Mars Air Systems L-2254 Installation Checklist, Seawater Cooling System, Mounting, Electrical

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Installation Checklist

(Review prior to installation)

Note: Refer to the Elite and Passport I/O manuals for installation and operation of those digital controls.

Seawater Cooling System

Speed scoop located as far below the water line and as close to the keel as possible

Shut off valve (sea cock) and speed scoop properly sealed and tight

Seawater pump is at least one foot below water line and securely mounted

Strainer mounted below pump with access to filter

Double/reversed stainless steel hose clamps on all hose connections

Teflon tape on all threaded connections

Hose runs uphill from speed scoop and sea cock to strainer, pump and a/c unit, then downhill (if possible) from a/c unit to overboard discharge

Water flowing freely from overboard discharge while pump is running

Pump relay panel, if used, must have its own circuit breaker sized for the pump (20 amp max)

All metal fittings should be bonded

Mounting

Not in engine room or bilge areas, must be sealed away from exhaust or fumes

Proper spacing allowed around unit

Attached to solid level platform with hold down clips provided

Condensate drain routed aft and down hill to a sealed sump (not bilge)

Blower rotated toward supply air grille

Electrical

The wiring diagram is located in the electrical box. If that diagram is damaged or if you need a copy, please call Dometic with the unit part number, serial number, and wiring diagram number, all of which are located on the unit data plate.

All butt connections on pumps wire tightly crimped and heat shrunk

AC power source installed and grounded/bonded in accordance with ABYC standards

Control wires connected to terminal strip with captive fork or ring terminals

Circuit breakers sized according to specifications on the data plate label

Digital display cable is connected at both ends

Pump Relay Panel (if used) has a dedicated circuit breaker sized for the pump but not to exceed 20 amps maximum.

Grilles and Ducting

Supply air grille mounted as high as possible

Return air grille mounted as low and as close to the a/c unit as possible

Return air grille mounted away from bilge vapors or exhaust fumes

Ducting is pulled taut, straight, smooth and properly connected with no excess

L-2254 Installation

9

English

 

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Contents Vector compact Page Table of Contents Introduction Clean Air Act Amendments of 1990 Title VI C-1Marine Air Systems How It WorksSafety Considerations InstallationPlacement of System Unpacking and InspectionCondensate Drains Blower AssemblyMounting Brackets Supply & Return Air Grilles and Transition BoxesSeawater Pump and Plumbing Failure to install a seawater strainer will voidPhase Notice Manual Control Panel MCP InstallationElectrical Connections, Grounding and Bonding Circuit breaker before opening electric box. See Figures 9Seawater Cooling System Installation ChecklistMounting ElectricalQuick Start Operations Checklist OperationMechanical Control Panel MCP Operation General Troubleshooting TroubleshootingDigital Controls Troubleshooting Fault Unit switches to heat while in cool mode Fault No heatFault HPF is displayed Fault LPF is displayedFault PLF is displayed Elite Digital Control only MCP Mechanical Control Panel TroubleshootingMaintenance Manufacturers Limited Warranty Agreement Warranty with the Elite or Passport I/O digital conWarranty with MCP Mechanical Control Panel control Description of Figures Overview of Vector Compact Placement of Vector Compact M1020049 Knob Control Model 10K 12K 16K 18K 24K Wiring Diagrams for Mechanical Controls VCM5-16 & 24K 2254 Wiring Diagrams for Digital Controls VCD5-16 & VCD/VHD 24K 2254 Wiring Diagrams for Digital Controls VCD18K-HV & VCM18K-HV Page Page Page Page Page Dometic Environmental Corporation