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UNIT INSTALLATION

Installation 
OVERVIEW

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Included accessories
with the air conditioner

Before installation, please read these instructions completely and then plan for all connections. This includes ducting, condensate drains, seawater inlet and outlet, seacock, sea strainer, pump, hoses, electrical power connections, and the location of the control panel. Please note: the blower on the Mabru air conditioner can be rotated to assist with ductwork installation.

Accesories.png

1. Color touch screen display with black bezel.
 

2. (4) Drain pan mounting clamps. (Mounting screws are not provided.)
 

3. Roll of insulation tape, which can be used to wrap around the duct to reduce air leaks.
 

4. 15 ft display cable. (Standard CAT 5 ethernet cable can be used for a longer run, up to 50’.)

5. The SC5DC, SC7DC, SC12DC, and RadAir™ (RT12DC) air conditioners come with a 350 GPH 12V raw water pump.

6. (2) Rubber shims to be mounted under the drain pan to improve angle
towards the plumbed drain.

7. 7 ft remote temperature sensor. (Loose item on AC voltage units and preinstalled on DC units.

**115/230V AC air conditioners do not come with a pump. A pump can be purchased as an additional item.

PLACEMENT
OF THE MABRU
AIR CONDITIONER

1. Choose a low and flat location. This may be in a locker, or under a bench or bed. Shim the air conditioner toward the utilized drain to assist with draining the water that accumulates into the condensate pan. Typical installation locations are under a V berth, bunk, settee, or closet. Never mount the air conditioner by directly screwing it into the hull.

 

2. The air conditioner should be installed in or next to the room that it is going to be used to cool. The unit should draw its return air from the room being cooled and not pull in hot humid air from outside or bilge areas.
 

3. Do not install the air conditioner in the engine room or a bilge connected to the engine room.
 

4. If draining the condensate to a bilge, place the drain line as close to a bilge pump as possible. A P-trap is also recommended when draining to the bilge. A shower sump box and pump may also be used for the condensate drain, and this is the preferred method to eliminate sitting water in the bilge. Our marine air conditioners can produce as much as 5 gallons of condensate water per hour.
 

5. Mount the air conditioner horizontally on a floor or suitable shelf, with the pan drain tilted downhill towards the drain. It may be necessary to use shims under the drain pan to ensure proper drainage. There should be little to no sitting water in the pan while the unit is in operation. If there is ½” or more of sitting water in the pan, the unit must be shimmed to reduce the level of water in the pan.

6. Use a speed scoop on the outside of the intake thru-hull. The slotted side of the scoop must face forward and not be obstructed by any hull steps, intakes, or transducers in the hull forward of the air conditioner intake.

7. Install the thru-hull and seacock as low and as far back in the boat as possible in an accessible location for inspection and maintenance.

8. Install the air return as close to the unit as possible. It is important that the return air comes from the room being cooled.


9. Install cold air vents as high as possible and away from the return vent to prevent the cold air from being pulled back into the return.
 

10. Position the output of the blower by loosening the clamp on the blower support and rotating the blower. Tighten the hose clamp once the blower is in the optimal position.
 

11.  Four mounting brackets are provided. They go over the edge of the drain pan and secure the unit to the floor. Mounting hardware is not included, but is needed to properly secure the unit.


12. There must be at least 3” between the evaporator and the nearest wall, unless the evaporator is mounted directly against an appropriately sized return vent.

13. The color touch display should be installed in a dry location inside the boat. The current color touch display is not water-proof.

Installation Ducting

MABRU_MARINE_DUCTING.jpg

The pictures above show the ideal placement of the return air temperature sensor. The sensor should be place in the path of the return air to the evaporator. The control panel can also be used without the return air temperature sensor, but the reading will be much less accurate, due to the heat generated by the display.

Serial
Number
Placement

The unit label with the SN is located on the top of the VI electrical box and also located on top of the evaporator on units sold in 2024 and onward. The information label is located in back of the DC electrical box, which requires the box to be removed from the wall. In units sold in or after 2024, there will also be a SN located on top of the evaporator. On Standard units, the unit label is located on the cover of the electrical box. Please see examples below of the SN placement on our different models.

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DC unit label

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VI unit label

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SN location on evaporator

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Standard unit label

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