you call for service review this list It may save you time and expense 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 nearest Cruisair dealer Situation The unit will not operate at all Soluti...

Page 19: ... 16 C StowAway Compact w 3 knob Control Wiring Fig 17 SHF24 C StowAway Compact w 3 knob Control Wiring 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 Fig 20 WFAH6 16 Condensing Unit Wiring 082201 Fig 21 R F20 60C 1 Ph Cond Unit Wiring 082534 Fig 22 R F24 72 3 Ph Cond Unit Wiring 082556 Fig 23 SA3 Z Switch Wiring F...

Page 20: ...ained Unit Fig 2 Typical Remote Condensing Unit Fig 3 Typical Draw through Cooling Unit Fig 4 Typical Self Contained Installation Fig 6 Typical Cooling Unit Installation blow through Fig 5 Typical Cooling Unit Installation draw through ...

Page 21: ...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 Seal glue and or tape all insulation seams Use dead head orientation of TEEs on multiple cooling unit sys tems to help ensure proper distribution of refrigerant ...

Page 22: ...22 L 2086 Fig 8 Seawater Piping Proper System and Common Mistakes Fig 10 Seawater manifolds Fig 9 Pump head orientation ...

Page 23: ...23 L 2086 Fig 12 Plenum Configurations Fig 11 Duct and Grill Sizes Tables ...

Page 24: ...24 L 2086 Fig 13a Switch Dimensions and Templates ...

Page 25: ...25 L 2086 Fig 13b Switch Dimensions and Templates ...

Page 26: ...26 L 2086 Fig 14 SHR5 16 StowAway Wiring 082611 Fig 15 SH24C StowAway Wiring 080264 ...

Page 27: ...27 L 2086 Fig 16 SHF5 16 C StowAway Compact w 3 knob Control Wiring Fig 17 SHF24 C StowAway Compact w 3 knob Control Wiring ...

Page 28: ...28 L 2086 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 ...

Page 29: ...29 L 2086 Fig 20 WFAH6 16 Condensing Unit Wiring 082201 Fig 21 R F20 60C 1 Ph Cond Unit Wiring 082534 ...

Page 30: ...30 L 2086 Fig 22 R F24 72 3 Ph Cond Unit Wiring 082556 Fig 23 SA3 Z Switch Wiring ...

Page 31: ...31 L 2086 Fig 25 PR3X Pump Relay Wiring Fig 24 SA5 Z Switch Wiring ...

Page 32: ...32 L 2086 Fig 26 PR8X Pump Relay Wiring Fig 27 WFAH System Wiring 115V ...

Page 33: ...33 L 2086 Fig 28 WFAH System Wiring 230V Fig 29 WFAH System Wiring 230V w Aux Heat ...

Page 34: ...34 L 2086 Fig 30 R F Type System Wiring SA3 Z Switch 1Ph Fig 31 R F Type System Wiring SA3 B Switch 1Ph ...

Page 35: ...35 L 2086 Fig 32 R F Type System Wiring SA3 Z Switch 3Ph ...

Page 36: ...36 L 2086 Fig 33 Refrigerant Charging Curves R22 ...

Page 37: ...This must be done using the Dew Point for conversion Note There is no ideal superheat temperature It should be in the range of 10 to 20 F 5 6 to 11 1 C depending on the heat load On cool days superheat will be lower and on hot days it will be higher 7 To reduce superheat slowly add liquid refrigerant to the suction line Do this in very small increments and allow the system to stabilize before taki...

Page 38: ...NOTES ...

Page 39: ...NOTES ...

Page 40: ...4 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 dometic com ...

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