Mars Air Systems L-2254 manual Condensate Drains, Blower Assembly, Mounting Brackets, Ducting

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Minimum Tools Required

Screws drivers

Pliers

Pipe wrenches

Wire cutters/crimpers

Drill and assorted bits

Jig saw

Duct tape

Electrical tape

Teflon tape

Beding compound to seal thru hull fittings

Hardware to secure unit, pump, strainer, grilles & control panel

Condensate Drains

The condensate drain pan is 2" high with up to four drain locations. During conditions of high humidity, condensate may be produced at a rate of approximately 1/2 gallon per hour. With this in mind, it is important to route condensate drains downward to a sump pump. It is not recommended to route condensate drains to the bilge. After the condensate drain installation is complete, test the installation by pouring a quart of water into the pan and checking for good flow. See Figure 4.

For installation of the condensate drain:

1.Remove the aft facing watertight plug from the base pan of the a/c unit (see note).

2.Slip the solid washer and the liquid-seal washer onto the PVC fitting in that order.

3.Connect the fitting through the exposed hole in the base pan with the locking nut.

4.Securely tighten with two (2) wrenches to provide a proper seal.

5.Attach a 5/8" I.D. reinforced hose to the hose barb and secure with stainless steel hose clamps.

6.Install the condensate drain hose downhill from the unit and aft to a sump.

7.Two drain fittings may be used and the hoses teed together provided there is a minimum 2" drop form the bottom of the base pan to the tee connection.

Note: The reason to use the "aft facing" drain location is so that water will tend to drain out of the pan when the vessel is under way. However, the boat owner should inspect the pan when the vessel is at rest. If water is collecting in the pan along an edge other than "aft facing", then the drain on that edge should also be

utilized. This will help to prevent water from standing in the pan. See item 7 for instructions on connecting two drain lines.

IMPORTANT! Do not terminate condensate drain line within three (3) feet of any outlet of engine or generator exhaust systems, nor in a compartment housing an engine or generator, nor in a bilge, unless the drain is connected properly to a sealed condensate or shower sump pump.

Blower Assembly

With the Vector Compact you can achieve multi-direc- tional supply air discharge from a single unit by rotating the blower to the desired location. It is ideal for tight installations as 130° of rotation are available with which to position the blower. Its advanced design allows the blower to be easily removed for rotating or servicing by removing the two mounting ring screws and the screws attaching the blower to the drain pan. Rotate the blower to allow the most direct flow of air to the supply air grille. Reinstall the mounting screws. Plug any unused screw holes in the blower to prevent air loss.

Mounting Brackets

The a/c unit is supplied with a base pan that also serves as a condensate pan. Mounting clip brackets are pro- vided to secure the base pan onto a flat, horizontal surface. See Figure 5.

Supply & Return Air Grilles and Transition Boxes

Install the supply air grille as high as possible in a location that will provide uniform air distribution through- out the cabin, grille louvers should be directed upward. The return air grille should be installed as low and close to the a/c unit as possible to insure direct uninterrupted airflow to the evaporator. The return air grille should have a minimum four inches (4") of clearance in front of it, free from any furniture or other obstructions. In no instance should a supply air discharge be directed towards a return air grille, as this will cause the system to short cycle. Allow for adequate clearance behind the supply air grille(s) for the transition box and ducting connection. The table in Figure 8 shows minimum grille sizes. See the MAINTENANCE section of this manual for return air filter cleaning instructions.

Ducting

Good airflow is critical for the performance of the entire system. It is highly dependent on the quality of the ducting installation. The ducting should be run as straight, smooth and taut as possible minimizing the number of 90° bends (two tight 90° bends can reduce airflow by 25%). The table in Figure 8 shows minimum

L-2254 Installation

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Contents Vector compact Page Table of Contents Marine Air Systems Clean Air Act Amendments of 1990 Title VI C-1Introduction How It WorksPlacement of System InstallationSafety Considerations Unpacking and InspectionMounting Brackets Blower AssemblyCondensate Drains Supply & Return Air Grilles and Transition BoxesFailure to install a seawater strainer will void Seawater Pump and PlumbingElectrical Connections, Grounding and Bonding Manual Control Panel MCP InstallationPhase Notice Circuit breaker before opening electric box. See Figures 9Mounting Installation ChecklistSeawater Cooling System ElectricalQuick Start Operations Checklist OperationMechanical Control Panel MCP Operation Troubleshooting General TroubleshootingDigital Controls Troubleshooting Fault HPF is displayed Fault No heatFault Unit switches to heat while in cool mode Fault LPF is displayedMCP Mechanical Control Panel Troubleshooting Fault PLF is displayed Elite Digital Control onlyMaintenance 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