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Flex Duct Air Handlers

FEATURES ---------------
Unique Compact Modular Design
  • Mounting footprint provides greater installation flexibility.
  • Easy disassembly for access to components.
  • Large plenum chamber for maximum capacity.
  • Optimum efficiencies in heat and cool with 3-way valve that assures proper water flow.
  • Electric heating option. (1)
Blower/Coil Assemblies
  • Efficient, centrifugal blowers with shaded pole motors. (2)
  • Thermoplastic mounting rings enable easy installation of ducting or transition boxes.
  • Coils with raised lance fins and rifled tubing for maximum efficiency.
  • Ductable, rotatable blowers offer installation flexibility.
  • Completely insulated with 1/2
Condensate Drain Pan
  • Unique angled drain pan completely removes all condensation.
  • Dual threaded drain connections provide for watertight hose fittings.
  • Drain pan is fully insulated to prevent sweating.
Quality Assurance
  • Each unit is test run in all operating modes and leak checked.
  • All units meet or exceed applicable ABYC and U.S. Coast Guard regulations, CE Directives and general Air Conditioning and Refrigeration Industry (ARI).
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SPECIFICATIONS
Model
AH4K-FD(4)
AH6K-FD
AH9K-FD
AH12K-FD
AH16K-FD
AH18K-FD
AH24K-FD
Capacity (BTU/H)(Kcal/H)
4,000/1,008
6,000/1,512
9,000/2,268
12,000/3,024
16,000/4,032
18,000/4,545
24,000/6,048
Voltage (VAC)(3)
115 VAC/230 VAC
115 VAC/230 VAC
115 VAC/230 VAC
115 VAC/230 VAC
115 VAC/230 VAC
115 VAC/230 VAC
115 VAC/230 VAC
Cycle/Phase (Hz/o)
50/60 Hz - 1o
50/60 Hz - 1o
50/60 Hz - 1o
50/60 Hz - 1o
50/60 Hz - 1o
50/60 Hz - 1o
50/60 Hz - 1o
Amperage (FLA)
115V
0.9
1.9
2.9
2.9
3.3
3.3
N/A
230V
N/A
5.1
5.8
5.8
6.1
8.3
7.7
GMP/(Liters/min.)
1.0/3.8
1.5/5.7
2.3/8.7
3.0/11.4
4.0/15.1
4.5/17.0
6.0/22.7
Air Flow (CFM)/(M3/HR)
150/255
200/340
300/509
400/679
500/850
530/900
700/1190
> Dimensions (in/cm)
D (Depth)
9.75/24.77
13.0/33.02
14.13/35.89
14.13/35.89
14.75/37.47
16.88/42.86
M (Motor overhang)
3.38/8.59
2.75/6.99
3.75/9.53
3.75/9.53
4.0/10.16
4.13/10.48
W (Width)
15.25/38.74
16.0/40.64
19.63/49.86
19.63/49.86
20.0/50.8
23.5/59.69
H (Height)
10.75/27.31
12.25/31.12
14.13/35.89
14.13/35.89
17.5/44.45
21.0/53.34
Supply Duct Diameter
4.0/10.2
5.0/12.7
5.0/12.7
6.0/15.2
7.0/17.8
8.0/20.3
Water Inlet/Outlet
0.5
same
same
same
same
same
Condensate Drains
2 each @ 0.5
same
same
same
same
same
Weight (lbs/kg)
14.5/6.6
18.0/8.2
25.0/14.0
27.0/12.2
31.5/14.3
41.0/18.6
* Optional electric heat chill chasers are available in 1 5KW (AH6-16FK) or 1.5 kw (AH18-24FD), not available on AH4K-FD.
** AH24K utilizes a PSC blower motor.
*** "Z" at the end of the model number designates 230V (i.e. AH12KFD designates 115V, AH12KFDZ designates 230V).
**** AH4K blower can be rotated vertical or horizontal only.
Installation Guidelines for Flex Duct Air Handlers

When choosing the proper model Flex Duct Air Handler, primary consideration should be given to calculated BTU loads and available power supply.

AH-FD series air handlers are ductable units, designed to be installed low in cabin areas (under berths, lockers, etc.) and ducted to high supply air grilles. These units have rotatable blower-motor assemblies, providing flexibility to fit specific space requirements and allowing for proper duct work installations. Combinations of transition boxes may be used to supply air into more than one area from a single unit.

Securely fasten the AH-FD to a solid, level surface, using the mounting hardware provided. Be sure that the blower motor has at lest 1 inch of space in front of it to allow for proper air flow. Rotate and secure the blower, if necessary, to its proper position to provide the most direct routing of the ducting to transitions and supply air grilles. Route all ducting as smooth and straight as possible. Trim off excess ducting before making final connections. Secure the ducting every 48" (min.) to prevent movement while the vessel is under operation.

The return air inlets must be properly sized and located to allow adequate return air flow to the units. A return air filter is supplied standard with each unit. These filter assemblies should be checked periodically and cleaned when necessary. The return air grille should not be located in such a way as to allow the supply air stream to blow directly into its opening.

This will cause "short cycling" of the unit, resulting in poor performance.

The supply air grille(s) must be sized and located to allow for proper air circulation within the cabin area(s). Grille locations close to the ceiling or directed upwards provide for the best air circulation. Under sized grilles and crushed or kinked duct work will result in poor or inadequate performance.

Connect a 5/8" reinforced flexible condensate hose to the drain pan spud furthest aft. The drains may be teed together, providing there is a minimum drop of 2" from the drain pan to the tee fitting. The drain line must be routed downwards to a proper sump or overboard discharge. Properly secure the drain lines to prevent movement during vessel operation. Check the drains upon completion by pouring two quarts of water into the drain pan. NOTE: Condensation drain lines may need to be insulated when located in high heat load areas to prevent line sweating, which could cause water damage.

CAUTION: Never install your air handler in the bilge or engine room areas. Insure that the selected location is sealed from direct access to bilge and/or engine room vapors. Do not terminate condensate drain line within four (4) 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.


In the interest of product improvement, Marine Air Systems' specifications and design as outlined herein are subject to change without prior notice.



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