Dometic MCS-CTRL Installation And Operation Manual Download Page 8

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Wiring Diagrams

Smart Touch Cabin Control

5 Wiring Diagrams

The following diagrams show the component
connections for the direct expansion (DX) and chilled
water (CW) systems.

5 .1 Understanding the DX Wiring
Diagram

WARNING: ELECTRICAL SHOCK .

Turn the power off before opening the electrical
box. Failure to do so could result in death or serious
injury.

Run Capacitor

Low-Pressure

Switch

High-Pressure

Switch

Optional

DC Blower

Comp L1
Pump L1
Pump L2

0-10 VDC

GND

Fan L1

Comp L2

Compressor

Inside Temperature Sensor Jack

Not Active

Optional Water-Out Temperature Sensor

Ground

Start

Capacitor

Start Relay

Fan

Fan Run

Capacitor

Pump or

Pump Relay Panel

Temperature Sensor Selection Jumper

Low-Pressure Switch Jumper

Reversing Valve or

Electric Heat

Gate Terminals to Aux Heat Relay

Display Jacks (for 8- or 6-pin Display and Cables)

Optional Outside Air Temperature Sensor

Wiring Diagram - DX

Summary of Contents for MCS-CTRL

Page 1: ...MARINE CONTROL UNITS WARNING Cancer and Reproductive Harm www P65Warnings ca gov Form No L 3380 337767 2 20 2020 Dometic Corporation EN Smart Touch Cabin Control Installation and Operation Manual 2...

Page 2: ...e Operating Cycles 14 8 2 Understanding the Operating Modes 15 8 3 Understanding the Fan Modes 16 9 Control Parameters 16 9 1 Understanding the General Settings 17 9 2 Understanding the DX Operational...

Page 3: ...eneral Safety Messages WARNING ELECTRICAL SHOCK FIRE AND OR EXPLOSION HAZARD Failure to obey the following warnings could result in death or serious injury Use only Dometic replacement parts and compo...

Page 4: ...The air conditioning unit operates most efficiently in seawater temperatures below 90 F 32 C At higher seawater temperatures the unit will operate at a reduced capacity A high pressure shutdown may o...

Page 5: ...Main Menu Options Selects the menu option to modify 3 4 Understanding the Settings Screen Layout This screen is an example of a typical setting screen Actual settings screens may vary in appearance q...

Page 6: ...release u Power Toggle between On and Off with a press and release 3 6 Understanding the Main Screen Enter from the home screen to access the most basic functions as well as the menu for more options...

Page 7: ...dard All custom cable lengths supplied in standard 5 0 ft 1 5 m increments 75 ft 22 9 m Maximum Sensor Inputs Ambient or Inside Air Temp 1 High Refrigerant Pressure 1 Low Refrigerant Pressure optional...

Page 8: ...apacitor Low Pressure Switch High Pressure Switch Optional DC Blower Comp L1 Pump L1 Pump L2 0 10 VDC GND Fan L1 Comp L2 Compressor Inside Temperature Sensor Jack Not Active Optional Water Out Tempera...

Page 9: ...ature Sensor Optional Water Out Temperature Sensor Optional Outside Air Temperature Sensor JP2 Ground Fan Water Valve Electric Heat Strip Fan Run Capacitor L2 L2 L2 AC L2 L1 L1 L1 L1 Display Jacks for...

Page 10: ...re sensing when properly located and installed For the sensor location on the display panel see Figure 7 I IIf you cannot mount the display in a suitable location install the optional remote air senso...

Page 11: ...nnector cable into the inside jack J3 in the upper left corner of the circuit board 6 3 2 Outside Air Temperature Install this optional sensor to monitor the outside air temperature OAT I IThe sensor...

Page 12: ...fan is running and that there is steady airflow out of the supply air grille 6 Select a temperature set point lower than the current cabin temperature to start the compressor and seawater pump 7 Chec...

Page 13: ...output test is now running and the electric heater is energized Please verify that the heater is operating and that the supply air is warmer than the room ambient temperature Press the down button to...

Page 14: ...Cool or Heat Mode Heating and cooling are supplied as selected By selecting cool mode only cooling is supplied By selecting heat mode only heating is supplied The cabin temperature in either mode is...

Page 15: ...prevents small temperature overshoots from causing the system to switch between heating and cooling when it is not necessary 8 2 4 Cool The cooling mode icon displays and only the cooling system oper...

Page 16: ...bar level will increase as you increase the speed setting Three manual fan speeds are available high medium and low To select a manual speed press and release the fan icon until the desired speed is...

Page 17: ...C Celsius readings display in tenths for example 2 2 Auto corresponds to automatic by line frequency where 60 Hz automatically sets the unit to Fahrenheit F and 50 Hz automatically sets the unit to C...

Page 18: ...ce set the timer tracks the total amount of run hours that the fan accumulates When the timer setting is reached the status icon flashes briefly until it is cleared The room temperature continues to d...

Page 19: ...cle The default setting is 50 F 10 C and it can be adjusted between 40 75 F 4 24 C See Dehumidification on page 15 for the dehumidification mode functions 15 General Settings Screen 6 16 Auto Fan Spee...

Page 20: ...8 22 Humidity Control Set Point For DX applications If the optional humidity sensor is connected to the control board and if the auxiliary electric heat is installed and enabled this feature allows th...

Page 21: ...lure fault is detected and displayed Sometimes during an initial start up or a new unit installation the refrigerant pressure is below the minimum In this case the fault should be bypassed until the p...

Page 22: ...sensor located in the return air path greatly increases the effectiveness of the de icing feature and this option should be considered whenever the display sensor cannot read the room temperature acc...

Page 23: ...he factory default 40 F 4 C The reverse cycle heat has operated more than five minutes Once the seawater rises 3 F above the seawater low temperature limit the system returns to reverse cycle heating...

Page 24: ...selecting 10 F 12 C opens the valve when the water temperature is 10 F less than ambient in cooling mode and 10 F greater than ambient in the heating mode Careful selection of the temperature differe...

Page 25: ...red similar to a computer motherboard battery so there should never be a need to install or replace the backup battery When the Smart Touch Cabin Control is plugged into a control that is powered up t...

Page 26: ...Scheduler Screen Date and Time Submenu 1 26 Program Scheduler Screen Date and Time Submenu 2 To access the date time menu select main menu date time menu and the setting to modify Date Time Display C...

Page 27: ...Mode Settings Adjusts the system operations when in sleep mode See section Sleep Mode Setting Submenus on page 27 for submenu screens 28 System Menu Screen 2 4 Display Lock Adjusts the display lockin...

Page 28: ...an absolute maximum of 25 31 System Menu Screen Sleep Mode Setting Text Color Submenu 4 Sleep Mode Text Color Select from 126 different text colors to display during sleep mode 32 System Menu Screen S...

Page 29: ...ameters or saved entries will be lost 9 8 Understanding the Troubleshooting Commissioning Screens This section describes the menu screens available for troubleshooting and commissioning the system See...

Page 30: ...dicates the seawater is below 40 F 4 C 38 Troubleshooting Commissioning Help and Information QR Link For More Help Scan the QR code to open the Smart Touch Cabin Control website for help The fault des...

Page 31: ...ins on for four minutes after the heater cycles off even if the fan is set to cycled operation 41 Compressor Run Hours 2 Compressor Run Hours Displays the number of compressor run hours To clear press...

Page 32: ...Hours Fault History Max 500 entries Compressor Run Hours Hrs Fan Run Hours Hrs Min Program Scheduler Scheduler Mode On Off Program Mon Fri Program Sat Sun Program Monday Program Tuesday Program Wedne...

Page 33: ...f Off 95 140 F or Off 35 60 C DX CW Mode Set by jumper DX Override CW Override Inside Temp Sensor Auto Auto Display Alt Air Fan Operational Mode Continuous Continuous Cycled Dual Temp Set Points Off O...

Page 34: ...enu Settings Main Screen Home Screen Change Pin Enter Current Pin Enter New Pin Sleep Mode Settings Sleep Mode Display Standard Logo Blank Screen Backlight On Blank Screen Backlight Off Custom Text Cu...

Page 35: ...w 1 Regularly clean the strainer basket 2 Periodically check the overboard discharge for a steady stream of water 3 See the seawater intake speed scoop for blockage 4 Ensure the hoses are not looped k...

Page 36: ...nd discharge through the overboard thru hull fitting a Close the seacock b Remove the hose from the strainer discharge c Raise the hose above the pump so the pump does not lose its prime and pour in t...

Page 37: ...allation and Setup on page 10 Install an alternate air sensor if necessary If an alternate air sensor is already installed in the air stream ensure it does not touch anything warm like the condenser c...

Page 38: ...system is not in the proper mode of operation or the electric heater is disabled Be sure the chiller is in heat mode If the air handler system is equipped with water temperature sensors check the wate...

Page 39: ...igh pressure fault is present The seawater flow is obstructed The condenser coil may be too hot to touch Water should be flowing strongly out of the overflow Be sure the seacock is open and water is f...

Page 40: ...r display cable Replace the air sensor If the air sensor is located in the faceplate of the display replace the display or add an alternate air sensor Install a different display cable Ensure that the...

Page 41: ...FLORIDA USA 33069 1 800 542 2477 13 2 Asia Pacific APAC Countries If the product does not work as it should please contact your retailer or the manufacturer s branch in your country see the back of th...

Page 42: ...42 EN Smart Touch Cabin Control...

Page 43: ...43 EN Smart Touch Cabin Control...

Page 44: ...om dealer YOUR LOCAL SUPPORT dometic com contact YOUR LOCAL SALES OFFICE dometic com sales offices A complete list of Dometic companies which comprise the Dometic Group can be found in the public fili...

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