Ducting; Seawater Pump And Plumbing - Giatsu GIA-MAB-O-05Y01 Manual De Usuario E Instalacion

Aire acondicionado para barcos y yates
instructions.
Model
Min. Return Air Grilles Size (re.)

3.10 Ducting

Good airflow is critical for the performance of the entire system. The static pressure should not
exceed 100 Pa.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 degree bends (two
tight 90° bends can reduce airflow by 25%). If a transition box is used, the total area of supply air
ducts going out of the box should at least equal the area of the supply duct feeding the box. To
calculate the square inch area of a round duct, multiply the radius by itself (r
number by 3.1416(π). The following is a summary of proper ducting connections:
(4). Pull back the fiberglass insulation exposing the inner Mylar duct hose.
(5). Slide the Mylar duct hose around the mount ring until it bottoms out.
(6). Screw 3 or 4 stainless steel sheet metal screws through the duct hose into the transition
ring. Make sure to catch the wire in the duct hose with the heads of the screws. Use finish
washers with the screws if necessary. Do not use band clamps, as the hose will slide off.
(7). Wrap duct tape around the ducting and ring joint to prevent any air leaks.
(8). Pull the insulation back up over the Mylar to the ring and tape this joint.
(9). Remove excess ducting and use the same connection method at the supply air grille.
(10). All ducting should:
Be appropriately sized for each application.
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Run as smoothly and taut as possible.
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Have as few bends or loops as possible.
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Be securely fastened to prevent sagging or chafing during vessel operation.
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Have all excess ducting lengths trimmed off.
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Not be flattened or kinked.
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Insulated when located in high heat load areas (hull side, mechanical compartments, etc.).
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Be properly protected against potential damage when routed through open areas or
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bulkheads.

3.11 Seawater Pump and Plumbing

Several guidelines should be followed during the installation of the seawater system. Since
the circulation pump is centrifugal and not self-priming, it must be mounted so that it is always at
least 1' (305mm) below the water line regardless of which tack the vessel is on. Pump may be
mounted horizontally or vertically, however, the discharge must always be above the inlet. Pump
head should be rotated toward the direction of water flow. Install the seawater speed scoop intake
as far below the water line and as close to the keel as possible in any application, but especially
on a sailboat, to keep the intake in the water when the boat heels over so that air does not get into
the system. The speed scoop intake must face forward and not be shared with any other pump. A
seawater strainer is mandatory between the shut off valve (seacock) and the pump to protect the
5K(7K) 9K
2
48500mm 65680mm
8
12K
2 2
76514mm
2
) and multiply that
16K
2
103584mm